copy from src/bare_test/stm32_key/fwlib/src/stm32f10x_usart.c
copy to src/bare_test/4.Systick/stdlib/src/stm32f10x_usart.c
File was copied from src/bare_test/stm32_key/fwlib/src/stm32f10x_usart.c |
| | |
| | | /**
|
| | | ******************************************************************************
|
| | | * @file stm32f10x_usart.c
|
| | | * @author MCD Application Team
|
| | | * @version V3.5.0
|
| | | * @date 11-March-2011
|
| | | * @brief This file provides all the USART firmware functions.
|
| | | ******************************************************************************
|
| | | * @attention
|
| | | *
|
| | | * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
|
| | | * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
|
| | | * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
|
| | | * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
|
| | | * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
|
| | | * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
|
| | | *
|
| | | * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2>
|
| | | ******************************************************************************
|
| | | */
|
| | |
|
| | | /* Includes ------------------------------------------------------------------*/
|
| | | #include "stm32f10x_usart.h"
|
| | | #include "stm32f10x_rcc.h"
|
| | |
|
| | | /** @addtogroup STM32F10x_StdPeriph_Driver
|
| | | * @{
|
| | | */
|
| | |
|
| | | /** @defgroup USART |
| | | * @brief USART driver modules
|
| | | * @{
|
| | | */
|
| | |
|
| | | /** @defgroup USART_Private_TypesDefinitions
|
| | | * @{
|
| | | */
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /** @defgroup USART_Private_Defines
|
| | | * @{
|
| | | */
|
| | |
|
| | | #define CR1_UE_Set ((uint16_t)0x2000) /*!< USART Enable Mask */
|
| | | #define CR1_UE_Reset ((uint16_t)0xDFFF) /*!< USART Disable Mask */
|
| | |
|
| | | #define CR1_WAKE_Mask ((uint16_t)0xF7FF) /*!< USART WakeUp Method Mask */
|
| | |
|
| | | #define CR1_RWU_Set ((uint16_t)0x0002) /*!< USART mute mode Enable Mask */
|
| | | #define CR1_RWU_Reset ((uint16_t)0xFFFD) /*!< USART mute mode Enable Mask */
|
| | | #define CR1_SBK_Set ((uint16_t)0x0001) /*!< USART Break Character send Mask */
|
| | | #define CR1_CLEAR_Mask ((uint16_t)0xE9F3) /*!< USART CR1 Mask */
|
| | | #define CR2_Address_Mask ((uint16_t)0xFFF0) /*!< USART address Mask */
|
| | |
|
| | | #define CR2_LINEN_Set ((uint16_t)0x4000) /*!< USART LIN Enable Mask */
|
| | | #define CR2_LINEN_Reset ((uint16_t)0xBFFF) /*!< USART LIN Disable Mask */
|
| | |
|
| | | #define CR2_LBDL_Mask ((uint16_t)0xFFDF) /*!< USART LIN Break detection Mask */
|
| | | #define CR2_STOP_CLEAR_Mask ((uint16_t)0xCFFF) /*!< USART CR2 STOP Bits Mask */
|
| | | #define CR2_CLOCK_CLEAR_Mask ((uint16_t)0xF0FF) /*!< USART CR2 Clock Mask */
|
| | |
|
| | | #define CR3_SCEN_Set ((uint16_t)0x0020) /*!< USART SC Enable Mask */
|
| | | #define CR3_SCEN_Reset ((uint16_t)0xFFDF) /*!< USART SC Disable Mask */
|
| | |
|
| | | #define CR3_NACK_Set ((uint16_t)0x0010) /*!< USART SC NACK Enable Mask */
|
| | | #define CR3_NACK_Reset ((uint16_t)0xFFEF) /*!< USART SC NACK Disable Mask */
|
| | |
|
| | | #define CR3_HDSEL_Set ((uint16_t)0x0008) /*!< USART Half-Duplex Enable Mask */
|
| | | #define CR3_HDSEL_Reset ((uint16_t)0xFFF7) /*!< USART Half-Duplex Disable Mask */
|
| | |
|
| | | #define CR3_IRLP_Mask ((uint16_t)0xFFFB) /*!< USART IrDA LowPower mode Mask */
|
| | | #define CR3_CLEAR_Mask ((uint16_t)0xFCFF) /*!< USART CR3 Mask */
|
| | |
|
| | | #define CR3_IREN_Set ((uint16_t)0x0002) /*!< USART IrDA Enable Mask */
|
| | | #define CR3_IREN_Reset ((uint16_t)0xFFFD) /*!< USART IrDA Disable Mask */
|
| | | #define GTPR_LSB_Mask ((uint16_t)0x00FF) /*!< Guard Time Register LSB Mask */
|
| | | #define GTPR_MSB_Mask ((uint16_t)0xFF00) /*!< Guard Time Register MSB Mask */
|
| | | #define IT_Mask ((uint16_t)0x001F) /*!< USART Interrupt Mask */
|
| | |
|
| | | /* USART OverSampling-8 Mask */
|
| | | #define CR1_OVER8_Set ((u16)0x8000) /* USART OVER8 mode Enable Mask */
|
| | | #define CR1_OVER8_Reset ((u16)0x7FFF) /* USART OVER8 mode Disable Mask */
|
| | |
|
| | | /* USART One Bit Sampling Mask */
|
| | | #define CR3_ONEBITE_Set ((u16)0x0800) /* USART ONEBITE mode Enable Mask */
|
| | | #define CR3_ONEBITE_Reset ((u16)0xF7FF) /* USART ONEBITE mode Disable Mask */
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /** @defgroup USART_Private_Macros
|
| | | * @{
|
| | | */
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /** @defgroup USART_Private_Variables
|
| | | * @{
|
| | | */
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /** @defgroup USART_Private_FunctionPrototypes
|
| | | * @{
|
| | | */
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /** @defgroup USART_Private_Functions
|
| | | * @{
|
| | | */
|
| | |
|
| | | /**
|
| | | * @brief Deinitializes the USARTx peripheral registers to their default reset values.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @retval None
|
| | | */
|
| | | void USART_DeInit(USART_TypeDef* USARTx)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | |
|
| | | if (USARTx == USART1)
|
| | | {
|
| | | RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
|
| | | RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
|
| | | }
|
| | | else if (USARTx == USART2)
|
| | | {
|
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
|
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
|
| | | }
|
| | | else if (USARTx == USART3)
|
| | | {
|
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE);
|
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE);
|
| | | } |
| | | else if (USARTx == UART4)
|
| | | {
|
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, ENABLE);
|
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, DISABLE);
|
| | | } |
| | | else
|
| | | {
|
| | | if (USARTx == UART5)
|
| | | { |
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, ENABLE);
|
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, DISABLE);
|
| | | }
|
| | | }
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Initializes the USARTx peripheral according to the specified
|
| | | * parameters in the USART_InitStruct .
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param USART_InitStruct: pointer to a USART_InitTypeDef structure
|
| | | * that contains the configuration information for the specified USART |
| | | * peripheral.
|
| | | * @retval None
|
| | | */
|
| | | void USART_Init(USART_TypeDef* USARTx, USART_InitTypeDef* USART_InitStruct)
|
| | | {
|
| | | uint32_t tmpreg = 0x00, apbclock = 0x00;
|
| | | uint32_t integerdivider = 0x00;
|
| | | uint32_t fractionaldivider = 0x00;
|
| | | uint32_t usartxbase = 0;
|
| | | RCC_ClocksTypeDef RCC_ClocksStatus;
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_USART_BAUDRATE(USART_InitStruct->USART_BaudRate)); |
| | | assert_param(IS_USART_WORD_LENGTH(USART_InitStruct->USART_WordLength));
|
| | | assert_param(IS_USART_STOPBITS(USART_InitStruct->USART_StopBits));
|
| | | assert_param(IS_USART_PARITY(USART_InitStruct->USART_Parity));
|
| | | assert_param(IS_USART_MODE(USART_InitStruct->USART_Mode));
|
| | | assert_param(IS_USART_HARDWARE_FLOW_CONTROL(USART_InitStruct->USART_HardwareFlowControl));
|
| | | /* The hardware flow control is available only for USART1, USART2 and USART3 */
|
| | | if (USART_InitStruct->USART_HardwareFlowControl != USART_HardwareFlowControl_None)
|
| | | {
|
| | | assert_param(IS_USART_123_PERIPH(USARTx));
|
| | | }
|
| | |
|
| | | usartxbase = (uint32_t)USARTx;
|
| | |
|
| | | /*---------------------------- USART CR2 Configuration -----------------------*/
|
| | | tmpreg = USARTx->CR2;
|
| | | /* Clear STOP[13:12] bits */
|
| | | tmpreg &= CR2_STOP_CLEAR_Mask;
|
| | | /* Configure the USART Stop Bits, Clock, CPOL, CPHA and LastBit ------------*/
|
| | | /* Set STOP[13:12] bits according to USART_StopBits value */
|
| | | tmpreg |= (uint32_t)USART_InitStruct->USART_StopBits;
|
| | | |
| | | /* Write to USART CR2 */
|
| | | USARTx->CR2 = (uint16_t)tmpreg;
|
| | |
|
| | | /*---------------------------- USART CR1 Configuration -----------------------*/
|
| | | tmpreg = USARTx->CR1;
|
| | | /* Clear M, PCE, PS, TE and RE bits */
|
| | | tmpreg &= CR1_CLEAR_Mask;
|
| | | /* Configure the USART Word Length, Parity and mode ----------------------- */
|
| | | /* Set the M bits according to USART_WordLength value */
|
| | | /* Set PCE and PS bits according to USART_Parity value */
|
| | | /* Set TE and RE bits according to USART_Mode value */
|
| | | tmpreg |= (uint32_t)USART_InitStruct->USART_WordLength | USART_InitStruct->USART_Parity |
|
| | | USART_InitStruct->USART_Mode;
|
| | | /* Write to USART CR1 */
|
| | | USARTx->CR1 = (uint16_t)tmpreg;
|
| | |
|
| | | /*---------------------------- USART CR3 Configuration -----------------------*/ |
| | | tmpreg = USARTx->CR3;
|
| | | /* Clear CTSE and RTSE bits */
|
| | | tmpreg &= CR3_CLEAR_Mask;
|
| | | /* Configure the USART HFC -------------------------------------------------*/
|
| | | /* Set CTSE and RTSE bits according to USART_HardwareFlowControl value */
|
| | | tmpreg |= USART_InitStruct->USART_HardwareFlowControl;
|
| | | /* Write to USART CR3 */
|
| | | USARTx->CR3 = (uint16_t)tmpreg;
|
| | |
|
| | | /*---------------------------- USART BRR Configuration -----------------------*/
|
| | | /* Configure the USART Baud Rate -------------------------------------------*/
|
| | | RCC_GetClocksFreq(&RCC_ClocksStatus);
|
| | | if (usartxbase == USART1_BASE)
|
| | | {
|
| | | apbclock = RCC_ClocksStatus.PCLK2_Frequency;
|
| | | }
|
| | | else
|
| | | {
|
| | | apbclock = RCC_ClocksStatus.PCLK1_Frequency;
|
| | | }
|
| | | |
| | | /* Determine the integer part */
|
| | | if ((USARTx->CR1 & CR1_OVER8_Set) != 0)
|
| | | {
|
| | | /* Integer part computing in case Oversampling mode is 8 Samples */
|
| | | integerdivider = ((25 * apbclock) / (2 * (USART_InitStruct->USART_BaudRate))); |
| | | }
|
| | | else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */
|
| | | {
|
| | | /* Integer part computing in case Oversampling mode is 16 Samples */
|
| | | integerdivider = ((25 * apbclock) / (4 * (USART_InitStruct->USART_BaudRate))); |
| | | }
|
| | | tmpreg = (integerdivider / 100) << 4;
|
| | |
|
| | | /* Determine the fractional part */
|
| | | fractionaldivider = integerdivider - (100 * (tmpreg >> 4));
|
| | |
|
| | | /* Implement the fractional part in the register */
|
| | | if ((USARTx->CR1 & CR1_OVER8_Set) != 0)
|
| | | {
|
| | | tmpreg |= ((((fractionaldivider * 8) + 50) / 100)) & ((uint8_t)0x07);
|
| | | }
|
| | | else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */
|
| | | {
|
| | | tmpreg |= ((((fractionaldivider * 16) + 50) / 100)) & ((uint8_t)0x0F);
|
| | | }
|
| | | |
| | | /* Write to USART BRR */
|
| | | USARTx->BRR = (uint16_t)tmpreg;
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Fills each USART_InitStruct member with its default value.
