copy from src/bare_test/stm32_key/cmsis/system_stm32f10x.c
copy to src/bare_test/4.Systick/cmsis/system_stm32f10x.c
File was copied from src/bare_test/stm32_key/cmsis/system_stm32f10x.c |
| | |
| | | /**
|
| | | ******************************************************************************
|
| | | * @file system_stm32f10x.c
|
| | | * @author MCD Application Team
|
| | | * @version V3.5.0
|
| | | * @date 11-March-2011
|
| | | * @brief CMSIS Cortex-M3 Device Peripheral Access Layer System Source File.
|
| | | * |
| | | * 1. This file provides two functions and one global variable to be called from |
| | | * user application:
|
| | | * - SystemInit(): Setups the system clock (System clock source, PLL Multiplier
|
| | | * factors, AHB/APBx prescalers and Flash settings). |
| | | * This function is called at startup just after reset and |
| | | * before branch to main program. This call is made inside
|
| | | * the "startup_stm32f10x_xx.s" file.
|
| | | *
|
| | | * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
|
| | | * by the user application to setup the SysTick |
| | | * timer or configure other parameters.
|
| | | * |
| | | * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
|
| | | * be called whenever the core clock is changed
|
| | | * during program execution.
|
| | | *
|
| | | * 2. After each device reset the HSI (8 MHz) is used as system clock source.
|
| | | * Then SystemInit() function is called, in "startup_stm32f10x_xx.s" file, to
|
| | | * configure the system clock before to branch to main program.
|
| | | *
|
| | | * 3. If the system clock source selected by user fails to startup, the SystemInit()
|
| | | * function will do nothing and HSI still used as system clock source. User can |
| | | * add some code to deal with this issue inside the SetSysClock() function.
|
| | | *
|
| | | * 4. The default value of HSE crystal is set to 8 MHz (or 25 MHz, depedning on
|
| | | * the product used), refer to "HSE_VALUE" define in "stm32f10x.h" file. |
| | | * When HSE is used as system clock source, directly or through PLL, and you
|
| | | * are using different crystal you have to adapt the HSE value to your own
|
| | | * configuration.
|
| | | * |
| | | ******************************************************************************
|
| | | * @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>
|
| | | ******************************************************************************
|
| | | */
|
| | |
|
| | | /** @addtogroup CMSIS
|
| | | * @{
|
| | | */
|
| | |
|
| | | /** @addtogroup stm32f10x_system
|
| | | * @{
|
| | | */ |
| | | |
| | | /** @addtogroup STM32F10x_System_Private_Includes
|
| | | * @{
|
| | | */
|
| | |
|
| | | #include "stm32f10x.h"
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /** @addtogroup STM32F10x_System_Private_TypesDefinitions
|
| | | * @{
|
| | | */
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /** @addtogroup STM32F10x_System_Private_Defines
|
| | | * @{
|
| | | */
|
| | |
|
| | | /*!< Uncomment the line corresponding to the desired System clock (SYSCLK)
|
| | | frequency (after reset the HSI is used as SYSCLK source)
|
| | | |
| | | IMPORTANT NOTE:
|
| | | ============== |
| | | 1. After each device reset the HSI is used as System clock source.
|
| | |
|
| | | 2. Please make sure that the selected System clock doesn't exceed your device's
|
| | | maximum frequency.
|
| | | |
| | | 3. If none of the define below is enabled, the HSI is used as System clock
|
| | | source.
|
| | |
|
| | | 4. The System clock configuration functions provided within this file assume that:
|
| | | - For Low, Medium and High density Value line devices an external 8MHz |
| | | crystal is used to drive the System clock.
|
| | | - For Low, Medium and High density devices an external 8MHz crystal is
|
| | | used to drive the System clock.
|
| | | - For Connectivity line devices an external 25MHz crystal is used to drive
|
| | | the System clock.
|
| | | If you are using different crystal you have to adapt those functions accordingly.
|
| | | */
|
| | | |
| | | #if defined (STM32F10X_LD_VL) || (defined STM32F10X_MD_VL) || (defined STM32F10X_HD_VL)
|
| | | /* #define SYSCLK_FREQ_HSE HSE_VALUE */
|
| | | #define SYSCLK_FREQ_24MHz 24000000
|
| | | #else
|
| | | /* #define SYSCLK_FREQ_HSE HSE_VALUE */
|
| | | /* #define SYSCLK_FREQ_24MHz 24000000 */ |
| | | /* #define SYSCLK_FREQ_36MHz 36000000 */
|
| | | /* #define SYSCLK_FREQ_48MHz 48000000 */
|
| | | /* #define SYSCLK_FREQ_56MHz 56000000 */
|
| | | #define SYSCLK_FREQ_72MHz 72000000
|
| | | #endif
|
| | |
|
| | | /*!< Uncomment the following line if you need to use external SRAM mounted
|
| | | on STM3210E-EVAL board (STM32 High density and XL-density devices) or on |
| | | STM32100E-EVAL board (STM32 High-density value line devices) as data memory */ |
| | | #if defined (STM32F10X_HD) || (defined STM32F10X_XL) || (defined STM32F10X_HD_VL)
|
| | | /* #define DATA_IN_ExtSRAM */
|
| | | #endif
|
| | |
|
| | | /*!< Uncomment the following line if you need to relocate your vector Table in
|
| | | Internal SRAM. */ |
| | | /* #define VECT_TAB_SRAM */
|
| | | #define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field. |
| | | This value must be a multiple of 0x200. */
|
| | |
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /** @addtogroup STM32F10x_System_Private_Macros
|
| | | * @{
|
| | | */
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /** @addtogroup STM32F10x_System_Private_Variables
|
| | | * @{
|
| | | */
|
| | |
|
| | | /*******************************************************************************
|
| | | * Clock Definitions
|
| | | *******************************************************************************/
|
| | | #ifdef SYSCLK_FREQ_HSE
|
| | | uint32_t SystemCoreClock = SYSCLK_FREQ_HSE; /*!< System Clock Frequency (Core Clock) */
|
| | | #elif defined SYSCLK_FREQ_24MHz
|
| | | uint32_t SystemCoreClock = SYSCLK_FREQ_24MHz; /*!< System Clock Frequency (Core Clock) */
|
| | | #elif defined SYSCLK_FREQ_36MHz
|
| | | uint32_t SystemCoreClock = SYSCLK_FREQ_36MHz; /*!< System Clock Frequency (Core Clock) */
|
| | | #elif defined SYSCLK_FREQ_48MHz
|
| | | uint32_t SystemCoreClock = SYSCLK_FREQ_48MHz; /*!< System Clock Frequency (Core Clock) */
|
| | | #elif defined SYSCLK_FREQ_56MHz
|
| | | uint32_t SystemCoreClock = SYSCLK_FREQ_56MHz; /*!< System Clock Frequency (Core Clock) */
|
| | | #elif defined SYSCLK_FREQ_72MHz
|
| | | uint32_t SystemCoreClock = SYSCLK_FREQ_72MHz; /*!< System Clock Frequency (Core Clock) */
|
| | | #else /*!< HSI Selected as System Clock source */
|
| | | uint32_t SystemCoreClock = HSI_VALUE; /*!< System Clock Frequency (Core Clock) */
|
| | | #endif
|
| | |
|
| | | __I uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /** @addtogroup STM32F10x_System_Private_FunctionPrototypes
|
| | | * @{
|
| | | */
|
| | |
|
| | | static void SetSysClock(void);
|
| | |
|
| | | #ifdef SYSCLK_FREQ_HSE
|
| | | static void SetSysClockToHSE(void);
|
| | | #elif defined SYSCLK_FREQ_24MHz
|
| | | static void SetSysClockTo24(void);
|
| | | #elif defined SYSCLK_FREQ_36MHz
|
| | | static void SetSysClockTo36(void);
|
| | | #elif defined SYSCLK_FREQ_48MHz
|
| | | static void SetSysClockTo48(void);
|
| | | #elif defined SYSCLK_FREQ_56MHz
|
| | | static void SetSysClockTo56(void); |
| | | #elif defined SYSCLK_FREQ_72MHz
|
| | | static void SetSysClockTo72(void);
|
| | | #endif
|
| | |
|
| | | #ifdef DATA_IN_ExtSRAM
|
| | | static void SystemInit_ExtMemCtl(void); |
| | | #endif /* DATA_IN_ExtSRAM */
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /** @addtogroup STM32F10x_System_Private_Functions
|
| | | * @{
|
| | | */
|
| | |
|
| | | /**
|
| | | * @brief Setup the microcontroller system
|
| | | * Initialize the Embedded Flash Interface, the PLL and update the |
| | | * SystemCoreClock variable.
|
| | | * @note This function should be used only after reset.
|
| | | * @param None
|
| | | * @retval None
|
| | | */
|
| | | void SystemInit (void)
|
| | | {
|
| | | /* Reset the RCC clock configuration to the default reset state(for debug purpose) */
|
| | | /* Set HSION bit */
|
| | | RCC->CR |= (uint32_t)0x00000001;
|
| | |
|
| | | /* Reset SW, HPRE, PPRE1, PPRE2, ADCPRE and MCO bits */
|
| | | #ifndef STM32F10X_CL
|
| | | RCC->CFGR &= (uint32_t)0xF8FF0000;
|
| | | #else
|
| | | RCC->CFGR &= (uint32_t)0xF0FF0000;
|
| | | #endif /* STM32F10X_CL */ |
| | | |
| | | /* Reset HSEON, CSSON and PLLON bits */
|
| | | RCC->CR &= (uint32_t)0xFEF6FFFF;
|
| | |
|
| | | /* Reset HSEBYP bit */
|
| | | RCC->CR &= (uint32_t)0xFFFBFFFF;
|
| | |
|
| | | /* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE/OTGFSPRE bits */
|
| | | RCC->CFGR &= (uint32_t)0xFF80FFFF;
|
| | |
|
| | | #ifdef STM32F10X_CL
|
| | | /* Reset PLL2ON and PLL3ON bits */
|
| | | RCC->CR &= (uint32_t)0xEBFFFFFF;
|
| | |
|
| | | /* Disable all interrupts and clear pending bits */
|
| | | RCC->CIR = 0x00FF0000;
|
| | |
|
| | | /* Reset CFGR2 register */
|
| | | RCC->CFGR2 = 0x00000000;
|
| | | #elif defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || (defined STM32F10X_HD_VL)
|
| | | /* Disable all interrupts and clear pending bits */
|
| | | RCC->CIR = 0x009F0000;
|
| | |
|
| | | /* Reset CFGR2 register */
|
| | | RCC->CFGR2 = 0x00000000; |
| | | #else
|
| | | /* Disable all interrupts and clear pending bits */
|
| | | RCC->CIR = 0x009F0000;
|
| | | #endif /* STM32F10X_CL */
|
| | | |
| | | #if defined (STM32F10X_HD) || (defined STM32F10X_XL) || (defined STM32F10X_HD_VL)
|
| | | #ifdef DATA_IN_ExtSRAM
|
| | | SystemInit_ExtMemCtl(); |
| | | #endif /* DATA_IN_ExtSRAM */
|
| | | #endif |
| | |
|
| | | /* Configure the System clock frequency, HCLK, PCLK2 and PCLK1 prescalers */
|
| | | /* Configure the Flash Latency cycles and enable prefetch buffer */
|
| | | SetSysClock();
|
| | |
|
| | | #ifdef VECT_TAB_SRAM
|
| | | SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM. */
|
| | | #else
|
| | | SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH. */
|
| | | #endif |
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Update SystemCoreClock variable according to Clock Register Values.
