[问答]

STM32F103C8T6最小系统板为什么程序执行到0.425秒就从头开始？

问答对人有帮助，内容完整，我也想知道答案 0 新手求助。 STM32F103C8T6最小系统板，使用stmubeide编写程序，系统时钟配置72M，配置了一个GPIO用来控制LED灯。用了三种方式进行延时（1.for 循环 2.hal 延时函数 3.定时器延时）控制led亮灭，无论哪种方式，从示波器上看，0.425秒以内程序还能正常运行，一到0.425秒，程序就从头开始开始执行了。就配置了时钟，GPIO和定时器1，其余没有配置。不知是哪里出了问题，请教各位大神！以下是main.c 内容： / USER CODE BEGIN Header //** @file : main.c @brief : Main program body @attention Copyright (c) 2023 STMicroelectronics. All rights reserved. This software is licensed under terms that can be found in the LICENSE file in the root directory of this software component. If no LICENSE file comes with this software, it is provided AS-IS. // USER CODE END Header // Includes ------------------------------------------------------------------/ include "main.h" / Private includes ----------------------------------------------------------// USER CODE BEGIN Includes / / USER CODE END Includes / / Private typedef -----------------------------------------------------------// USER CODE BEGIN PTD / / USER CODE END PTD / / Private define ------------------------------------------------------------// USER CODE BEGIN PD / / USER CODE END PD / / Private macro -------------------------------------------------------------// USER CODE BEGIN PM / / USER CODE END PM / / Private variables ---------------------------------------------------------/TIM_HandleTypeDef htim1; / USER CODE BEGIN PV / / USER CODE END PV / / Private function prototypes -----------------------------------------------/void SystemClock_Config(void);static void MX_GPIO_Init(void);static void MX_TIM1_Init(void);/ USER CODE BEGIN PFP / / USER CODE END PFP / / Private user code ---------------------------------------------------------// USER CODE BEGIN 0 / / USER CODE END 0 / /* @brief The application entry point. @retval int/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_TIM1_Init();/ USER CODE BEGIN 2 / void HAL_Delay_us(uint16_t us){uint16_t counter = 0;HAL_TIM_SetAutoreload( htim1, us); //设置定时器自动加载值HAL_TIM_SetCounter( htim1, counter); //设置定时器初始值HAL_TIM_Base_Start( htim1); //启动定时器 while(counter != us) //直到定时器计数从0计数到us结束循环,刚好是所需要的时间{counter = __HAL_TIM_GetCounter( htim1); // 获取定时器当前计数}HAL_TIM_Base_Stop( htim1); // 停止定时器} void HAL_Delay_ms(uint16_t ms){for (int i = 0; i < ms; i++)HAL_Delay_us(1000);} void delay(int ms){for(int i = 0; i < ms; i++)for(int j = 0; j < 1000; j++);} / USER CODE END 2 / / Infinite loop // USER CODE BEGIN WHILE /int a = 0;while (1){// HAL_Delay(100); // delay(1000);//// a %= 3;//// switch(a++)// {// case 0 : HAL_GPIO_TogglePin(LED1_GPIO_Port,LED1_Pin); break;// case 1 : HAL_GPIO_TogglePin(LED2_GPIO_Port,LED2_Pin); break;// case 2 : HAL_GPIO_TogglePin(LED3_GPIO_Port,LED3_Pin); break;// default: break;// }HAL_Delay_ms(300);// a += 1;// a++;// if (a == 3)// {// a = 0;// }HAL_GPIO_TogglePin(LED1_GPIO_Port,LED1_Pin);HAL_GPIO_TogglePin(LED2_GPIO_Port,LED2_Pin);HAL_GPIO_TogglePin(LED3_GPIO_Port,LED3_Pin);// HAL_Delay(300);// HAL_GPIO_WritePin(LED1_GPIO_Port,LED1_Pin , GPIO_PIN_SET);// HAL_GPIO_WritePin(LED2_GPIO_Port,LED2_Pin , GPIO_PIN_SET);// HAL_GPIO_WritePin(LED3_GPIO_Port,LED3_Pin , GPIO_PIN_SET);// HAL_Delay(300);// HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, GPIO_PIN_RESET);// HAL_GPIO_WritePin(LED2_GPIO_Port,LED2_Pin , GPIO_PIN_SET);// HAL_GPIO_WritePin(LED3_GPIO_Port,LED3_Pin , GPIO_PIN_SET); / USER CODE END WHILE / / USER CODE BEGIN 3 /}/ USER CODE END 3 /} /* @brief System Clock Configuration @retval None/void SystemClock_Config(void){RCC_OscInitTypeDef RCC_OscInitStruct = {0};RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; /* Initializes the RCC Oscillators according to the specified parameters in the RCC_OscInitTypeDef structure./RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;RCC_OscInitStruct.HSEState = RCC_HSE_ON;RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;RCC_OscInitStruct.HSIState = RCC_HSI_ON;RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;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_DIV1; if (HAL_RCC_ClockConfig( RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK){Error_Handler();}} /** @brief TIM1 Initialization Function @param None @retval None/static void MX_TIM1_Init(void){ / USER CODE BEGIN TIM1_Init 0 / / USER CODE END TIM1_Init 0 / TIM_ClockConfigTypeDef sClockSourceConfig = {0};TIM_MasterConfigTypeDef sMasterConfig = {0}; / USER CODE BEGIN TIM1_Init 1 / / USER CODE END TIM1_Init 1 /htim1.Instance = TIM1;htim1.Init.Prescaler = 71;htim1.Init.CounterMode = TIM_COUNTERMODE_UP;htim1.Init.Period = 0;htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;htim1.Init.RepetitionCounter = 0;htim1.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;if (HAL_TIM_Base_Init( htim1) != HAL_OK){Error_Handler();}sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;if (HAL_TIM_ConfigClockSource( htim1, sClockSourceConfig) != HAL_OK){Error_Handler();}sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;if (HAL_TIMEx_MasterConfigSynchronization( htim1, sMasterConfig) != HAL_OK){Error_Handler();}/ USER CODE BEGIN TIM1_Init 2 / / USER CODE END TIM1_Init 2 / } /* @brief GPIO Initialization Function @param None @retval None/static void MX_GPIO_Init(void){GPIO_InitTypeDef GPIO_InitStruct = {0};/ USER CODE BEGIN MX_GPIO_Init_1 // USER CODE END MX_GPIO_Init_1 /* / GPIO Ports Clock Enable /HAL_RCC_GPIOD_CLK_ENABLE();HAL_RCC_GPIOA_CLK_ENABLE();__HAL_RCC_GPIOB_CLK_ENABLE(); /Configure GPIO pin Output Level /HAL_GPIO_WritePin(GPIOA, LED2_Pin\|LED3_Pin, GPIO_PIN_RESET); /Configure GPIO pin Output Level /HAL_GPIO_WritePin(LED1_GPIO_Port, LED1_Pin, GPIO_PIN_RESET); /Configure GPIO pins : LED2_Pin LED3_Pin /GPIO_InitStruct.Pin = LED2_Pin\|LED3_Pin;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;HAL_GPIO_Init(GPIOA, GPIO_InitStruct); /Configure GPIO pin : LED1_Pin /GPIO_InitStruct.Pin = LED1_Pin;GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;GPIO_InitStruct.Pull = GPIO_NOPULL;GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;HAL_GPIO_Init(LED1_GPIO_Port, GPIO_InitStruct); / USER CODE BEGIN MX_GPIO_Init_2 // USER CODE END MX_GPIO_Init_2 /} / USER CODE BEGIN 4 / / USER CODE END 4 / /** @brief This function is executed in case of error occurrence. @retval None/void Error_Handler(void){/ USER CODE BEGIN Error_Handler_Debug // User can add his own implementation to report the HAL error return state /__disable_irq();while (1){}/ USER CODE END Error_Handler_Debug /}* ifdef USE_FULL_ASSERT /** @brief Reports the name of the source file and the source line number where the assert_param error has occurred. @param file: pointer to the source file name @param line: assert_param error line source number @retval None/void assert_failed(uint8_t file, uint32_t line){/ USER CODE BEGIN 6 // User can add his own implementation to report the file name and line number,ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) // USER CODE END 6 /}endif / USE_FULL_ASSERT / 0
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答案对人有帮助，有参考价值 0 看不到main()主函数和主函数内的while();这样运行一次当然就跑飞了。

2023-8-7 17:23:04 评论举报刘鑫