mbed library sources
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Diff: targets/cmsis/TARGET_STM/TARGET_NUCLEO_F103RB/stm32f10x_rcc.c
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- 52:a51c77007319
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/targets/cmsis/TARGET_STM/TARGET_NUCLEO_F103RB/stm32f10x_rcc.c Mon Dec 02 11:30:05 2013 +0000 @@ -0,0 +1,1470 @@ +/** + ****************************************************************************** + * @file stm32f10x_rcc.c + * @author MCD Application Team + * @version V3.5.0 + * @date 11-March-2011 + * @brief This file provides all the RCC 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_rcc.h" + +/** @addtogroup STM32F10x_StdPeriph_Driver + * @{ + */ + +/** @defgroup RCC + * @brief RCC driver modules + * @{ + */ + +/** @defgroup RCC_Private_TypesDefinitions + * @{ + */ + +/** + * @} + */ + +/** @defgroup RCC_Private_Defines + * @{ + */ + +/* ------------ RCC registers bit address in the alias region ----------- */ +#define RCC_OFFSET (RCC_BASE - PERIPH_BASE) + +/* --- CR Register ---*/ + +/* Alias word address of HSION bit */ +#define CR_OFFSET (RCC_OFFSET + 0x00) +#define HSION_BitNumber 0x00 +#define CR_HSION_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (HSION_BitNumber * 4)) + +/* Alias word address of PLLON bit */ +#define PLLON_BitNumber 0x18 +#define CR_PLLON_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (PLLON_BitNumber * 4)) + +#ifdef STM32F10X_CL + /* Alias word address of PLL2ON bit */ + #define PLL2ON_BitNumber 0x1A + #define CR_PLL2ON_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (PLL2ON_BitNumber * 4)) + + /* Alias word address of PLL3ON bit */ + #define PLL3ON_BitNumber 0x1C + #define CR_PLL3ON_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (PLL3ON_BitNumber * 4)) +#endif /* STM32F10X_CL */ + +/* Alias word address of CSSON bit */ +#define CSSON_BitNumber 0x13 +#define CR_CSSON_BB (PERIPH_BB_BASE + (CR_OFFSET * 32) + (CSSON_BitNumber * 4)) + +/* --- CFGR Register ---*/ + +/* Alias word address of USBPRE bit */ +#define CFGR_OFFSET (RCC_OFFSET + 0x04) + +#ifndef STM32F10X_CL + #define USBPRE_BitNumber 0x16 + #define CFGR_USBPRE_BB (PERIPH_BB_BASE + (CFGR_OFFSET * 32) + (USBPRE_BitNumber * 4)) +#else + #define OTGFSPRE_BitNumber 0x16 + #define CFGR_OTGFSPRE_BB (PERIPH_BB_BASE + (CFGR_OFFSET * 32) + (OTGFSPRE_BitNumber * 4)) +#endif /* STM32F10X_CL */ + +/* --- BDCR Register ---*/ + +/* Alias word address of RTCEN bit */ +#define BDCR_OFFSET (RCC_OFFSET + 0x20) +#define RTCEN_BitNumber 0x0F +#define BDCR_RTCEN_BB (PERIPH_BB_BASE + (BDCR_OFFSET * 32) + (RTCEN_BitNumber * 4)) + +/* Alias word address of BDRST bit */ +#define BDRST_BitNumber 0x10 +#define BDCR_BDRST_BB (PERIPH_BB_BASE + (BDCR_OFFSET * 32) + (BDRST_BitNumber * 4)) + +/* --- CSR Register ---*/ + +/* Alias word address of LSION bit */ +#define CSR_OFFSET (RCC_OFFSET + 0x24) +#define LSION_BitNumber 0x00 +#define CSR_LSION_BB (PERIPH_BB_BASE + (CSR_OFFSET * 32) + (LSION_BitNumber * 4)) + +#ifdef STM32F10X_CL +/* --- CFGR2 Register ---*/ + + /* Alias word address of I2S2SRC bit */ + #define CFGR2_OFFSET (RCC_OFFSET + 0x2C) + #define I2S2SRC_BitNumber 0x11 + #define CFGR2_I2S2SRC_BB (PERIPH_BB_BASE + (CFGR2_OFFSET * 32) + (I2S2SRC_BitNumber * 4)) + + /* Alias word address of I2S3SRC bit */ + #define I2S3SRC_BitNumber 0x12 + #define CFGR2_I2S3SRC_BB (PERIPH_BB_BASE + (CFGR2_OFFSET * 32) + (I2S3SRC_BitNumber * 4)) +#endif /* STM32F10X_CL */ + +/* ---------------------- RCC registers bit mask ------------------------ */ + +/* CR register bit mask */ +#define CR_HSEBYP_Reset ((uint32_t)0xFFFBFFFF) +#define CR_HSEBYP_Set ((uint32_t)0x00040000) +#define CR_HSEON_Reset ((uint32_t)0xFFFEFFFF) +#define CR_HSEON_Set ((uint32_t)0x00010000) +#define CR_HSITRIM_Mask ((uint32_t)0xFFFFFF07) + +/* CFGR register bit mask */ +#if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL) || defined (STM32F10X_CL) + #define CFGR_PLL_Mask ((uint32_t)0xFFC2FFFF) +#else + #define CFGR_PLL_Mask ((uint32_t)0xFFC0FFFF) +#endif /* STM32F10X_CL */ + +#define CFGR_PLLMull_Mask ((uint32_t)0x003C0000) +#define CFGR_PLLSRC_Mask ((uint32_t)0x00010000) +#define CFGR_PLLXTPRE_Mask ((uint32_t)0x00020000) +#define CFGR_SWS_Mask ((uint32_t)0x0000000C) +#define CFGR_SW_Mask ((uint32_t)0xFFFFFFFC) +#define CFGR_HPRE_Reset_Mask ((uint32_t)0xFFFFFF0F) +#define CFGR_HPRE_Set_Mask ((uint32_t)0x000000F0) +#define CFGR_PPRE1_Reset_Mask ((uint32_t)0xFFFFF8FF) +#define CFGR_PPRE1_Set_Mask ((uint32_t)0x00000700) +#define CFGR_PPRE2_Reset_Mask ((uint32_t)0xFFFFC7FF) +#define CFGR_PPRE2_Set_Mask ((uint32_t)0x00003800) +#define CFGR_ADCPRE_Reset_Mask ((uint32_t)0xFFFF3FFF) +#define CFGR_ADCPRE_Set_Mask ((uint32_t)0x0000C000) + +/* CSR register bit mask */ +#define CSR_RMVF_Set ((uint32_t)0x01000000) + +#if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL) || defined (STM32F10X_CL) +/* CFGR2 register bit mask */ + #define CFGR2_PREDIV1SRC ((uint32_t)0x00010000) + #define CFGR2_PREDIV1 ((uint32_t)0x0000000F) +#endif +#ifdef STM32F10X_CL + #define CFGR2_PREDIV2 ((uint32_t)0x000000F0) + #define CFGR2_PLL2MUL ((uint32_t)0x00000F00) + #define CFGR2_PLL3MUL ((uint32_t)0x0000F000) +#endif /* STM32F10X_CL */ + +/* RCC Flag Mask */ +#define FLAG_Mask ((uint8_t)0x1F) + +/* CIR register byte 2 (Bits[15:8]) base address */ +#define CIR_BYTE2_ADDRESS ((uint32_t)0x40021009) + +/* CIR register byte 3 (Bits[23:16]) base address */ +#define CIR_BYTE3_ADDRESS ((uint32_t)0x4002100A) + +/* CFGR register byte 4 (Bits[31:24]) base address */ +#define CFGR_BYTE4_ADDRESS ((uint32_t)0x40021007) + +/* BDCR register base