|
| | | * The SystemCoreClock variable contains the core clock (HCLK), it can
|
| | | * be used by the user application to setup the SysTick timer or configure
|
| | | * other parameters.
|
| | | * |
| | | * @note Each time the core clock (HCLK) changes, this function must be called
|
| | | * to update SystemCoreClock variable value. Otherwise, any configuration
|
| | | * based on this variable will be incorrect. |
| | | * |
| | | * @note - The system frequency computed by this function is not the real |
| | | * frequency in the chip. It is calculated based on the predefined |
| | | * constant and the selected clock source:
|
| | | * |
| | | * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*)
|
| | | * |
| | | * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**)
|
| | | * |
| | | * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**) |
| | | * or HSI_VALUE(*) multiplied by the PLL factors.
|
| | | * |
| | | * (*) HSI_VALUE is a constant defined in stm32f1xx.h file (default value
|
| | | * 8 MHz) but the real value may vary depending on the variations
|
| | | * in voltage and temperature. |
| | | * |
| | | * (**) HSE_VALUE is a constant defined in stm32f1xx.h file (default value
|
| | | * 8 MHz or 25 MHz, depedning on the product used), user has to ensure
|
| | | * that HSE_VALUE is same as the real frequency of the crystal used.
|
| | | * Otherwise, this function may have wrong result.
|
| | | * |
| | | * - The result of this function could be not correct when using fractional
|
| | | * value for HSE crystal.
|
| | | * @param None
|
| | | * @retval None
|
| | | */
|
| | | void SystemCoreClockUpdate (void)
|
| | | {
|
| | | uint32_t tmp = 0, pllmull = 0, pllsource = 0;
|
| | |
|
| | | #ifdef STM32F10X_CL
|
| | | uint32_t prediv1source = 0, prediv1factor = 0, prediv2factor = 0, pll2mull = 0;
|
| | | #endif /* STM32F10X_CL */
|
| | |
|
| | | #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || (defined STM32F10X_HD_VL)
|
| | | uint32_t prediv1factor = 0;
|
| | | #endif /* STM32F10X_LD_VL or STM32F10X_MD_VL or STM32F10X_HD_VL */
|
| | | |
| | | /* Get SYSCLK source -------------------------------------------------------*/
|
| | | tmp = RCC->CFGR & RCC_CFGR_SWS;
|
| | | |
| | | switch (tmp)
|
| | | {
|
| | | case 0x00: /* HSI used as system clock */
|
| | | SystemCoreClock = HSI_VALUE;
|
| | | break;
|
| | | case 0x04: /* HSE used as system clock */
|
| | | SystemCoreClock = HSE_VALUE;
|
| | | break;
|
| | | case 0x08: /* PLL used as system clock */
|
| | |
|
| | | /* Get PLL clock source and multiplication factor ----------------------*/
|
| | | pllmull = RCC->CFGR & RCC_CFGR_PLLMULL;
|
| | | pllsource = RCC->CFGR & RCC_CFGR_PLLSRC;
|
| | | |
| | | #ifndef STM32F10X_CL |
| | | pllmull = ( pllmull >> 18) + 2;
|
| | | |
| | | if (pllsource == 0x00)
|
| | | {
|
| | | /* HSI oscillator clock divided by 2 selected as PLL clock entry */
|
| | | SystemCoreClock = (HSI_VALUE >> 1) * pllmull;
|
| | | }
|
| | | else
|
| | | {
|
| | | #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || (defined STM32F10X_HD_VL)
|
| | | prediv1factor = (RCC->CFGR2 & RCC_CFGR2_PREDIV1) + 1;
|
| | | /* HSE oscillator clock selected as PREDIV1 clock entry */
|
| | | SystemCoreClock = (HSE_VALUE / prediv1factor) * pllmull; |
| | | #else
|
| | | /* HSE selected as PLL clock entry */
|
| | | if ((RCC->CFGR & RCC_CFGR_PLLXTPRE) != (uint32_t)RESET)
|
| | | {/* HSE oscillator clock divided by 2 */
|
| | | SystemCoreClock = (HSE_VALUE >> 1) * pllmull;
|
| | | }
|
| | | else
|
| | | {
|
| | | SystemCoreClock = HSE_VALUE * pllmull;
|
| | | }
|
| | | #endif
|
| | | }
|
| | | #else
|
| | | pllmull = pllmull >> 18;
|
| | | |
| | | if (pllmull != 0x0D)
|
| | | {
|
| | | pllmull += 2;
|
| | | }
|
| | | else
|
| | | { /* PLL multiplication factor = PLL input clock * 6.5 */
|
| | | pllmull = 13 / 2; |
| | | }
|
| | | |
| | | if (pllsource == 0x00)
|
| | | {
|
| | | /* HSI oscillator clock divided by 2 selected as PLL clock entry */
|
| | | SystemCoreClock = (HSI_VALUE >> 1) * pllmull;
|
| | | }
|
| | | else
|
| | | {/* PREDIV1 selected as PLL clock entry */
|
| | | |
| | | /* Get PREDIV1 clock source and division factor */
|
| | | prediv1source = RCC->CFGR2 & RCC_CFGR2_PREDIV1SRC;
|
| | | prediv1factor = (RCC->CFGR2 & RCC_CFGR2_PREDIV1) + 1;
|
| | | |
| | | if (prediv1source == 0)
|
| | | { |
| | | /* HSE oscillator clock selected as PREDIV1 clock entry */
|
| | | SystemCoreClock = (HSE_VALUE / prediv1factor) * pllmull; |
| | | }
|
| | | else
|
| | | {/* PLL2 clock selected as PREDIV1 clock entry */
|
| | | |
| | | /* Get PREDIV2 division factor and PLL2 multiplication factor */
|
| | | prediv2factor = ((RCC->CFGR2 & RCC_CFGR2_PREDIV2) >> 4) + 1;
|
| | | pll2mull = ((RCC->CFGR2 & RCC_CFGR2_PLL2MUL) >> 8 ) + 2; |
| | | SystemCoreClock = (((HSE_VALUE / prediv2factor) * pll2mull) / prediv1factor) * pllmull; |
| | | }
|
| | | }
|
| | | #endif /* STM32F10X_CL */ |
| | | break;
|
| | |
|
| | | default:
|
| | | SystemCoreClock = HSI_VALUE;
|
| | | break;
|
| | | }
|
| | | |
| | | /* Compute HCLK clock frequency ----------------*/
|
| | | /* Get HCLK prescaler */
|
| | | tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)];
|
| | | /* HCLK clock frequency */
|
| | | SystemCoreClock >>= tmp; |
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Configures the System clock frequency, HCLK, PCLK2 and PCLK1 prescalers.
|
| | | * @param None
|
| | | * @retval None
|
| | | */
|
| | | static void SetSysClock(void)
|
| | | {
|
| | | #ifdef SYSCLK_FREQ_HSE
|
| | | SetSysClockToHSE();
|
| | | #elif defined SYSCLK_FREQ_24MHz
|
| | | SetSysClockTo24();
|
| | | #elif defined SYSCLK_FREQ_36MHz
|
| | | SetSysClockTo36();
|
| | | #elif defined SYSCLK_FREQ_48MHz
|
| | | SetSysClockTo48();
|
| | | #elif defined SYSCLK_FREQ_56MHz
|
| | | SetSysClockTo56(); |
| | | #elif defined SYSCLK_FREQ_72MHz
|
| | | SetSysClockTo72();
|
| | | #endif
|
| | | |
| | | /* If none of the define above is enabled, the HSI is used as System clock
|
| | | source (default after reset) */ |
| | | }
|
| | |
|
| | | /**
|
| | | * @brief Setup the external memory controller. Called in startup_stm32f10x.s |
| | | * before jump to __main
|
| | | * @param None
|
| | | * @retval None
|
| | | */ |
| | | #ifdef DATA_IN_ExtSRAM
|
| | | /**
|
| | | * @brief Setup the external memory controller. |
| | | * Called in startup_stm32f10x_xx.s/.c before jump to main.
|
| | | * This function configures the external SRAM mounted on STM3210E-EVAL
|
| | | * board (STM32 High density devices). This SRAM will be used as program
|
| | | * data memory (including heap and stack).
|
| | | * @param None
|
| | | * @retval None
|
| | | */ |
| | | void SystemInit_ExtMemCtl(void) |
| | | {
|
| | | /*!< FSMC Bank1 NOR/SRAM3 is used for the STM3210E-EVAL, if another Bank is |
| | | required, then adjust the Register Addresses */
|
| | |
|
| | | /* Enable FSMC clock */
|
| | | RCC->AHBENR = 0x00000114;
|
| | | |
| | | /* Enable GPIOD, GPIOE, GPIOF and GPIOG clocks */ |
| | | RCC->APB2ENR = 0x000001E0;
|
| | | |
| | | /* --------------- SRAM Data lines, NOE and NWE configuration ---------------*/
|
| | | /*---------------- SRAM Address lines configuration -------------------------*/
|
| | | /*---------------- NOE and NWE configuration --------------------------------*/ |
| | | /*---------------- NE3 configuration ----------------------------------------*/
|
| | | /*---------------- NBL0, NBL1 configuration ---------------------------------*/
|
| | | |
| | | GPIOD->CRL = 0x44BB44BB; |
| | | GPIOD->CRH = 0xBBBBBBBB;
|
| | |
|
| | | GPIOE->CRL = 0xB44444BB; |
| | | GPIOE->CRH = 0xBBBBBBBB;
|
| | |
|
| | | GPIOF->CRL = 0x44BBBBBB; |
| | | GPIOF->CRH = 0xBBBB4444;
|
| | |
|
| | | GPIOG->CRL = 0x44BBBBBB; |
| | | GPIOG->CRH = 0x44444B44;
|
| | | |
| | | /*---------------- FSMC Configuration ---------------------------------------*/ |
| | | /*---------------- Enable FSMC Bank1_SRAM Bank ------------------------------*/
|
| | | |
| | | FSMC_Bank1->BTCR[4] = 0x00001011;
|
| | | FSMC_Bank1->BTCR[5] = 0x00000200;
|
| | | }
|
| | | #endif /* DATA_IN_ExtSRAM */
|
| | |
|
| | | #ifdef SYSCLK_FREQ_HSE
|
| | | /**
|
| | | * @brief Selects HSE as System clock source and configure HCLK, PCLK2
|
| | | * and PCLK1 prescalers.
|
| | | * @note This function should be used only after reset.
