/********************************** (C) COPYRIGHT ******************************* * File Name : ch32f20x_rcc.c * Author : WCH * Version : V1.0.0 * Date : 2021/08/08 * Description : This file provides all the RCC firmware functions. *******************************************************************************/ #include "ch32f20x_rcc.h" /* RCC registers bit address in the alias region */ #define RCC_OFFSET (RCC_BASE - PERIPH_BASE) /* CFGR0 Register */ /* Alias word address of USBPRE bit */ #define CFGR0_OFFSET (RCC_OFFSET + 0x04) #define USBPRE_BitNumber 0x16 #define CFGR0_USBPRE_BB (PERIPH_BB_BASE + (CFGR0_OFFSET * 32) + (USBPRE_BitNumber * 4)) /* BDCTLR Register */ #define BDCTLR_OFFSET (RCC_OFFSET + 0x20) /* RCC registers bit mask */ /* CTLR register bit mask */ #define CTLR_HSEBYP_Reset ((uint32_t)0xFFFBFFFF) #define CTLR_HSEBYP_Set ((uint32_t)0x00040000) #define CTLR_HSEON_Reset ((uint32_t)0xFFFEFFFF) #define CTLR_HSEON_Set ((uint32_t)0x00010000) #define CTLR_HSITRIM_Mask ((uint32_t)0xFFFFFF07) #define CFGR0_PLL_Mask ((uint32_t)0xFFC0FFFF) #define CFGR0_PLLMull_Mask ((uint32_t)0x003C0000) #define CFGR0_PLLSRC_Mask ((uint32_t)0x00010000) #define CFGR0_PLLXTPRE_Mask ((uint32_t)0x00020000) #define CFGR0_SWS_Mask ((uint32_t)0x0000000C) #define CFGR0_SW_Mask ((uint32_t)0xFFFFFFFC) #define CFGR0_HPRE_Reset_Mask ((uint32_t)0xFFFFFF0F) #define CFGR0_HPRE_Set_Mask ((uint32_t)0x000000F0) #define CFGR0_PPRE1_Reset_Mask ((uint32_t)0xFFFFF8FF) #define CFGR0_PPRE1_Set_Mask ((uint32_t)0x00000700) #define CFGR0_PPRE2_Reset_Mask ((uint32_t)0xFFFFC7FF) #define CFGR0_PPRE2_Set_Mask ((uint32_t)0x00003800) #define CFGR0_ADCPRE_Reset_Mask ((uint32_t)0xFFFF3FFF) #define CFGR0_ADCPRE_Set_Mask ((uint32_t)0x0000C000) /* RSTSCKR register bit mask */ #define RSTSCKR_RMVF_Set ((uint32_t)0x01000000) /* CFGR2 register bit mask */ #define CFGR2_PREDIV1SRC ((uint32_t)0x00010000) #define CFGR2_PREDIV1 ((uint32_t)0x0000000F) #define CFGR2_PREDIV2 ((uint32_t)0x000000F0) #define CFGR2_PLL2MUL ((uint32_t)0x00000F00) #define CFGR2_PLL3MUL ((uint32_t)0x0000F000) /* RCC Flag Mask */ #define FLAG_Mask ((uint8_t)0x1F) /* INTR register byte 2 (Bits[15:8]) base address */ #define INTR_BYTE2_ADDRESS ((uint32_t)0x40021009) /* INTR register byte 3 (Bits[23:16]) base address */ #define INTR_BYTE3_ADDRESS ((uint32_t)0x4002100A) /* CFGR0 register byte 4 (Bits[31:24]) base address */ #define CFGR0_BYTE4_ADDRESS ((uint32_t)0x40021007) /* BDCTLR register base address */ #define BDCTLR_ADDRESS (PERIPH_BASE + BDCTLR_OFFSET) 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}; /******************************************************************************* * Function Name : RCC_DeInit * Description : Resets the RCC clock configuration to the default reset state. * Input : None * Return : None *******************************************************************************/ void RCC_DeInit(void) { RCC->CTLR |= (uint32_t)0x00000001; RCC->CFGR0 &= (uint32_t)0xF8FF0000; RCC->CTLR &= (uint32_t)0xFEF6FFFF; RCC->CTLR &= (uint32_t)0xFFFBFFFF; RCC->CFGR0 &= (uint32_t)0xFF80FFFF; RCC->INTR = 0x009F0000; } /******************************************************************************* * Function Name : RCC_HSEConfig * Description : Configures the External High Speed oscillator (HSE). * Input : RCC_HSE: * RCC_HSE_OFF: HSE oscillator OFF. * RCC_HSE_ON: HSE oscillator ON. * RCC_HSE_Bypass: HSE oscillator bypassed with external clock. * Return : None *******************************************************************************/ void RCC_HSEConfig(uint32_t RCC_HSE) { RCC->CTLR &= CTLR_HSEON_Reset; RCC->CTLR &= CTLR_HSEBYP_Reset; switch(RCC_HSE) { case RCC_HSE_ON: RCC->CTLR |= CTLR_HSEON_Set; break; case RCC_HSE_Bypass: RCC->CTLR |= CTLR_HSEBYP_Set | CTLR_HSEON_Set; break; default: break; } } /******************************************************************************* * Function Name : RCC_WaitForHSEStartUp * Description : Waits for HSE start-up. * Input : None * Return : 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; 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); } /******************************************************************************* * Function Name : RCC_AdjustHSICalibrationValue * Description : Adjusts the Internal High Speed oscillator (HSI) calibration value. * Input : HSICalibrationValue: specifies the calibration trimming value. * This parameter must be a number between 0 and 0x1F. * Return : None *******************************************************************************/ void RCC_AdjustHSICalibrationValue(uint8_t HSICalibrationValue) { uint32_t tmpreg = 0; tmpreg = RCC->CTLR; tmpreg &= CTLR_HSITRIM_Mask; tmpreg |= (uint32_t)HSICalibrationValue << 3; RCC->CTLR = tmpreg; } /******************************************************************************* * Function Name : RCC_HSICmd * Description : Enables or disables the Internal High Speed oscillator (HSI). * Input : NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_HSICmd(FunctionalState NewState) { if(NewState) { RCC->CTLR |= ((uint32_t)1<<0); } else{ RCC->CTLR &= ~((uint32_t)1<<0); } } /******************************************************************************* * Function Name : RCC_PLLConfig * Description : Configures the PLL clock source and multiplication factor. * Input : RCC_PLLSource: specifies the PLL entry clock source. * RCC_PLLSource_HSI_Div2: HSI oscillator clock divided by 2 * selected as PLL clock entry. * RCC_PLLSource_HSE_Div1: HSE oscillator clock selected as PLL * clock entry. * RCC_PLLSource_HSE_Div2: HSE oscillator clock divided by 2 * selected as PLL clock entry. * RCC_PLLMul: specifies the PLL multiplication factor. * This parameter can be RCC_PLLMul_x where x:[2,16]. * For CH32F207: * RCC_PLLMul_18_EXTEN * RCC_PLLMul_3_EXTEN * RCC_PLLMul_4_EXTEN * RCC_PLLMul_5_EXTEN * RCC_PLLMul_6_EXTEN * RCC_PLLMul_7_EXTEN * RCC_PLLMul_8_EXTEN * RCC_PLLMul_9_EXTEN * RCC_PLLMul_10_EXTEN * RCC_PLLMul_11_EXTEN * RCC_PLLMul_12_EXTEN * RCC_PLLMul_13_EXTEN * RCC_PLLMul_14_EXTEN * RCC_PLLMul_6_5_EXTEN * RCC_PLLMul_15_EXTEN * RCC_PLLMul_16_EXTEN * For other CH32F20x: * RCC_PLLMul_2 * RCC_PLLMul_3 * RCC_PLLMul_4 * RCC_PLLMul_5 * RCC_PLLMul_6 * RCC_PLLMul_7 * RCC_PLLMul_8 * RCC_PLLMul_9 * RCC_PLLMul_10 * RCC_PLLMul_11 * RCC_PLLMul_12 * RCC_PLLMul_13 * RCC_PLLMul_14 * RCC_PLLMul_15 * RCC_PLLMul_16 * RCC_PLLMul_18 * Return : None *******************************************************************************/ void RCC_PLLConfig(uint32_t RCC_PLLSource, uint32_t RCC_PLLMul) { uint32_t tmpreg = 0; tmpreg = RCC->CFGR0; tmpreg &= CFGR0_PLL_Mask; tmpreg |= RCC_PLLSource | RCC_PLLMul; RCC->CFGR0 = tmpreg; } /******************************************************************************* * Function Name : RCC_PLLCmd * Description : Enables or disables the PLL. * Input : NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_PLLCmd(FunctionalState NewState) { if(NewState) { RCC->CTLR |= ((uint32_t)1<<24); } else{ RCC->CTLR &= ~((uint32_t)1<<24); } } /******************************************************************************* * Function Name : RCC_SYSCLKConfig * Description : Configures the system clock (SYSCLK). * Input : RCC_SYSCLKSource: specifies the clock source used as system clock. * RCC_SYSCLKSource_HSI: HSI selected as system clock. * RCC_SYSCLKSource_HSE: HSE selected as system clock. * RCC_SYSCLKSource_PLLCLK: PLL selected as system clock. * Return : None *******************************************************************************/ void RCC_SYSCLKConfig(uint32_t RCC_SYSCLKSource) { uint32_t tmpreg = 0; tmpreg = RCC->CFGR0; tmpreg &= CFGR0_SW_Mask; tmpreg |= RCC_SYSCLKSource; RCC->CFGR0 = tmpreg; } /******************************************************************************* * Function Name : RCC_GetSYSCLKSource * Description : Returns the clock source used as system clock. * Input : None * Return : 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->CFGR0 & CFGR0_SWS_Mask)); } /******************************************************************************* * Function Name : RCC_HCLKConfig * Description : Configures the AHB clock (HCLK). * Input : RCC_SYSCLK: defines the AHB clock divider. This clock is derived from * the system clock (SYSCLK). * RCC_SYSCLK_Div1: AHB clock = SYSCLK. * RCC_SYSCLK_Div2: AHB clock = SYSCLK/2. * RCC_SYSCLK_Div4: AHB clock = SYSCLK/4. * RCC_SYSCLK_Div8: AHB clock = SYSCLK/8. * RCC_SYSCLK_Div16: AHB clock = SYSCLK/16. * RCC_SYSCLK_Div64: AHB clock = SYSCLK/64. * RCC_SYSCLK_Div128: AHB clock = SYSCLK/128. * RCC_SYSCLK_Div256: AHB clock = SYSCLK/256. * RCC_SYSCLK_Div512: AHB clock = SYSCLK/512. * Return : None *******************************************************************************/ void RCC_HCLKConfig(uint32_t RCC_SYSCLK) { uint32_t tmpreg = 0; tmpreg = RCC->CFGR0; tmpreg &= CFGR0_HPRE_Reset_Mask; tmpreg |= RCC_SYSCLK; RCC->CFGR0 = tmpreg; } /******************************************************************************* * Function Name : RCC_PCLK1Config * Description : Configures the Low Speed APB clock (PCLK1). * Input : RCC_HCLK: defines the APB1 clock divider. This clock is derived from * the AHB clock (HCLK). * RCC_HCLK_Div1: APB1 clock = HCLK. * RCC_HCLK_Div2: APB1 clock = HCLK/2. * RCC_HCLK_Div4: APB1 clock = HCLK/4. * RCC_HCLK_Div8: APB1 clock = HCLK/8. * RCC_HCLK_Div16: APB1 clock = HCLK/16. * Return : None *******************************************************************************/ void RCC_PCLK1Config(uint32_t RCC_HCLK) { uint32_t tmpreg = 0; tmpreg = RCC->CFGR0; tmpreg &= CFGR0_PPRE1_Reset_Mask; tmpreg |= RCC_HCLK; RCC->CFGR0 = tmpreg; } /******************************************************************************* * Function Name : RCC_PCLK2Config * Description : Configures the High Speed APB clock (PCLK2). * Input : RCC_HCLK: defines the APB2 clock divider. This clock is derived from * the AHB clock (HCLK). * RCC_HCLK_Div1: APB2 clock = HCLK. * RCC_HCLK_Div2: APB2 clock = HCLK/2. * RCC_HCLK_Div4: APB2 clock = HCLK/4. * RCC_HCLK_Div8: APB2 clock = HCLK/8. * RCC_HCLK_Div16: APB2 clock = HCLK/16. * Return : None *******************************************************************************/ void RCC_PCLK2Config(uint32_t RCC_HCLK) { uint32_t tmpreg = 0; tmpreg = RCC->CFGR0; tmpreg &= CFGR0_PPRE2_Reset_Mask; tmpreg |= RCC_HCLK << 3; RCC->CFGR0 = tmpreg; } /******************************************************************************* * Function Name : RCC_ITConfig * Description : Enables or disables the specified RCC interrupts. * Input : RCC_IT: specifies the RCC interrupt sources to be enabled or disabled. * RCC_IT_LSIRDY: LSI ready interrupt. * RCC_IT_LSERDY: LSE ready interrupt. * RCC_IT_HSIRDY: HSI ready interrupt. * RCC_IT_HSERDY: HSE ready interrupt. * RCC_IT_PLLRDY: PLL ready interrupt. * NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_ITConfig(uint8_t RCC_IT, FunctionalState NewState) { if (NewState != DISABLE) { *(__IO uint8_t *) INTR_BYTE2_ADDRESS |= RCC_IT; } else { *(__IO uint8_t *) INTR_BYTE2_ADDRESS &= (uint8_t)~RCC_IT; } } /******************************************************************************* * Function Name : RCC_USBCLKConfig * Description : Configures the USB clock (USBCLK). * Input : RCC_USBCLKSource: specifies the USB clock source. This clock is * derived from the PLL output. * RCC_USBCLKSource_PLLCLK_Div1: PLL clock selected as USB clock source(48Mhz). * RCC_USBCLKSource_PLLCLK_Div2: PLL clock selected as USB clock source(96MHz). * RCC_USBCLKSource_PLLCLK_Div3: PLL clock selected as USB clock source(144MHz). * Return : None *******************************************************************************/ void RCC_USBCLKConfig(uint32_t RCC_USBCLKSource) { RCC->CFGR0 &= ~((uint32_t)3<<22); RCC->CFGR0 |= RCC_USBCLKSource<<22; } /******************************************************************************* * Function Name : RCC_ADCCLKConfig * Description : Configures the ADC clock (ADCCLK). * Input : RCC_PCLK2: defines the ADC clock divider. This clock is derived from * the APB2 clock (PCLK2). * RCC_PCLK2_Div2: ADC clock = PCLK2/2. * RCC_PCLK2_Div4: ADC clock = PCLK2/4. * RCC_PCLK2_Div6: ADC clock = PCLK2/6. * RCC_PCLK2_Div8: ADC clock = PCLK2/8. * Return : None ********************************************************************************/ void RCC_ADCCLKConfig(uint32_t RCC_PCLK2) { uint32_t tmpreg = 0; tmpreg = RCC->CFGR0; tmpreg &= CFGR0_ADCPRE_Reset_Mask; tmpreg |= RCC_PCLK2; RCC->CFGR0 = tmpreg; } /******************************************************************************* * Function Name : RCC_LSEConfig * Description : Configures the External Low Speed oscillator (LSE). * Input : RCC_LSE: specifies the new state of the LSE. * RCC_LSE_OFF: LSE oscillator OFF. * RCC_LSE_ON: LSE oscillator ON. * RCC_LSE_Bypass: LSE oscillator bypassed with external clock. * Return : None ********************************************************************************/ void RCC_LSEConfig(uint8_t RCC_LSE) { *(__IO uint8_t *) BDCTLR_ADDRESS = RCC_LSE_OFF; *(__IO uint8_t *) BDCTLR_ADDRESS = RCC_LSE_OFF; switch(RCC_LSE) { case RCC_LSE_ON: *(__IO uint8_t *) BDCTLR_ADDRESS = RCC_LSE_ON; break; case RCC_LSE_Bypass: *(__IO uint8_t *) BDCTLR_ADDRESS = RCC_LSE_Bypass | RCC_LSE_ON; break; default: break; } } /******************************************************************************* * Function Name : RCC_LSICmd * Description : Enables or disables the Internal Low Speed oscillator (LSI). * Input : NewState: ENABLE or DISABLE. * Return : None ********************************************************************************/ void RCC_LSICmd(FunctionalState NewState) { if(NewState) { RCC->RSTSCKR |= ((uint32_t)1<<0); } else{ RCC->RSTSCKR &= ~((uint32_t)1<<0); } } /******************************************************************************* * Function Name : RCC_RTCCLKConfig * Description : Once the RTC clock is selected it can't be changed unless the Backup domain is reset. * Input : RCC_RTCCLKSource: specifies the RTC clock source. * RCC_RTCCLKSource_LSE: LSE selected as RTC clock. * RCC_RTCCLKSource_LSI: LSI selected as RTC