RT-Thread Studio 輸出PWM詳細教程

/** if you want to use pwm you can use the following instructions.
 *
 * STEP 1, open pwm driver framework support in the RT-Thread Settings file
 *
 * STEP 2, define macro related to the pwm
 *                 such as     #define BSP_USING_PWM1
 *
 * STEP 3, copy your pwm timer init function from stm32xxxx_hal_msp.c generated by stm32cubemx to the end if board.c file
 *                 such as     void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim_base)  and
 *                             void HAL_TIM_MspPostInit(TIM_HandleTypeDef* htim)
 *
 * STEP 4, modify your stm32xxxx_hal_config.h file to support pwm peripherals. define macro related to the peripherals
 *                 such as     #define HAL_TIM_MODULE_ENABLED
 *
 */

這是官方給的標準步驟，我按照這個步驟進行了好幾遍都沒有成功，錯誤每次都是幾十個，（也可能是我自己的問題），下面我分享下我成功的步驟，
STEP 1：
在RT-Thread Settings中使能PWM設備，

STEP 2：
注釋掉board.h中關于PWM的宏定義，

#define BSP_USING_PWM1     //你所使用的PWM   
/*#define BSP_USING_PWM2*/
/*#define BSP_USING_PWM3*/
#define BSP_USING_PWM1_CH1    //你使用的通道

STEP 3：
使用STM32CudeMX生成stm32f1xx_hal_msp.c檔案，

檔案位于Src檔案夾下,打開檔案我們復制HAL_TIM_MspPostInit函式到drv_pwm.c檔案下

void HAL_TIM_MspPostInit(TIM_HandleTypeDef* htim)
{
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(htim->Instance==TIM1)
  {
  /* USER CODE BEGIN TIM1_MspPostInit 0 */
  /* USER CODE END TIM1_MspPostInit 0 */
    __HAL_RCC_GPIOA_CLK_ENABLE();
    /**TIM1 GPIO Configuration    
    PA8     ------> TIM1_CH1 
    */
    GPIO_InitStruct.Pin = GPIO_PIN_8;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /* USER CODE BEGIN TIM1_MspPostInit 1 */

  /* USER CODE END TIM1_MspPostInit 1 */
  }
}

在drv_pwm.c檔案下修改一處

static void pwm_get_channel(void)
{
#ifdef BSP_USING_PWM1_CH1
    stm32_pwm_obj[PWM1_INDEX].channel |= 1 << 0;
    __HAL_RCC_TIM1_CLK_ENABLE(); //修改處使能定時器時鐘
#endif

STEP 4：
打開pwm_config.h檔案，參照給的例子添加，默認是沒有TIM1的，

#ifdef BSP_USING_PWM1
#ifndef PWM1_CONFIG
#define PWM1_CONFIG                             \
    {                                           \
       .tim_handle.Instance     = TIM1,         \
       .name                    = "pwm1",       \
       .channel                 = 0             \
    }
#endif /* PWM1_CONFIG */

#endif /* BSP_USING_PWM2 */
#ifdef BSP_USING_PWM2
#ifndef PWM2_CONFIG
#define PWM2_CONFIG                             \
    {                                           \
       .tim_handle.Instance     = TIM2,         \
       .name                    = "pwm2",       \
       .channel                 = 0             \
    }
#endif /* PWM2_CONFIG */
#endif /* BSP_USING_PWM2 */

最后打開stm32f1xx_hal_conf.h

/*#define HAL_SRAM_MODULE_ENABLED   */
#define HAL_TIM_MODULE_ENABLED   //取消注釋
#define HAL_UART_MODULE_ENABLED
/*#define HAL_USART_MODULE_ENABLED   */
/*#define HAL_WWDG_MODULE_ENABLED   */