|
| | | * @param None
|
| | | * @retval None
|
| | | */
|
| | | static void SetSysClockToHSE(void)
|
| | | {
|
| | | __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
|
| | | |
| | | /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/ |
| | | /* Enable HSE */ |
| | | RCC->CR |= ((uint32_t)RCC_CR_HSEON);
|
| | | |
| | | /* Wait till HSE is ready and if Time out is reached exit */
|
| | | do
|
| | | {
|
| | | HSEStatus = RCC->CR & RCC_CR_HSERDY;
|
| | | StartUpCounter++; |
| | | } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
|
| | |
|
| | | if ((RCC->CR & RCC_CR_HSERDY) != RESET)
|
| | | {
|
| | | HSEStatus = (uint32_t)0x01;
|
| | | }
|
| | | else
|
| | | {
|
| | | HSEStatus = (uint32_t)0x00;
|
| | | } |
| | |
|
| | | if (HSEStatus == (uint32_t)0x01)
|
| | | {
|
| | |
|
| | | #if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL && !defined STM32F10X_HD_VL
|
| | | /* Enable Prefetch Buffer */
|
| | | FLASH->ACR |= FLASH_ACR_PRFTBE;
|
| | |
|
| | | /* Flash 0 wait state */
|
| | | FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY);
|
| | |
|
| | | #ifndef STM32F10X_CL
|
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_0;
|
| | | #else
|
| | | if (HSE_VALUE <= 24000000)
|
| | | {
|
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_0;
|
| | | }
|
| | | else
|
| | | {
|
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_1;
|
| | | }
|
| | | #endif /* STM32F10X_CL */
|
| | | #endif
|
| | | |
| | | /* HCLK = SYSCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1;
|
| | | |
| | | /* PCLK2 = HCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1;
|
| | | |
| | | /* PCLK1 = HCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV1;
|
| | | |
| | | /* Select HSE as system clock source */
|
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW));
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_SW_HSE; |
| | |
|
| | | /* Wait till HSE is used as system clock source */
|
| | | while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)0x04)
|
| | | {
|
| | | }
|
| | | }
|
| | | else
|
| | | { /* If HSE fails to start-up, the application will have wrong clock |
| | | configuration. User can add here some code to deal with this error */
|
| | | } |
| | | }
|
| | | #elif defined SYSCLK_FREQ_24MHz
|
| | | /**
|
| | | * @brief Sets System clock frequency to 24MHz and configure HCLK, PCLK2 |
| | | * and PCLK1 prescalers.
|
| | | * @note This function should be used only after reset.
|
| | | * @param None
|
| | | * @retval None
|
| | | */
|
| | | static void SetSysClockTo24(void)
|
| | | {
|
| | | __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
|
| | | |
| | | /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/ |
| | | /* Enable HSE */ |
| | | RCC->CR |= ((uint32_t)RCC_CR_HSEON);
|
| | | |
| | | /* Wait till HSE is ready and if Time out is reached exit */
|
| | | do
|
| | | {
|
| | | HSEStatus = RCC->CR & RCC_CR_HSERDY;
|
| | | StartUpCounter++; |
| | | } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
|
| | |
|
| | | if ((RCC->CR & RCC_CR_HSERDY) != RESET)
|
| | | {
|
| | | HSEStatus = (uint32_t)0x01;
|
| | | }
|
| | | else
|
| | | {
|
| | | HSEStatus = (uint32_t)0x00;
|
| | | } |
| | |
|
| | | if (HSEStatus == (uint32_t)0x01)
|
| | | {
|
| | | #if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL && !defined STM32F10X_HD_VL |
| | | /* Enable Prefetch Buffer */
|
| | | FLASH->ACR |= FLASH_ACR_PRFTBE;
|
| | |
|
| | | /* Flash 0 wait state */
|
| | | FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY);
|
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_0; |
| | | #endif
|
| | | |
| | | /* HCLK = SYSCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1;
|
| | | |
| | | /* PCLK2 = HCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1;
|
| | | |
| | | /* PCLK1 = HCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV1;
|
| | | |
| | | #ifdef STM32F10X_CL
|
| | | /* Configure PLLs ------------------------------------------------------*/
|
| | | /* PLL configuration: PLLCLK = PREDIV1 * 6 = 24 MHz */ |
| | | RCC->CFGR &= (uint32_t)~(RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL);
|
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLXTPRE_PREDIV1 | RCC_CFGR_PLLSRC_PREDIV1 | |
| | | RCC_CFGR_PLLMULL6); |
| | |
|
| | | /* PLL2 configuration: PLL2CLK = (HSE / 5) * 8 = 40 MHz */
|
| | | /* PREDIV1 configuration: PREDIV1CLK = PLL2 / 10 = 4 MHz */ |
| | | RCC->CFGR2 &= (uint32_t)~(RCC_CFGR2_PREDIV2 | RCC_CFGR2_PLL2MUL |
|
| | | RCC_CFGR2_PREDIV1 | RCC_CFGR2_PREDIV1SRC);
|
| | | RCC->CFGR2 |= (uint32_t)(RCC_CFGR2_PREDIV2_DIV5 | RCC_CFGR2_PLL2MUL8 |
|
| | | RCC_CFGR2_PREDIV1SRC_PLL2 | RCC_CFGR2_PREDIV1_DIV10);
|
| | | |
| | | /* Enable PLL2 */
|
| | | RCC->CR |= RCC_CR_PLL2ON;
|
| | | /* Wait till PLL2 is ready */
|
| | | while((RCC->CR & RCC_CR_PLL2RDY) == 0)
|
| | | {
|
| | | } |
| | | #elif defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL)
|
| | | /* PLL configuration: = (HSE / 2) * 6 = 24 MHz */
|
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL));
|
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_PREDIV1 | RCC_CFGR_PLLXTPRE_PREDIV1_Div2 | RCC_CFGR_PLLMULL6);
|
| | | #else |
| | | /* PLL configuration: = (HSE / 2) * 6 = 24 MHz */
|
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL));
|
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSE | RCC_CFGR_PLLXTPRE_HSE_Div2 | RCC_CFGR_PLLMULL6);
|
| | | #endif /* STM32F10X_CL */
|
| | |
|
| | | /* Enable PLL */
|
| | | RCC->CR |= RCC_CR_PLLON;
|
| | |
|
| | | /* Wait till PLL is ready */
|
| | | while((RCC->CR & RCC_CR_PLLRDY) == 0)
|
| | | {
|
| | | }
|
| | |
|
| | | /* Select PLL as system clock source */
|
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW));
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_SW_PLL; |
| | |
|
| | | /* Wait till PLL is used as system clock source */
|
| | | while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)0x08)
|
| | | {
|
| | | }
|
| | | }
|
| | | else
|
| | | { /* If HSE fails to start-up, the application will have wrong clock |
| | | configuration. User can add here some code to deal with this error */
|
| | | } |
| | | }
|
| | | #elif defined SYSCLK_FREQ_36MHz
|
| | | /**
|
| | | * @brief Sets System clock frequency to 36MHz and configure HCLK, PCLK2 |
| | | * and PCLK1 prescalers. |
| | | * @note This function should be used only after reset.
|
| | | * @param None
|
| | | * @retval None
|
| | | */
|
| | | static void SetSysClockTo36(void)
|
| | | {
|
| | | __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
|
| | | |
| | | /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/ |
| | | /* Enable HSE */ |
| | | RCC->CR |= ((uint32_t)RCC_CR_HSEON);
|
| | | |
| | | /* Wait till HSE is ready and if Time out is reached exit */
|
| | | do
|
| | | {
|
| | | HSEStatus = RCC->CR & RCC_CR_HSERDY;
|
| | | StartUpCounter++; |
| | | } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
|
| | |
|
| | | if ((RCC->CR & RCC_CR_HSERDY) != RESET)
|
| | | {
|
| | | HSEStatus = (uint32_t)0x01;
|
| | | }
|
| | | else
|
| | | {
|
| | | HSEStatus = (uint32_t)0x00;
|
| | | } |
| | |
|
| | | if (HSEStatus == (uint32_t)0x01)
|
| | | {
|
| | | /* Enable Prefetch Buffer */
|
| | | FLASH->ACR |= FLASH_ACR_PRFTBE;
|
| | |
|
| | | /* Flash 1 wait state */
|
| | | FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY);
|
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_1; |
| | | |
| | | /* HCLK = SYSCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1;
|
| | | |
| | | /* PCLK2 = HCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1;
|
| | | |
| | | /* PCLK1 = HCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV1;
|
| | | |
| | | #ifdef STM32F10X_CL
|
| | | /* Configure PLLs ------------------------------------------------------*/
|
| | | |
| | | /* PLL configuration: PLLCLK = PREDIV1 * 9 = 36 MHz */ |
| | | RCC->CFGR &= (uint32_t)~(RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL);
|
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLXTPRE_PREDIV1 | RCC_CFGR_PLLSRC_PREDIV1 | |
| | | RCC_CFGR_PLLMULL9); |
| | |
|
| | | /*!< PLL2 configuration: PLL2CLK = (HSE / 5) * 8 = 40 MHz */
|
| | | /* PREDIV1 configuration: PREDIV1CLK = PLL2 / 10 = 4 MHz */
|
| | | |
| | | RCC->CFGR2 &= (uint32_t)~(RCC_CFGR2_PREDIV2 | RCC_CFGR2_PLL2MUL |
|
| | | RCC_CFGR2_PREDIV1 | RCC_CFGR2_PREDIV1SRC);
|
| | | RCC->CFGR2 |= (uint32_t)(RCC_CFGR2_PREDIV2_DIV5 | RCC_CFGR2_PLL2MUL8 |
|
| | | RCC_CFGR2_PREDIV1SRC_PLL2 | RCC_CFGR2_PREDIV1_DIV10);
|
| | | |
| | | /* Enable PLL2 */
|
| | | RCC->CR |= RCC_CR_PLL2ON;
|
| | | /* Wait till PLL2 is ready */
|
| | | while((RCC->CR & RCC_CR_PLL2RDY) == 0)
|
| | | {
|
| | | }
|
| | | |
| | | #else |
| | | /* PLL configuration: PLLCLK = (HSE / 2) * 9 = 36 MHz */
|
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL));
|
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSE | RCC_CFGR_PLLXTPRE_HSE_Div2 | RCC_CFGR_PLLMULL9);
|
| | | #endif /* STM32F10X_CL */
|
| | |
|
| | | /* Enable PLL */
|
| | | RCC->CR |= RCC_CR_PLLON;
|
| | |
|
| | | /* Wait till PLL is ready */
|
| | | while((RCC->CR & RCC_CR_PLLRDY) == 0)
|
| | | {
|
| | | }
|
| | |
|
| | | /* Select PLL as system clock source */
|
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW));
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_SW_PLL; |
| | |
|
| | | /* Wait till PLL is used as system clock source */
|
| | | while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)0x08)
|
| | | {
|
| | | }
|
| | | }
|
| | | else
|
| | | { /* If HSE fails to start-up, the application will have wrong clock |
| | | configuration. User can add here some code to deal with this error */
|
| | | } |
| | | }
|
| | | #elif defined SYSCLK_FREQ_48MHz
|
| | | /**
|
| | | * @brief Sets System clock frequency to 48MHz and configure HCLK, PCLK2 |
| | | * and PCLK1 prescalers. |
| | | * @note This function should be used only after reset.