address */ +#define BDCR_ADDRESS (PERIPH_BASE + BDCR_OFFSET) + +/** + * @} + */ + +/** @defgroup RCC_Private_Macros + * @{ + */ + +/** + * @} + */ + +/** @defgroup RCC_Private_Variables + * @{ + */ + +static __I uint8_t APBAHBPrescTable[16] = {0, 0, 0, 0, 1, 2, 3, 4, 1, 2, 3, 4, 6, 7, 8, 9}; +static __I uint8_t ADCPrescTable[4] = {2, 4, 6, 8}; + +/** + * @} + */ + +/** @defgroup RCC_Private_FunctionPrototypes + * @{ + */ + +/** + * @} + */ + +/** @defgroup RCC_Private_Functions + * @{ + */ + +/** + * @brief Resets the RCC clock configuration to the default reset state. + * @param None + * @retval None + */ +void RCC_DeInit(void) +{ + /* 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 */ + +} + +/** + * @brief Configures the External High Speed oscillator (HSE). + * @note HSE can not be stopped if it is used directly or through the PLL as system clock. + * @param RCC_HSE: specifies the new state of the HSE. + * This parameter can be one of the following values: + * @arg RCC_HSE_OFF: HSE oscillator OFF + * @arg RCC_HSE_ON: HSE oscillator ON + * @arg RCC_HSE_Bypass: HSE oscillator bypassed with external clock + * @retval None + */ +void RCC_HSEConfig(uint32_t RCC_HSE) +{ + /* Check the parameters */ + assert_param(IS_RCC_HSE(RCC_HSE)); + /* Reset HSEON and HSEBYP bits before configuring the HSE ------------------*/ + /* Reset HSEON bit */ + RCC->CR &= CR_HSEON_Reset; + /* Reset HSEBYP bit */ + RCC->CR &= CR_HSEBYP_Reset; + /* Configure HSE (RCC_HSE_OFF is already covered by the code section above) */ + switch(RCC_HSE) + { + case RCC_HSE_ON: + /* Set HSEON bit */ + RCC->CR |= CR_HSEON_Set; + break; + + case RCC_HSE_Bypass: + /* Set HSEBYP and HSEON bits */ + RCC->CR |= CR_HSEBYP_Set | CR_HSEON_Set; + break; + + default: + break; + } +} + +/** + * @brief Waits for HSE start-up. + * @param None + * @retval An ErrorStatus enumuration value: + * - SUCCESS: HSE oscillator is stable and ready to use + * - ERROR: HSE oscillator not yet ready + */ +ErrorStatus RCC_WaitForHSEStartUp(void) +{ + __IO uint32_t StartUpCounter = 0; + ErrorStatus status = ERROR; + FlagStatus HSEStatus = RESET; + + /* Wait till HSE is ready and if Time out is reached exit */ + do + { + HSEStatus = RCC_GetFlagStatus(RCC_FLAG_HSERDY); + StartUpCounter++; + } while((StartUpCounter != HSE_STARTUP_TIMEOUT) && (HSEStatus == RESET)); + + if (RCC_GetFlagStatus(RCC_FLAG_HSERDY) != RESET) + { + status = SUCCESS; + } + else + { + status = ERROR; + } + return (status); +} + +/** + * @brief Adjusts the Internal High Speed oscillator (HSI) calibration value. + * @param HSICalibrationValue: specifies the calibration trimming value. + * This parameter must be a number between 0 and 0x1F. + * @retval None + */ +void RCC_AdjustHSICalibrationValue(uint8_t HSICalibrationValue) +{ + uint32_t tmpreg = 0; + /* Check the parameters */ + assert_param(IS_RCC_CALIBRATION_VALUE(HSICalibrationValue)); + tmpreg = RCC->CR; + /* Clear HSITRIM[4:0] bits */ + tmpreg &= CR_HSITRIM_Mask; + /* Set the HSITRIM[4:0] bits according to HSICalibrationValue value */ + tmpreg |= (uint32_t)HSICalibrationValue << 3; + /* Store the new value */ + RCC->CR = tmpreg; +} + +/** + * @brief Enables or disables the Internal High Speed oscillator (HSI). + * @note HSI can not be stopped if it is used directly or through the PLL as system clock. + * @param NewState: new state of the HSI. This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_HSICmd(FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_FUNCTIONAL_STATE(NewState)); + *(__IO uint32_t *) CR_HSION_BB = (uint32_t)NewState; +} + +/** + * @brief Configures the PLL clock source and multiplication factor. + * @note This function must be used only when the PLL is disabled. + * @param RCC_PLLSource: specifies the PLL entry clock source. + * For @b STM32_Connectivity_line_devices or @b STM32_Value_line_devices, + * this parameter can be one of the following values: + * @arg RCC_PLLSource_HSI_Div2: HSI oscillator clock divided by 2 selected as PLL clock entry + * @arg RCC_PLLSource_PREDIV1: PREDIV1 clock selected as PLL clock entry + * For @b other_STM32_devices, this parameter can be one of the following values: + * @arg RCC_PLLSource_HSI_Div2: HSI oscillator clock divided by 2 selected as PLL clock entry + * @arg RCC_PLLSource_HSE_Div1: HSE oscillator clock selected as PLL clock entry + * @arg RCC_PLLSource_HSE_Div2: HSE oscillator clock divided by 2 selected as PLL clock entry + * @param RCC_PLLMul: specifies the PLL multiplication factor. + * For @b STM32_Connectivity_line_devices, this parameter can be RCC_PLLMul_x where x:{[4,9], 6_5} + * For @b other_STM32_devices, this parameter can be RCC_PLLMul_x where x:[2,16] + * @retval None + */ +void RCC_PLLConfig(uint32_t RCC_PLLSource, uint32_t RCC_PLLMul) +{ + uint32_t tmpreg = 0; + + /* Check the parameters */ + assert_param(IS_RCC_PLL_SOURCE(RCC_PLLSource)); + assert_param(IS_RCC_PLL_MUL(RCC_PLLMul)); + + tmpreg = RCC->CFGR; + /* Clear PLLSRC, PLLXTPRE and PLLMUL[3:0] bits */ + tmpreg &= CFGR_PLL_Mask; + /* Set the PLL configuration bits */ + tmpreg |= RCC_PLLSource | RCC_PLLMul; + /* Store the new value */ + RCC->CFGR = tmpreg; +} + +/** + * @brief Enables or disables the PLL. + * @note The PLL can not be disabled if it is used as system clock. + * @param NewState: new state of the PLL. This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_PLLCmd(FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + *(__IO uint32_t *) CR_PLLON_BB = (uint32_t)NewState; +} + +#if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL) || defined (STM32F10X_CL) +/** + * @brief Configures the PREDIV1 