[问答]

stm32g473vet6定时器2&5输出pwm有延迟是怎么回事？

问答对人有帮助，内容完整，我也想知道答案 0 对定时器2和5重新赋值后再启动定时器 pwm会在定时器启动后15秒左右才有输出，其余6个定时器的pwm输出正常工程使用CUBEMX创建 / USER CODE BEGIN Header //** @file : main.c @brief : Main program body @attention Copyright (c) 2024 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" include "tim.h" include "usart.h" include "gpio.h" include "stdio.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 ---------------------------------------------------------/ / USER CODE BEGIN PV // USER CODE END PV / / Private function prototypes -----------------------------------------------/void SystemClock_Config(void);/ USER CODE BEGIN PFP / if _user_debug void user_debug(void); endif / 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 /__disable_irq();/ USER CODE END SysInit / / Initialize all configured peripherals /MX_GPIO_Init();MX_TIM15_Init();MX_TIM16_Init();MX_TIM17_Init();MX_TIM1_Init();MX_TIM2_Init();MX_TIM3_Init();MX_TIM5_Init();MX_TIM20_Init();MX_USART1_UART_Init(); / USER CODE BEGIN 2 / // HAL_Delay(1000); if _user_debug user_debug(); endif TIM15->PSC = 1 - 1;TIM15->ARR = 42500 - 1;TIM15->CCR1 = 42500 / 2; TIM3->PSC = 1 - 1;TIM3->ARR = 42500 - 1;TIM3->CCR2 = 42500 / 2; TIM16->PSC = 1 - 1;TIM16->ARR = 42500 - 1;TIM16->CCR1 = 42500 / 2; TIM17->PSC = 1 - 1;TIM17->ARR = 42500 - 1;TIM17->CCR1 = 42500 / 2; TIM20->PSC = 1 - 1;TIM20->ARR = 42500 - 1;TIM20->CCR1 = 42500 / 2; TIM5->PSC = 1 - 1;TIM5->ARR = 42500 - 1;TIM5->CCR3 = 42500 / 2; TIM1->PSC = 1 - 1;TIM1->ARR = 42500 - 1;TIM1->CCR2 = 42500 / 2; TIM2->PSC = 1 - 1;TIM2->ARR = 42500 - 1;TIM2->CCR3 = 42500 / 2; HAL_TIM_PWM_Start( htim15, TIM_CHANNEL_1);HAL_TIM_PWM_Start( htim3, TIM_CHANNEL_2);HAL_TIM_PWM_Start( htim16, TIM_CHANNEL_1);HAL_TIM_PWM_Start( htim17, TIM_CHANNEL_1);HAL_TIM_PWM_Start( htim20, TIM_CHANNEL_1);HAL_TIM_PWM_Start( htim5, TIM_CHANNEL_3);HAL_TIM_PWM_Start( htim1, TIM_CHANNEL_2);HAL_TIM_PWM_Start( htim2, TIM_CHANNEL_3); HAL_GPIO_WritePin(Relay_1_GPIO_Port, Relay_1_Pin, GPIO_PIN_SET);user_debug();// HAL_Delay(1000); HAL_TIM_PWM_Stop( htim15, TIM_CHANNEL_1);HAL_TIM_PWM_Stop( htim3, TIM_CHANNEL_2);HAL_TIM_PWM_Stop( htim16, TIM_CHANNEL_1);HAL_TIM_PWM_Stop( htim17, TIM_CHANNEL_1);HAL_TIM_PWM_Stop( htim20, TIM_CHANNEL_1);HAL_TIM_PWM_Stop( htim5, TIM_CHANNEL_3);HAL_TIM_PWM_Stop( htim1, TIM_CHANNEL_2);HAL_TIM_PWM_Stop( htim2, TIM_CHANNEL_3); HAL_GPIO_WritePin(Relay_1_GPIO_Port, Relay_1_Pin, GPIO_PIN_RESET);// HAL_Delay(1000);user_debug();/ USER CODE END 2 / / Infinite loop // USER CODE BEGIN WHILE /HAL_GPIO_WritePin(Relay_1_GPIO_Port, Relay_1_Pin, GPIO_PIN_SET);TIM5->PSC = 1 - 1;TIM5->ARR = 11333 - 1;TIM5->CCR3 = 11333 / 2; TIM2->PSC = 1 - 1;TIM2->ARR = 11333 - 