|
| | | * @param None
|
| | | * @retval None
|
| | | */
|
| | | static void SetSysClockTo48(void)
|
| | | {
|
| | | __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
|
| | | |
| | | /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/ |
| | | /* Enable HSE */ |
| | | RCC->CR |= ((uint32_t)RCC_CR_HSEON);
|
| | | |
| | | /* Wait till HSE is ready and if Time out is reached exit */
|
| | | do
|
| | | {
|
| | | HSEStatus = RCC->CR & RCC_CR_HSERDY;
|
| | | StartUpCounter++; |
| | | } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
|
| | |
|
| | | if ((RCC->CR & RCC_CR_HSERDY) != RESET)
|
| | | {
|
| | | HSEStatus = (uint32_t)0x01;
|
| | | }
|
| | | else
|
| | | {
|
| | | HSEStatus = (uint32_t)0x00;
|
| | | } |
| | |
|
| | | if (HSEStatus == (uint32_t)0x01)
|
| | | {
|
| | | /* Enable Prefetch Buffer */
|
| | | FLASH->ACR |= FLASH_ACR_PRFTBE;
|
| | |
|
| | | /* Flash 1 wait state */
|
| | | FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY);
|
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_1; |
| | | |
| | | /* HCLK = SYSCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1;
|
| | | |
| | | /* PCLK2 = HCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1;
|
| | | |
| | | /* PCLK1 = HCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV2;
|
| | | |
| | | #ifdef STM32F10X_CL
|
| | | /* Configure PLLs ------------------------------------------------------*/
|
| | | /* PLL2 configuration: PLL2CLK = (HSE / 5) * 8 = 40 MHz */
|
| | | /* PREDIV1 configuration: PREDIV1CLK = PLL2 / 5 = 8 MHz */
|
| | | |
| | | RCC->CFGR2 &= (uint32_t)~(RCC_CFGR2_PREDIV2 | RCC_CFGR2_PLL2MUL |
|
| | | RCC_CFGR2_PREDIV1 | RCC_CFGR2_PREDIV1SRC);
|
| | | RCC->CFGR2 |= (uint32_t)(RCC_CFGR2_PREDIV2_DIV5 | RCC_CFGR2_PLL2MUL8 |
|
| | | RCC_CFGR2_PREDIV1SRC_PLL2 | RCC_CFGR2_PREDIV1_DIV5);
|
| | | |
| | | /* Enable PLL2 */
|
| | | RCC->CR |= RCC_CR_PLL2ON;
|
| | | /* Wait till PLL2 is ready */
|
| | | while((RCC->CR & RCC_CR_PLL2RDY) == 0)
|
| | | {
|
| | | }
|
| | | |
| | | |
| | | /* PLL configuration: PLLCLK = PREDIV1 * 6 = 48 MHz */ |
| | | RCC->CFGR &= (uint32_t)~(RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL);
|
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLXTPRE_PREDIV1 | RCC_CFGR_PLLSRC_PREDIV1 | |
| | | RCC_CFGR_PLLMULL6); |
| | | #else |
| | | /* PLL configuration: PLLCLK = HSE * 6 = 48 MHz */
|
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL));
|
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSE | RCC_CFGR_PLLMULL6);
|
| | | #endif /* STM32F10X_CL */
|
| | |
|
| | | /* Enable PLL */
|
| | | RCC->CR |= RCC_CR_PLLON;
|
| | |
|
| | | /* Wait till PLL is ready */
|
| | | while((RCC->CR & RCC_CR_PLLRDY) == 0)
|
| | | {
|
| | | }
|
| | |
|
| | | /* Select PLL as system clock source */
|
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW));
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_SW_PLL; |
| | |
|
| | | /* Wait till PLL is used as system clock source */
|
| | | while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)0x08)
|
| | | {
|
| | | }
|
| | | }
|
| | | else
|
| | | { /* If HSE fails to start-up, the application will have wrong clock |
| | | configuration. User can add here some code to deal with this error */
|
| | | } |
| | | }
|
| | |
|
| | | #elif defined SYSCLK_FREQ_56MHz
|
| | | /**
|
| | | * @brief Sets System clock frequency to 56MHz and configure HCLK, PCLK2 |
| | | * and PCLK1 prescalers. |
| | | * @note This function should be used only after reset.
|
| | | * @param None
|
| | | * @retval None
|
| | | */
|
| | | static void SetSysClockTo56(void)
|
| | | {
|
| | | __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
|
| | | |
| | | /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/ |
| | | /* Enable HSE */ |
| | | RCC->CR |= ((uint32_t)RCC_CR_HSEON);
|
| | | |
| | | /* Wait till HSE is ready and if Time out is reached exit */
|
| | | do
|
| | | {
|
| | | HSEStatus = RCC->CR & RCC_CR_HSERDY;
|
| | | StartUpCounter++; |
| | | } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
|
| | |
|
| | | if ((RCC->CR & RCC_CR_HSERDY) != RESET)
|
| | | {
|
| | | HSEStatus = (uint32_t)0x01;
|
| | | }
|
| | | else
|
| | | {
|
| | | HSEStatus = (uint32_t)0x00;
|
| | | } |
| | |
|
| | | if (HSEStatus == (uint32_t)0x01)
|
| | | {
|
| | | /* Enable Prefetch Buffer */
|
| | | FLASH->ACR |= FLASH_ACR_PRFTBE;
|
| | |
|
| | | /* Flash 2 wait state */
|
| | | FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY);
|
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_2; |
| | | |
| | | /* HCLK = SYSCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1;
|
| | | |
| | | /* PCLK2 = HCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1;
|
| | | |
| | | /* PCLK1 = HCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV2;
|
| | |
|
| | | #ifdef STM32F10X_CL
|
| | | /* Configure PLLs ------------------------------------------------------*/
|
| | | /* PLL2 configuration: PLL2CLK = (HSE / 5) * 8 = 40 MHz */
|
| | | /* PREDIV1 configuration: PREDIV1CLK = PLL2 / 5 = 8 MHz */
|
| | | |
| | | RCC->CFGR2 &= (uint32_t)~(RCC_CFGR2_PREDIV2 | RCC_CFGR2_PLL2MUL |
|
| | | RCC_CFGR2_PREDIV1 | RCC_CFGR2_PREDIV1SRC);
|
| | | RCC->CFGR2 |= (uint32_t)(RCC_CFGR2_PREDIV2_DIV5 | RCC_CFGR2_PLL2MUL8 |
|
| | | RCC_CFGR2_PREDIV1SRC_PLL2 | RCC_CFGR2_PREDIV1_DIV5);
|
| | | |
| | | /* Enable PLL2 */
|
| | | RCC->CR |= RCC_CR_PLL2ON;
|
| | | /* Wait till PLL2 is ready */
|
| | | while((RCC->CR & RCC_CR_PLL2RDY) == 0)
|
| | | {
|
| | | }
|
| | | |
| | | |
| | | /* PLL configuration: PLLCLK = PREDIV1 * 7 = 56 MHz */ |
| | | RCC->CFGR &= (uint32_t)~(RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL);
|
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLXTPRE_PREDIV1 | RCC_CFGR_PLLSRC_PREDIV1 | |
| | | RCC_CFGR_PLLMULL7); |
| | | #else |
| | | /* PLL configuration: PLLCLK = HSE * 7 = 56 MHz */
|
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL));
|
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSE | RCC_CFGR_PLLMULL7);
|
| | |
|
| | | #endif /* STM32F10X_CL */
|
| | |
|
| | | /* Enable PLL */
|
| | | RCC->CR |= RCC_CR_PLLON;
|
| | |
|
| | | /* Wait till PLL is ready */
|
| | | while((RCC->CR & RCC_CR_PLLRDY) == 0)
|
| | | {
|
| | | }
|
| | |
|
| | | /* Select PLL as system clock source */
|
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW));
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_SW_PLL; |
| | |
|
| | | /* Wait till PLL is used as system clock source */
|
| | | while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)0x08)
|
| | | {
|
| | | }
|
| | | }
|
| | | else
|
| | | { /* If HSE fails to start-up, the application will have wrong clock |
| | | configuration. User can add here some code to deal with this error */
|
| | | } |
| | | }
|
| | |
|
| | | #elif defined SYSCLK_FREQ_72MHz
|
| | | /**
|
| | | * @brief Sets System clock frequency to 72MHz and configure HCLK, PCLK2 |
| | | * and PCLK1 prescalers. |
| | | * @note This function should be used only after reset.
|
| | | * @param None
|
| | | * @retval None
|
| | | */
|
| | | static void SetSysClockTo72(void)
|
| | | {
|
| | | __IO uint32_t StartUpCounter = 0, HSEStatus = 0;
|
| | | |
| | | /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/ |
| | | /* Enable HSE */ |
| | | RCC->CR |= ((uint32_t)RCC_CR_HSEON);
|
| | | |
| | | /* Wait till HSE is ready and if Time out is reached exit */
|
| | | do
|
| | | {
|
| | | HSEStatus = RCC->CR & RCC_CR_HSERDY;
|
| | | StartUpCounter++; |
| | | } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));
|
| | |
|
| | | if ((RCC->CR & RCC_CR_HSERDY) != RESET)
|
| | | {
|
| | | HSEStatus = (uint32_t)0x01;
|
| | | }
|
| | | else
|
| | | {
|
| | | HSEStatus = (uint32_t)0x00;
|
| | | } |
| | |
|
| | | if (HSEStatus == (uint32_t)0x01)
|
| | | {
|
| | | /* Enable Prefetch Buffer */
|
| | | FLASH->ACR |= FLASH_ACR_PRFTBE;
|
| | |
|
| | | /* Flash 2 wait state */
|
| | | FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY);
|
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_2; |
| | |
|
| | | |
| | | /* HCLK = SYSCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1;
|
| | | |
| | | /* PCLK2 = HCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1;
|
| | | |
| | | /* PCLK1 = HCLK */
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV2;
|
| | |
|
| | | #ifdef STM32F10X_CL
|
| | | /* Configure PLLs ------------------------------------------------------*/
|
| | | /* PLL2 configuration: PLL2CLK = (HSE / 5) * 8 = 40 MHz */
|
| | | /* PREDIV1 configuration: PREDIV1CLK = PLL2 / 5 = 8 MHz */
|
| | | |
| | | RCC->CFGR2 &= (uint32_t)~(RCC_CFGR2_PREDIV2 | RCC_CFGR2_PLL2MUL |
|
| | | RCC_CFGR2_PREDIV1 | RCC_CFGR2_PREDIV1SRC);
|
| | | RCC->CFGR2 |= (uint32_t)(RCC_CFGR2_PREDIV2_DIV5 | RCC_CFGR2_PLL2MUL8 |
|
| | | RCC_CFGR2_PREDIV1SRC_PLL2 | RCC_CFGR2_PREDIV1_DIV5);
|
| | | |
| | | /* Enable PLL2 */
|
| | | RCC->CR |= RCC_CR_PLL2ON;
|
| | | /* Wait till PLL2 is ready */
|
| | | while((RCC->CR & RCC_CR_PLL2RDY) == 0)
|
| | | {
|
| | | }
|
| | | |
| | | |
| | | /* PLL configuration: PLLCLK = PREDIV1 * 9 = 72 MHz */ |
| | | RCC->CFGR &= (uint32_t)~(RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL);
|
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLXTPRE_PREDIV1 | RCC_CFGR_PLLSRC_PREDIV1 | |
| | | RCC_CFGR_PLLMULL9); |
| | | #else |
| | | /* PLL configuration: PLLCLK = HSE * 9 = 72 MHz */
|
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE |
|
| | | RCC_CFGR_PLLMULL));
|
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSE | RCC_CFGR_PLLMULL9);
|
| | | #endif /* STM32F10X_CL */
|
| | |
|
| | | /* Enable PLL */
|
| | | RCC->CR |= RCC_CR_PLLON;
|
| | |
|
| | | /* Wait till PLL is ready */
|
| | | while((RCC->CR & RCC_CR_PLLRDY) == 0)
|
| | | {
|
| | | }
|
| | | |
| | | /* Select PLL as system clock source */
|
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW));
|