division factor. + * @note + * - This function must be used only when the PLL is disabled. + * - This function applies only to STM32 Connectivity line and Value line + * devices. + * @param RCC_PREDIV1_Source: specifies the PREDIV1 clock source. + * This parameter can be one of the following values: + * @arg RCC_PREDIV1_Source_HSE: HSE selected as PREDIV1 clock + * @arg RCC_PREDIV1_Source_PLL2: PLL2 selected as PREDIV1 clock + * @note + * For @b STM32_Value_line_devices this parameter is always RCC_PREDIV1_Source_HSE + * @param RCC_PREDIV1_Div: specifies the PREDIV1 clock division factor. + * This parameter can be RCC_PREDIV1_Divx where x:[1,16] + * @retval None + */ +void RCC_PREDIV1Config(uint32_t RCC_PREDIV1_Source, uint32_t RCC_PREDIV1_Div) +{ + uint32_t tmpreg = 0; + + /* Check the parameters */ + assert_param(IS_RCC_PREDIV1_SOURCE(RCC_PREDIV1_Source)); + assert_param(IS_RCC_PREDIV1(RCC_PREDIV1_Div)); + + tmpreg = RCC->CFGR2; + /* Clear PREDIV1[3:0] and PREDIV1SRC bits */ + tmpreg &= ~(CFGR2_PREDIV1 | CFGR2_PREDIV1SRC); + /* Set the PREDIV1 clock source and division factor */ + tmpreg |= RCC_PREDIV1_Source | RCC_PREDIV1_Div ; + /* Store the new value */ + RCC->CFGR2 = tmpreg; +} +#endif + +#ifdef STM32F10X_CL +/** + * @brief Configures the PREDIV2 division factor. + * @note + * - This function must be used only when both PLL2 and PLL3 are disabled. + * - This function applies only to STM32 Connectivity line devices. + * @param RCC_PREDIV2_Div: specifies the PREDIV2 clock division factor. + * This parameter can be RCC_PREDIV2_Divx where x:[1,16] + * @retval None + */ +void RCC_PREDIV2Config(uint32_t RCC_PREDIV2_Div) +{ + uint32_t tmpreg = 0; + + /* Check the parameters */ + assert_param(IS_RCC_PREDIV2(RCC_PREDIV2_Div)); + + tmpreg = RCC->CFGR2; + /* Clear PREDIV2[3:0] bits */ + tmpreg &= ~CFGR2_PREDIV2; + /* Set the PREDIV2 division factor */ + tmpreg |= RCC_PREDIV2_Div; + /* Store the new value */ + RCC->CFGR2 = tmpreg; +} + +/** + * @brief Configures the PLL2 multiplication factor. + * @note + * - This function must be used only when the PLL2 is disabled. + * - This function applies only to STM32 Connectivity line devices. + * @param RCC_PLL2Mul: specifies the PLL2 multiplication factor. + * This parameter can be RCC_PLL2Mul_x where x:{[8,14], 16, 20} + * @retval None + */ +void RCC_PLL2Config(uint32_t RCC_PLL2Mul) +{ + uint32_t tmpreg = 0; + + /* Check the parameters */ + assert_param(IS_RCC_PLL2_MUL(RCC_PLL2Mul)); + + tmpreg = RCC->CFGR2; + /* Clear PLL2Mul[3:0] bits */ + tmpreg &= ~CFGR2_PLL2MUL; + /* Set the PLL2 configuration bits */ + tmpreg |= RCC_PLL2Mul; + /* Store the new value */ + RCC->CFGR2 = tmpreg; +} + + +/** + * @brief Enables or disables the PLL2. + * @note + * - The PLL2 can not be disabled if it is used indirectly as system clock + * (i.e. it is used as PLL clock entry that is used as System clock). + * - This function applies only to STM32 Connectivity line devices. + * @param NewState: new state of the PLL2. This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_PLL2Cmd(FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + *(__IO uint32_t *) CR_PLL2ON_BB = (uint32_t)NewState; +} + + +/** + * @brief Configures the PLL3 multiplication factor. + * @note + * - This function must be used only when the PLL3 is disabled. + * - This function applies only to STM32 Connectivity line devices. + * @param RCC_PLL3Mul: specifies the PLL3 multiplication factor. + * This parameter can be RCC_PLL3Mul_x where x:{[8,14], 16, 20} + * @retval None + */ +void RCC_PLL3Config(uint32_t RCC_PLL3Mul) +{ + uint32_t tmpreg = 0; + + /* Check the parameters */ + assert_param(IS_RCC_PLL3_MUL(RCC_PLL3Mul)); + + tmpreg = RCC->CFGR2; + /* Clear PLL3Mul[3:0] bits */ + tmpreg &= ~CFGR2_PLL3MUL; + /* Set the PLL3 configuration bits */ + tmpreg |= RCC_PLL3Mul; + /* Store the new value */ + RCC->CFGR2 = tmpreg; +} + + +/** + * @brief Enables or disables the PLL3. + * @note This function applies only to STM32 Connectivity line devices. + * @param NewState: new state of the PLL3. This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_PLL3Cmd(FunctionalState NewState) +{ + /* Check the parameters */ + + assert_param(IS_FUNCTIONAL_STATE(NewState)); + *(__IO uint32_t *) CR_PLL3ON_BB = (uint32_t)NewState; +} +#endif /* STM32F10X_CL */ + +/** + * @brief Configures the system clock (SYSCLK). + * @param RCC_SYSCLKSource: specifies the clock source used as system clock. + * This parameter can be one of the following values: + * @arg RCC_SYSCLKSource_HSI: HSI selected as system clock + * @arg RCC_SYSCLKSource_HSE: HSE selected as system clock + * @arg RCC_SYSCLKSource_PLLCLK: PLL selected as system clock + * @retval None + */ +void RCC_SYSCLKConfig(uint32_t RCC_SYSCLKSource) +{ + uint32_t tmpreg = 0; + /* Check the parameters */ + assert_param(IS_RCC_SYSCLK_SOURCE(RCC_SYSCLKSource)); + tmpreg = RCC->CFGR; + /* Clear SW[1:0] bits */ + tmpreg &= CFGR_SW_Mask; + /* Set SW[1:0] bits according to RCC_SYSCLKSource value */ + tmpreg |= RCC_SYSCLKSource; + /* Store the new value */ + RCC->CFGR = tmpreg; +} + +/** + * @brief Returns the clock source used as system clock. + * @param None + * @retval The clock source used as system clock. The returned value can + * be one of the following: + * - 0x00: HSI used as system clock + * - 0x04: HSE used as system clock + * - 0x08: PLL used as system clock + */ +uint8_t RCC_GetSYSCLKSource(void) +{ + return ((uint8_t)(RCC->CFGR & CFGR_SWS_Mask)); +} + +/** + * @brief Configures the AHB clock (HCLK). + * @param RCC_SYSCLK: defines the AHB clock divider. This clock is derived from + * the system