我有两块 STM32F446RE PCB,遇到了以下问题。 测试板仅运行简单的 LED 闪烁程序: 板 1: 程序有时会进入 HardFault,情况如下: HCLK 时钟 = 82 MHz
HSI RC = 16 MHz
程序在 HardFault_Handler 处停止,情况如下: HCLK 时钟 >= 83 MHz
HSI RC = 16 MHz
使用 HSE = 16 MHz 时也会出现同样的情况。 板 2: 程序有时会进入 HardFault,情况如下: HCLK 时钟 = 75 MHz
HSI RC = 16 MHz
程序在 HardFault_Handler 处停止,情况如下: HCLK 时钟 >= 76 MHz
HSI RC = 16 MHz
此处使用 HSE 时,在调用 SystemClock_Config() 时会返回 HAL_TIMEOUT 错误,在 HAL_RCC_OscConfig 中调试时得到以下数值: tickstart = 101
HAL_GetTick() -> uwTick 在 101 处停止
外部晶振连接了 22pF 的电容。 附上了main.c 文件。 void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct = {0}; RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage */ __HAL_RCC_PWR_CLK_ENABLE(); __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);
/** Initializes the RCC Oscillators according to the specified parameters * in the RCC_OscInitTypeDef structure. */ 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 = 8; RCC_OscInitStruct.PLL.PLLN = 82; RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2; RCC_OscInitStruct.PLL.PLLQ = 2; RCC_OscInitStruct.PLL.PLLR = 2; if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) { Error_Handler(); }
/** Initializes the CPU, AHB and APB buses clocks */ RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2; RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) { Error_Handler(); } }
int main(void) { /* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */ HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */ SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */ MX_GPIO_Init(); MX_USART2_UART_Init(); /* USER CODE BEGIN 2 */
/* USER CODE END 2 */
/* Infinite loop */ /* USER CODE BEGIN WHILE */ while (1) { HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_10); HAL_Delay(500); HAL_GPIO_TogglePin(GPIOA, GPIO_PIN_9); HAL_Delay(500); /* USER CODE END WHILE */
/* USER CODE BEGIN 3 */ } /* USER CODE END 3 */ }
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