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_SW_PLL; |
| | |
|
| | | /* Wait till PLL is used as system clock source */
|
| | | while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)0x08)
|
| | | {
|
| | | }
|
| | | }
|
| | | else
|
| | | { /* If HSE fails to start-up, the application will have wrong clock |
| | | configuration. User can add here some code to deal with this error */
|
| | | }
|
| | | }
|
| | | #endif
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | |
|
| | | /**
|
| | | * @}
|
| | | */
|
| | | |
| | | /**
|
| | | * @}
|
| | | */ |
| | | /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
|
| | | /** |
| | | ****************************************************************************** |
| | | * @file system_stm32f10x.c |
| | | * @author MCD Application Team |
| | | * @version V3.5.0 |
| | | * @date 11-March-2011 |
| | | * @brief CMSIS Cortex-M3 Device Peripheral Access Layer System Source File. |
| | | * |
| | | * 1. This file provides two functions and one global variable to be called from |
| | | * user application: |
| | | * - SystemInit(): Setups the system clock (System clock source, PLL Multiplier |
| | | * factors, AHB/APBx prescalers and Flash settings). |
| | | * This function is called at startup just after reset and |
| | | * before branch to main program. This call is made inside |
| | | * the "startup_stm32f10x_xx.s" file. |
| | | * |
| | | * - SystemCoreClock variable: Contains the core clock (HCLK), it can be used |
| | | * by the user application to setup the SysTick |
| | | * timer or configure other parameters. |
| | | * |
| | | * - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must |
| | | * be called whenever the core clock is changed |
| | | * during program execution. |
| | | * |
| | | * 2. After each device reset the HSI (8 MHz) is used as system clock source. |
| | | * Then SystemInit() function is called, in "startup_stm32f10x_xx.s" file, to |
| | | * configure the system clock before to branch to main program. |
| | | * |
| | | * 3. If the system clock source selected by user fails to startup, the SystemInit() |
| | | * function will do nothing and HSI still used as system clock source. User can |
| | | * add some code to deal with this issue inside the SetSysClock() function. |
| | | * |
| | | * 4. The default value of HSE crystal is set to 8 MHz (or 25 MHz, depedning on |
| | | * the product used), refer to "HSE_VALUE" define in "stm32f10x.h" file. |
| | | * When HSE is used as system clock source, directly or through PLL, and you |
| | | * are using different crystal you have to adapt the HSE value to your own |
| | | * configuration. |
| | | * |
| | | ****************************************************************************** |
| | | * @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> |
| | | ****************************************************************************** |
| | | */ |
| | | |
| | | /** @addtogroup CMSIS |
| | | * @{ |
| | | */ |
| | | |
| | | /** @addtogroup stm32f10x_system |
| | | * @{ |
| | | */ |
| | | |
| | | /** @addtogroup STM32F10x_System_Private_Includes |
| | | * @{ |
| | | */ |
| | | |
| | | #include "stm32f10x.h" |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** @addtogroup STM32F10x_System_Private_TypesDefinitions |
| | | * @{ |
| | | */ |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** @addtogroup STM32F10x_System_Private_Defines |
| | | * @{ |
| | | */ |
| | | |
| | | /*!< Uncomment the line corresponding to the desired System clock (SYSCLK) |
| | | frequency (after reset the HSI is used as SYSCLK source) |
| | | |
| | | IMPORTANT NOTE: |
| | | ============== |
| | | 1. After each device reset the HSI is used as System clock source. |
| | | |
| | | 2. Please make sure that the selected System clock doesn't exceed your device's |
| | | maximum frequency. |
| | | |
| | | 3. If none of the define below is enabled, the HSI is used as System clock |
| | | source. |
| | | |
| | | 4. The System clock configuration functions provided within this file assume that: |
| | | - For Low, Medium and High density Value line devices an external 8MHz |
| | | crystal is used to drive the System clock. |
| | | - For Low, Medium and High density devices an external 8MHz crystal is |
| | | used to drive the System clock. |
| | | - For Connectivity line devices an external 25MHz crystal is used to drive |
| | | the System clock. |
| | | If you are using different crystal you have to adapt those functions accordingly. |
| | | */ |
| | | |
| | | #if defined (STM32F10X_LD_VL) || (defined STM32F10X_MD_VL) || (defined STM32F10X_HD_VL) |
| | | /* #define SYSCLK_FREQ_HSE HSE_VALUE */ |
| | | #define SYSCLK_FREQ_24MHz 24000000 |
| | | #else |
| | | /* #define SYSCLK_FREQ_HSE HSE_VALUE */ |
| | | /* #define SYSCLK_FREQ_24MHz 24000000 */ |
| | | /* #define SYSCLK_FREQ_36MHz 36000000 */ |
| | | /* #define SYSCLK_FREQ_48MHz 48000000 */ |
| | | /* #define SYSCLK_FREQ_56MHz 56000000 */ |
| | | #define SYSCLK_FREQ_72MHz 72000000 |
| | | #endif |
| | | |
| | | /*!< Uncomment the following line if you need to use external SRAM mounted |
| | | on STM3210E-EVAL board (STM32 High density and XL-density devices) or on |
| | | STM32100E-EVAL board (STM32 High-density value line devices) as data memory */ |
| | | #if defined (STM32F10X_HD) || (defined STM32F10X_XL) || (defined STM32F10X_HD_VL) |
| | | /* #define DATA_IN_ExtSRAM */ |
| | | #endif |
| | | |
| | | /*!< Uncomment the following line if you need to relocate your vector Table in |
| | | Internal SRAM. */ |
| | | /* #define VECT_TAB_SRAM */ |
| | | #define VECT_TAB_OFFSET 0x0 /*!< Vector Table base offset field. |
| | | This value must be a multiple of 0x200. */ |
| | | |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** @addtogroup STM32F10x_System_Private_Macros |
| | | * @{ |
| | | */ |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** @addtogroup STM32F10x_System_Private_Variables |
| | | * @{ |
| | | */ |
| | | |
| | | /******************************************************************************* |
| | | * Clock Definitions |
| | | *******************************************************************************/ |
| | | #ifdef SYSCLK_FREQ_HSE |
| | | uint32_t SystemCoreClock = SYSCLK_FREQ_HSE; /*!< System Clock Frequency (Core Clock) */ |
| | | #elif defined SYSCLK_FREQ_24MHz |
| | | uint32_t SystemCoreClock = SYSCLK_FREQ_24MHz; /*!< System Clock Frequency (Core Clock) */ |
| | | #elif defined SYSCLK_FREQ_36MHz |
| | | uint32_t SystemCoreClock = SYSCLK_FREQ_36MHz; /*!< System Clock Frequency (Core Clock) */ |
| | | #elif defined SYSCLK_FREQ_48MHz |
| | | uint32_t SystemCoreClock = SYSCLK_FREQ_48MHz; /*!< System Clock Frequency (Core Clock) */ |
| | | #elif defined SYSCLK_FREQ_56MHz |
| | | uint32_t SystemCoreClock = SYSCLK_FREQ_56MHz; /*!< System Clock Frequency (Core Clock) */ |
| | | #elif defined SYSCLK_FREQ_72MHz |
| | | uint32_t SystemCoreClock = SYSCLK_FREQ_72MHz; /*!< System Clock Frequency (Core Clock) */ |
| | | #else /*!< HSI Selected as System Clock source */ |
| | | uint32_t SystemCoreClock = HSI_VALUE; /*!< System Clock Frequency (Core Clock) */ |
| | | #endif |
| | | |
| | | __I uint8_t AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9}; |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** @addtogroup STM32F10x_System_Private_FunctionPrototypes |
| | | * @{ |
| | | */ |
| | | |
| | | static void SetSysClock(void); |
| | | |
| | | #ifdef SYSCLK_FREQ_HSE |
| | | static void SetSysClockToHSE(void); |
| | | #elif defined SYSCLK_FREQ_24MHz |
| | | static void SetSysClockTo24(void); |
| | | #elif defined SYSCLK_FREQ_36MHz |
| | | static void SetSysClockTo36(void); |
| | | #elif defined SYSCLK_FREQ_48MHz |
| | | static void SetSysClockTo48(void); |
| | | #elif defined SYSCLK_FREQ_56MHz |
| | | static void SetSysClockTo56(void); |
| | | #elif defined SYSCLK_FREQ_72MHz |
| | | static void SetSysClockTo72(void); |
| | | #endif |
| | | |
| | | #ifdef DATA_IN_ExtSRAM |
| | | static void SystemInit_ExtMemCtl(void); |
| | | #endif /* DATA_IN_ExtSRAM */ |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** @addtogroup STM32F10x_System_Private_Functions |
| | | * @{ |
| | | */ |
| | | |
| | | /** |
| | | * @brief Setup the microcontroller system |
| | | * Initialize the Embedded Flash Interface, the PLL and update the |
| | | * SystemCoreClock variable. |
| | | * @note This function should be used only after reset. |
| | | * @param None |
| | | * @retval None |
| | | */ |
| | | void SystemInit (void) |
| | | { |
| | | /* Reset the RCC clock configuration to the default reset state(for debug purpose) */ |
| | | /* Set HSION bit */ |
| | | RCC->CR |= (uint32_t)0x00000001; |
| | | |
| | | /* Reset SW, HPRE, PPRE1, PPRE2, ADCPRE and MCO bits */ |
| | | #ifndef STM32F10X_CL |
| | | RCC->CFGR &= (uint32_t)0xF8FF0000; |
| | | #else |
| | | RCC->CFGR &= (uint32_t)0xF0FF0000; |
| | | #endif /* STM32F10X_CL */ |
| | | |
| | | /* Reset HSEON, CSSON and PLLON bits */ |
| | | RCC->CR &= (uint32_t)0xFEF6FFFF; |
| | | |
| | | /* Reset HSEBYP bit */ |
| | | RCC->CR &= (uint32_t)0xFFFBFFFF; |
| | | |
| | | /* Reset PLLSRC, PLLXTPRE, PLLMUL and USBPRE/OTGFSPRE bits */ |
| | | RCC->CFGR &= (uint32_t)0xFF80FFFF; |
| | | |
| | | #ifdef STM32F10X_CL |
| | | /* Reset PLL2ON and PLL3ON bits */ |
| | | RCC->CR &= (uint32_t)0xEBFFFFFF; |
| | | |
| | | /* Disable all interrupts and clear pending bits */ |
| | | RCC->CIR = 0x00FF0000; |
| | | |
| | | /* Reset CFGR2 register */ |
| | | RCC->CFGR2 = 0x00000000; |
| | | #elif defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || (defined STM32F10X_HD_VL) |
| | | /* Disable all interrupts and clear pending bits */ |
| | | RCC->CIR = 0x009F0000; |
| | | |
| | | /* Reset CFGR2 register */ |
| | | RCC->CFGR2 = 0x00000000; |
| | | #else |
