From a22d9c106276bb1819e583012d7ea41b6529b318 Mon Sep 17 00:00:00 2001
From: guowenxue <guowenxue@gmail.com>
Date: Wed, 16 May 2018 08:14:05 +0800
Subject: [PATCH] add new LED key systick sample code
---
src/bare_test/4.Systick/stdlib/src/stm32f10x_usart.c | 2116 +++++++++++++++++++++++++++++-----------------------------
1 files changed, 1,058 insertions(+), 1,058 deletions(-)
diff --git a/src/bare_test/stm32_key/fwlib/src/stm32f10x_usart.c b/src/bare_test/4.Systick/stdlib/src/stm32f10x_usart.c
similarity index 99%
copy from src/bare_test/stm32_key/fwlib/src/stm32f10x_usart.c
copy to src/bare_test/4.Systick/stdlib/src/stm32f10x_usart.c
index a3f16f1..e794eae 100644
--- a/src/bare_test/stm32_key/fwlib/src/stm32f10x_usart.c
+++ b/src/bare_test/4.Systick/stdlib/src/stm32f10x_usart.c
@@ -1,1058 +1,1058 @@
-/**
- ******************************************************************************
- * @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 USART�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 USART�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 USART�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 USART�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 USART�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 USART�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 USART�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 USART�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****/
--
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