|
| | | * @param USART_InitStruct: pointer to a USART_InitTypeDef structure
|
| | | * which will be initialized.
|
| | | * @retval None
|
| | | */
|
| | | void USART_StructInit(USART_InitTypeDef* USART_InitStruct)
|
| | | {
|
| | | /* USART_InitStruct members default value */
|
| | | USART_InitStruct->USART_BaudRate = 9600;
|
| | | USART_InitStruct->USART_WordLength = USART_WordLength_8b;
|
| | | USART_InitStruct->USART_StopBits = USART_StopBits_1;
|
| | | USART_InitStruct->USART_Parity = USART_Parity_No ;
|
| | | USART_InitStruct->USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
|
| | | USART_InitStruct->USART_HardwareFlowControl = USART_HardwareFlowControl_None; |
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Initializes the USARTx peripheral Clock according to the |
| | | * specified parameters in the USART_ClockInitStruct .
|
| | | * @param USARTx: where x can be 1, 2, 3 to select the USART peripheral.
|
| | | * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
|
| | | * structure that contains the configuration information for the specified |
| | | * USART peripheral. |
| | | * @note The Smart Card and Synchronous modes are not available for UART4 and UART5.
|
| | | * @retval None
|
| | | */
|
| | | void USART_ClockInit(USART_TypeDef* USARTx, USART_ClockInitTypeDef* USART_ClockInitStruct)
|
| | | {
|
| | | uint32_t tmpreg = 0x00;
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_123_PERIPH(USARTx));
|
| | | assert_param(IS_USART_CLOCK(USART_ClockInitStruct->USART_Clock));
|
| | | assert_param(IS_USART_CPOL(USART_ClockInitStruct->USART_CPOL));
|
| | | assert_param(IS_USART_CPHA(USART_ClockInitStruct->USART_CPHA));
|
| | | assert_param(IS_USART_LASTBIT(USART_ClockInitStruct->USART_LastBit));
|
| | | |
| | | /*---------------------------- USART CR2 Configuration -----------------------*/
|
| | | tmpreg = USARTx->CR2;
|
| | | /* Clear CLKEN, CPOL, CPHA and LBCL bits */
|
| | | tmpreg &= CR2_CLOCK_CLEAR_Mask;
|
| | | /* Configure the USART Clock, CPOL, CPHA and LastBit ------------*/
|
| | | /* Set CLKEN bit according to USART_Clock value */
|
| | | /* Set CPOL bit according to USART_CPOL value */
|
| | | /* Set CPHA bit according to USART_CPHA value */
|
| | | /* Set LBCL bit according to USART_LastBit value */
|
| | | tmpreg |= (uint32_t)USART_ClockInitStruct->USART_Clock | USART_ClockInitStruct->USART_CPOL | |
| | | USART_ClockInitStruct->USART_CPHA | USART_ClockInitStruct->USART_LastBit;
|
| | | /* Write to USART CR2 */
|
| | | USARTx->CR2 = (uint16_t)tmpreg;
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Fills each USART_ClockInitStruct member with its default value.
|
| | | * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef
|
| | | * structure which will be initialized.
|
| | | * @retval None
|
| | | */
|
| | | void USART_ClockStructInit(USART_ClockInitTypeDef* USART_ClockInitStruct)
|
| | | {
|
| | | /* USART_ClockInitStruct members default value */
|
| | | USART_ClockInitStruct->USART_Clock = USART_Clock_Disable;
|
| | | USART_ClockInitStruct->USART_CPOL = USART_CPOL_Low;
|
| | | USART_ClockInitStruct->USART_CPHA = USART_CPHA_1Edge;
|
| | | USART_ClockInitStruct->USART_LastBit = USART_LastBit_Disable;
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Enables or disables the specified USART peripheral.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param NewState: new state of the USARTx peripheral.
|
| | | * This parameter can be: ENABLE or DISABLE.
|
| | | * @retval None
|
| | | */
|
| | | void USART_Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_FUNCTIONAL_STATE(NewState));
|
| | | |
| | | if (NewState != DISABLE)
|
| | | {
|
| | | /* Enable the selected USART by setting the UE bit in the CR1 register */
|
| | | USARTx->CR1 |= CR1_UE_Set;
|
| | | }
|
| | | else
|
| | | {
|
| | | /* Disable the selected USART by clearing the UE bit in the CR1 register */
|
| | | USARTx->CR1 &= CR1_UE_Reset;
|
| | | }
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Enables or disables the specified USART interrupts.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param USART_IT: specifies the USART interrupt sources to be enabled or disabled.
|
| | | * This parameter can be one of the following values:
|
| | | * @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5)
|
| | | * @arg USART_IT_LBD: LIN Break detection interrupt
|
| | | * @arg USART_IT_TXE: Transmit Data Register empty interrupt
|
| | | * @arg USART_IT_TC: Transmission complete interrupt
|
| | | * @arg USART_IT_RXNE: Receive Data register not empty interrupt
|
| | | * @arg USART_IT_IDLE: Idle line detection interrupt
|
| | | * @arg USART_IT_PE: Parity Error interrupt
|
| | | * @arg USART_IT_ERR: Error interrupt(Frame error, noise error, overrun error)
|
| | | * @param NewState: new state of the specified USARTx interrupts.
|
| | | * This parameter can be: ENABLE or DISABLE.
|
| | | * @retval None
|
| | | */
|
| | | void USART_ITConfig(USART_TypeDef* USARTx, uint16_t USART_IT, FunctionalState NewState)
|
| | | {
|
| | | uint32_t usartreg = 0x00, itpos = 0x00, itmask = 0x00;
|
| | | uint32_t usartxbase = 0x00;
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_USART_CONFIG_IT(USART_IT));
|
| | | assert_param(IS_FUNCTIONAL_STATE(NewState));
|
| | | /* The CTS interrupt is not available for UART4 and UART5 */
|
| | | if (USART_IT == USART_IT_CTS)
|
| | | {
|
| | | assert_param(IS_USART_123_PERIPH(USARTx));
|
| | | } |
| | | |
| | | usartxbase = (uint32_t)USARTx;
|
| | |
|
| | | /* Get the USART register index */
|
| | | usartreg = (((uint8_t)USART_IT) >> 0x05);
|
| | |
|
| | | /* Get the interrupt position */
|
| | | itpos = USART_IT & IT_Mask;
|
| | | itmask = (((uint32_t)0x01) << itpos);
|
| | | |
| | | if (usartreg == 0x01) /* The IT is in CR1 register */
|
| | | {
|
| | | usartxbase += 0x0C;
|
| | | }
|
| | | else if (usartreg == 0x02) /* The IT is in CR2 register */
|
| | | {
|
| | | usartxbase += 0x10;
|
| | | }
|
| | | else /* The IT is in CR3 register */
|
| | | {
|
| | | usartxbase += 0x14; |
| | | }
|
| | | if (NewState != DISABLE)
|
| | | {
|
| | | *(__IO uint32_t*)usartxbase |= itmask;
|
| | | }
|
| | | else
|
| | | {
|
| | | *(__IO uint32_t*)usartxbase &= ~itmask;
|
| | | }
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Enables or disables the USARTÂ’s DMA interface.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param USART_DMAReq: specifies the DMA request.
|
| | | * This parameter can be any combination of the following values:
|
| | | * @arg USART_DMAReq_Tx: USART DMA transmit request
|
| | | * @arg USART_DMAReq_Rx: USART DMA receive request
|
| | | * @param NewState: new state of the DMA Request sources.
|
| | | * This parameter can be: ENABLE or DISABLE.
|
| | | * @note The DMA mode is not available for UART5 except in the STM32
|
| | | * High density value line devices(STM32F10X_HD_VL). |
| | | * @retval None
|
| | | */
|
| | | void USART_DMACmd(USART_TypeDef* USARTx, uint16_t USART_DMAReq, FunctionalState NewState)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_USART_DMAREQ(USART_DMAReq)); |
| | | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
| | | if (NewState != DISABLE)
|
| | | {
|
| | | /* Enable the DMA transfer for selected requests by setting the DMAT and/or
|
| | | DMAR bits in the USART CR3 register */
|
| | | USARTx->CR3 |= USART_DMAReq;
|
| | | }
|
| | | else
|
| | | {
|
| | | /* Disable the DMA transfer for selected requests by clearing the DMAT and/or
|
| | | DMAR bits in the USART CR3 register */
|
| | | USARTx->CR3 &= (uint16_t)~USART_DMAReq;
|
| | | }
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Sets the address of the USART node.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param USART_Address: Indicates the address of the USART node.