| | | /* Disable all interrupts and clear pending bits */ |
| | | RCC->CIR = 0x009F0000; |
| | | #endif /* STM32F10X_CL */ |
| | | |
| | | #if defined (STM32F10X_HD) || (defined STM32F10X_XL) || (defined STM32F10X_HD_VL) |
| | | #ifdef DATA_IN_ExtSRAM |
| | | SystemInit_ExtMemCtl(); |
| | | #endif /* DATA_IN_ExtSRAM */ |
| | | #endif |
| | | |
| | | /* Configure the System clock frequency, HCLK, PCLK2 and PCLK1 prescalers */ |
| | | /* Configure the Flash Latency cycles and enable prefetch buffer */ |
| | | SetSysClock(); |
| | | |
| | | #ifdef VECT_TAB_SRAM |
| | | SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM. */ |
| | | #else |
| | | SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH. */ |
| | | #endif |
| | | } |
| | | |
| | | /** |
| | | * @brief Update SystemCoreClock variable according to Clock Register Values. |
| | | * The SystemCoreClock variable contains the core clock (HCLK), it can |
| | | * be used by the user application to setup the SysTick timer or configure |
| | | * other parameters. |
| | | * |
| | | * @note Each time the core clock (HCLK) changes, this function must be called |
| | | * to update SystemCoreClock variable value. Otherwise, any configuration |
| | | * based on this variable will be incorrect. |
| | | * |
| | | * @note - The system frequency computed by this function is not the real |
| | | * frequency in the chip. It is calculated based on the predefined |
| | | * constant and the selected clock source: |
| | | * |
| | | * - If SYSCLK source is HSI, SystemCoreClock will contain the HSI_VALUE(*) |
| | | * |
| | | * - If SYSCLK source is HSE, SystemCoreClock will contain the HSE_VALUE(**) |
| | | * |
| | | * - If SYSCLK source is PLL, SystemCoreClock will contain the HSE_VALUE(**) |
| | | * or HSI_VALUE(*) multiplied by the PLL factors. |
| | | * |
| | | * (*) HSI_VALUE is a constant defined in stm32f1xx.h file (default value |
| | | * 8 MHz) but the real value may vary depending on the variations |
| | | * in voltage and temperature. |
| | | * |
| | | * (**) HSE_VALUE is a constant defined in stm32f1xx.h file (default value |
| | | * 8 MHz or 25 MHz, depedning on the product used), user has to ensure |
| | | * that HSE_VALUE is same as the real frequency of the crystal used. |
| | | * Otherwise, this function may have wrong result. |
| | | * |
| | | * - The result of this function could be not correct when using fractional |
| | | * value for HSE crystal. |
| | | * @param None |
| | | * @retval None |
| | | */ |
| | | void SystemCoreClockUpdate (void) |
| | | { |
| | | uint32_t tmp = 0, pllmull = 0, pllsource = 0; |
| | | |
| | | #ifdef STM32F10X_CL |
| | | uint32_t prediv1source = 0, prediv1factor = 0, prediv2factor = 0, pll2mull = 0; |
| | | #endif /* STM32F10X_CL */ |
| | | |
| | | #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || (defined STM32F10X_HD_VL) |
| | | uint32_t prediv1factor = 0; |
| | | #endif /* STM32F10X_LD_VL or STM32F10X_MD_VL or STM32F10X_HD_VL */ |
| | | |
| | | /* Get SYSCLK source -------------------------------------------------------*/ |
| | | tmp = RCC->CFGR & RCC_CFGR_SWS; |
| | | |
| | | switch (tmp) |
| | | { |
| | | case 0x00: /* HSI used as system clock */ |
| | | SystemCoreClock = HSI_VALUE; |
| | | break; |
| | | case 0x04: /* HSE used as system clock */ |
| | | SystemCoreClock = HSE_VALUE; |
| | | break; |
| | | case 0x08: /* PLL used as system clock */ |
| | | |
| | | /* Get PLL clock source and multiplication factor ----------------------*/ |
| | | pllmull = RCC->CFGR & RCC_CFGR_PLLMULL; |
| | | pllsource = RCC->CFGR & RCC_CFGR_PLLSRC; |
| | | |
| | | #ifndef STM32F10X_CL |
| | | pllmull = ( pllmull >> 18) + 2; |
| | | |
| | | if (pllsource == 0x00) |
| | | { |
| | | /* HSI oscillator clock divided by 2 selected as PLL clock entry */ |
| | | SystemCoreClock = (HSI_VALUE >> 1) * pllmull; |
| | | } |
| | | else |
| | | { |
| | | #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || (defined STM32F10X_HD_VL) |
| | | prediv1factor = (RCC->CFGR2 & RCC_CFGR2_PREDIV1) + 1; |
| | | /* HSE oscillator clock selected as PREDIV1 clock entry */ |
| | | SystemCoreClock = (HSE_VALUE / prediv1factor) * pllmull; |
| | | #else |
| | | /* HSE selected as PLL clock entry */ |
| | | if ((RCC->CFGR & RCC_CFGR_PLLXTPRE) != (uint32_t)RESET) |
| | | {/* HSE oscillator clock divided by 2 */ |
| | | SystemCoreClock = (HSE_VALUE >> 1) * pllmull; |
| | | } |
| | | else |
| | | { |
| | | SystemCoreClock = HSE_VALUE * pllmull; |
| | | } |
| | | #endif |
| | | } |
| | | #else |
| | | pllmull = pllmull >> 18; |
| | | |
| | | if (pllmull != 0x0D) |
| | | { |
| | | pllmull += 2; |
| | | } |
| | | else |
| | | { /* PLL multiplication factor = PLL input clock * 6.5 */ |
| | | pllmull = 13 / 2; |
| | | } |
| | | |
| | | if (pllsource == 0x00) |
| | | { |
| | | /* HSI oscillator clock divided by 2 selected as PLL clock entry */ |
| | | SystemCoreClock = (HSI_VALUE >> 1) * pllmull; |
| | | } |
| | | else |
| | | {/* PREDIV1 selected as PLL clock entry */ |
| | | |
| | | /* Get PREDIV1 clock source and division factor */ |
| | | prediv1source = RCC->CFGR2 & RCC_CFGR2_PREDIV1SRC; |
| | | prediv1factor = (RCC->CFGR2 & RCC_CFGR2_PREDIV1) + 1; |
| | | |
| | | if (prediv1source == 0) |
| | | { |
| | | /* HSE oscillator clock selected as PREDIV1 clock entry */ |
| | | SystemCoreClock = (HSE_VALUE / prediv1factor) * pllmull; |
| | | } |
| | | else |
| | | {/* PLL2 clock selected as PREDIV1 clock entry */ |
| | | |
| | | /* Get PREDIV2 division factor and PLL2 multiplication factor */ |
| | | prediv2factor = ((RCC->CFGR2 & RCC_CFGR2_PREDIV2) >> 4) + 1; |
| | | pll2mull = ((RCC->CFGR2 & RCC_CFGR2_PLL2MUL) >> 8 ) + 2; |
| | | SystemCoreClock = (((HSE_VALUE / prediv2factor) * pll2mull) / prediv1factor) * pllmull; |
| | | } |
| | | } |
| | | #endif /* STM32F10X_CL */ |
| | | break; |
| | | |
| | | default: |
| | | SystemCoreClock = HSI_VALUE; |
| | | break; |
| | | } |
| | | |
| | | /* Compute HCLK clock frequency ----------------*/ |
| | | /* Get HCLK prescaler */ |
| | | tmp = AHBPrescTable[((RCC->CFGR & RCC_CFGR_HPRE) >> 4)]; |
| | | /* HCLK clock frequency */ |
| | | SystemCoreClock >>= tmp; |
| | | } |
| | | |
| | | /** |
| | | * @brief Configures the System clock frequency, HCLK, PCLK2 and PCLK1 prescalers. |
| | | * @param None |
| | | * @retval None |
| | | */ |
| | | static void SetSysClock(void) |
| | | { |
| | | #ifdef SYSCLK_FREQ_HSE |
| | | SetSysClockToHSE(); |
| | | #elif defined SYSCLK_FREQ_24MHz |
| | | SetSysClockTo24(); |
| | | #elif defined SYSCLK_FREQ_36MHz |
| | | SetSysClockTo36(); |
| | | #elif defined SYSCLK_FREQ_48MHz |
| | | SetSysClockTo48(); |
| | | #elif defined SYSCLK_FREQ_56MHz |
| | | SetSysClockTo56(); |
| | | #elif defined SYSCLK_FREQ_72MHz |
| | | SetSysClockTo72(); |
| | | #endif |
| | | |
| | | /* If none of the define above is enabled, the HSI is used as System clock |
| | | source (default after reset) */ |
| | | } |
| | | |
| | | /** |
| | | * @brief Setup the external memory controller. Called in startup_stm32f10x.s |
| | | * before jump to __main |
| | | * @param None |
| | | * @retval None |
| | | */ |
| | | #ifdef DATA_IN_ExtSRAM |
| | | /** |
| | | * @brief Setup the external memory controller. |
| | | * Called in startup_stm32f10x_xx.s/.c before jump to main. |
| | | * This function configures the external SRAM mounted on STM3210E-EVAL |
| | | * board (STM32 High density devices). This SRAM will be used as program |
| | | * data memory (including heap and stack). |
| | | * @param None |
| | | * @retval None |
| | | */ |
| | | void SystemInit_ExtMemCtl(void) |
| | | { |
| | | /*!< FSMC Bank1 NOR/SRAM3 is used for the STM3210E-EVAL, if another Bank is |
| | | required, then adjust the Register Addresses */ |
| | | |
| | | /* Enable FSMC clock */ |
| | | RCC->AHBENR = 0x00000114; |
| | | |
| | | /* Enable GPIOD, GPIOE, GPIOF and GPIOG clocks */ |
| | | RCC->APB2ENR = 0x000001E0; |
| | | |
| | | /* --------------- SRAM Data lines, NOE and NWE configuration ---------------*/ |
| | | /*---------------- SRAM Address lines configuration -------------------------*/ |
| | | /*---------------- NOE and NWE configuration --------------------------------*/ |
| | | /*---------------- NE3 configuration ----------------------------------------*/ |
| | | /*---------------- NBL0, NBL1 configuration ---------------------------------*/ |
| | | |
| | | GPIOD->CRL = 0x44BB44BB; |
| | | GPIOD->CRH = 0xBBBBBBBB; |
| | | |
| | | GPIOE->CRL = 0xB44444BB; |
| | | GPIOE->CRH = 0xBBBBBBBB; |
| | | |
| | | GPIOF->CRL = 0x44BBBBBB; |
| | | GPIOF->CRH = 0xBBBB4444; |
| | | |
| | | GPIOG->CRL = 0x44BBBBBB; |
| | | GPIOG->CRH = 0x44444B44; |
| | | |
| | | /*---------------- FSMC Configuration ---------------------------------------*/ |
| | | /*---------------- Enable FSMC Bank1_SRAM Bank ------------------------------*/ |
| | | |
| | | FSMC_Bank1->BTCR[4] = 0x00001011; |
| | | FSMC_Bank1->BTCR[5] = 0x00000200; |
| | | } |
| | | #endif /* DATA_IN_ExtSRAM */ |
| | | |
| | | #ifdef SYSCLK_FREQ_HSE |
| | | /** |
| | | * @brief Selects HSE as System clock source and configure HCLK, PCLK2 |
| | | * and PCLK1 prescalers. |
| | | * @note This function should be used only after reset. |
| | | * @param None |
| | | * @retval None |
| | | */ |
| | | static void SetSysClockToHSE(void) |
| | | { |
| | | __IO uint32_t StartUpCounter = 0, HSEStatus = 0; |
| | | |
| | | /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/ |
| | | /* Enable HSE */ |
| | | RCC->CR |= ((uint32_t)RCC_CR_HSEON); |
| | | |
| | | /* Wait till HSE is ready and if Time out is reached exit */ |
| | | do |
| | | { |
| | | HSEStatus = RCC->CR & RCC_CR_HSERDY; |
| | | StartUpCounter++; |
| | | } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT)); |
| | | |
| | | if ((RCC->CR & RCC_CR_HSERDY) != RESET) |
| | | { |
| | | HSEStatus = (uint32_t)0x01; |
| | | } |
