以下是我使用stm32cubemx生成的代码,使用示波器查看没有任何波形,pwm启动函数也加了,就是没有输出,找了好久还是没有解决,求解惑! void MX_TIM3_Init(void) { /* USER CODE BEGIN TIM3_Init 0 */ /* USER CODE END TIM3_Init 0 */ TIM_ClockConfigTypeDef sClockSourceConfig = {0}; TIM_MasterConfigTypeDef sMasterConfig = {0}; TIM_OC_InitTypeDef sConfigOC = {0}; /* USER CODE BEGIN TIM3_Init 1 */ /* USER CODE END TIM3_Init 1 */ htim3.Instance = TIM3; htim3.Init.Prescaler = 72-1; htim3.Init.CounterMode = TIM_COUNTERMODE_UP; htim3.Init.Period = 416; htim3.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1; htim3.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_ENABLE; if (HAL_TIM_Base_Init(&htim3) != HAL_OK) { Error_Handler(); } sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL; if (HAL_TIM_ConfigClockSource(&htim3, &sClockSourceConfig) != HAL_OK) { Error_Handler(); } if (HAL_TIM_PWM_Init(&htim3) != HAL_OK) { Error_Handler(); } sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET; sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE; if (HAL_TIMEx_MasterConfigSynchronization(&htim3, &sMasterConfig) != HAL_OK) { Error_Handler(); } sConfigOC.OCMode = TIM_OCMODE_PWM1; sConfigOC.Pulse = 200; sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH; sConfigOC.OCFastMode = TIM_OCFAST_DISABLE; if (HAL_TIM_PWM_ConfigChannel(&htim3, &sConfigOC, TIM_CHANNEL_4) != HAL_OK) { Error_Handler(); } /* USER CODE BEGIN TIM3_Init 2 */ HAL_TIM_PWM_Start(&htim3,TIM_CHANNEL_4);//此函数为开启pwm输出 /* USER CODE END TIM3_Init 2 */ HAL_TIM_MspPostInit(&htim3); } void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* tim_baseHandle) { if(tim_baseHandle->Instance==TIM2) { /* USER CODE BEGIN TIM2_MspInit 0 */ /* USER CODE END TIM2_MspInit 0 */ /* TIM2 clock enable */ __HAL_RCC_TIM2_CLK_ENABLE(); /* TIM2 interrupt Init */ HAL_NVIC_SetPriority(TIM2_IRQn, 0, 0); HAL_NVIC_EnableIRQ(TIM2_IRQn); /* USER CODE BEGIN TIM2_MspInit 1 */ /* USER CODE END TIM2_MspInit 1 */ } else if(tim_baseHandle->Instance==TIM3) { /* USER CODE BEGIN TIM3_MspInit 0 */ /* USER CODE END TIM3_MspInit 0 */ /* TIM3 clock enable */ __HAL_RCC_TIM3_CLK_ENABLE(); /* USER CODE BEGIN TIM3_MspInit 1 */ /* USER CODE END TIM3_MspInit 1 */ } } void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle) { GPIO_InitTypeDef GPIO_InitStruct = {0}; if(timHandle->Instance==TIM3) { /* USER CODE BEGIN TIM3_MspPostInit 0 */ /* USER CODE END TIM3_MspPostInit 0 */ __HAL_RCC_GPIOB_CLK_ENABLE(); /**TIM3 GPIO Configuration PB1 ------> TIM3_CH4 */ GPIO_InitStruct.Pin = GPIO_PIN_1; GPIO_InitStruct.Mode = GPIO_MODE_AF_PP; GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW; HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); /* USER CODE BEGIN TIM3_MspPostInit 1 */ /* USER CODE END TIM3_MspPostInit 1 */ } } void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* tim_baseHandle) { if(tim_baseHandle->Instance==TIM2) { /* USER CODE BEGIN TIM2_MspDeInit 0 */ /* USER CODE END TIM2_MspDeInit 0 */ /* Peripheral clock disable */ __HAL_RCC_TIM2_CLK_DISABLE(); /* TIM2 interrupt Deinit */ HAL_NVIC_DisableIRQ(TIM2_IRQn); /* USER CODE BEGIN TIM2_MspDeInit 1 */ /* USER CODE END TIM2_MspDeInit 1 */ } else if(tim_baseHandle->Instance==TIM3) { /* USER CODE BEGIN TIM3_MspDeInit 0 */ /* USER CODE END TIM3_MspDeInit 0 */ /* Peripheral clock disable */ __HAL_RCC_TIM3_CLK_DISABLE(); /* USER CODE BEGIN TIM3_MspDeInit 1 */ /* USER CODE END TIM3_MspDeInit 1 */ } } |
我想找STM32网口的设计方案
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ble hid
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_1);
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_2);
HAL_TIM_PWM_Start(&htim3, TIM_CHANNEL_3);
如果这没有输出就检查硬件,芯片焊接有无问题,管脚弄错没有,电源有无问题。
直接使用定时器模式驱动io翻转正常,说明硬件没有问题,我是直接配置的第四个通道
[md]奇怪的是我配上CH1通道pwm波形正常,但是CH4就不行
[md]pulse设置为0 是没有波形输出的。
这个问题找到了,是我调用别的外设将端口初始化了
类似的小疏忽 防不胜防~!😄 谢谢反馈~!