|
| | | * @retval None
|
| | | */
|
| | | void USART_SetAddress(USART_TypeDef* USARTx, uint8_t USART_Address)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_USART_ADDRESS(USART_Address)); |
| | | |
| | | /* Clear the USART address */
|
| | | USARTx->CR2 &= CR2_Address_Mask;
|
| | | /* Set the USART address node */
|
| | | USARTx->CR2 |= USART_Address;
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Selects the USART WakeUp method.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param USART_WakeUp: specifies the USART wakeup method.
|
| | | * This parameter can be one of the following values:
|
| | | * @arg USART_WakeUp_IdleLine: WakeUp by an idle line detection
|
| | | * @arg USART_WakeUp_AddressMark: WakeUp by an address mark
|
| | | * @retval None
|
| | | */
|
| | | void USART_WakeUpConfig(USART_TypeDef* USARTx, uint16_t USART_WakeUp)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_USART_WAKEUP(USART_WakeUp));
|
| | | |
| | | USARTx->CR1 &= CR1_WAKE_Mask;
|
| | | USARTx->CR1 |= USART_WakeUp;
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Determines if the USART is in mute mode or not.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param NewState: new state of the USART mute mode.
|
| | | * This parameter can be: ENABLE or DISABLE.
|
| | | * @retval None
|
| | | */
|
| | | void USART_ReceiverWakeUpCmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
| | | |
| | | if (NewState != DISABLE)
|
| | | {
|
| | | /* Enable the USART mute mode by setting the RWU bit in the CR1 register */
|
| | | USARTx->CR1 |= CR1_RWU_Set;
|
| | | }
|
| | | else
|
| | | {
|
| | | /* Disable the USART mute mode by clearing the RWU bit in the CR1 register */
|
| | | USARTx->CR1 &= CR1_RWU_Reset;
|
| | | }
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Sets the USART LIN Break detection length.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param USART_LINBreakDetectLength: specifies the LIN break detection length.
|
| | | * This parameter can be one of the following values:
|
| | | * @arg USART_LINBreakDetectLength_10b: 10-bit break detection
|
| | | * @arg USART_LINBreakDetectLength_11b: 11-bit break detection
|
| | | * @retval None
|
| | | */
|
| | | void USART_LINBreakDetectLengthConfig(USART_TypeDef* USARTx, uint16_t USART_LINBreakDetectLength)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_USART_LIN_BREAK_DETECT_LENGTH(USART_LINBreakDetectLength));
|
| | | |
| | | USARTx->CR2 &= CR2_LBDL_Mask;
|
| | | USARTx->CR2 |= USART_LINBreakDetectLength; |
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Enables or disables the USARTÂ’s LIN mode.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param NewState: new state of the USART LIN mode.
|
| | | * This parameter can be: ENABLE or DISABLE.
|
| | | * @retval None
|
| | | */
|
| | | void USART_LINCmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_FUNCTIONAL_STATE(NewState));
|
| | | |
| | | if (NewState != DISABLE)
|
| | | {
|
| | | /* Enable the LIN mode by setting the LINEN bit in the CR2 register */
|
| | | USARTx->CR2 |= CR2_LINEN_Set;
|
| | | }
|
| | | else
|
| | | {
|
| | | /* Disable the LIN mode by clearing the LINEN bit in the CR2 register */
|
| | | USARTx->CR2 &= CR2_LINEN_Reset;
|
| | | }
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Transmits single data through the USARTx peripheral.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param Data: the data to transmit.
|
| | | * @retval None
|
| | | */
|
| | | void USART_SendData(USART_TypeDef* USARTx, uint16_t Data)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_USART_DATA(Data)); |
| | | |
| | | /* Transmit Data */
|
| | | USARTx->DR = (Data & (uint16_t)0x01FF);
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Returns the most recent received data by the USARTx peripheral.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @retval The received data.
|
| | | */
|
| | | uint16_t USART_ReceiveData(USART_TypeDef* USARTx)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | |
| | | /* Receive Data */
|
| | | return (uint16_t)(USARTx->DR & (uint16_t)0x01FF);
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Transmits break characters.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @retval None
|
| | | */
|
| | | void USART_SendBreak(USART_TypeDef* USARTx)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | |
| | | /* Send break characters */
|
| | | USARTx->CR1 |= CR1_SBK_Set;
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Sets the specified USART guard time.
|
| | | * @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral.
|
| | | * @param USART_GuardTime: specifies the guard time.
|
| | | * @note The guard time bits are not available for UART4 and UART5. |
| | | * @retval None
|
| | | */
|
| | | void USART_SetGuardTime(USART_TypeDef* USARTx, uint8_t USART_GuardTime)
|
| | | { |
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_123_PERIPH(USARTx));
|
| | | |
| | | /* Clear the USART Guard time */
|
| | | USARTx->GTPR &= GTPR_LSB_Mask;
|
| | | /* Set the USART guard time */
|
| | | USARTx->GTPR |= (uint16_t)((uint16_t)USART_GuardTime << 0x08);
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Sets the system clock prescaler.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param USART_Prescaler: specifies the prescaler clock. |
| | | * @note The function is used for IrDA mode with UART4 and UART5.
|
| | | * @retval None
|
| | | */
|
| | | void USART_SetPrescaler(USART_TypeDef* USARTx, uint8_t USART_Prescaler)
|
| | | { |
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | |
| | | /* Clear the USART prescaler */
|
| | | USARTx->GTPR &= GTPR_MSB_Mask;
|
| | | /* Set the USART prescaler */
|
| | | USARTx->GTPR |= USART_Prescaler;
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Enables or disables the USARTÂ’s Smart Card mode.
|
| | | * @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral.
|
| | | * @param NewState: new state of the Smart Card mode.
|
| | | * This parameter can be: ENABLE or DISABLE. |
| | | * @note The Smart Card mode is not available for UART4 and UART5. |
| | | * @retval None
|
| | | */
|
| | | void USART_SmartCardCmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_123_PERIPH(USARTx));
|
| | | assert_param(IS_FUNCTIONAL_STATE(NewState));
|
| | | if (NewState != DISABLE)
|
| | | {
|
| | | /* Enable the SC mode by setting the SCEN bit in the CR3 register */
|
| | | USARTx->CR3 |= CR3_SCEN_Set;
|
| | | }
|
| | | else
|
| | | {
|
| | | /* Disable the SC mode by clearing the SCEN bit in the CR3 register */
|
| | | USARTx->CR3 &= CR3_SCEN_Reset;
|
| | | }
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Enables or disables NACK transmission.
|
| | | * @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral. |
| | | * @param NewState: new state of the NACK transmission.
|
| | | * This parameter can be: ENABLE or DISABLE. |
| | | * @note The Smart Card mode is not available for UART4 and UART5.
|
| | | * @retval None
|
| | | */
|
| | | void USART_SmartCardNACKCmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_123_PERIPH(USARTx)); |
| | | assert_param(IS_FUNCTIONAL_STATE(NewState));
|
| | | if (NewState != DISABLE)
|
| | | {
|
| | | /* Enable the NACK transmission by setting the NACK bit in the CR3 register */
|
| | | USARTx->CR3 |= CR3_NACK_Set;
|
| | | }
|
| | | else
|
| | | {
|
| | | /* Disable the NACK transmission by clearing the NACK bit in the CR3 register */
|
| | | USARTx->CR3 &= CR3_NACK_Reset;
|
| | | }
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Enables or disables the USARTÂ’s Half Duplex communication.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param NewState: new state of the USART Communication.
|
| | | * This parameter can be: ENABLE or DISABLE.
|
| | | * @retval None
|
| | | */
|
| | | void USART_HalfDuplexCmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_FUNCTIONAL_STATE(NewState));
|
| | | |
| | | if (NewState != DISABLE)
|
| | | {
|
| | | /* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */
|
| | | USARTx->CR3 |= CR3_HDSEL_Set;
|
| | | }
|
| | | else
|
| | | {
|
| | | /* Disable the Half-Duplex mode by clearing the HDSEL bit in the CR3 register */
|
| | | USARTx->CR3 &= CR3_HDSEL_Reset;
|
| | | }
|
| | | }
|
| | |
|
| | |
|
| | | /**
|
| | | * @brief Enables or disables the USART's 8x oversampling mode.
|
| | | * @param USARTx: Select the USART or the UART peripheral.
|
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param NewState: new state of the USART one bit sampling method.
|
| | | * This parameter can be: ENABLE or DISABLE.
|
| | | * @note
|
| | | * This function has to be called before calling USART_Init()
|
| | | * function in order to have correct baudrate Divider value. |
| | | * @retval None
|
| | | */
|
| | | void USART_OverSampling8Cmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_FUNCTIONAL_STATE(NewState));
|
| | | |
| | | if (NewState != DISABLE)
|
| | | {
|
| | | /* Enable the 8x Oversampling mode by setting the OVER8 bit in the CR1 register */
|
| | | USARTx->CR1 |= CR1_OVER8_Set;
|
| | | }
|
| | | else
|
| | | {
|
| | | /* Disable the 8x Oversampling mode by clearing the OVER8 bit in the CR1 register */
|
| | | USARTx->CR1 &= CR1_OVER8_Reset;
|
| | | }
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Enables or disables the USART's one bit sampling method.
|
| | | * @param USARTx: Select the USART or the UART peripheral.
|
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param NewState: new state of the USART one bit sampling method.
|
| | | * This parameter can be: ENABLE or DISABLE.
|
| | | * @retval None
|
| | | */
|
| | | void USART_OneBitMethodCmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_FUNCTIONAL_STATE(NewState));
|
| | | |
| | | if (NewState != DISABLE)
|
| | | {
|
| | | /* Enable the one bit method by setting the ONEBITE bit in the CR3 register */
|
| | | USARTx->CR3 |= CR3_ONEBITE_Set;
|
| | | }
|
| | | else
|
| | | {
|
| | | /* Disable tthe one bit method by clearing the ONEBITE bit in the CR3 register */
|
| | | USARTx->CR3 &= CR3_ONEBITE_Reset;
|
| | | }
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Configures the USART's IrDA interface.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param USART_IrDAMode: specifies the IrDA mode.