| | | else |
| | | { |
| | | HSEStatus = (uint32_t)0x00; |
| | | } |
| | | |
| | | if (HSEStatus == (uint32_t)0x01) |
| | | { |
| | | |
| | | #if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL && !defined STM32F10X_HD_VL |
| | | /* Enable Prefetch Buffer */ |
| | | FLASH->ACR |= FLASH_ACR_PRFTBE; |
| | | |
| | | /* Flash 0 wait state */ |
| | | FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY); |
| | | |
| | | #ifndef STM32F10X_CL |
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_0; |
| | | #else |
| | | if (HSE_VALUE <= 24000000) |
| | | { |
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_0; |
| | | } |
| | | else |
| | | { |
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_1; |
| | | } |
| | | #endif /* STM32F10X_CL */ |
| | | #endif |
| | | |
| | | /* HCLK = SYSCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1; |
| | | |
| | | /* PCLK2 = HCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1; |
| | | |
| | | /* PCLK1 = HCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV1; |
| | | |
| | | /* Select HSE as system clock source */ |
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW)); |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_SW_HSE; |
| | | |
| | | /* Wait till HSE is used as system clock source */ |
| | | while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)0x04) |
| | | { |
| | | } |
| | | } |
| | | else |
| | | { /* If HSE fails to start-up, the application will have wrong clock |
| | | configuration. User can add here some code to deal with this error */ |
| | | } |
| | | } |
| | | #elif defined SYSCLK_FREQ_24MHz |
| | | /** |
| | | * @brief Sets System clock frequency to 24MHz and configure HCLK, PCLK2 |
| | | * and PCLK1 prescalers. |
| | | * @note This function should be used only after reset. |
| | | * @param None |
| | | * @retval None |
| | | */ |
| | | static void SetSysClockTo24(void) |
| | | { |
| | | __IO uint32_t StartUpCounter = 0, HSEStatus = 0; |
| | | |
| | | /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/ |
| | | /* Enable HSE */ |
| | | RCC->CR |= ((uint32_t)RCC_CR_HSEON); |
| | | |
| | | /* Wait till HSE is ready and if Time out is reached exit */ |
| | | do |
| | | { |
| | | HSEStatus = RCC->CR & RCC_CR_HSERDY; |
| | | StartUpCounter++; |
| | | } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT)); |
| | | |
| | | if ((RCC->CR & RCC_CR_HSERDY) != RESET) |
| | | { |
| | | HSEStatus = (uint32_t)0x01; |
| | | } |
| | | else |
| | | { |
| | | HSEStatus = (uint32_t)0x00; |
| | | } |
| | | |
| | | if (HSEStatus == (uint32_t)0x01) |
| | | { |
| | | #if !defined STM32F10X_LD_VL && !defined STM32F10X_MD_VL && !defined STM32F10X_HD_VL |
| | | /* Enable Prefetch Buffer */ |
| | | FLASH->ACR |= FLASH_ACR_PRFTBE; |
| | | |
| | | /* Flash 0 wait state */ |
| | | FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY); |
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_0; |
| | | #endif |
| | | |
| | | /* HCLK = SYSCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1; |
| | | |
| | | /* PCLK2 = HCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1; |
| | | |
| | | /* PCLK1 = HCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV1; |
| | | |
| | | #ifdef STM32F10X_CL |
| | | /* Configure PLLs ------------------------------------------------------*/ |
| | | /* PLL configuration: PLLCLK = PREDIV1 * 6 = 24 MHz */ |
| | | RCC->CFGR &= (uint32_t)~(RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL); |
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLXTPRE_PREDIV1 | RCC_CFGR_PLLSRC_PREDIV1 | |
| | | RCC_CFGR_PLLMULL6); |
| | | |
| | | /* PLL2 configuration: PLL2CLK = (HSE / 5) * 8 = 40 MHz */ |
| | | /* PREDIV1 configuration: PREDIV1CLK = PLL2 / 10 = 4 MHz */ |
| | | RCC->CFGR2 &= (uint32_t)~(RCC_CFGR2_PREDIV2 | RCC_CFGR2_PLL2MUL | |
| | | RCC_CFGR2_PREDIV1 | RCC_CFGR2_PREDIV1SRC); |
| | | RCC->CFGR2 |= (uint32_t)(RCC_CFGR2_PREDIV2_DIV5 | RCC_CFGR2_PLL2MUL8 | |
| | | RCC_CFGR2_PREDIV1SRC_PLL2 | RCC_CFGR2_PREDIV1_DIV10); |
| | | |
| | | /* Enable PLL2 */ |
| | | RCC->CR |= RCC_CR_PLL2ON; |
| | | /* Wait till PLL2 is ready */ |
| | | while((RCC->CR & RCC_CR_PLL2RDY) == 0) |
| | | { |
| | | } |
| | | #elif defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL) |
| | | /* PLL configuration: = (HSE / 2) * 6 = 24 MHz */ |
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL)); |
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_PREDIV1 | RCC_CFGR_PLLXTPRE_PREDIV1_Div2 | RCC_CFGR_PLLMULL6); |
| | | #else |
| | | /* PLL configuration: = (HSE / 2) * 6 = 24 MHz */ |
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL)); |
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSE | RCC_CFGR_PLLXTPRE_HSE_Div2 | RCC_CFGR_PLLMULL6); |
| | | #endif /* STM32F10X_CL */ |
| | | |
| | | /* Enable PLL */ |
| | | RCC->CR |= RCC_CR_PLLON; |
| | | |
| | | /* Wait till PLL is ready */ |
| | | while((RCC->CR & RCC_CR_PLLRDY) == 0) |
| | | { |
| | | } |
| | | |
| | | /* Select PLL as system clock source */ |
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW)); |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_SW_PLL; |
| | | |
| | | /* Wait till PLL is used as system clock source */ |
| | | while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)0x08) |
| | | { |
| | | } |
| | | } |
| | | else |
| | | { /* If HSE fails to start-up, the application will have wrong clock |
| | | configuration. User can add here some code to deal with this error */ |
| | | } |
| | | } |
| | | #elif defined SYSCLK_FREQ_36MHz |
| | | /** |
| | | * @brief Sets System clock frequency to 36MHz and configure HCLK, PCLK2 |
| | | * and PCLK1 prescalers. |
| | | * @note This function should be used only after reset. |
| | | * @param None |
| | | * @retval None |
| | | */ |
| | | static void SetSysClockTo36(void) |
| | | { |
| | | __IO uint32_t StartUpCounter = 0, HSEStatus = 0; |
| | | |
| | | /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/ |
| | | /* Enable HSE */ |
| | | RCC->CR |= ((uint32_t)RCC_CR_HSEON); |
| | | |
| | | /* Wait till HSE is ready and if Time out is reached exit */ |
| | | do |
| | | { |
| | | HSEStatus = RCC->CR & RCC_CR_HSERDY; |
| | | StartUpCounter++; |
| | | } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT)); |
| | | |
| | | if ((RCC->CR & RCC_CR_HSERDY) != RESET) |
| | | { |
| | | HSEStatus = (uint32_t)0x01; |
| | | } |
| | | else |
| | | { |
| | | HSEStatus = (uint32_t)0x00; |
| | | } |
| | | |
| | | if (HSEStatus == (uint32_t)0x01) |
| | | { |
| | | /* Enable Prefetch Buffer */ |
| | | FLASH->ACR |= FLASH_ACR_PRFTBE; |
| | | |
| | | /* Flash 1 wait state */ |
| | | FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY); |
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_1; |
| | | |
| | | /* HCLK = SYSCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1; |
| | | |
| | | /* PCLK2 = HCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1; |
| | | |
| | | /* PCLK1 = HCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV1; |
| | | |
| | | #ifdef STM32F10X_CL |
| | | /* Configure PLLs ------------------------------------------------------*/ |
| | | |
| | | /* PLL configuration: PLLCLK = PREDIV1 * 9 = 36 MHz */ |
| | | RCC->CFGR &= (uint32_t)~(RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL); |
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLXTPRE_PREDIV1 | RCC_CFGR_PLLSRC_PREDIV1 | |
| | | RCC_CFGR_PLLMULL9); |
| | | |
| | | /*!< PLL2 configuration: PLL2CLK = (HSE / 5) * 8 = 40 MHz */ |
| | | /* PREDIV1 configuration: PREDIV1CLK = PLL2 / 10 = 4 MHz */ |
| | | |
| | | RCC->CFGR2 &= (uint32_t)~(RCC_CFGR2_PREDIV2 | RCC_CFGR2_PLL2MUL | |
| | | RCC_CFGR2_PREDIV1 | RCC_CFGR2_PREDIV1SRC); |
| | | RCC->CFGR2 |= (uint32_t)(RCC_CFGR2_PREDIV2_DIV5 | RCC_CFGR2_PLL2MUL8 | |
| | | RCC_CFGR2_PREDIV1SRC_PLL2 | RCC_CFGR2_PREDIV1_DIV10); |
| | | |
| | | /* Enable PLL2 */ |
| | | RCC->CR |= RCC_CR_PLL2ON; |
| | | /* Wait till PLL2 is ready */ |
| | | while((RCC->CR & RCC_CR_PLL2RDY) == 0) |
| | | { |
| | | } |
| | | |
| | | #else |
| | | /* PLL configuration: PLLCLK = (HSE / 2) * 9 = 36 MHz */ |
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL)); |
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSE | RCC_CFGR_PLLXTPRE_HSE_Div2 | RCC_CFGR_PLLMULL9); |
| | | #endif /* STM32F10X_CL */ |
| | | |
| | | /* Enable PLL */ |
| | | RCC->CR |= RCC_CR_PLLON; |
| | | |
| | | /* Wait till PLL is ready */ |
| | | while((RCC->CR & RCC_CR_PLLRDY) == 0) |
| | | { |
| | | } |
| | | |
| | | /* Select PLL as system clock source */ |
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW)); |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_SW_PLL; |
| | | |
| | | /* Wait till PLL is used as system clock source */ |
| | | while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)0x08) |
| | | { |
| | | } |
| | | } |
| | | else |
| | | { /* If HSE fails to start-up, the application will have wrong clock |
| | | configuration. User can add here some code to deal with this error */ |
| | | } |
| | | } |
| | | #elif defined SYSCLK_FREQ_48MHz |
| | | /** |
| | | * @brief Sets System clock frequency to 48MHz and configure HCLK, PCLK2 |
| | | * and PCLK1 prescalers. |
| | | * @note This function should be used only after reset. |
| | | * @param None |
| | | * @retval None |
| | | */ |
| | | static void SetSysClockTo48(void) |
| | | { |
| | | __IO uint32_t StartUpCounter = 0, HSEStatus = 0; |
| | | |
| | | /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/ |
| | | /* Enable HSE */ |
| | | RCC->CR |= ((uint32_t)RCC_CR_HSEON); |
| | | |
| | | /* Wait till HSE is ready and if Time out is reached exit */ |
| | | do |
| | | { |
| | | HSEStatus = RCC->CR & RCC_CR_HSERDY; |
| | | StartUpCounter++; |
| | | } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT)); |
| | | |
| | | if ((RCC->CR & RCC_CR_HSERDY) != RESET) |
| | | { |