clock (SYSCLK). + * This parameter can be one of the following values: + * @arg RCC_SYSCLK_Div1: AHB clock = SYSCLK + * @arg RCC_SYSCLK_Div2: AHB clock = SYSCLK/2 + * @arg RCC_SYSCLK_Div4: AHB clock = SYSCLK/4 + * @arg RCC_SYSCLK_Div8: AHB clock = SYSCLK/8 + * @arg RCC_SYSCLK_Div16: AHB clock = SYSCLK/16 + * @arg RCC_SYSCLK_Div64: AHB clock = SYSCLK/64 + * @arg RCC_SYSCLK_Div128: AHB clock = SYSCLK/128 + * @arg RCC_SYSCLK_Div256: AHB clock = SYSCLK/256 + * @arg RCC_SYSCLK_Div512: AHB clock = SYSCLK/512 + * @retval None + */ +void RCC_HCLKConfig(uint32_t RCC_SYSCLK) +{ + uint32_t tmpreg = 0; + /* Check the parameters */ + assert_param(IS_RCC_HCLK(RCC_SYSCLK)); + tmpreg = RCC->CFGR; + /* Clear HPRE[3:0] bits */ + tmpreg &= CFGR_HPRE_Reset_Mask; + /* Set HPRE[3:0] bits according to RCC_SYSCLK value */ + tmpreg |= RCC_SYSCLK; + /* Store the new value */ + RCC->CFGR = tmpreg; +} + +/** + * @brief Configures the Low Speed APB clock (PCLK1). + * @param RCC_HCLK: defines the APB1 clock divider. This clock is derived from + * the AHB clock (HCLK). + * This parameter can be one of the following values: + * @arg RCC_HCLK_Div1: APB1 clock = HCLK + * @arg RCC_HCLK_Div2: APB1 clock = HCLK/2 + * @arg RCC_HCLK_Div4: APB1 clock = HCLK/4 + * @arg RCC_HCLK_Div8: APB1 clock = HCLK/8 + * @arg RCC_HCLK_Div16: APB1 clock = HCLK/16 + * @retval None + */ +void RCC_PCLK1Config(uint32_t RCC_HCLK) +{ + uint32_t tmpreg = 0; + /* Check the parameters */ + assert_param(IS_RCC_PCLK(RCC_HCLK)); + tmpreg = RCC->CFGR; + /* Clear PPRE1[2:0] bits */ + tmpreg &= CFGR_PPRE1_Reset_Mask; + /* Set PPRE1[2:0] bits according to RCC_HCLK value */ + tmpreg |= RCC_HCLK; + /* Store the new value */ + RCC->CFGR = tmpreg; +} + +/** + * @brief Configures the High Speed APB clock (PCLK2). + * @param RCC_HCLK: defines the APB2 clock divider. This clock is derived from + * the AHB clock (HCLK). + * This parameter can be one of the following values: + * @arg RCC_HCLK_Div1: APB2 clock = HCLK + * @arg RCC_HCLK_Div2: APB2 clock = HCLK/2 + * @arg RCC_HCLK_Div4: APB2 clock = HCLK/4 + * @arg RCC_HCLK_Div8: APB2 clock = HCLK/8 + * @arg RCC_HCLK_Div16: APB2 clock = HCLK/16 + * @retval None + */ +void RCC_PCLK2Config(uint32_t RCC_HCLK) +{ + uint32_t tmpreg = 0; + /* Check the parameters */ + assert_param(IS_RCC_PCLK(RCC_HCLK)); + tmpreg = RCC->CFGR; + /* Clear PPRE2[2:0] bits */ + tmpreg &= CFGR_PPRE2_Reset_Mask; + /* Set PPRE2[2:0] bits according to RCC_HCLK value */ + tmpreg |= RCC_HCLK << 3; + /* Store the new value */ + RCC->CFGR = tmpreg; +} + +/** + * @brief Enables or disables the specified RCC interrupts. + * @param RCC_IT: specifies the RCC interrupt sources to be enabled or disabled. + * + * For @b STM32_Connectivity_line_devices, this parameter can be any combination + * of the following values + * @arg RCC_IT_LSIRDY: LSI ready interrupt + * @arg RCC_IT_LSERDY: LSE ready interrupt + * @arg RCC_IT_HSIRDY: HSI ready interrupt + * @arg RCC_IT_HSERDY: HSE ready interrupt + * @arg RCC_IT_PLLRDY: PLL ready interrupt + * @arg RCC_IT_PLL2RDY: PLL2 ready interrupt + * @arg RCC_IT_PLL3RDY: PLL3 ready interrupt + * + * For @b other_STM32_devices, this parameter can be any combination of the + * following values + * @arg RCC_IT_LSIRDY: LSI ready interrupt + * @arg RCC_IT_LSERDY: LSE ready interrupt + * @arg RCC_IT_HSIRDY: HSI ready interrupt + * @arg RCC_IT_HSERDY: HSE ready interrupt + * @arg RCC_IT_PLLRDY: PLL ready interrupt + * + * @param NewState: new state of the specified RCC interrupts. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_ITConfig(uint8_t RCC_IT, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_RCC_IT(RCC_IT)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + if (NewState != DISABLE) + { + /* Perform Byte access to RCC_CIR bits to enable the selected interrupts */ + *(__IO uint8_t *) CIR_BYTE2_ADDRESS |= RCC_IT; + } + else + { + /* Perform Byte access to RCC_CIR bits to disable the selected interrupts */ + *(__IO uint8_t *) CIR_BYTE2_ADDRESS &= (uint8_t)~RCC_IT; + } +} + +#ifndef STM32F10X_CL +/** + * @brief Configures the USB clock (USBCLK). + * @param RCC_USBCLKSource: specifies the USB clock source. This clock is + * derived from the PLL output. + * This parameter can be one of the following values: + * @arg RCC_USBCLKSource_PLLCLK_1Div5: PLL clock divided by 1,5 selected as USB + * clock source + * @arg RCC_USBCLKSource_PLLCLK_Div1: PLL clock selected as USB clock source + * @retval None + */ +void RCC_USBCLKConfig(uint32_t RCC_USBCLKSource) +{ + /* Check the parameters */ + assert_param(IS_RCC_USBCLK_SOURCE(RCC_USBCLKSource)); + + *(__IO uint32_t *) CFGR_USBPRE_BB = RCC_USBCLKSource; +} +#else +/** + * @brief Configures the USB OTG FS clock (OTGFSCLK). + * This function applies only to STM32 Connectivity line devices. + * @param RCC_OTGFSCLKSource: specifies the USB OTG FS clock source. + * This clock is derived from the PLL output. + * This parameter can be one of the following values: + * @arg RCC_OTGFSCLKSource_PLLVCO_Div3: PLL VCO clock divided by 2 selected as USB OTG FS clock source + * @arg RCC_OTGFSCLKSource_PLLVCO_Div2: PLL VCO clock divided by 2 selected as USB OTG FS clock source + * @retval None + */ +void RCC_OTGFSCLKConfig(uint32_t RCC_OTGFSCLKSource) +{ + /* Check the parameters */ + assert_param(IS_RCC_OTGFSCLK_SOURCE(RCC_OTGFSCLKSource)); + + *(__IO uint32_t *) CFGR_OTGFSPRE_BB = RCC_OTGFSCLKSource; +} +#endif /* STM32F10X_CL */ + +/** + * @brief Configures the ADC clock (ADCCLK). + * @param RCC_PCLK2: defines the ADC clock divider. This clock is derived from + * the APB2 clock (PCLK2). + * This parameter can be one of