|
| | | * This parameter can be one of the following values:
|
| | | * @arg USART_IrDAMode_LowPower
|
| | | * @arg USART_IrDAMode_Normal
|
| | | * @retval None
|
| | | */
|
| | | void USART_IrDAConfig(USART_TypeDef* USARTx, uint16_t USART_IrDAMode)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_USART_IRDA_MODE(USART_IrDAMode));
|
| | | |
| | | USARTx->CR3 &= CR3_IRLP_Mask;
|
| | | USARTx->CR3 |= USART_IrDAMode;
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Enables or disables the USART's IrDA interface.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param NewState: new state of the IrDA mode.
|
| | | * This parameter can be: ENABLE or DISABLE.
|
| | | * @retval None
|
| | | */
|
| | | void USART_IrDACmd(USART_TypeDef* USARTx, FunctionalState NewState)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_FUNCTIONAL_STATE(NewState));
|
| | | |
| | | if (NewState != DISABLE)
|
| | | {
|
| | | /* Enable the IrDA mode by setting the IREN bit in the CR3 register */
|
| | | USARTx->CR3 |= CR3_IREN_Set;
|
| | | }
|
| | | else
|
| | | {
|
| | | /* Disable the IrDA mode by clearing the IREN bit in the CR3 register */
|
| | | USARTx->CR3 &= CR3_IREN_Reset;
|
| | | }
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Checks whether the specified USART flag is set or not.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param USART_FLAG: specifies the flag to check.
|
| | | * This parameter can be one of the following values:
|
| | | * @arg USART_FLAG_CTS: CTS Change flag (not available for UART4 and UART5)
|
| | | * @arg USART_FLAG_LBD: LIN Break detection flag
|
| | | * @arg USART_FLAG_TXE: Transmit data register empty flag
|
| | | * @arg USART_FLAG_TC: Transmission Complete flag
|
| | | * @arg USART_FLAG_RXNE: Receive data register not empty flag
|
| | | * @arg USART_FLAG_IDLE: Idle Line detection flag
|
| | | * @arg USART_FLAG_ORE: OverRun Error flag
|
| | | * @arg USART_FLAG_NE: Noise Error flag
|
| | | * @arg USART_FLAG_FE: Framing Error flag
|
| | | * @arg USART_FLAG_PE: Parity Error flag
|
| | | * @retval The new state of USART_FLAG (SET or RESET).
|
| | | */
|
| | | FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint16_t USART_FLAG)
|
| | | {
|
| | | FlagStatus bitstatus = RESET;
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_USART_FLAG(USART_FLAG));
|
| | | /* The CTS flag is not available for UART4 and UART5 */
|
| | | if (USART_FLAG == USART_FLAG_CTS)
|
| | | {
|
| | | assert_param(IS_USART_123_PERIPH(USARTx));
|
| | | } |
| | | |
| | | if ((USARTx->SR & USART_FLAG) != (uint16_t)RESET)
|
| | | {
|
| | | bitstatus = SET;
|
| | | }
|
| | | else
|
| | | {
|
| | | bitstatus = RESET;
|
| | | }
|
| | | return bitstatus;
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Clears the USARTx's pending flags.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param USART_FLAG: specifies the flag to clear.
|
| | | * This parameter can be any combination of the following values:
|
| | | * @arg USART_FLAG_CTS: CTS Change flag (not available for UART4 and UART5).
|
| | | * @arg USART_FLAG_LBD: LIN Break detection flag.
|
| | | * @arg USART_FLAG_TC: Transmission Complete flag.
|
| | | * @arg USART_FLAG_RXNE: Receive data register not empty flag.
|
| | | * |
| | | * @note
|
| | | * - PE (Parity error), FE (Framing error), NE (Noise error), ORE (OverRun |
| | | * error) and IDLE (Idle line detected) flags are cleared by software |
| | | * sequence: a read operation to USART_SR register (USART_GetFlagStatus()) |
| | | * followed by a read operation to USART_DR register (USART_ReceiveData()).
|
| | | * - RXNE flag can be also cleared by a read to the USART_DR register |
| | | * (USART_ReceiveData()).
|
| | | * - TC flag can be also cleared by software sequence: a read operation to |
| | | * USART_SR register (USART_GetFlagStatus()) followed by a write operation
|
| | | * to USART_DR register (USART_SendData()).
|
| | | * - TXE flag is cleared only by a write to the USART_DR register |
| | | * (USART_SendData()).
|
| | | * @retval None
|
| | | */
|
| | | void USART_ClearFlag(USART_TypeDef* USARTx, uint16_t USART_FLAG)
|
| | | {
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_USART_CLEAR_FLAG(USART_FLAG));
|
| | | /* The CTS flag is not available for UART4 and UART5 */
|
| | | if ((USART_FLAG & USART_FLAG_CTS) == USART_FLAG_CTS)
|
| | | {
|
| | | assert_param(IS_USART_123_PERIPH(USARTx));
|
| | | } |
| | | |
| | | USARTx->SR = (uint16_t)~USART_FLAG;
|
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Checks whether the specified USART interrupt has occurred or not.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param USART_IT: specifies the USART interrupt source to check.
|
| | | * This parameter can be one of the following values:
|
| | | * @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5)
|
| | | * @arg USART_IT_LBD: LIN Break detection interrupt
|
| | | * @arg USART_IT_TXE: Tansmit Data Register empty interrupt
|
| | | * @arg USART_IT_TC: Transmission complete interrupt
|
| | | * @arg USART_IT_RXNE: Receive Data register not empty interrupt
|
| | | * @arg USART_IT_IDLE: Idle line detection interrupt
|
| | | * @arg USART_IT_ORE: OverRun Error interrupt
|
| | | * @arg USART_IT_NE: Noise Error interrupt
|
| | | * @arg USART_IT_FE: Framing Error interrupt
|
| | | * @arg USART_IT_PE: Parity Error interrupt
|
| | | * @retval The new state of USART_IT (SET or RESET).
|
| | | */
|
| | | ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint16_t USART_IT)
|
| | | {
|
| | | uint32_t bitpos = 0x00, itmask = 0x00, usartreg = 0x00;
|
| | | ITStatus bitstatus = RESET;
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_USART_GET_IT(USART_IT));
|
| | | /* The CTS interrupt is not available for UART4 and UART5 */ |
| | | if (USART_IT == USART_IT_CTS)
|
| | | {
|
| | | assert_param(IS_USART_123_PERIPH(USARTx));
|
| | | } |
| | | |
| | | /* Get the USART register index */
|
| | | usartreg = (((uint8_t)USART_IT) >> 0x05);
|
| | | /* Get the interrupt position */
|
| | | itmask = USART_IT & IT_Mask;
|
| | | itmask = (uint32_t)0x01 << itmask;
|
| | | |
| | | if (usartreg == 0x01) /* The IT is in CR1 register */
|
| | | {
|
| | | itmask &= USARTx->CR1;
|
| | | }
|
| | | else if (usartreg == 0x02) /* The IT is in CR2 register */
|
| | | {
|
| | | itmask &= USARTx->CR2;
|
| | | }
|
| | | else /* The IT is in CR3 register */
|
| | | {
|
| | | itmask &= USARTx->CR3;
|
| | | }
|
| | | |
| | | bitpos = USART_IT >> 0x08;
|
| | | bitpos = (uint32_t)0x01 << bitpos;
|
| | | bitpos &= USARTx->SR;
|
| | | if ((itmask != (uint16_t)RESET)&&(bitpos != (uint16_t)RESET))
|
| | | {
|
| | | bitstatus = SET;
|
| | | }
|
| | | else
|
| | | {
|
| | | bitstatus = RESET;
|
| | | }
|
| | | |
| | | return bitstatus; |
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Clears the USARTx's interrupt pending bits.
|
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values:
|
| | | * USART1, USART2, USART3, UART4 or UART5.
|
| | | * @param USART_IT: specifies the interrupt pending bit to clear.
|
| | | * This parameter can be one of the following values:
|
| | | * @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5)
|
| | | * @arg USART_IT_LBD: LIN Break detection interrupt
|
| | | * @arg USART_IT_TC: Transmission complete interrupt. |
| | | * @arg USART_IT_RXNE: Receive Data register not empty interrupt.
|
| | | * |
| | | * @note
|
| | | * - PE (Parity error), FE (Framing error), NE (Noise error), ORE (OverRun |
| | | * error) and IDLE (Idle line detected) pending bits are cleared by |
| | | * software sequence: a read operation to USART_SR register |
| | | * (USART_GetITStatus()) followed by a read operation to USART_DR register |
| | | * (USART_ReceiveData()).
|
| | | * - RXNE pending bit can be also cleared by a read to the USART_DR register |
| | | * (USART_ReceiveData()).
|
| | | * - TC pending bit can be also cleared by software sequence: a read |
| | | * operation to USART_SR register (USART_GetITStatus()) followed by a write |
| | | * operation to USART_DR register (USART_SendData()).
|
| | | * - TXE pending bit is cleared only by a write to the USART_DR register |
| | | * (USART_SendData()).