clock. * RCC_RTCCLKSource_HSE_Div128: HSE clock divided by 128 selected as RTC clock. * Return : None ********************************************************************************/ void RCC_RTCCLKConfig(uint32_t RCC_RTCCLKSource) { RCC->BDCTLR |= RCC_RTCCLKSource; } /******************************************************************************* * Function Name : RCC_RTCCLKCmd * Description : This function must be used only after the RTC clock was selected * using the RCC_RTCCLKConfig function. * Input : NewState: ENABLE or DISABLE. * Return : None ********************************************************************************/ void RCC_RTCCLKCmd(FunctionalState NewState) { if(NewState) { RCC->BDCTLR |= ((uint32_t)1<<15); } else{ RCC->BDCTLR &= ~((uint32_t)1<<15); } } /******************************************************************************* * Function Name : RCC_GetClocksFreq * Description : The result of this function could be not correct when using * fractional value for HSE crystal. * Input : RCC_Clocks: pointer to a RCC_ClocksTypeDef structure which will hold * the clocks frequencies. * Return : None ********************************************************************************/ void RCC_GetClocksFreq(RCC_ClocksTypeDef* RCC_Clocks) { uint32_t tmp = 0, pllmull = 0, pllsource = 0, presc = 0, Pll_6_5 = 0; tmp = RCC->CFGR0 & CFGR0_SWS_Mask; switch (tmp) { case 0x00: RCC_Clocks->SYSCLK_Frequency = HSI_VALUE; break; case 0x04: RCC_Clocks->SYSCLK_Frequency = HSE_VALUE; break; case 0x08: pllmull = RCC->CFGR0 & CFGR0_PLLMull_Mask; pllsource = RCC->CFGR0 & CFGR0_PLLSRC_Mask; pllmull = ( pllmull >> 18) + 2; if(((*(uint32_t*)0x1FFFF70C) & (1<<14)) != (1<<14)){ /* for other CH32F20x */ if(pllmull == 17) pllmull = 18; } else{ /* for CH32F207 */ if(pllmull == 2) pllmull = 18; if(pllmull == 15){ pllmull = 13; /* *6.5 */ Pll_6_5 = 1; } if(pllmull == 16) pllmull = 15; if(pllmull == 17) pllmull = 16; } if (pllsource == 0x00) { if(EXTEN->EXTEN_CTR & EXTEN_PLL_HSI_PRE){ RCC_Clocks->SYSCLK_Frequency = (HSI_VALUE) * pllmull; } else{ RCC_Clocks->SYSCLK_Frequency = (HSI_VALUE >>1) * pllmull; } } else { if ((RCC->CFGR0 & CFGR0_PLLXTPRE_Mask) != (uint32_t)RESET) { RCC_Clocks->SYSCLK_Frequency = (HSE_VALUE >> 1) * pllmull; } else { RCC_Clocks->SYSCLK_Frequency = HSE_VALUE * pllmull; } } if(Pll_6_5 == 1) RCC_Clocks->SYSCLK_Frequency = (RCC_Clocks->SYSCLK_Frequency / 2); break; default: RCC_Clocks->SYSCLK_Frequency = HSI_VALUE; break; } tmp = RCC->CFGR0 & CFGR0_HPRE_Set_Mask; tmp = tmp >> 4; presc = APBAHBPrescTable[tmp]; RCC_Clocks->HCLK_Frequency = RCC_Clocks->SYSCLK_Frequency >> presc; tmp = RCC->CFGR0 & CFGR0_PPRE1_Set_Mask; tmp = tmp >> 8; presc = APBAHBPrescTable[tmp]; RCC_Clocks->PCLK1_Frequency = RCC_Clocks->HCLK_Frequency >> presc; tmp = RCC->CFGR0 & CFGR0_PPRE2_Set_Mask; tmp = tmp >> 11; presc = APBAHBPrescTable[tmp]; RCC_Clocks->PCLK2_Frequency = RCC_Clocks->HCLK_Frequency >> presc; tmp = RCC->CFGR0 & CFGR0_ADCPRE_Set_Mask; tmp = tmp >> 14; presc = ADCPrescTable[tmp]; RCC_Clocks->ADCCLK_Frequency = RCC_Clocks->PCLK2_Frequency / presc; } /******************************************************************************* * Function Name : RCC_AHBPeriphClockCmd * Description : Enables or disables the AHB peripheral clock. * Input : RCC_AHBPeriph: specifies the AHB peripheral to gates its clock. * RCC_AHBPeriph_DMA1. * RCC_AHBPeriph_DMA2. * RCC_AHBPeriph_SRAM. * RCC_AHBPeriph_FLITF. * RCC_AHBPeriph_CRC. * RCC_AHBPeriph_FSMC * RCC_AHBPeriph_RNG * RCC_AHBPeriph_SDIO * RCC_AHBPeriph_USBHS * RCC_AHBPeriph_USBOTG * RCC_AHBPeriph_DVP * RCC_AHBPeriph_ETH_MAC * RCC_AHBPeriph_ETH_MAC_Tx * RCC_AHBPeriph_ETH_MAC_Rx * NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_AHBPeriphClockCmd(uint32_t RCC_AHBPeriph, FunctionalState NewState) { if (NewState != DISABLE) { RCC->AHBPCENR |= RCC_AHBPeriph; } else { RCC->AHBPCENR &= ~RCC_AHBPeriph; } } /******************************************************************************* * Function Name : RCC_APB2PeriphClockCmd * Description : Enables or disables the High Speed APB (APB2) peripheral clock. * Input : RCC_APB2Periph: specifies the APB2 peripheral to gates its clock. * RCC_APB2Periph_AFIO. * RCC_APB2Periph_GPIOA. * RCC_APB2Periph_GPIOB. * RCC_APB2Periph_GPIOC. * RCC_APB2Periph_GPIOD. * RCC_APB2Periph_GPIOE * RCC_APB2Periph_ADC1. * RCC_APB2Periph_ADC2 * RCC_APB2Periph_TIM1. * RCC_APB2Periph_SPI1. * RCC_APB2Periph_TIM8 * RCC_APB2Periph_TIM9 * RCC_APB2Periph_TIM10 * RCC_APB2Periph_USART1. * NewState: ENABLE or DISABLE * Return : None *******************************************************************************/ void RCC_APB2PeriphClockCmd(uint32_t RCC_APB2Periph, FunctionalState NewState) { if (NewState != DISABLE) { RCC->APB2PCENR |= RCC_APB2Periph; } else { RCC->APB2PCENR &= ~RCC_APB2Periph; } } /******************************************************************************* * Function Name : RCC_APB1PeriphClockCmd * Description : Enables or disables the Low Speed APB (APB1) peripheral clock. * Input : RCC_APB1Periph: specifies the APB1 peripheral to gates its clock. * RCC_APB1Periph_TIM2. * RCC_APB1Periph_TIM3. * RCC_APB1Periph_TIM4. * RCC_APB1Periph_TIM5 * RCC_APB1Periph_TIM6 * RCC_APB1Periph_TIM7 * RCC_APB1Periph_UART6 * RCC_APB1Periph_UART7 * RCC_APB1Periph_UART8 * RCC_APB1Periph_WWDG. * RCC_APB1Periph_SPI2. * RCC_APB1Periph_USART2. * RCC_APB1Periph_USART3. * RCC_APB1Periph_UART4 * RCC_APB1Periph_UART5 * RCC_APB1Periph_I2C1. * RCC_APB1Periph_I2C2. * RCC_APB1Periph_USB. * RCC_APB1Periph_CAN1. * RCC_APB1Periph_BKP. * RCC_APB1Periph_PWR. * RCC_APB1Periph_DAC. * NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_APB1PeriphClockCmd(uint32_t RCC_APB1Periph, FunctionalState NewState) { if (NewState != DISABLE) { RCC->APB1PCENR |= RCC_APB1Periph; } else { RCC->APB1PCENR &= ~RCC_APB1Periph; } } /******************************************************************************* * Function Name : RCC_APB2PeriphResetCmd * Description : Forces or releases High Speed APB (APB2) peripheral reset. * Input : RCC_APB2Periph: specifies the APB2 peripheral to reset. * RCC_APB2Periph_AFIO. * RCC_APB2Periph_GPIOA. * RCC_APB2Periph_GPIOB. * RCC_APB2Periph_GPIOC. * RCC_APB2Periph_GPIOD. * RCC_APB2Periph_GPIOE * RCC_APB2Periph_ADC1. * RCC_APB2Periph_ADC2 * RCC_APB2Periph_TIM1. * RCC_APB2Periph_SPI1. * RCC_APB2Periph_TIM8 * RCC_APB2Periph_TIM9 * RCC_APB2Periph_TIM10 * RCC_APB2Periph_USART1. * NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_APB2PeriphResetCmd(uint32_t RCC_APB2Periph, FunctionalState NewState) { if (NewState != DISABLE) { RCC->APB2PRSTR |= RCC_APB2Periph; } else { RCC->APB2PRSTR &= ~RCC_APB2Periph; } } /******************************************************************************* * Function Name : RCC_APB1PeriphResetCmd * Description : Forces or releases Low Speed APB (APB1) peripheral reset. * Input : RCC_APB1Periph: specifies the APB1 peripheral to reset. * RCC_APB1Periph_TIM2. * RCC_APB1Periph_TIM3. * RCC_APB1Periph_TIM4. * RCC_APB1Periph_TIM5 * RCC_APB1Periph_TIM6 * RCC_APB1Periph_TIM7 * RCC_APB1Periph_UART6 * RCC_APB1Periph_UART7 * RCC_APB1Periph_UART8 * RCC_APB1Periph_WWDG. * RCC_APB1Periph_SPI2. * RCC_APB1Periph_USART2. * RCC_APB1Periph_USART3. * RCC_APB1Periph_UART4 * RCC_APB1Periph_UART5 * RCC_APB1Periph_I2C1. * RCC_APB1Periph_I2C2. * RCC_APB1Periph_USB. * RCC_APB1Periph_CAN1. * RCC_APB1Periph_BKP. * RCC_APB1Periph_PWR. * RCC_APB1Periph_DAC. * NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_APB1PeriphResetCmd(uint32_t RCC_APB1Periph, FunctionalState NewState) { if (NewState != DISABLE) { RCC->APB1PRSTR |= RCC_APB1Periph; } else { RCC->APB1PRSTR &= ~RCC_APB1Periph; } } /******************************************************************************* * Function Name : RCC_BackupResetCmd * Description : Forces or releases the Backup domain reset. * Input : NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_BackupResetCmd(FunctionalState NewState) { if(NewState) { RCC->BDCTLR |= ((uint32_t)1<<16); } else{ RCC->BDCTLR &= ~((uint32_t)1<<16); } } /******************************************************************************* * Function Name : RCC_ClockSecuritySystemCmd * Description : Enables or disables the Clock Security System. * Input : NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_ClockSecuritySystemCmd(FunctionalState NewState) { if(NewState) { RCC->CTLR |= ((uint32_t)1<<19); } else{ RCC->CTLR &= ~((uint32_t)1<<19); } } /******************************************************************************* * Function Name : RCC_MCOConfig * Description : Selects the clock source to output on MCO pin. * Input : RCC_MCO: specifies the clock source to output. * RCC_MCO_NoClock: No clock selected. * RCC_MCO_SYSCLK: System clock selected. * RCC_MCO_HSI: HSI oscillator clock selected. * RCC_MCO_HSE: HSE oscillator clock selected. * RCC_MCO_PLLCLK_Div2: PLL clock divided by 2 selected. * RCC_MCO_PLL2CLK: PLL2 clock selected * RCC_MCO_PLL3CLK_Div2: PLL3 clock divided by 2 selected * RCC_MCO_XT1: External 3-25 MHz oscillator clock selected * RCC_MCO_PLL3CLK: PLL3 clock selected * Return : None *******************************************************************************/ void RCC_MCOConfig(uint8_t RCC_MCO) { *(__IO uint8_t *) CFGR0_BYTE4_ADDRESS = RCC_MCO; } /******************************************************************************* * Function Name : RCC_GetFlagStatus * Description : Checks whether the specified RCC flag is set or not. * Input : RCC_FLAG: specifies the flag to check. * RCC_FLAG_HSIRDY: HSI oscillator clock ready. * RCC_FLAG_HSERDY: HSE oscillator clock ready. * RCC_FLAG_PLLRDY: PLL clock ready. * RCC_FLAG_PLL2RDY: PLL2 clock ready. * RCC_FLAG_PLL3RDY: PLL3 clock ready. * RCC_FLAG_LSERDY: LSE oscillator clock ready. * RCC_FLAG_LSIRDY: LSI oscillator clock ready. * RCC_FLAG_PINRST: Pin reset. * RCC_FLAG_PORRST: POR/PDR reset. * RCC_FLAG_SFTRST: Software reset. * RCC_FLAG_IWDGRST: Independent Watchdog reset. * RCC_FLAG_WWDGRST: Window Watchdog reset. * RCC_FLAG_LPWRRST: Low Power reset. * Return : FlagStatus: SET or RESET. *******************************************************************************/ FlagStatus RCC_GetFlagStatus(uint8_t RCC_FLAG) { uint32_t tmp = 0; uint32_t statusreg = 0; FlagStatus bitstatus = RESET; tmp = RCC_FLAG >> 5; if (tmp == 1) { statusreg = RCC->CTLR; } else if (tmp == 2) { statusreg = RCC->BDCTLR; } else { statusreg = RCC->RSTSCKR; } tmp = RCC_FLAG & FLAG_Mask; if ((statusreg & ((uint32_t)1 << tmp)) != (uint32_t)RESET) { bitstatus = SET; } else { bitstatus = RESET; } return bitstatus; } /******************************************************************************* * Function Name : RCC_ClearFlag * Description : Clears the RCC reset flags. * Input : None * Return : None *******************************************************************************/ void RCC_ClearFlag(void) { RCC->RSTSCKR |= RSTSCKR_RMVF_Set; } /******************************************************************************* * Function Name : RCC_GetITStatus * Description : Checks whether the specified RCC interrupt has occurred or not. * Input : RCC_IT: specifies the RCC interrupt source to check. * RCC_IT_LSIRDY: LSI ready interrupt. * RCC_IT_LSERDY: LSE ready interrupt. * RCC_IT_HSIRDY: HSI ready interrupt. * RCC_IT_HSERDY: HSE ready interrupt. * RCC_IT_PLLRDY: PLL ready interrupt. * RCC_IT_PLL2RDY: PLL2 ready interrupt. * RCC_IT_PLL3RDY: PLL3 ready interrupt. * RCC_IT_CSS: Clock Security System interrupt. * Return : ITStatus: SET or RESET. *******************************************************************************/ ITStatus RCC_GetITStatus(uint8_t RCC_IT) { ITStatus bitstatus = RESET; if ((RCC->INTR & RCC_IT) != (uint32_t)RESET) { bitstatus = SET; } else { bitstatus = RESET; } return bitstatus; } /******************************************************************************* * Function Name : RCC_ClearITPendingBit * Description : Clears the RCC's interrupt pending bits. * Input : RCC_IT: specifies the interrupt pending bit to clear. * RCC_IT_LSIRDY: LSI ready interrupt. * RCC_IT_LSERDY: LSE ready interrupt. * RCC_IT_HSIRDY: HSI ready interrupt. * RCC_IT_HSERDY: HSE ready interrupt. * RCC_IT_PLLRDY: PLL ready interrupt. * RCC_IT_PLL2RDY: PLL2 ready interrupt. * RCC_IT_PLL3RDY: PLL3 ready interrupt. * RCC_IT_CSS: Clock Security System interrupt. * Return : None *******************************************************************************/ void RCC_ClearITPendingBit(uint8_t RCC_IT) { *(__IO uint8_t *) INTR_BYTE3_ADDRESS = RCC_IT; } /******************************************************************************* * Function Name : RCC_PREDIV1Config * Description : Configures the PREDIV1 division factor. * Input : RCC_PREDIV1_Source: specifies the PREDIV1 clock source. * RCC_PREDIV1_Source_HSE: HSE selected as PREDIV1 clock * RCC_PREDIV1_Source_PLL2: PLL2 selected as PREDIV1 clock * RCC_PREDIV1_Div: specifies the PREDIV1 clock division factor. * This parameter can be RCC_PREDIV1_Divx where x:[1,16] * Return : None *******************************************************************************/ void RCC_PREDIV1Config(uint32_t RCC_PREDIV1_Source, uint32_t RCC_PREDIV1_Div) { uint32_t tmpreg = 0; tmpreg = RCC->CFGR2; tmpreg &= ~(CFGR2_PREDIV1 | CFGR2_PREDIV1SRC); tmpreg |= RCC_PREDIV1_Source | RCC_PREDIV1_Div ; RCC->CFGR2 = tmpreg; } /******************************************************************************* * Function Name : RCC_PREDIV2Config * Description : Configures the PREDIV2 division factor. * Input : RCC_PREDIV2_Div: specifies the PREDIV2 clock division factor. * This parameter can be RCC_PREDIV2_Divx where x:[1,16] * Return : None *******************************************************************************/ void RCC_PREDIV2Config(uint32_t RCC_PREDIV2_Div) { uint32_t tmpreg = 0; tmpreg = RCC->CFGR2; tmpreg &= ~CFGR2_PREDIV2; tmpreg |= RCC_PREDIV2_Div; RCC->CFGR2 = tmpreg; } /******************************************************************************* * Function Name : RCC_PLL2Config * Description : Configures the PLL2 multiplication factor. * Input : RCC_PLL2Mul: specifies the PLL2 multiplication factor. * This parameter can be RCC_PLL2Mul_x where x:{[8,14], 16, 20} * Return : None *******************************************************************************/ void RCC_PLL2Config(uint32_t RCC_PLL2Mul) { uint32_t tmpreg = 0; tmpreg = RCC->CFGR2; tmpreg &= ~CFGR2_PLL2MUL; tmpreg |= RCC_PLL2Mul; RCC->CFGR2 = tmpreg; } /******************************************************************************* * Function Name : RCC_PLL2Cmd * Description : Enables or disables the PLL2. * Input : NewState: new state of the PLL2. This parameter can be: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_PLL2Cmd(FunctionalState NewState) { if(NewState) { RCC->CTLR |= ((uint32_t)1<<26); } else{ RCC->CTLR &= ~((uint32_t)1<<26); } } /******************************************************************************* * Function Name : RCC_PLL3Config * Description : Configures the PLL3 multiplication factor. * Input : RCC_PLL3Mul: specifies the PLL3 multiplication factor. * This parameter can be RCC_PLL3Mul_x where x:{[8,14], 16, 20} * Return : None *******************************************************************************/ void RCC_PLL3Config(uint32_t RCC_PLL3Mul) { uint32_t tmpreg = 0; tmpreg = RCC->CFGR2; tmpreg &= ~CFGR2_PLL3MUL; tmpreg |= RCC_PLL3Mul; RCC->CFGR2 = tmpreg; } /******************************************************************************* * Function Name : RCC_PLL3Cmd * Description : Enables or disables the PLL3. * Input : NewState: new state of the PLL3. This parameter can be: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_PLL3Cmd(FunctionalState NewState) { if(NewState) { RCC->CTLR |= ((uint32_t)1<<28); } else{ RCC->CTLR &= ~((uint32_t)1<<28); } } /******************************************************************************* * Function Name : RCC_OTGFSCLKConfig * Description : Configures the USB OTG FS clock (OTGFSCLK). * Input : RCC_OTGFSCLKSource: specifies the USB OTG FS clock source. * RCC_OTGFSCLKSource_PLLCLK_Div1: PLL clock divided by 1 selected as USB OTG FS clock source * RCC_OTGFSCLKSource_PLLCLK_Div2: PLL clock divided by 2 selected as USB OTG FS clock source * RCC_OTGFSCLKSource_PLLCLK_Div3: PLL clock divided by 3 selected as USB OTG FS clock source * Return : None *******************************************************************************/ void RCC_OTGFSCLKConfig(uint32_t RCC_OTGFSCLKSource) { RCC->CFGR0 &= ~((uint32_t)3<<22); RCC->CFGR0 |= RCC_OTGFSCLKSource<<22; } /******************************************************************************* * Function Name : RCC_I2S2CLKConfig * Description : Configures the I2S2 clock source(I2S2CLK). * Input : RCC_I2S2CLKSource: specifies the I2S2 clock source. * RCC_I2S2CLKSource_SYSCLK: system clock selected as I2S2 clock entry * RCC_I2S2CLKSource_PLL3_VCO: PLL3 VCO clock selected as I2S2 clock entry * Return : None *******************************************************************************/ void RCC_I2S2CLKConfig(uint32_t RCC_I2S2CLKSource) { RCC->CFGR2 &= ~((uint32_t)1<<17); RCC->CFGR2 |= RCC_I2S2CLKSource<<17; } /******************************************************************************* * Function Name : RCC_I2S3CLKConfig * Description : Configures the I2S3 clock source(I2S2CLK). * Input : RCC_I2S3CLKSource: specifies the I2S3 clock source. * RCC_I2S3CLKSource_SYSCLK: system clock selected as I2S3 clock entry * RCC_I2S3CLKSource_PLL3_VCO: PLL3 VCO clock selected as I2S3 clock entry * Return : None *******************************************************************************/ void RCC_I2S3CLKConfig(uint32_t RCC_I2S3CLKSource) { RCC->CFGR2 &= ~((uint32_t)1<<18); RCC->CFGR2 |= RCC_I2S3CLKSource<<18; } /******************************************************************************* * Function Name : RCC_AHBPeriphResetCmd * Description : Forces or releases AHB peripheral reset. * Input : RCC_AHBPeriph: specifies the AHB peripheral to reset. * RCC_AHBPeriph_OTG_FS * RCC_AHBPeriph_ETH_MAC * NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_AHBPeriphResetCmd(uint32_t RCC_AHBPeriph, FunctionalState NewState) { if (NewState != DISABLE) { RCC->AHBRSTR |= RCC_AHBPeriph; } else { RCC->AHBRSTR &= ~RCC_AHBPeriph; } } /******************************************************************************* * Function Name : RCC_ADCCLKADJcmd * Description : Enable ADC clock duty cycle adjustment. * Input : NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_ADCCLKADJcmd(FunctionalState NewState) { if (NewState != DISABLE) { RCC->CFGR0 |= ((uint32_t)1<<31); } else { RCC->CFGR0 &= ~((uint32_t)1<<31); } } /******************************************************************************* * Function Name : RCC_RNGCLKConfig * Description : Configures the RNG clock source. * Input : RCC_RNGCLKSource: specifies the RNG clock source. * RCC_RNGCLKSource_SYSCLK: system clock selected as RNG clock entry * RCC_RNGCLKSource_PLL3_VCO: PLL3 VCO clock selected as RNG clock entry * Return : None *******************************************************************************/ void RCC_RNGCLKConfig(uint32_t RCC_RNGCLKSource) { RCC->CFGR2 &= ~((uint32_t)1<<19); RCC->CFGR2 |= RCC_RNGCLKSource<<19; } /******************************************************************************* * Function Name : RCC_ETH1GCLKConfig * Description : Configures the ETH1G clock source. * Input : RCC_RNGCLKSource: specifies the ETH1G clock source. * RCC_ETH1GCLKSource_PLL2_VCO: system clock selected as ETH1G clock entry * RCC_ETH1GCLKSource_PLL3_VCO: PLL3 VCO clock selected as ETH1G clock entry * RCC_ETH1GCLKSource_PB1_IN£º GPIO PB1 input clock selected as ETH1G clock entry * Return : None *******************************************************************************/ void RCC_ETH1GCLKConfig(uint32_t RCC_ETH1GCLKSource) { RCC->CFGR2 &= ~((uint32_t)3<<20); RCC->CFGR2 |= RCC_ETH1GCLKSource<<20; } /******************************************************************************* * Function Name : RCC_ETH1G_125Mcmd * Description : Enable ETH1G 125M. * Input : NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_ETH1G_125Mcmd(FunctionalState NewState) { if (NewState != DISABLE) { RCC->CFGR2 |= ((uint32_t)1<<22); } else { RCC->CFGR2 &= ~((uint32_t)1<<22); } } /******************************************************************************* * Function Name : RCC_USBHSConfig * Description : Configures the USBHS clock. * Input : RCC_USBHS: defines the USBHS clock divider. * RCC_USBPLL_Div1: USBHS clock = USBPLL. * RCC_USBPLL_Div2: USBHS clock = USBPLL/2. * RCC_USBPLL_Div3: USBHS clock = USBPLL/3. * RCC_USBPLL_Div4: USBHS clock = USBPLL/4. * RCC_USBPLL_Div5: USBHS clock = USBPLL/5. * RCC_USBPLL_Div6: USBHS clock = USBPLL/6. * RCC_USBPLL_Div7: USBHS clock = USBPLL/7. * RCC_USBPLL_Div8: USBHS clock = USBPLL/8. * Return : None *******************************************************************************/ void RCC_USBHSConfig(uint32_t RCC_USBHS) { RCC->CFGR2 &= ~((uint32_t)7<<24); RCC->CFGR2 |= RCC_USBHS<<24; } /******************************************************************************* * Function Name : RCC_USBHSPLLCLKConfig * Description : Configures the USBHSPLL clock source. * Input : RCC_RNGCLKSource: specifies the USBHSPLL clock source. * RCC_HSBHSPLLCLKSource_HSE: HSE clock selected as USBHSPLL clock entry * RCC_HSBHSPLLCLKSource_HSI: HSI clock selected as USBHSPLL clock entry * Return : None *******************************************************************************/ void RCC_USBHSPLLCLKConfig(uint32_t RCC_USBHSPLLCLKSource) { RCC->CFGR2 &= ~((uint32_t)1<<27); RCC->CFGR2 |= RCC_USBHSPLLCLKSource<<27; } /******************************************************************************* * Function Name : RCC_USBHSPLLCKREFCLKConfig * Description : Configures the USBHSPLL reference clock. * Input : RCC_USBHSPLLCKREFCLKSource: Select reference clock. * RCC_USBHSPLLCKREFCLK_3M: reference clock 3Mhz. * RCC_USBHSPLLCKREFCLK_4M: reference clock 4Mhz. * RCC_USBHSPLLCKREFCLK_8M: reference clock 8Mhz. * RCC_USBHSPLLCKREFCLK_5M: reference clock 5Mhz. * Return : None *******************************************************************************/ void RCC_USBHSPLLCKREFCLKConfig(uint32_t RCC_USBHSPLLCKREFCLKSource) { RCC->CFGR2 &= ~((uint32_t)3<<28); RCC->CFGR2 |= RCC_USBHSPLLCKREFCLKSource<<28; } /******************************************************************************* * Function Name : RCC_USBHSPHYPLLALIVEcmd * Description : Enable USBHS PHY control. * Input : NewState: ENABLE or DISABLE. * Return : None *******************************************************************************/ void RCC_USBHSPHYPLLALIVEcmd(FunctionalState NewState) { if (NewState != DISABLE) { RCC->CFGR2 |= ((uint32_t)1<<30); } else { RCC->CFGR2 &= ~((uint32_t)1<<30); } } /******************************************************************************* * Function Name : RCC_USBCLK48MConfig * Description : Configures the USB clock 48MHz source. * Input : RCC_USBCLK48MSource: specifies the USB clock 48MHz source. * RCC_USBCLK48MCLKSource_PLLCLK: PLLCLK clock selected as USB clock 48MHz clock entry * RCC_USBCLK48MCLKSource_USBPHY: USBPHY clock selected as USB clock 48MHz clock entry * Return : None *******************************************************************************/ void RCC_USBCLK48MConfig(uint32_t RCC_USBCLK48MSource) { RCC->CFGR2 &= ~((uint32_t)1<<31); RCC->CFGR2 |= RCC_USBCLK48MSource<<31; }