the following values: + * @arg RCC_PCLK2_Div2: ADC clock = PCLK2/2 + * @arg RCC_PCLK2_Div4: ADC clock = PCLK2/4 + * @arg RCC_PCLK2_Div6: ADC clock = PCLK2/6 + * @arg RCC_PCLK2_Div8: ADC clock = PCLK2/8 + * @retval None + */ +void RCC_ADCCLKConfig(uint32_t RCC_PCLK2) +{ + uint32_t tmpreg = 0; + /* Check the parameters */ + assert_param(IS_RCC_ADCCLK(RCC_PCLK2)); + tmpreg = RCC->CFGR; + /* Clear ADCPRE[1:0] bits */ + tmpreg &= CFGR_ADCPRE_Reset_Mask; + /* Set ADCPRE[1:0] bits according to RCC_PCLK2 value */ + tmpreg |= RCC_PCLK2; + /* Store the new value */ + RCC->CFGR = tmpreg; +} + +#ifdef STM32F10X_CL +/** + * @brief Configures the I2S2 clock source(I2S2CLK). + * @note + * - This function must be called before enabling I2S2 APB clock. + * - This function applies only to STM32 Connectivity line devices. + * @param RCC_I2S2CLKSource: specifies the I2S2 clock source. + * This parameter can be one of the following values: + * @arg RCC_I2S2CLKSource_SYSCLK: system clock selected as I2S2 clock entry + * @arg RCC_I2S2CLKSource_PLL3_VCO: PLL3 VCO clock selected as I2S2 clock entry + * @retval None + */ +void RCC_I2S2CLKConfig(uint32_t RCC_I2S2CLKSource) +{ + /* Check the parameters */ + assert_param(IS_RCC_I2S2CLK_SOURCE(RCC_I2S2CLKSource)); + + *(__IO uint32_t *) CFGR2_I2S2SRC_BB = RCC_I2S2CLKSource; +} + +/** + * @brief Configures the I2S3 clock source(I2S2CLK). + * @note + * - This function must be called before enabling I2S3 APB clock. + * - This function applies only to STM32 Connectivity line devices. + * @param RCC_I2S3CLKSource: specifies the I2S3 clock source. + * This parameter can be one of the following values: + * @arg RCC_I2S3CLKSource_SYSCLK: system clock selected as I2S3 clock entry + * @arg RCC_I2S3CLKSource_PLL3_VCO: PLL3 VCO clock selected as I2S3 clock entry + * @retval None + */ +void RCC_I2S3CLKConfig(uint32_t RCC_I2S3CLKSource) +{ + /* Check the parameters */ + assert_param(IS_RCC_I2S3CLK_SOURCE(RCC_I2S3CLKSource)); + + *(__IO uint32_t *) CFGR2_I2S3SRC_BB = RCC_I2S3CLKSource; +} +#endif /* STM32F10X_CL */ + +/** + * @brief Configures the External Low Speed oscillator (LSE). + * @param RCC_LSE: specifies the new state of the LSE. + * This parameter can be one of the following values: + * @arg RCC_LSE_OFF: LSE oscillator OFF + * @arg RCC_LSE_ON: LSE oscillator ON + * @arg RCC_LSE_Bypass: LSE oscillator bypassed with external clock + * @retval None + */ +void RCC_LSEConfig(uint8_t RCC_LSE) +{ + /* Check the parameters */ + assert_param(IS_RCC_LSE(RCC_LSE)); + /* Reset LSEON and LSEBYP bits before configuring the LSE ------------------*/ + /* Reset LSEON bit */ + *(__IO uint8_t *) BDCR_ADDRESS = RCC_LSE_OFF; + /* Reset LSEBYP bit */ + *(__IO uint8_t *) BDCR_ADDRESS = RCC_LSE_OFF; + /* Configure LSE (RCC_LSE_OFF is already covered by the code section above) */ + switch(RCC_LSE) + { + case RCC_LSE_ON: + /* Set LSEON bit */ + *(__IO uint8_t *) BDCR_ADDRESS = RCC_LSE_ON; + break; + + case RCC_LSE_Bypass: + /* Set LSEBYP and LSEON bits */ + *(__IO uint8_t *) BDCR_ADDRESS = RCC_LSE_Bypass | RCC_LSE_ON; + break; + + default: + break; + } +} + +/** + * @brief Enables or disables the Internal Low Speed oscillator (LSI). + * @note LSI can not be disabled if the IWDG is running. + * @param NewState: new state of the LSI. This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_LSICmd(FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_FUNCTIONAL_STATE(NewState)); + *(__IO uint32_t *) CSR_LSION_BB = (uint32_t)NewState; +} + +/** + * @brief Configures the RTC clock (RTCCLK). + * @note Once the RTC clock is selected it can't be changed unless the Backup domain is reset. + * @param RCC_RTCCLKSource: specifies the RTC clock source. + * This parameter can be one of the following values: + * @arg RCC_RTCCLKSource_LSE: LSE selected as RTC clock + * @arg RCC_RTCCLKSource_LSI: LSI selected as RTC clock + * @arg RCC_RTCCLKSource_HSE_Div128: HSE clock divided by 128 selected as RTC clock + * @retval None + */ +void RCC_RTCCLKConfig(uint32_t RCC_RTCCLKSource) +{ + /* Check the parameters */ + assert_param(IS_RCC_RTCCLK_SOURCE(RCC_RTCCLKSource)); + /* Select the RTC clock source */ + RCC->BDCR |= RCC_RTCCLKSource; +} + +/** + * @brief Enables or disables the RTC clock. + * @note This function must be used only after the RTC clock was selected using the RCC_RTCCLKConfig function. + * @param NewState: new state of the RTC clock. This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_RTCCLKCmd(FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_FUNCTIONAL_STATE(NewState)); + *(__IO uint32_t *) BDCR_RTCEN_BB = (uint32_t)NewState; +} + +/** + * @brief Returns the frequencies of different on chip clocks. + * @param RCC_Clocks: pointer to a RCC_ClocksTypeDef structure which will hold + * the clocks frequencies. + * @note The result of this function could be not correct when using + * fractional value for HSE crystal. + * @retval None + */ +void RCC_GetClocksFreq(RCC_ClocksTypeDef* RCC_Clocks) +{ + uint32_t tmp = 0, pllmull = 0, pllsource = 0, presc = 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 + + /* Get SYSCLK source -------------------------------------------------------*/ + tmp = RCC->CFGR & CFGR_SWS_Mask; + + switch (tmp) + { + case 0x00: /* HSI used as system clock */ + RCC_Clocks->SYSCLK_Frequency = HSI_VALUE; + break; + case 0x04: /* HSE used as system clock */ + RCC_Clocks->SYSCLK_Frequency = HSE_VALUE; + break; + case 0x08: /* PLL used as system clock */ + + /* Get PLL clock source and multiplication factor ----------------------*/ + pllmull = RCC->CFGR & CFGR_PLLMull_Mask; + pllsource = RCC->CFGR & CFGR_PLLSRC_Mask; + +#ifndef STM32F10X_CL + pllmull = ( pllmull >> 18) + 2; + + if (pllsource == 0x00) + {/* HSI oscillator clock divided by 2 selected as PLL clock entry */ + RCC_Clocks->SYSCLK_Frequency = (HSI_VALUE >> 1) * pllmull; + } + else + { + #if defined (STM32F10X_LD_VL) || defined (STM32F10X_MD_VL) || defined (STM32F10X_HD_VL) + prediv1factor = (RCC->CFGR2 & CFGR2_PREDIV1) + 1; + /* HSE oscillator clock selected as PREDIV1 clock entry */ + RCC_Clocks->SYSCLK_Frequency = (HSE_VALUE / prediv1factor) * pllmull; + #else + /* HSE selected as PLL clock entry */ + if ((RCC->CFGR & CFGR_PLLXTPRE_Mask) != (uint32_t)RESET) + {/* HSE oscillator clock divided by 2 */ + RCC_Clocks->SYSCLK_Frequency = (HSE_VALUE >> 1) * pllmull; + } + else + { + RCC_Clocks->SYSCLK_Frequency = 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 */ + RCC_Clocks->SYSCLK_Frequency = (HSI_VALUE >> 1) * pllmull; + } + else + {/* PREDIV1 selected as PLL clock entry */ + + /* Get PREDIV1 clock source and division factor */ + prediv1source = RCC->CFGR2 & CFGR2_PREDIV1SRC; + prediv1factor = (RCC->CFGR2 & CFGR2_PREDIV1) + 1; + + if (prediv1source == 0) + { /* HSE oscillator clock selected as PREDIV1 clock entry */ + RCC_Clocks->SYSCLK_Frequency = (HSE_VALUE / prediv1factor) * pllmull; + } + else + {/* PLL2 clock selected as PREDIV1 clock entry */ + + /* Get PREDIV2 division factor and PLL2 multiplication factor */ + prediv2factor = ((RCC->CFGR2 & CFGR2_PREDIV2) >> 4) + 1; + pll2mull = ((RCC->CFGR2 & CFGR2_PLL2MUL) >> 8 ) + 2; + RCC_Clocks->SYSCLK_Frequency = (((HSE_VALUE / prediv2factor) * pll2mull) / prediv1factor) * pllmull; + } + } +#endif /* STM32F10X_CL */ + break; + + default: + RCC_Clocks->SYSCLK_Frequency = HSI_VALUE; + break; + } + + /* Compute HCLK, PCLK1, PCLK2 and ADCCLK clocks frequencies ----------------*/ + /* Get HCLK prescaler */ + tmp = RCC->CFGR & CFGR_HPRE_Set_Mask; + tmp = tmp >> 4; + presc = APBAHBPrescTable[tmp]; + /* HCLK clock frequency */ + RCC_Clocks->HCLK_Frequency = RCC_Clocks->SYSCLK_Frequency >> presc; + /* Get PCLK1 prescaler */ + tmp = RCC->CFGR & CFGR_PPRE1_Set_Mask; + tmp = tmp >> 8; + presc = APBAHBPrescTable[tmp]; + /* PCLK1 clock frequency */ + RCC_Clocks->PCLK1_Frequency = RCC_Clocks->HCLK_Frequency >> presc; + /* Get PCLK2 prescaler */ + tmp = RCC->CFGR & CFGR_PPRE2_Set_Mask; + tmp = tmp >> 11; + presc = APBAHBPrescTable[tmp]; + /* PCLK2 clock frequency */ + RCC_Clocks->PCLK2_Frequency = RCC_Clocks->HCLK_Frequency >> presc; + /* Get ADCCLK prescaler */ + tmp = RCC->CFGR & CFGR_ADCPRE_Set_Mask; + tmp = tmp >> 14; + presc = ADCPrescTable[tmp]; + /* ADCCLK clock frequency */ + RCC_Clocks->ADCCLK_Frequency = RCC_Clocks->PCLK2_Frequency / presc; +} + +/** + * @brief Enables or disables the AHB peripheral clock. + * @param RCC_AHBPeriph: specifies the AHB peripheral to gates its clock. + * + * For @b STM32_Connectivity_line_devices, this parameter can be any combination + * of the following values: + * @arg RCC_AHBPeriph_DMA1 + * @arg RCC_AHBPeriph_DMA2 + * @arg RCC_AHBPeriph_SRAM + * @arg RCC_AHBPeriph_FLITF + * @arg RCC_AHBPeriph_CRC + * @arg RCC_AHBPeriph_OTG_FS + * @arg RCC_AHBPeriph_ETH_MAC + * @arg RCC_AHBPeriph_ETH_MAC_Tx + * @arg RCC_AHBPeriph_ETH_MAC_Rx + * + * For @b other_STM32_devices, this parameter can be any combination of the + * following values: + * @arg RCC_AHBPeriph_DMA1 + * @arg RCC_AHBPeriph_DMA2 + * @arg RCC_AHBPeriph_SRAM + * @arg RCC_AHBPeriph_FLITF + * @arg RCC_AHBPeriph_CRC + * @arg RCC_AHBPeriph_FSMC + * @arg RCC_AHBPeriph_SDIO + * + * @note SRAM and FLITF clock can be disabled only during sleep mode. + * @param NewState: new state of the specified peripheral clock. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_AHBPeriphClockCmd(uint32_t RCC_AHBPeriph, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_RCC_AHB_PERIPH(RCC_AHBPeriph)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + if (NewState != DISABLE) + { + RCC->AHBENR |= RCC_AHBPeriph; + } + else + { + RCC->AHBENR &= ~RCC_AHBPeriph; + } +} + +/** + * @brief Enables or disables the High Speed APB (APB2) peripheral clock. + * @param RCC_APB2Periph: specifies the APB2 peripheral to gates its clock. + * This parameter can be any combination of the following values: + * @arg RCC_APB2Periph_AFIO, RCC_APB2Periph_GPIOA, RCC_APB2Periph_GPIOB, + * RCC_APB2Periph_GPIOC, RCC_APB2Periph_GPIOD, RCC_APB2Periph_GPIOE, + * RCC_APB2Periph_GPIOF, RCC_APB2Periph_GPIOG, RCC_APB2Periph_ADC1, + * RCC_APB2Periph_ADC2, RCC_APB2Periph_TIM1, RCC_APB2Periph_SPI1, + * RCC_APB2Periph_TIM8, RCC_APB2Periph_USART1, RCC_APB2Periph_ADC3, + * RCC_APB2Periph_TIM15, RCC_APB2Periph_TIM16, RCC_APB2Periph_TIM17, + * RCC_APB2Periph_TIM9, RCC_APB2Periph_TIM10, RCC_APB2Periph_TIM11 + * @param NewState: new state of the specified peripheral clock. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_APB2PeriphClockCmd(uint32_t RCC_APB2Periph, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_RCC_APB2_PERIPH(RCC_APB2Periph)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + if (NewState != DISABLE) + { + RCC->APB2ENR |= RCC_APB2Periph; + } + else + { + RCC->APB2ENR &= ~RCC_APB2Periph; + } +} + +/** + * @brief Enables or disables the Low Speed APB (APB1) peripheral clock. + * @param RCC_APB1Periph: specifies the APB1 peripheral to gates its clock. + * This parameter can be any combination of the following values: + * @arg RCC_APB1Periph_TIM2, RCC_APB1Periph_TIM3, RCC_APB1Periph_TIM4, + * RCC_APB1Periph_TIM5, RCC_APB1Periph_TIM6, RCC_APB1Periph_TIM7, + * RCC_APB1Periph_WWDG, RCC_APB1Periph_SPI2, RCC_APB1Periph_SPI3, + * RCC_APB1Periph_USART2, RCC_APB1Periph_USART3, RCC_APB1Periph_USART4, + * RCC_APB1Periph_USART5, RCC_APB1Periph_I2C1, RCC_APB1Periph_I2C2, + * RCC_APB1Periph_USB, RCC_APB1Periph_CAN1, RCC_APB1Periph_BKP, + * RCC_APB1Periph_PWR, RCC_APB1Periph_DAC, RCC_APB1Periph_CEC, + * RCC_APB1Periph_TIM12, RCC_APB1Periph_TIM13, RCC_APB1Periph_TIM14 + * @param NewState: new state of the specified peripheral clock. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_APB1PeriphClockCmd(uint32_t RCC_APB1Periph, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_RCC_APB1_PERIPH(RCC_APB1Periph)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + if (NewState != DISABLE) + { + RCC->APB1ENR |= RCC_APB1Periph; + } + else + { + RCC->APB1ENR &= ~RCC_APB1Periph; + } +} + +#ifdef STM32F10X_CL +/** + * @brief Forces or releases AHB peripheral reset. + * @note This function applies only to STM32 Connectivity line devices. + * @param RCC_AHBPeriph: specifies the AHB peripheral to reset. + * This parameter can be any combination of the following values: + * @arg RCC_AHBPeriph_OTG_FS + * @arg RCC_AHBPeriph_ETH_MAC + * @param NewState: new state of the specified peripheral reset. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_AHBPeriphResetCmd(uint32_t RCC_AHBPeriph, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_RCC_AHB_PERIPH_RESET(RCC_AHBPeriph)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + + if (NewState != DISABLE) + { + RCC->AHBRSTR |= RCC_AHBPeriph; + } + else + { + RCC->AHBRSTR &= ~RCC_AHBPeriph; + } +} +#endif /* STM32F10X_CL */ + +/** + * @brief Forces or releases High Speed APB (APB2) peripheral reset. + * @param RCC_APB2Periph: specifies the APB2 peripheral to reset. + * This parameter can be any combination of the following values: + * @arg RCC_APB2Periph_AFIO, RCC_APB2Periph_GPIOA, RCC_APB2Periph_GPIOB, + * RCC_APB2Periph_GPIOC, RCC_APB2Periph_GPIOD, RCC_APB2Periph_GPIOE, + * RCC_APB2Periph_GPIOF, RCC_APB2Periph_GPIOG, RCC_APB2Periph_ADC1, + * RCC_APB2Periph_ADC2, RCC_APB2Periph_TIM1, RCC_APB2Periph_SPI1, + * RCC_APB2Periph_TIM8, RCC_APB2Periph_USART1, RCC_APB2Periph_ADC3, + * RCC_APB2Periph_TIM15, RCC_APB2Periph_TIM16, RCC_APB2Periph_TIM17, + * RCC_APB2Periph_TIM9, RCC_APB2Periph_TIM10, RCC_APB2Periph_TIM11 + * @param NewState: new state of the specified peripheral reset. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_APB2PeriphResetCmd(uint32_t RCC_APB2Periph, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_RCC_APB2_PERIPH(RCC_APB2Periph)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + if (NewState != DISABLE) + { + RCC->APB2RSTR |= RCC_APB2Periph; + } + else + { + RCC->APB2RSTR &= ~RCC_APB2Periph; + } +} + +/** + * @brief Forces or releases Low Speed APB (APB1) peripheral reset. + * @param RCC_APB1Periph: specifies the APB1 peripheral to reset. + * This parameter can be any combination of the following values: + * @arg RCC_APB1Periph_TIM2, RCC_APB1Periph_TIM3, RCC_APB1Periph_TIM4, + * RCC_APB1Periph_TIM5, RCC_APB1Periph_TIM6, RCC_APB1Periph_TIM7, + * RCC_APB1Periph_WWDG, RCC_APB1Periph_SPI2, RCC_APB1Periph_SPI3, + * RCC_APB1Periph_USART2, RCC_APB1Periph_USART3, RCC_APB1Periph_USART4, + * RCC_APB1Periph_USART5, RCC_APB1Periph_I2C1, RCC_APB1Periph_I2C2, + * RCC_APB1Periph_USB, RCC_APB1Periph_CAN1, RCC_APB1Periph_BKP, + * RCC_APB1Periph_PWR, RCC_APB1Periph_DAC, RCC_APB1Periph_CEC, + * RCC_APB1Periph_TIM12, RCC_APB1Periph_TIM13, RCC_APB1Periph_TIM14 + * @param NewState: new state of the specified peripheral clock. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_APB1PeriphResetCmd(uint32_t RCC_APB1Periph, FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_RCC_APB1_PERIPH(RCC_APB1Periph)); + assert_param(IS_FUNCTIONAL_STATE(NewState)); + if (NewState != DISABLE) + { + RCC->APB1RSTR |= RCC_APB1Periph; + } + else + { + RCC->APB1RSTR &= ~RCC_APB1Periph; + } +} + +/** + * @brief Forces or releases the Backup domain reset. + * @param NewState: new state of the Backup domain reset. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_BackupResetCmd(FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_FUNCTIONAL_STATE(NewState)); + *(__IO uint32_t *) BDCR_BDRST_BB = (uint32_t)NewState; +} + +/** + * @brief Enables or disables the Clock Security System. + * @param NewState: new state of the Clock Security System.. + * This parameter can be: ENABLE or DISABLE. + * @retval None + */ +void RCC_ClockSecuritySystemCmd(FunctionalState NewState) +{ + /* Check the parameters */ + assert_param(IS_FUNCTIONAL_STATE(NewState)); + *(__IO uint32_t *) CR_CSSON_BB = (uint32_t)NewState; +} + +/** + * @brief Selects the clock source to output on MCO pin. + * @param RCC_MCO: specifies the clock source to output. + * + * For @b STM32_Connectivity_line_devices, this parameter can be one of the + * following values: + * @arg RCC_MCO_NoClock: No clock selected + * @arg RCC_MCO_SYSCLK: System clock selected + * @arg RCC_MCO_HSI: HSI oscillator clock selected + * @arg RCC_MCO_HSE: HSE oscillator clock selected + * @arg RCC_MCO_PLLCLK_Div2: PLL clock divided by 2 selected + * @arg RCC_MCO_PLL2CLK: PLL2 clock selected + * @arg RCC_MCO_PLL3CLK_Div2: PLL3 clock divided by 2 selected + * @arg RCC_MCO_XT1: External 3-25 MHz oscillator clock selected + * @arg RCC_MCO_PLL3CLK: PLL3 clock selected + * + * For @b other_STM32_devices, this parameter can be one of the following values: + * @arg RCC_MCO_NoClock: No clock selected + * @arg RCC_MCO_SYSCLK: System clock selected + * @arg RCC_MCO_HSI: HSI oscillator clock selected + * @arg RCC_MCO_HSE: HSE oscillator clock selected + * @arg RCC_MCO_PLLCLK_Div2: PLL clock divided by 2 selected + * + * @retval None + */ +void RCC_MCOConfig(uint8_t RCC_MCO) +{ + /* Check the parameters */ + assert_param(IS_RCC_MCO(RCC_MCO)); + + /* Perform Byte access to MCO bits to select the MCO source */ + *(__IO uint8_t *) CFGR_BYTE4_ADDRESS = RCC_MCO; +} + +/** + * @brief Checks whether the specified RCC flag is set or not. + * @param RCC_FLAG: specifies the flag to check. + * + * For @b STM32_Connectivity_line_devices, this parameter can be one of the + * following values: + * @arg RCC_FLAG_HSIRDY: HSI oscillator clock ready + * @arg RCC_FLAG_HSERDY: HSE oscillator clock ready + * @arg RCC_FLAG_PLLRDY: PLL clock ready + * @arg RCC_FLAG_PLL2RDY: PLL2 clock ready + * @arg RCC_FLAG_PLL3RDY: PLL3 clock ready + * @arg RCC_FLAG_LSERDY: LSE oscillator clock ready + * @arg RCC_FLAG_LSIRDY: LSI oscillator clock ready + * @arg RCC_FLAG_PINRST: Pin reset + * @arg RCC_FLAG_PORRST: POR/PDR reset + * @arg RCC_FLAG_SFTRST: Software reset + * @arg RCC_FLAG_IWDGRST: Independent Watchdog reset + * @arg RCC_FLAG_WWDGRST: Window Watchdog reset + * @arg RCC_FLAG_LPWRRST: Low Power reset + * + * For @b other_STM32_devices, this parameter can be one of the following values: + * @arg RCC_FLAG_HSIRDY: HSI oscillator clock ready + * @arg RCC_FLAG_HSERDY: HSE oscillator clock ready + * @arg RCC_FLAG_PLLRDY: PLL clock ready + * @arg RCC_FLAG_LSERDY: LSE oscillator clock ready + * @arg RCC_FLAG_LSIRDY: LSI oscillator clock ready + * @arg RCC_FLAG_PINRST: Pin reset + * @arg RCC_FLAG_PORRST: POR/PDR reset + * @arg RCC_FLAG_SFTRST: Software reset + * @arg RCC_FLAG_IWDGRST: Independent Watchdog reset + * @arg RCC_FLAG_WWDGRST: Window Watchdog reset + * @arg RCC_FLAG_LPWRRST: Low Power reset + * + * @retval The new state of RCC_FLAG (SET or RESET). + */ +FlagStatus RCC_GetFlagStatus(uint8_t RCC_FLAG) +{ + uint32_t tmp = 0; + uint32_t statusreg = 0; + FlagStatus bitstatus = RESET; + /* Check the parameters */ + assert_param(IS_RCC_FLAG(RCC_FLAG)); + + /* Get the RCC register index */ + tmp = RCC_FLAG >> 5; + if (tmp == 1) /* The flag to check is in CR register */ + { + statusreg = RCC->CR; + } + else if (tmp == 2) /* The flag to check is in BDCR register */ + { + statusreg = RCC->BDCR; + } + else /* The flag to check is in CSR register */ + { + statusreg = RCC->CSR; + } + + /* Get the flag position */ + tmp = RCC_FLAG & FLAG_Mask; + if ((statusreg & ((uint32_t)1 << tmp)) != (uint32_t)RESET) + { + bitstatus = SET; + } + else + { + bitstatus = RESET; + } + + /* Return the flag status */ + return bitstatus; +} + +/** + * @brief Clears the RCC reset flags. + * @note The reset flags are: RCC_FLAG_PINRST, RCC_FLAG_PORRST, RCC_FLAG_SFTRST, + * RCC_FLAG_IWDGRST, RCC_FLAG_WWDGRST, RCC_FLAG_LPWRRST + * @param None + * @retval None + */ +void RCC_ClearFlag(void) +{ + /* Set RMVF bit to clear the reset flags */ + RCC->CSR |= CSR_RMVF_Set; +} + +/** + * @brief Checks whether the specified RCC interrupt has occurred or not. + * @param RCC_IT: specifies the RCC interrupt source to check. + * + * For @b STM32_Connectivity_line_devices, this parameter can be one of the + * following values: + * @arg RCC_IT_LSIRDY: LSI ready interrupt + * @arg RCC_IT_LSERDY: LSE ready interrupt + * @arg RCC_IT_HSIRDY: HSI ready interrupt + * @arg RCC_IT_HSERDY: HSE ready interrupt + * @arg RCC_IT_PLLRDY: PLL ready interrupt + * @arg RCC_IT_PLL2RDY: PLL2 ready interrupt + * @arg RCC_IT_PLL3RDY: PLL3 ready interrupt + * @arg RCC_IT_CSS: Clock Security System interrupt + * + * For @b other_STM32_devices, this parameter can be one of the following values: + * @arg RCC_IT_LSIRDY: LSI ready interrupt + * @arg RCC_IT_LSERDY: LSE ready interrupt + * @arg RCC_IT_HSIRDY: HSI ready interrupt + * @arg RCC_IT_HSERDY: HSE ready interrupt + * @arg RCC_IT_PLLRDY: PLL ready interrupt + * @arg RCC_IT_CSS: Clock Security System interrupt + * + * @retval The new state of RCC_IT (SET or RESET). + */ +ITStatus RCC_GetITStatus(uint8_t RCC_IT) +{ + ITStatus bitstatus = RESET; + /* Check the parameters */ + assert_param(IS_RCC_GET_IT(RCC_IT)); + + /* Check the status of the specified RCC interrupt */ + if ((RCC->CIR & RCC_IT) != (uint32_t)RESET) + { + bitstatus = SET; + } + else + { + bitstatus = RESET; + } + + /* Return the RCC_IT status */ + return bitstatus; +} + +/** + * @brief Clears the RCC's interrupt pending bits. + * @param RCC_IT: specifies the interrupt pending bit to clear. + * + * For @b STM32_Connectivity_line_devices, this parameter can be any combination + * of the following values: + * @arg RCC_IT_LSIRDY: LSI ready interrupt + * @arg RCC_IT_LSERDY: LSE ready interrupt + * @arg RCC_IT_HSIRDY: HSI ready interrupt + * @arg RCC_IT_HSERDY: HSE ready interrupt + * @arg RCC_IT_PLLRDY: PLL ready interrupt + * @arg RCC_IT_PLL2RDY: PLL2 ready interrupt + * @arg RCC_IT_PLL3RDY: PLL3 ready interrupt + * @arg RCC_IT_CSS: Clock Security System interrupt + * + * For @b other_STM32_devices, this parameter can be any combination of the + * following values: + * @arg RCC_IT_LSIRDY: LSI ready interrupt + * @arg RCC_IT_LSERDY: LSE ready interrupt + * @arg RCC_IT_HSIRDY: HSI ready interrupt + * @arg RCC_IT_HSERDY: HSE ready interrupt + * @arg RCC_IT_PLLRDY: PLL ready interrupt + * + * @arg RCC_IT_CSS: Clock Security System interrupt + * @retval None + */ +void RCC_ClearITPendingBit(uint8_t RCC_IT) +{ + /* Check the parameters */ + assert_param(IS_RCC_CLEAR_IT(RCC_IT)); + + /* Perform Byte access to RCC_CIR[23:16] bits to clear the selected interrupt + pending bits */ + *(__IO uint8_t *) CIR_BYTE3_ADDRESS = RCC_IT; +} + +/** + * @} + */ + +/** + * @} + */ + +/** + * @} + */ + +/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/