|
| | | * @retval None
|
| | | */
|
| | | void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint16_t USART_IT)
|
| | | {
|
| | | uint16_t bitpos = 0x00, itmask = 0x00;
|
| | | /* Check the parameters */
|
| | | assert_param(IS_USART_ALL_PERIPH(USARTx));
|
| | | assert_param(IS_USART_CLEAR_IT(USART_IT));
|
| | | /* The CTS interrupt is not available for UART4 and UART5 */
|
| | | if (USART_IT == USART_IT_CTS)
|
| | | {
|
| | | assert_param(IS_USART_123_PERIPH(USARTx));
|
| | | } |
| | | |
| | | bitpos = USART_IT >> 0x08;
|
| | | itmask = ((uint16_t)0x01 << (uint16_t)bitpos);
|
| | | USARTx->SR = (uint16_t)~itmask;
|
| | | }
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
|
| | | /** |
| | | ****************************************************************************** |
| | | * @file stm32f10x_usart.c |
| | | * @author MCD Application Team |
| | | * @version V3.5.0 |
| | | * @date 11-March-2011 |
| | | * @brief This file provides all the USART firmware functions. |
| | | ****************************************************************************** |
| | | * @attention |
| | | * |
| | | * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS |
| | | * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE |
| | | * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY |
| | | * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING |
| | | * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE |
| | | * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. |
| | | * |
| | | * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> |
| | | ****************************************************************************** |
| | | */ |
| | | |
| | | /* Includes ------------------------------------------------------------------*/ |
| | | #include "stm32f10x_usart.h" |
| | | #include "stm32f10x_rcc.h" |
| | | |
| | | /** @addtogroup STM32F10x_StdPeriph_Driver |
| | | * @{ |
| | | */ |
| | | |
| | | /** @defgroup USART |
| | | * @brief USART driver modules |
| | | * @{ |
| | | */ |
| | | |
| | | /** @defgroup USART_Private_TypesDefinitions |
| | | * @{ |
| | | */ |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** @defgroup USART_Private_Defines |
| | | * @{ |
| | | */ |
| | | |
| | | #define CR1_UE_Set ((uint16_t)0x2000) /*!< USART Enable Mask */ |
| | | #define CR1_UE_Reset ((uint16_t)0xDFFF) /*!< USART Disable Mask */ |
| | | |
| | | #define CR1_WAKE_Mask ((uint16_t)0xF7FF) /*!< USART WakeUp Method Mask */ |
| | | |
| | | #define CR1_RWU_Set ((uint16_t)0x0002) /*!< USART mute mode Enable Mask */ |
| | | #define CR1_RWU_Reset ((uint16_t)0xFFFD) /*!< USART mute mode Enable Mask */ |
| | | #define CR1_SBK_Set ((uint16_t)0x0001) /*!< USART Break Character send Mask */ |
| | | #define CR1_CLEAR_Mask ((uint16_t)0xE9F3) /*!< USART CR1 Mask */ |
| | | #define CR2_Address_Mask ((uint16_t)0xFFF0) /*!< USART address Mask */ |
| | | |
| | | #define CR2_LINEN_Set ((uint16_t)0x4000) /*!< USART LIN Enable Mask */ |
| | | #define CR2_LINEN_Reset ((uint16_t)0xBFFF) /*!< USART LIN Disable Mask */ |
| | | |
| | | #define CR2_LBDL_Mask ((uint16_t)0xFFDF) /*!< USART LIN Break detection Mask */ |
| | | #define CR2_STOP_CLEAR_Mask ((uint16_t)0xCFFF) /*!< USART CR2 STOP Bits Mask */ |
| | | #define CR2_CLOCK_CLEAR_Mask ((uint16_t)0xF0FF) /*!< USART CR2 Clock Mask */ |
| | | |
| | | #define CR3_SCEN_Set ((uint16_t)0x0020) /*!< USART SC Enable Mask */ |
| | | #define CR3_SCEN_Reset ((uint16_t)0xFFDF) /*!< USART SC Disable Mask */ |
| | | |
| | | #define CR3_NACK_Set ((uint16_t)0x0010) /*!< USART SC NACK Enable Mask */ |
| | | #define CR3_NACK_Reset ((uint16_t)0xFFEF) /*!< USART SC NACK Disable Mask */ |
| | | |
| | | #define CR3_HDSEL_Set ((uint16_t)0x0008) /*!< USART Half-Duplex Enable Mask */ |
| | | #define CR3_HDSEL_Reset ((uint16_t)0xFFF7) /*!< USART Half-Duplex Disable Mask */ |
| | | |
| | | #define CR3_IRLP_Mask ((uint16_t)0xFFFB) /*!< USART IrDA LowPower mode Mask */ |
| | | #define CR3_CLEAR_Mask ((uint16_t)0xFCFF) /*!< USART CR3 Mask */ |
| | | |
| | | #define CR3_IREN_Set ((uint16_t)0x0002) /*!< USART IrDA Enable Mask */ |
| | | #define CR3_IREN_Reset ((uint16_t)0xFFFD) /*!< USART IrDA Disable Mask */ |
| | | #define GTPR_LSB_Mask ((uint16_t)0x00FF) /*!< Guard Time Register LSB Mask */ |
| | | #define GTPR_MSB_Mask ((uint16_t)0xFF00) /*!< Guard Time Register MSB Mask */ |
| | | #define IT_Mask ((uint16_t)0x001F) /*!< USART Interrupt Mask */ |
| | | |
| | | /* USART OverSampling-8 Mask */ |
| | | #define CR1_OVER8_Set ((u16)0x8000) /* USART OVER8 mode Enable Mask */ |
| | | #define CR1_OVER8_Reset ((u16)0x7FFF) /* USART OVER8 mode Disable Mask */ |
| | | |
| | | /* USART One Bit Sampling Mask */ |
| | | #define CR3_ONEBITE_Set ((u16)0x0800) /* USART ONEBITE mode Enable Mask */ |
| | | #define CR3_ONEBITE_Reset ((u16)0xF7FF) /* USART ONEBITE mode Disable Mask */ |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** @defgroup USART_Private_Macros |
| | | * @{ |
| | | */ |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** @defgroup USART_Private_Variables |
| | | * @{ |
| | | */ |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** @defgroup USART_Private_FunctionPrototypes |
| | | * @{ |
| | | */ |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** @defgroup USART_Private_Functions |
| | | * @{ |
| | | */ |
| | | |
| | | /** |
| | | * @brief Deinitializes the USARTx peripheral registers to their default reset values. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @retval None |
| | | */ |
| | | void USART_DeInit(USART_TypeDef* USARTx) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | |
| | | if (USARTx == USART1) |
| | | { |
| | | RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE); |
| | | RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE); |
| | | } |
| | | else if (USARTx == USART2) |
| | | { |
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE); |
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE); |
| | | } |
| | | else if (USARTx == USART3) |
| | | { |
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE); |
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE); |
| | | } |
| | | else if (USARTx == UART4) |
| | | { |
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, ENABLE); |
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, DISABLE); |
| | | } |
| | | else |
| | | { |
| | | if (USARTx == UART5) |
| | | { |
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, ENABLE); |
| | | RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, DISABLE); |
| | | } |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * @brief Initializes the USARTx peripheral according to the specified |
| | | * parameters in the USART_InitStruct . |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param USART_InitStruct: pointer to a USART_InitTypeDef structure |
| | | * that contains the configuration information for the specified USART |
| | | * peripheral. |
| | | * @retval None |
| | | */ |
| | | void USART_Init(USART_TypeDef* USARTx, USART_InitTypeDef* USART_InitStruct) |
| | | { |
| | | uint32_t tmpreg = 0x00, apbclock = 0x00; |
| | | uint32_t integerdivider = 0x00; |
| | | uint32_t fractionaldivider = 0x00; |
| | | uint32_t usartxbase = 0; |
| | | RCC_ClocksTypeDef RCC_ClocksStatus; |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_USART_BAUDRATE(USART_InitStruct->USART_BaudRate)); |
| | | assert_param(IS_USART_WORD_LENGTH(USART_InitStruct->USART_WordLength)); |
| | | assert_param(IS_USART_STOPBITS(USART_InitStruct->USART_StopBits)); |
| | | assert_param(IS_USART_PARITY(USART_InitStruct->USART_Parity)); |
| | | assert_param(IS_USART_MODE(USART_InitStruct->USART_Mode)); |
| | | assert_param(IS_USART_HARDWARE_FLOW_CONTROL(USART_InitStruct->USART_HardwareFlowControl)); |
| | | /* The hardware flow control is available only for USART1, USART2 and USART3 */ |
| | | if (USART_InitStruct->USART_HardwareFlowControl != USART_HardwareFlowControl_None) |
| | | { |
| | | assert_param(IS_USART_123_PERIPH(USARTx)); |
| | | } |
| | | |
| | | usartxbase = (uint32_t)USARTx; |
| | | |
| | | /*---------------------------- USART CR2 Configuration -----------------------*/ |
| | | tmpreg = USARTx->CR2; |
| | | /* Clear STOP[13:12] bits */ |
| | | tmpreg &= CR2_STOP_CLEAR_Mask; |
| | | /* Configure the USART Stop Bits, Clock, CPOL, CPHA and LastBit ------------*/ |
| | | /* Set STOP[13:12] bits according to USART_StopBits value */ |
| | | tmpreg |= (uint32_t)USART_InitStruct->USART_StopBits; |
| | | |
| | | /* Write to USART CR2 */ |
| | | USARTx->CR2 = (uint16_t)tmpreg; |
| | | |
| | | /*---------------------------- USART CR1 Configuration -----------------------*/ |
| | | tmpreg = USARTx->CR1; |
| | | /* Clear M, PCE, PS, TE and RE bits */ |
| | | tmpreg &= CR1_CLEAR_Mask; |
| | | /* Configure the USART Word Length, Parity and mode ----------------------- */ |
| | | /* Set the M bits according to USART_WordLength value */ |
| | | /* Set PCE and PS bits according to USART_Parity value */ |
| | | /* Set TE and RE bits according to USART_Mode value */ |
| | | tmpreg |= (uint32_t)USART_InitStruct->USART_WordLength | USART_InitStruct->USART_Parity | |
| | | USART_InitStruct->USART_Mode; |
| | | /* Write to USART CR1 */ |
| | | USARTx->CR1 = (uint16_t)tmpreg; |
| | | |
| | | /*---------------------------- USART CR3 Configuration -----------------------*/ |
| | | tmpreg = USARTx->CR3; |
| | | /* Clear CTSE and RTSE bits */ |
| | | tmpreg &= CR3_CLEAR_Mask; |
| | | /* Configure the USART HFC -------------------------------------------------*/ |
| | | /* Set CTSE and RTSE bits according to USART_HardwareFlowControl value */ |