1;TIM2->CCR3 = 11333 / 2;/TIM2和TIM5重新赋值后启动8路PWM输出 TIM2和TIM5大约会延时15s后再输出其他6路正常/HAL_TIM_PWM_Start( htim15, TIM_CHANNEL_1);HAL_TIM_PWM_Start( htim3, TIM_CHANNEL_2);HAL_TIM_PWM_Start( htim16, TIM_CHANNEL_1);HAL_TIM_PWM_Start( htim17, TIM_CHANNEL_1);HAL_TIM_PWM_Start( htim20, TIM_CHANNEL_1);HAL_TIM_PWM_Start( htim5, TIM_CHANNEL_3);HAL_TIM_PWM_Start( htim1, TIM_CHANNEL_2);HAL_TIM_PWM_Start( htim2, TIM_CHANNEL_3);while (1){ if 0 //HAL_GPIO_WritePin(Relay_1_GPIO_Port, Relay_1_Pin, GPIO_PIN_RESET); endif / 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}; / Configure the main internal regulator output voltage/HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_BOOST); /** 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.PLL.PLLState = RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV6;RCC_OscInitStruct.PLL.PLLN = 85;RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;RCC_OscInitStruct.PLL.PLLQ = RCC_PLLQ_DIV2;RCC_OscInitStruct.PLL.PLLR = RCC_PLLR_DIV2;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_DIV1;RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; if (HAL_RCC_ClockConfig( RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK){Error_Handler();}} / USER CODE BEGIN 4 /void HAL_IncTick(void){ uwTick += uwTickFreq;}int fputc(int ch, FILE f){HAL_UART_Transmit( huart1, (uint8_t ) ch, 1, 1000); return (ch);} if _user_debug void user_debug(void){ uint32_t CPU_Sn0, CPU_Sn1, CPU_Sn2;CPU_Sn0 = (__IO uint32_t )(0x1FFF7590);CPU_Sn1 = (__IO uint32_t )(0x1FFF7590 + 4);CPU_Sn2 = (__IO uint32_t )(0x1FFF7590 + 8); printf("CPU : STM32G473VET6, LQFP100, Fre: %dMHzrn", SystemCoreClock / 1000000);printf("UID = %08X %08X %08Xnr", CPU_Sn2, CPU_Sn1, CPU_Sn0);} endif / 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 %drn", file, line) // USER CODE END 6 /}endif / USE_FULL_ASSERT / 0 本主题由 Harmony技术专家于 2024-7-4 15:21 审核通过
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答案对人有帮助，有参考价值 0 从您提供的信息来看，您在使用STM32G473VET6微控制器的定时器2和5输出PWM信号时遇到了延迟问题。这个问题可能是由以下几个原因导致的： 1. 初始化问题：确保您在初始化定时器2和5时，所有参数都设置正确。这包括时钟源、预分频器、自动重载寄存器、捕获/比较模式寄存器等。 2. 中断配置：如果您使用了中断来控制PWM输出，确保中断配置正确，并且中断优先级设置得当。 3. 软件延迟：检查您的代码中是否有可能导致延迟的部分，例如循环、等待或其他耗时操作。 4. 硬件问题：虽然不太可能，但硬件问题（如电源不稳定、I/O口问题等）也可能导致延迟。 5. PWM配置：检查PWM信号的频率和占空比设置是否正确。错误的设置可能导致输出信号不符合预期。 6. 时钟配置：确保您的系统时钟和定时器时钟配置正确。错误的时钟配置可能导致定时器工作不正常。 7. 软件滤波器：如果您的PWM输出连接到了外部设备，确保外部设备的软件滤波器设置正确，以避免不必要的延迟。 8. 软件版本：确保您使用的STM32CubeMX和HAL库是最新版本，以避免因软件bug导致的延迟。解决这个问题的步骤可能包括： - 检查初始化代码：确保定时器2和5的初始化代码与正常工作的其他定时器相同。 - 调试：使用调试工具逐步执行代码，查看是否有异常行为或延迟发生的地方。 - 简化代码：尝试简化PWM输出的相关代码，逐步添加功能，以确定问题所在。 - 更新软件：如果怀疑是软件问题，尝试更新STM32CubeMX和HAL库到最新版本。 - 硬件检查：检查硬件连接和电源供应，确保没有硬件问题。如果问题仍然存在，您可能需要提供更详细的代码和配置信息，以便进一步分析问题所在。

2024-7-4 16:44:24 评论举报洪茗苞