| | | HSEStatus = (uint32_t)0x01; |
| | | } |
| | | else |
| | | { |
| | | HSEStatus = (uint32_t)0x00; |
| | | } |
| | | |
| | | if (HSEStatus == (uint32_t)0x01) |
| | | { |
| | | /* Enable Prefetch Buffer */ |
| | | FLASH->ACR |= FLASH_ACR_PRFTBE; |
| | | |
| | | /* Flash 1 wait state */ |
| | | FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY); |
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_1; |
| | | |
| | | /* HCLK = SYSCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1; |
| | | |
| | | /* PCLK2 = HCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1; |
| | | |
| | | /* PCLK1 = HCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV2; |
| | | |
| | | #ifdef STM32F10X_CL |
| | | /* Configure PLLs ------------------------------------------------------*/ |
| | | /* PLL2 configuration: PLL2CLK = (HSE / 5) * 8 = 40 MHz */ |
| | | /* PREDIV1 configuration: PREDIV1CLK = PLL2 / 5 = 8 MHz */ |
| | | |
| | | RCC->CFGR2 &= (uint32_t)~(RCC_CFGR2_PREDIV2 | RCC_CFGR2_PLL2MUL | |
| | | RCC_CFGR2_PREDIV1 | RCC_CFGR2_PREDIV1SRC); |
| | | RCC->CFGR2 |= (uint32_t)(RCC_CFGR2_PREDIV2_DIV5 | RCC_CFGR2_PLL2MUL8 | |
| | | RCC_CFGR2_PREDIV1SRC_PLL2 | RCC_CFGR2_PREDIV1_DIV5); |
| | | |
| | | /* Enable PLL2 */ |
| | | RCC->CR |= RCC_CR_PLL2ON; |
| | | /* Wait till PLL2 is ready */ |
| | | while((RCC->CR & RCC_CR_PLL2RDY) == 0) |
| | | { |
| | | } |
| | | |
| | | |
| | | /* PLL configuration: PLLCLK = PREDIV1 * 6 = 48 MHz */ |
| | | RCC->CFGR &= (uint32_t)~(RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL); |
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLXTPRE_PREDIV1 | RCC_CFGR_PLLSRC_PREDIV1 | |
| | | RCC_CFGR_PLLMULL6); |
| | | #else |
| | | /* PLL configuration: PLLCLK = HSE * 6 = 48 MHz */ |
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL)); |
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSE | RCC_CFGR_PLLMULL6); |
| | | #endif /* STM32F10X_CL */ |
| | | |
| | | /* Enable PLL */ |
| | | RCC->CR |= RCC_CR_PLLON; |
| | | |
| | | /* Wait till PLL is ready */ |
| | | while((RCC->CR & RCC_CR_PLLRDY) == 0) |
| | | { |
| | | } |
| | | |
| | | /* Select PLL as system clock source */ |
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW)); |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_SW_PLL; |
| | | |
| | | /* Wait till PLL is used as system clock source */ |
| | | while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)0x08) |
| | | { |
| | | } |
| | | } |
| | | else |
| | | { /* If HSE fails to start-up, the application will have wrong clock |
| | | configuration. User can add here some code to deal with this error */ |
| | | } |
| | | } |
| | | |
| | | #elif defined SYSCLK_FREQ_56MHz |
| | | /** |
| | | * @brief Sets System clock frequency to 56MHz and configure HCLK, PCLK2 |
| | | * and PCLK1 prescalers. |
| | | * @note This function should be used only after reset. |
| | | * @param None |
| | | * @retval None |
| | | */ |
| | | static void SetSysClockTo56(void) |
| | | { |
| | | __IO uint32_t StartUpCounter = 0, HSEStatus = 0; |
| | | |
| | | /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/ |
| | | /* Enable HSE */ |
| | | RCC->CR |= ((uint32_t)RCC_CR_HSEON); |
| | | |
| | | /* Wait till HSE is ready and if Time out is reached exit */ |
| | | do |
| | | { |
| | | HSEStatus = RCC->CR & RCC_CR_HSERDY; |
| | | StartUpCounter++; |
| | | } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT)); |
| | | |
| | | if ((RCC->CR & RCC_CR_HSERDY) != RESET) |
| | | { |
| | | HSEStatus = (uint32_t)0x01; |
| | | } |
| | | else |
| | | { |
| | | HSEStatus = (uint32_t)0x00; |
| | | } |
| | | |
| | | if (HSEStatus == (uint32_t)0x01) |
| | | { |
| | | /* Enable Prefetch Buffer */ |
| | | FLASH->ACR |= FLASH_ACR_PRFTBE; |
| | | |
| | | /* Flash 2 wait state */ |
| | | FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY); |
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_2; |
| | | |
| | | /* HCLK = SYSCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1; |
| | | |
| | | /* PCLK2 = HCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1; |
| | | |
| | | /* PCLK1 = HCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV2; |
| | | |
| | | #ifdef STM32F10X_CL |
| | | /* Configure PLLs ------------------------------------------------------*/ |
| | | /* PLL2 configuration: PLL2CLK = (HSE / 5) * 8 = 40 MHz */ |
| | | /* PREDIV1 configuration: PREDIV1CLK = PLL2 / 5 = 8 MHz */ |
| | | |
| | | RCC->CFGR2 &= (uint32_t)~(RCC_CFGR2_PREDIV2 | RCC_CFGR2_PLL2MUL | |
| | | RCC_CFGR2_PREDIV1 | RCC_CFGR2_PREDIV1SRC); |
| | | RCC->CFGR2 |= (uint32_t)(RCC_CFGR2_PREDIV2_DIV5 | RCC_CFGR2_PLL2MUL8 | |
| | | RCC_CFGR2_PREDIV1SRC_PLL2 | RCC_CFGR2_PREDIV1_DIV5); |
| | | |
| | | /* Enable PLL2 */ |
| | | RCC->CR |= RCC_CR_PLL2ON; |
| | | /* Wait till PLL2 is ready */ |
| | | while((RCC->CR & RCC_CR_PLL2RDY) == 0) |
| | | { |
| | | } |
| | | |
| | | |
| | | /* PLL configuration: PLLCLK = PREDIV1 * 7 = 56 MHz */ |
| | | RCC->CFGR &= (uint32_t)~(RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL); |
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLXTPRE_PREDIV1 | RCC_CFGR_PLLSRC_PREDIV1 | |
| | | RCC_CFGR_PLLMULL7); |
| | | #else |
| | | /* PLL configuration: PLLCLK = HSE * 7 = 56 MHz */ |
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLMULL)); |
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSE | RCC_CFGR_PLLMULL7); |
| | | |
| | | #endif /* STM32F10X_CL */ |
| | | |
| | | /* Enable PLL */ |
| | | RCC->CR |= RCC_CR_PLLON; |
| | | |
| | | /* Wait till PLL is ready */ |
| | | while((RCC->CR & RCC_CR_PLLRDY) == 0) |
| | | { |
| | | } |
| | | |
| | | /* Select PLL as system clock source */ |
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW)); |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_SW_PLL; |
| | | |
| | | /* Wait till PLL is used as system clock source */ |
| | | while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)0x08) |
| | | { |
| | | } |
| | | } |
| | | else |
| | | { /* If HSE fails to start-up, the application will have wrong clock |
| | | configuration. User can add here some code to deal with this error */ |
| | | } |
| | | } |
| | | |
| | | #elif defined SYSCLK_FREQ_72MHz |
| | | /** |
| | | * @brief Sets System clock frequency to 72MHz and configure HCLK, PCLK2 |
| | | * and PCLK1 prescalers. |
| | | * @note This function should be used only after reset. |
| | | * @param None |
| | | * @retval None |
| | | */ |
| | | static void SetSysClockTo72(void) |
| | | { |
| | | __IO uint32_t StartUpCounter = 0, HSEStatus = 0; |
| | | |
| | | /* SYSCLK, HCLK, PCLK2 and PCLK1 configuration ---------------------------*/ |
| | | /* Enable HSE */ |
| | | RCC->CR |= ((uint32_t)RCC_CR_HSEON); |
| | | |
| | | /* Wait till HSE is ready and if Time out is reached exit */ |
| | | do |
| | | { |
| | | HSEStatus = RCC->CR & RCC_CR_HSERDY; |
| | | StartUpCounter++; |
| | | } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT)); |
| | | |
| | | if ((RCC->CR & RCC_CR_HSERDY) != RESET) |
| | | { |
| | | HSEStatus = (uint32_t)0x01; |
| | | } |
| | | else |
| | | { |
| | | HSEStatus = (uint32_t)0x00; |
| | | } |
| | | |
| | | if (HSEStatus == (uint32_t)0x01) |
| | | { |
| | | /* Enable Prefetch Buffer */ |
| | | FLASH->ACR |= FLASH_ACR_PRFTBE; |
| | | |
| | | /* Flash 2 wait state */ |
| | | FLASH->ACR &= (uint32_t)((uint32_t)~FLASH_ACR_LATENCY); |
| | | FLASH->ACR |= (uint32_t)FLASH_ACR_LATENCY_2; |
| | | |
| | | |
| | | /* HCLK = SYSCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_HPRE_DIV1; |
| | | |
| | | /* PCLK2 = HCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE2_DIV1; |
| | | |
| | | /* PCLK1 = HCLK */ |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_PPRE1_DIV2; |
| | | |
| | | #ifdef STM32F10X_CL |
| | | /* Configure PLLs ------------------------------------------------------*/ |
| | | /* PLL2 configuration: PLL2CLK = (HSE / 5) * 8 = 40 MHz */ |
| | | /* PREDIV1 configuration: PREDIV1CLK = PLL2 / 5 = 8 MHz */ |
| | | |
| | | RCC->CFGR2 &= (uint32_t)~(RCC_CFGR2_PREDIV2 | RCC_CFGR2_PLL2MUL | |
| | | RCC_CFGR2_PREDIV1 | RCC_CFGR2_PREDIV1SRC); |
| | | RCC->CFGR2 |= (uint32_t)(RCC_CFGR2_PREDIV2_DIV5 | RCC_CFGR2_PLL2MUL8 | |
| | | RCC_CFGR2_PREDIV1SRC_PLL2 | RCC_CFGR2_PREDIV1_DIV5); |
| | | |
| | | /* Enable PLL2 */ |
| | | RCC->CR |= RCC_CR_PLL2ON; |
| | | /* Wait till PLL2 is ready */ |
| | | while((RCC->CR & RCC_CR_PLL2RDY) == 0) |
| | | { |
| | | } |
| | | |
| | | |
| | | /* PLL configuration: PLLCLK = PREDIV1 * 9 = 72 MHz */ |
| | | RCC->CFGR &= (uint32_t)~(RCC_CFGR_PLLXTPRE | RCC_CFGR_PLLSRC | RCC_CFGR_PLLMULL); |
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLXTPRE_PREDIV1 | RCC_CFGR_PLLSRC_PREDIV1 | |
| | | RCC_CFGR_PLLMULL9); |
| | | #else |
| | | /* PLL configuration: PLLCLK = HSE * 9 = 72 MHz */ |
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_PLLSRC | RCC_CFGR_PLLXTPRE | |
| | | RCC_CFGR_PLLMULL)); |
| | | RCC->CFGR |= (uint32_t)(RCC_CFGR_PLLSRC_HSE | RCC_CFGR_PLLMULL9); |
| | | #endif /* STM32F10X_CL */ |
| | | |
| | | /* Enable PLL */ |
| | | RCC->CR |= RCC_CR_PLLON; |
| | | |
| | | /* Wait till PLL is ready */ |
| | | while((RCC->CR & RCC_CR_PLLRDY) == 0) |
| | | { |
| | | } |
| | | |
| | | /* Select PLL as system clock source */ |
| | | RCC->CFGR &= (uint32_t)((uint32_t)~(RCC_CFGR_SW)); |
| | | RCC->CFGR |= (uint32_t)RCC_CFGR_SW_PLL; |
| | | |
| | | /* Wait till PLL is used as system clock source */ |
| | | while ((RCC->CFGR & (uint32_t)RCC_CFGR_SWS) != (uint32_t)0x08) |
| | | { |
| | | } |
| | | } |
| | | else |
| | | { /* If HSE fails to start-up, the application will have wrong clock |
| | | configuration. User can add here some code to deal with this error */ |
| | | } |
| | | } |
| | | #endif |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | |
| | | /** |
| | | * @} |
| | | */ |
| | | /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/ |