| | | tmpreg |= USART_InitStruct->USART_HardwareFlowControl; |
| | | /* Write to USART CR3 */ |
| | | USARTx->CR3 = (uint16_t)tmpreg; |
| | | |
| | | /*---------------------------- USART BRR Configuration -----------------------*/ |
| | | /* Configure the USART Baud Rate -------------------------------------------*/ |
| | | RCC_GetClocksFreq(&RCC_ClocksStatus); |
| | | if (usartxbase == USART1_BASE) |
| | | { |
| | | apbclock = RCC_ClocksStatus.PCLK2_Frequency; |
| | | } |
| | | else |
| | | { |
| | | apbclock = RCC_ClocksStatus.PCLK1_Frequency; |
| | | } |
| | | |
| | | /* Determine the integer part */ |
| | | if ((USARTx->CR1 & CR1_OVER8_Set) != 0) |
| | | { |
| | | /* Integer part computing in case Oversampling mode is 8 Samples */ |
| | | integerdivider = ((25 * apbclock) / (2 * (USART_InitStruct->USART_BaudRate))); |
| | | } |
| | | else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */ |
| | | { |
| | | /* Integer part computing in case Oversampling mode is 16 Samples */ |
| | | integerdivider = ((25 * apbclock) / (4 * (USART_InitStruct->USART_BaudRate))); |
| | | } |
| | | tmpreg = (integerdivider / 100) << 4; |
| | | |
| | | /* Determine the fractional part */ |
| | | fractionaldivider = integerdivider - (100 * (tmpreg >> 4)); |
| | | |
| | | /* Implement the fractional part in the register */ |
| | | if ((USARTx->CR1 & CR1_OVER8_Set) != 0) |
| | | { |
| | | tmpreg |= ((((fractionaldivider * 8) + 50) / 100)) & ((uint8_t)0x07); |
| | | } |
| | | else /* if ((USARTx->CR1 & CR1_OVER8_Set) == 0) */ |
| | | { |
| | | tmpreg |= ((((fractionaldivider * 16) + 50) / 100)) & ((uint8_t)0x0F); |
| | | } |
| | | |
| | | /* Write to USART BRR */ |
| | | USARTx->BRR = (uint16_t)tmpreg; |
| | | } |
| | | |
| | | /** |
| | | * @brief Fills each USART_InitStruct member with its default value. |
| | | * @param USART_InitStruct: pointer to a USART_InitTypeDef structure |
| | | * which will be initialized. |
| | | * @retval None |
| | | */ |
| | | void USART_StructInit(USART_InitTypeDef* USART_InitStruct) |
| | | { |
| | | /* USART_InitStruct members default value */ |
| | | USART_InitStruct->USART_BaudRate = 9600; |
| | | USART_InitStruct->USART_WordLength = USART_WordLength_8b; |
| | | USART_InitStruct->USART_StopBits = USART_StopBits_1; |
| | | USART_InitStruct->USART_Parity = USART_Parity_No ; |
| | | USART_InitStruct->USART_Mode = USART_Mode_Rx | USART_Mode_Tx; |
| | | USART_InitStruct->USART_HardwareFlowControl = USART_HardwareFlowControl_None; |
| | | } |
| | | |
| | | /** |
| | | * @brief Initializes the USARTx peripheral Clock according to the |
| | | * specified parameters in the USART_ClockInitStruct . |
| | | * @param USARTx: where x can be 1, 2, 3 to select the USART peripheral. |
| | | * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef |
| | | * structure that contains the configuration information for the specified |
| | | * USART peripheral. |
| | | * @note The Smart Card and Synchronous modes are not available for UART4 and UART5. |
| | | * @retval None |
| | | */ |
| | | void USART_ClockInit(USART_TypeDef* USARTx, USART_ClockInitTypeDef* USART_ClockInitStruct) |
| | | { |
| | | uint32_t tmpreg = 0x00; |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_123_PERIPH(USARTx)); |
| | | assert_param(IS_USART_CLOCK(USART_ClockInitStruct->USART_Clock)); |
| | | assert_param(IS_USART_CPOL(USART_ClockInitStruct->USART_CPOL)); |
| | | assert_param(IS_USART_CPHA(USART_ClockInitStruct->USART_CPHA)); |
| | | assert_param(IS_USART_LASTBIT(USART_ClockInitStruct->USART_LastBit)); |
| | | |
| | | /*---------------------------- USART CR2 Configuration -----------------------*/ |
| | | tmpreg = USARTx->CR2; |
| | | /* Clear CLKEN, CPOL, CPHA and LBCL bits */ |
| | | tmpreg &= CR2_CLOCK_CLEAR_Mask; |
| | | /* Configure the USART Clock, CPOL, CPHA and LastBit ------------*/ |
| | | /* Set CLKEN bit according to USART_Clock value */ |
| | | /* Set CPOL bit according to USART_CPOL value */ |
| | | /* Set CPHA bit according to USART_CPHA value */ |
| | | /* Set LBCL bit according to USART_LastBit value */ |
| | | tmpreg |= (uint32_t)USART_ClockInitStruct->USART_Clock | USART_ClockInitStruct->USART_CPOL | |
| | | USART_ClockInitStruct->USART_CPHA | USART_ClockInitStruct->USART_LastBit; |
| | | /* Write to USART CR2 */ |
| | | USARTx->CR2 = (uint16_t)tmpreg; |
| | | } |
| | | |
| | | /** |
| | | * @brief Fills each USART_ClockInitStruct member with its default value. |
| | | * @param USART_ClockInitStruct: pointer to a USART_ClockInitTypeDef |
| | | * structure which will be initialized. |
| | | * @retval None |
| | | */ |
| | | void USART_ClockStructInit(USART_ClockInitTypeDef* USART_ClockInitStruct) |
| | | { |
| | | /* USART_ClockInitStruct members default value */ |
| | | USART_ClockInitStruct->USART_Clock = USART_Clock_Disable; |
| | | USART_ClockInitStruct->USART_CPOL = USART_CPOL_Low; |
| | | USART_ClockInitStruct->USART_CPHA = USART_CPHA_1Edge; |
| | | USART_ClockInitStruct->USART_LastBit = USART_LastBit_Disable; |
| | | } |
| | | |
| | | /** |
| | | * @brief Enables or disables the specified USART peripheral. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param NewState: new state of the USARTx peripheral. |
| | | * This parameter can be: ENABLE or DISABLE. |
| | | * @retval None |
| | | */ |
| | | void USART_Cmd(USART_TypeDef* USARTx, FunctionalState NewState) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
| | | |
| | | if (NewState != DISABLE) |
| | | { |
| | | /* Enable the selected USART by setting the UE bit in the CR1 register */ |
| | | USARTx->CR1 |= CR1_UE_Set; |
| | | } |
| | | else |
| | | { |
| | | /* Disable the selected USART by clearing the UE bit in the CR1 register */ |
| | | USARTx->CR1 &= CR1_UE_Reset; |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * @brief Enables or disables the specified USART interrupts. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param USART_IT: specifies the USART interrupt sources to be enabled or disabled. |
| | | * This parameter can be one of the following values: |
| | | * @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5) |
| | | * @arg USART_IT_LBD: LIN Break detection interrupt |
| | | * @arg USART_IT_TXE: Transmit Data Register empty interrupt |
| | | * @arg USART_IT_TC: Transmission complete interrupt |
| | | * @arg USART_IT_RXNE: Receive Data register not empty interrupt |
| | | * @arg USART_IT_IDLE: Idle line detection interrupt |
| | | * @arg USART_IT_PE: Parity Error interrupt |
| | | * @arg USART_IT_ERR: Error interrupt(Frame error, noise error, overrun error) |
| | | * @param NewState: new state of the specified USARTx interrupts. |
| | | * This parameter can be: ENABLE or DISABLE. |
| | | * @retval None |
| | | */ |
| | | void USART_ITConfig(USART_TypeDef* USARTx, uint16_t USART_IT, FunctionalState NewState) |
| | | { |
| | | uint32_t usartreg = 0x00, itpos = 0x00, itmask = 0x00; |
| | | uint32_t usartxbase = 0x00; |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_USART_CONFIG_IT(USART_IT)); |
| | | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
| | | /* The CTS interrupt is not available for UART4 and UART5 */ |
| | | if (USART_IT == USART_IT_CTS) |
| | | { |
| | | assert_param(IS_USART_123_PERIPH(USARTx)); |
| | | } |
| | | |
| | | usartxbase = (uint32_t)USARTx; |
| | | |
| | | /* Get the USART register index */ |
| | | usartreg = (((uint8_t)USART_IT) >> 0x05); |
| | | |
| | | /* Get the interrupt position */ |
| | | itpos = USART_IT & IT_Mask; |
| | | itmask = (((uint32_t)0x01) << itpos); |
| | | |
| | | if (usartreg == 0x01) /* The IT is in CR1 register */ |
| | | { |
| | | usartxbase += 0x0C; |
| | | } |
| | | else if (usartreg == 0x02) /* The IT is in CR2 register */ |
| | | { |
| | | usartxbase += 0x10; |
| | | } |
| | | else /* The IT is in CR3 register */ |
| | | { |
| | | usartxbase += 0x14; |
| | | } |
| | | if (NewState != DISABLE) |
| | | { |
| | | *(__IO uint32_t*)usartxbase |= itmask; |
| | | } |
| | | else |
| | | { |
| | | *(__IO uint32_t*)usartxbase &= ~itmask; |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * @brief Enables or disables the USARTÂ’s DMA interface. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param USART_DMAReq: specifies the DMA request. |
| | | * This parameter can be any combination of the following values: |
| | | * @arg USART_DMAReq_Tx: USART DMA transmit request |
| | | * @arg USART_DMAReq_Rx: USART DMA receive request |
| | | * @param NewState: new state of the DMA Request sources. |
| | | * This parameter can be: ENABLE or DISABLE. |
| | | * @note The DMA mode is not available for UART5 except in the STM32 |
| | | * High density value line devices(STM32F10X_HD_VL). |
| | | * @retval None |
| | | */ |
| | | void USART_DMACmd(USART_TypeDef* USARTx, uint16_t USART_DMAReq, FunctionalState NewState) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_USART_DMAREQ(USART_DMAReq)); |
| | | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
| | | if (NewState != DISABLE) |
| | | { |
| | | /* Enable the DMA transfer for selected requests by setting the DMAT and/or |
| | | DMAR bits in the USART CR3 register */ |
| | | USARTx->CR3 |= USART_DMAReq; |
| | | } |
| | | else |
| | | { |
| | | /* Disable the DMA transfer for selected requests by clearing the DMAT and/or |
| | | DMAR bits in the USART CR3 register */ |
| | | USARTx->CR3 &= (uint16_t)~USART_DMAReq; |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * @brief Sets the address of the USART node. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param USART_Address: Indicates the address of the USART node. |
