#include "./rcc/bsp_clkconfig.h" #include "stm32h7xx_hal_rcc.h" /** * @brief 系统时钟从ISR上下文切换 * @retval 无 */ void SwitchSystemClock(void) { if (__HAL_RCC_GET_PLL_OSCSOURCE() == RCC_PLLSOURCE_HSI) { /* PLL源是HSI振荡器 */ /* 将SYSCLK频率设置为480000000Hz，来自由CSI时钟源产生的PLL */ SystemClockCSI_Config(); } else if (__HAL_RCC_GET_PLL_OSCSOURCE() == RCC_PLLSOURCE_HSE) { /* PLL源是HSE振荡器 */ /* 将SYSCLK频率设置为480000000Hz，来自由HSI时钟源产生的PLL */ SystemClockHSI_Config(); } else if (__HAL_RCC_GET_PLL_OSCSOURCE() == RCC_PLLSOURCE_CSI) { /* PLL源是CSI振荡器 */ /* 将SYSCLK频率设置为480000000Hz，来自由HSE时钟源产生的PLL */ SystemClockHSE_Config(); } } /** * @brief System Clock 配置 * system Clock 配置如下: * System Clock source = PLL (HSE) * SYSCLK(Hz) = 480000000 (CPU Clock) * HCLK(Hz) = 240000000 (AXI and AHBs Clock) * AHB Prescaler = 2 * D1 APB3 Prescaler = 2 (APB3 Clock 120MHz) * D2 APB1 Prescaler = 2 (APB1 Clock 120MHz) * D2 APB2 Prescaler = 2 (APB2 Clock 120MHz) * D3 APB4 Prescaler = 2 (APB4 Clock 120MHz) * HSE Frequency(Hz) = 25000000 * PLL_M = 5 * PLL_N = 192 * PLL_P = 2 * PLL_Q = 4 * PLL_R = 2 * VDD(V) = 3.3 * Flash Latency(WS) = 4 * @param 无 * @retval 无 */ void SystemClock_Config(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct; RCC_OscInitTypeDef RCC_OscInitStruct; HAL_StatusTypeDef ret = HAL_OK; /*使能供电配置更新 */ MODIFY_REG(PWR->CR3, PWR_CR3_SCUEN, 0); /* 当器件的时钟频率低于最大系统频率时，电压调节可以优化功耗， 关于系统频率的电压调节值的更新可以参考产品数据手册。 */ __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1); while(!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {} /* 启用HSE振荡器并使用HSE作为源激活PLL */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.HSIState = RCC_HSI_OFF; RCC_OscInitStruct.CSIState = RCC_CSI_OFF; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 5; RCC_OscInitStruct.PLL.PLLN = 192; RCC_OscInitStruct.PLL.PLLP = 2; RCC_OscInitStruct.PLL.PLLR = 2; RCC_OscInitStruct.PLL.PLLQ = 4; RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE; RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_2; ret = HAL_RCC_OscConfig(&RCC_OscInitStruct); if(ret != HAL_OK) { while(1) { ; } } /* 选择PLL作为系统时钟源并配置总线时钟分频器 */ RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | \ RCC_CLOCKTYPE_HCLK | \ RCC_CLOCKTYPE_D1PCLK1 | \ RCC_CLOCKTYPE_PCLK1 | \ RCC_CLOCKTYPE_PCLK2 | \ RCC_CLOCKTYPE_D3PCLK1); RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2; RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2; RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2; RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2; RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2; ret = HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4); if(ret != HAL_OK) { while(1) { ; } } } /** * @brief 将PLL源从CSI切换到HSE，并选择PLL作为SYSCLK源 * system Clock 配置如下: * System Clock source = PLL (HSE) * SYSCLK(Hz) = 480000000 (CPU Clock) * HCLK(Hz) = 240000000 (AXI and AHBs Clock) * AHB Prescaler = 2 * D1 APB3 Prescaler = 2 (APB3 Clock 120MHz) * D2 APB1 Prescaler = 2 (APB1 Clock 120MHz) * D2 APB2 Prescaler = 2 (APB2 Clock 120MHz) * D3 APB4 Prescaler = 2 (APB4 Clock 120MHz) * HSE Frequency(Hz) = 25000000 * PLL_M = 5 * PLL_N = 192 * PLL_P = 2 * PLL_Q = 4 * PLL_R = 2 * VDD(V) = 3.3 * Flash Latency(WS) = 4 * @param 无 * @retval 无 */ void SystemClockHSE_Config(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; RCC_OscInitTypeDef RCC_OscInitStruct = {0}; /* -1- 选择CSI作为系统时钟源以允许修改PLL配置 */ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_CSI; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) { while(1) { ; } } /* -2- 启用HSE振荡器，选择它作为PLL源，最后激活PLL */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; RCC_OscInitStruct.PLL.PLLM = 5; RCC_OscInitStruct.PLL.PLLN = 192; RCC_OscInitStruct.PLL.PLLP = 2; RCC_OscInitStruct.PLL.PLLR = 2; RCC_OscInitStruct.PLL.PLLQ = 4; RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE; RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_2; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { while(1) { ; } } /* -2-选择PLL作为系统时钟源并配置总线时钟分频器 */ RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | \ RCC_CLOCKTYPE_HCLK | \ RCC_CLOCKTYPE_D1PCLK1 | \ RCC_CLOCKTYPE_PCLK1 | \ RCC_CLOCKTYPE_PCLK2 | \ RCC_CLOCKTYPE_D3PCLK1); RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2; RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2; RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2; RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2; RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2; if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) { while(1) { ; } } /* -4- 