RT-Thread Studio 输出PWM详细教程

/** 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 * */

这是官方给的标准步骤，我按照这个步骤进行了好几遍都没有成功，错误每次都是几十个，（也多是我本身的问题），下面我分享下我成功的步骤。
STEP 1：
在RT-Thread Settings中使能PWM设备。

STEP 2：
注释掉board.h中关于PWM的宏定义。

#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文件。

文件位于Src文件夹下,打开文件咱们复制HAL_TIM_MspPostInit函数到drv_pwm.c文件下

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文件下修改一处

static void pwm_get_channel(void)
{ 
#ifdef BSP_USING_PWM1_CH1
    stm32_pwm_obj[PWM1_INDEX].channel |= 1 << 0;
    __HAL_RCC_TIM1_CLK_ENABLE(); //修改处使能定时器时钟
#endif

STEP 4：
打开pwm_config.h文件，参照给的例子添加。默认是没有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 */

最后打开stm32f1xx_hal_conf.h

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