| | | * @retval None |
| | | */ |
| | | void USART_SetAddress(USART_TypeDef* USARTx, uint8_t USART_Address) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_USART_ADDRESS(USART_Address)); |
| | | |
| | | /* Clear the USART address */ |
| | | USARTx->CR2 &= CR2_Address_Mask; |
| | | /* Set the USART address node */ |
| | | USARTx->CR2 |= USART_Address; |
| | | } |
| | | |
| | | /** |
| | | * @brief Selects the USART WakeUp method. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param USART_WakeUp: specifies the USART wakeup method. |
| | | * This parameter can be one of the following values: |
| | | * @arg USART_WakeUp_IdleLine: WakeUp by an idle line detection |
| | | * @arg USART_WakeUp_AddressMark: WakeUp by an address mark |
| | | * @retval None |
| | | */ |
| | | void USART_WakeUpConfig(USART_TypeDef* USARTx, uint16_t USART_WakeUp) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_USART_WAKEUP(USART_WakeUp)); |
| | | |
| | | USARTx->CR1 &= CR1_WAKE_Mask; |
| | | USARTx->CR1 |= USART_WakeUp; |
| | | } |
| | | |
| | | /** |
| | | * @brief Determines if the USART is in mute mode or not. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param NewState: new state of the USART mute mode. |
| | | * This parameter can be: ENABLE or DISABLE. |
| | | * @retval None |
| | | */ |
| | | void USART_ReceiverWakeUpCmd(USART_TypeDef* USARTx, FunctionalState NewState) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
| | | |
| | | if (NewState != DISABLE) |
| | | { |
| | | /* Enable the USART mute mode by setting the RWU bit in the CR1 register */ |
| | | USARTx->CR1 |= CR1_RWU_Set; |
| | | } |
| | | else |
| | | { |
| | | /* Disable the USART mute mode by clearing the RWU bit in the CR1 register */ |
| | | USARTx->CR1 &= CR1_RWU_Reset; |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * @brief Sets the USART LIN Break detection length. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param USART_LINBreakDetectLength: specifies the LIN break detection length. |
| | | * This parameter can be one of the following values: |
| | | * @arg USART_LINBreakDetectLength_10b: 10-bit break detection |
| | | * @arg USART_LINBreakDetectLength_11b: 11-bit break detection |
| | | * @retval None |
| | | */ |
| | | void USART_LINBreakDetectLengthConfig(USART_TypeDef* USARTx, uint16_t USART_LINBreakDetectLength) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_USART_LIN_BREAK_DETECT_LENGTH(USART_LINBreakDetectLength)); |
| | | |
| | | USARTx->CR2 &= CR2_LBDL_Mask; |
| | | USARTx->CR2 |= USART_LINBreakDetectLength; |
| | | } |
| | | |
| | | /** |
| | | * @brief Enables or disables the USARTÂ’s LIN mode. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param NewState: new state of the USART LIN mode. |
| | | * This parameter can be: ENABLE or DISABLE. |
| | | * @retval None |
| | | */ |
| | | void USART_LINCmd(USART_TypeDef* USARTx, FunctionalState NewState) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
| | | |
| | | if (NewState != DISABLE) |
| | | { |
| | | /* Enable the LIN mode by setting the LINEN bit in the CR2 register */ |
| | | USARTx->CR2 |= CR2_LINEN_Set; |
| | | } |
| | | else |
| | | { |
| | | /* Disable the LIN mode by clearing the LINEN bit in the CR2 register */ |
| | | USARTx->CR2 &= CR2_LINEN_Reset; |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * @brief Transmits single data through the USARTx peripheral. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param Data: the data to transmit. |
| | | * @retval None |
| | | */ |
| | | void USART_SendData(USART_TypeDef* USARTx, uint16_t Data) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_USART_DATA(Data)); |
| | | |
| | | /* Transmit Data */ |
| | | USARTx->DR = (Data & (uint16_t)0x01FF); |
| | | } |
| | | |
| | | /** |
| | | * @brief Returns the most recent received data by the USARTx peripheral. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @retval The received data. |
| | | */ |
| | | uint16_t USART_ReceiveData(USART_TypeDef* USARTx) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | |
| | | /* Receive Data */ |
| | | return (uint16_t)(USARTx->DR & (uint16_t)0x01FF); |
| | | } |
| | | |
| | | /** |
| | | * @brief Transmits break characters. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @retval None |
| | | */ |
| | | void USART_SendBreak(USART_TypeDef* USARTx) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | |
| | | /* Send break characters */ |
| | | USARTx->CR1 |= CR1_SBK_Set; |
| | | } |
| | | |
| | | /** |
| | | * @brief Sets the specified USART guard time. |
| | | * @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral. |
| | | * @param USART_GuardTime: specifies the guard time. |
| | | * @note The guard time bits are not available for UART4 and UART5. |
| | | * @retval None |
| | | */ |
| | | void USART_SetGuardTime(USART_TypeDef* USARTx, uint8_t USART_GuardTime) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_123_PERIPH(USARTx)); |
| | | |
| | | /* Clear the USART Guard time */ |
| | | USARTx->GTPR &= GTPR_LSB_Mask; |
| | | /* Set the USART guard time */ |
| | | USARTx->GTPR |= (uint16_t)((uint16_t)USART_GuardTime << 0x08); |
| | | } |
| | | |
| | | /** |
| | | * @brief Sets the system clock prescaler. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param USART_Prescaler: specifies the prescaler clock. |
| | | * @note The function is used for IrDA mode with UART4 and UART5. |
| | | * @retval None |
| | | */ |
| | | void USART_SetPrescaler(USART_TypeDef* USARTx, uint8_t USART_Prescaler) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | |
| | | /* Clear the USART prescaler */ |
| | | USARTx->GTPR &= GTPR_MSB_Mask; |
| | | /* Set the USART prescaler */ |
| | | USARTx->GTPR |= USART_Prescaler; |
| | | } |
| | | |
| | | /** |
| | | * @brief Enables or disables the USARTÂ’s Smart Card mode. |
| | | * @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral. |
| | | * @param NewState: new state of the Smart Card mode. |
| | | * This parameter can be: ENABLE or DISABLE. |
| | | * @note The Smart Card mode is not available for UART4 and UART5. |
| | | * @retval None |
| | | */ |
| | | void USART_SmartCardCmd(USART_TypeDef* USARTx, FunctionalState NewState) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_123_PERIPH(USARTx)); |
| | | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
| | | if (NewState != DISABLE) |
| | | { |
| | | /* Enable the SC mode by setting the SCEN bit in the CR3 register */ |
| | | USARTx->CR3 |= CR3_SCEN_Set; |
| | | } |
| | | else |
| | | { |
| | | /* Disable the SC mode by clearing the SCEN bit in the CR3 register */ |
| | | USARTx->CR3 &= CR3_SCEN_Reset; |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * @brief Enables or disables NACK transmission. |
| | | * @param USARTx: where x can be 1, 2 or 3 to select the USART peripheral. |
| | | * @param NewState: new state of the NACK transmission. |
| | | * This parameter can be: ENABLE or DISABLE. |
| | | * @note The Smart Card mode is not available for UART4 and UART5. |
| | | * @retval None |
| | | */ |
| | | void USART_SmartCardNACKCmd(USART_TypeDef* USARTx, FunctionalState NewState) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_123_PERIPH(USARTx)); |
| | | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
| | | if (NewState != DISABLE) |
| | | { |
| | | /* Enable the NACK transmission by setting the NACK bit in the CR3 register */ |
| | | USARTx->CR3 |= CR3_NACK_Set; |
| | | } |
| | | else |
| | | { |
| | | /* Disable the NACK transmission by clearing the NACK bit in the CR3 register */ |
| | | USARTx->CR3 &= CR3_NACK_Reset; |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * @brief Enables or disables the USARTÂ’s Half Duplex communication. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param NewState: new state of the USART Communication. |
| | | * This parameter can be: ENABLE or DISABLE. |
| | | * @retval None |
| | | */ |
| | | void USART_HalfDuplexCmd(USART_TypeDef* USARTx, FunctionalState NewState) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
| | | |
| | | if (NewState != DISABLE) |
| | | { |
| | | /* Enable the Half-Duplex mode by setting the HDSEL bit in the CR3 register */ |
| | | USARTx->CR3 |= CR3_HDSEL_Set; |
| | | } |
| | | else |
| | | { |
| | | /* Disable the Half-Duplex mode by clearing the HDSEL bit in the CR3 register */ |
| | | USARTx->CR3 &= CR3_HDSEL_Reset; |
| | | } |
| | | } |
| | | |
| | | |
| | | /** |
| | | * @brief Enables or disables the USART's 8x oversampling mode. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param NewState: new state of the USART one bit sampling method. |
| | | * This parameter can be: ENABLE or DISABLE. |
| | | * @note |
| | | * This function has to be called before calling USART_Init() |
| | | * function in order to have correct baudrate Divider value. |
| | | * @retval None |
| | | */ |
| | | void USART_OverSampling8Cmd(USART_TypeDef* USARTx, FunctionalState NewState) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
| | | |
| | | if (NewState != DISABLE) |
| | | { |
| | | /* Enable the 8x Oversampling mode by setting the OVER8 bit in the CR1 register */ |
| | | USARTx->CR1 |= CR1_OVER8_Set; |
| | | } |
| | | else |
| | | { |
| | | /* Disable the 8x Oversampling mode by clearing the OVER8 bit in the CR1 register */ |
| | | USARTx->CR1 &= CR1_OVER8_Reset; |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * @brief Enables or disables the USART's one bit sampling method. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param NewState: new state of the USART one bit sampling method. |
| | | * This parameter can be: ENABLE or DISABLE. |