可选：禁用CSI振荡器（如果应用程序不再需要HSI）*/ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_CSI; RCC_OscInitStruct.CSIState = RCC_CSI_OFF; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { while(1) { ; } } } /** * @brief 将PLL源从HSE切换到HSI，并选择PLL作为SYSCLK源 * system Clock 配置如下: * System Clock source = PLL (HSI) * SYSCLK(Hz) = 480000000 (CPU Clock) * HCLK(Hz) = 240000000 (AXI and AHBs Clock) * AHB Prescaler = 2 * D1 APB3 Prescaler = 2 (APB3 Clock 120MHz) * D2 APB1 Prescaler = 2 (APB1 Clock 120MHz) * D2 APB2 Prescaler = 2 (APB2 Clock 120MHz) * D3 APB4 Prescaler = 2 (APB4 Clock 120MHz) * HSI Frequency(Hz) = 64000000 * PLL_M = 16 * PLL_N = 240 * PLL_P = 2 * PLL_Q = 4 * PLL_R = 2 * VDD(V) = 3.3 * Flash Latency(WS) = 4 * @param 无 * @retval 无 */ void SystemClockHSI_Config(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; RCC_OscInitTypeDef RCC_OscInitStruct = {0}; /* -1- 选择HSE作为系统时钟源以允许修改PLL配置 */ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSE; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) { while(1) { ; } } /* -2- 启用HSI振荡器，选择它作为PLL源，最后激活PLL */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI; RCC_OscInitStruct.HSIState = RCC_HSI_ON; RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI; RCC_OscInitStruct.PLL.PLLM = 16; RCC_OscInitStruct.PLL.PLLN = 240; RCC_OscInitStruct.PLL.PLLP = 2; RCC_OscInitStruct.PLL.PLLR = 2; RCC_OscInitStruct.PLL.PLLQ = 4; RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE; RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_2; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { while(1) { ; } } /* -3-选择PLL作为系统时钟源并配置总线时钟分频器 */ RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | \ RCC_CLOCKTYPE_HCLK | \ RCC_CLOCKTYPE_D1PCLK1 | \ RCC_CLOCKTYPE_PCLK1 | \ RCC_CLOCKTYPE_PCLK2 | \ RCC_CLOCKTYPE_D3PCLK1); RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2; RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2; RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2; RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2; RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2; if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) { while(1) { ; } } /* -4- 可选：禁用HSE振荡器（如果应用程序不再需要HSE） */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_OFF; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { while(1) { ; } } } /** * @brief 将PLL源从HSI切换到CSI，并选择PLL作为SYSCLK源 * system Clock 配置如下: * System Clock source = PLL (CSI) * SYSCLK(Hz) = 480000000 (CPU Clock) * HCLK(Hz) = 240000000 (AXI and AHBs Clock) * AHB Prescaler = 2 * D1 APB3 Prescaler = 2 (APB3 Clock 120MHz) * D2 APB1 Prescaler = 2 (APB1 Clock 120MHz) * D2 APB2 Prescaler = 2 (APB2 Clock 120MHz) * D3 APB4 Prescaler = 2 (APB4 Clock 120MHz) * CSI Frequency(Hz) = 4000000 * PLL_M = 1 * PLL_N = 240 * PLL_P = 2 * PLL_Q = 4 * PLL_R = 2 * VDD(V) = 3.3 * Flash Latency(WS) = 4 * @param 无 * @retval 无 */ void SystemClockCSI_Config(void) { RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; RCC_OscInitTypeDef RCC_OscInitStruct = {0}; /* -1- 选择HSI作为系统时钟源以允许修改PLL配置 */ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI; if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) { while(1) { ; } } /* -2- 启用CSI振荡器，选择它作为PLL源，最后激活PLL */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_CSI; RCC_OscInitStruct.CSIState = RCC_CSI_ON; RCC_OscInitStruct.CSICalibrationValue = RCC_CSICALIBRATION_DEFAULT; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON; RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_CSI; RCC_OscInitStruct.PLL.PLLM = 1; RCC_OscInitStruct.PLL.PLLN = 240; RCC_OscInitStruct.PLL.PLLP = 2; RCC_OscInitStruct.PLL.PLLR = 2; RCC_OscInitStruct.PLL.PLLQ = 4; RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE; RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_2; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { while(1) { ; } } /* -3-选择PLL作为系统时钟源并配置总线时钟分频器 */ RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | \ RCC_CLOCKTYPE_HCLK | \ RCC_CLOCKTYPE_D1PCLK1 | \ RCC_CLOCKTYPE_PCLK1 | \ RCC_CLOCKTYPE_PCLK2 | \ RCC_CLOCKTYPE_D3PCLK1); RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2; RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2; RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2; RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2; RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2; if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) { while(1) { ; } } /* -4- 可选：禁用HSI振荡器（如果应用程序不再需要HSI） */ RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI; RCC_OscInitStruct.HSEState = RCC_HSI_OFF; RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { while(1) { ; } } }