| | | * @retval None |
| | | */ |
| | | void USART_OneBitMethodCmd(USART_TypeDef* USARTx, FunctionalState NewState) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
| | | |
| | | if (NewState != DISABLE) |
| | | { |
| | | /* Enable the one bit method by setting the ONEBITE bit in the CR3 register */ |
| | | USARTx->CR3 |= CR3_ONEBITE_Set; |
| | | } |
| | | else |
| | | { |
| | | /* Disable tthe one bit method by clearing the ONEBITE bit in the CR3 register */ |
| | | USARTx->CR3 &= CR3_ONEBITE_Reset; |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * @brief Configures the USART's IrDA interface. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param USART_IrDAMode: specifies the IrDA mode. |
| | | * This parameter can be one of the following values: |
| | | * @arg USART_IrDAMode_LowPower |
| | | * @arg USART_IrDAMode_Normal |
| | | * @retval None |
| | | */ |
| | | void USART_IrDAConfig(USART_TypeDef* USARTx, uint16_t USART_IrDAMode) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_USART_IRDA_MODE(USART_IrDAMode)); |
| | | |
| | | USARTx->CR3 &= CR3_IRLP_Mask; |
| | | USARTx->CR3 |= USART_IrDAMode; |
| | | } |
| | | |
| | | /** |
| | | * @brief Enables or disables the USART's IrDA interface. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param NewState: new state of the IrDA mode. |
| | | * This parameter can be: ENABLE or DISABLE. |
| | | * @retval None |
| | | */ |
| | | void USART_IrDACmd(USART_TypeDef* USARTx, FunctionalState NewState) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_FUNCTIONAL_STATE(NewState)); |
| | | |
| | | if (NewState != DISABLE) |
| | | { |
| | | /* Enable the IrDA mode by setting the IREN bit in the CR3 register */ |
| | | USARTx->CR3 |= CR3_IREN_Set; |
| | | } |
| | | else |
| | | { |
| | | /* Disable the IrDA mode by clearing the IREN bit in the CR3 register */ |
| | | USARTx->CR3 &= CR3_IREN_Reset; |
| | | } |
| | | } |
| | | |
| | | /** |
| | | * @brief Checks whether the specified USART flag is set or not. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param USART_FLAG: specifies the flag to check. |
| | | * This parameter can be one of the following values: |
| | | * @arg USART_FLAG_CTS: CTS Change flag (not available for UART4 and UART5) |
| | | * @arg USART_FLAG_LBD: LIN Break detection flag |
| | | * @arg USART_FLAG_TXE: Transmit data register empty flag |
| | | * @arg USART_FLAG_TC: Transmission Complete flag |
| | | * @arg USART_FLAG_RXNE: Receive data register not empty flag |
| | | * @arg USART_FLAG_IDLE: Idle Line detection flag |
| | | * @arg USART_FLAG_ORE: OverRun Error flag |
| | | * @arg USART_FLAG_NE: Noise Error flag |
| | | * @arg USART_FLAG_FE: Framing Error flag |
| | | * @arg USART_FLAG_PE: Parity Error flag |
| | | * @retval The new state of USART_FLAG (SET or RESET). |
| | | */ |
| | | FlagStatus USART_GetFlagStatus(USART_TypeDef* USARTx, uint16_t USART_FLAG) |
| | | { |
| | | FlagStatus bitstatus = RESET; |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_USART_FLAG(USART_FLAG)); |
| | | /* The CTS flag is not available for UART4 and UART5 */ |
| | | if (USART_FLAG == USART_FLAG_CTS) |
| | | { |
| | | assert_param(IS_USART_123_PERIPH(USARTx)); |
| | | } |
| | | |
| | | if ((USARTx->SR & USART_FLAG) != (uint16_t)RESET) |
| | | { |
| | | bitstatus = SET; |
| | | } |
| | | else |
| | | { |
| | | bitstatus = RESET; |
| | | } |
| | | return bitstatus; |
| | | } |
| | | |
| | | /** |
| | | * @brief Clears the USARTx's pending flags. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param USART_FLAG: specifies the flag to clear. |
| | | * This parameter can be any combination of the following values: |
| | | * @arg USART_FLAG_CTS: CTS Change flag (not available for UART4 and UART5). |
| | | * @arg USART_FLAG_LBD: LIN Break detection flag. |
| | | * @arg USART_FLAG_TC: Transmission Complete flag. |
| | | * @arg USART_FLAG_RXNE: Receive data register not empty flag. |
| | | * |
| | | * @note |
| | | * - PE (Parity error), FE (Framing error), NE (Noise error), ORE (OverRun |
| | | * error) and IDLE (Idle line detected) flags are cleared by software |
| | | * sequence: a read operation to USART_SR register (USART_GetFlagStatus()) |
| | | * followed by a read operation to USART_DR register (USART_ReceiveData()). |
| | | * - RXNE flag can be also cleared by a read to the USART_DR register |
| | | * (USART_ReceiveData()). |
| | | * - TC flag can be also cleared by software sequence: a read operation to |
| | | * USART_SR register (USART_GetFlagStatus()) followed by a write operation |
| | | * to USART_DR register (USART_SendData()). |
| | | * - TXE flag is cleared only by a write to the USART_DR register |
| | | * (USART_SendData()). |
| | | * @retval None |
| | | */ |
| | | void USART_ClearFlag(USART_TypeDef* USARTx, uint16_t USART_FLAG) |
| | | { |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_USART_CLEAR_FLAG(USART_FLAG)); |
| | | /* The CTS flag is not available for UART4 and UART5 */ |
| | | if ((USART_FLAG & USART_FLAG_CTS) == USART_FLAG_CTS) |
| | | { |
| | | assert_param(IS_USART_123_PERIPH(USARTx)); |
| | | } |
| | | |
| | | USARTx->SR = (uint16_t)~USART_FLAG; |
| | | } |
| | | |
| | | /** |
| | | * @brief Checks whether the specified USART interrupt has occurred or not. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param USART_IT: specifies the USART interrupt source to check. |
| | | * This parameter can be one of the following values: |
| | | * @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5) |
| | | * @arg USART_IT_LBD: LIN Break detection interrupt |
| | | * @arg USART_IT_TXE: Tansmit Data Register empty interrupt |
| | | * @arg USART_IT_TC: Transmission complete interrupt |
| | | * @arg USART_IT_RXNE: Receive Data register not empty interrupt |
| | | * @arg USART_IT_IDLE: Idle line detection interrupt |
| | | * @arg USART_IT_ORE: OverRun Error interrupt |
| | | * @arg USART_IT_NE: Noise Error interrupt |
| | | * @arg USART_IT_FE: Framing Error interrupt |
| | | * @arg USART_IT_PE: Parity Error interrupt |
| | | * @retval The new state of USART_IT (SET or RESET). |
| | | */ |
| | | ITStatus USART_GetITStatus(USART_TypeDef* USARTx, uint16_t USART_IT) |
| | | { |
| | | uint32_t bitpos = 0x00, itmask = 0x00, usartreg = 0x00; |
| | | ITStatus bitstatus = RESET; |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_USART_GET_IT(USART_IT)); |
| | | /* The CTS interrupt is not available for UART4 and UART5 */ |
| | | if (USART_IT == USART_IT_CTS) |
| | | { |
| | | assert_param(IS_USART_123_PERIPH(USARTx)); |
| | | } |
| | | |
| | | /* Get the USART register index */ |
| | | usartreg = (((uint8_t)USART_IT) >> 0x05); |
| | | /* Get the interrupt position */ |
| | | itmask = USART_IT & IT_Mask; |
| | | itmask = (uint32_t)0x01 << itmask; |
| | | |
| | | if (usartreg == 0x01) /* The IT is in CR1 register */ |
| | | { |
| | | itmask &= USARTx->CR1; |
| | | } |
| | | else if (usartreg == 0x02) /* The IT is in CR2 register */ |
| | | { |
| | | itmask &= USARTx->CR2; |
| | | } |
| | | else /* The IT is in CR3 register */ |
| | | { |
| | | itmask &= USARTx->CR3; |
| | | } |
| | | |
| | | bitpos = USART_IT >> 0x08; |
| | | bitpos = (uint32_t)0x01 << bitpos; |
| | | bitpos &= USARTx->SR; |
| | | if ((itmask != (uint16_t)RESET)&&(bitpos != (uint16_t)RESET)) |
| | | { |
| | | bitstatus = SET; |
| | | } |
| | | else |
| | | { |
| | | bitstatus = RESET; |
| | | } |
| | | |
| | | return bitstatus; |
| | | } |
| | | |
| | | /** |
| | | * @brief Clears the USARTx's interrupt pending bits. |
| | | * @param USARTx: Select the USART or the UART peripheral. |
| | | * This parameter can be one of the following values: |
| | | * USART1, USART2, USART3, UART4 or UART5. |
| | | * @param USART_IT: specifies the interrupt pending bit to clear. |
| | | * This parameter can be one of the following values: |
| | | * @arg USART_IT_CTS: CTS change interrupt (not available for UART4 and UART5) |
| | | * @arg USART_IT_LBD: LIN Break detection interrupt |
| | | * @arg USART_IT_TC: Transmission complete interrupt. |
| | | * @arg USART_IT_RXNE: Receive Data register not empty interrupt. |
| | | * |
| | | * @note |
| | | * - PE (Parity error), FE (Framing error), NE (Noise error), ORE (OverRun |
| | | * error) and IDLE (Idle line detected) pending bits are cleared by |
| | | * software sequence: a read operation to USART_SR register |
| | | * (USART_GetITStatus()) followed by a read operation to USART_DR register |
| | | * (USART_ReceiveData()). |
| | | * - RXNE pending bit can be also cleared by a read to the USART_DR register |
| | | * (USART_ReceiveData()). |
| | | * - TC pending bit can be also cleared by software sequence: a read |
| | | * operation to USART_SR register (USART_GetITStatus()) followed by a write |
| | | * operation to USART_DR register (USART_SendData()). |
| | | * - TXE pending bit is cleared only by a write to the USART_DR register |
| | | * (USART_SendData()). |
| | | * @retval None |
| | | */ |
| | | void USART_ClearITPendingBit(USART_TypeDef* USARTx, uint16_t USART_IT) |
| | | { |
| | | uint16_t bitpos = 0x00, itmask = 0x00; |
| | | /* Check the parameters */ |
| | | assert_param(IS_USART_ALL_PERIPH(USARTx)); |
| | | assert_param(IS_USART_CLEAR_IT(USART_IT)); |
| | | /* The CTS interrupt is not available for UART4 and UART5 */ |
| | | if (USART_IT == USART_IT_CTS) |
| | | { |
| | | assert_param(IS_USART_123_PERIPH(USARTx)); |
| | | } |
| | | |
| | | bitpos = USART_IT >> 0x08; |
| | | itmask = ((uint16_t)0x01 << (uint16_t)bitpos); |
| | | USARTx->SR = (uint16_t)~itmask; |
| | | } |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |