L6218E: Undefined HAL_TIM_MspPostInit

发布于 2020-04-29 22:26:56 浏览：3956 订阅该版

ENV添加PWM外设，编译显示错误：
```
.\build\keil\Obj t-thread.axf: Error: L6218E:** Undefined symbol HAL_TIM_MspPostInit (referred from drv_pwm.o).**
```
drv_pwm.c中有函数定义 `extern void HAL_TIM_MspPostInit(TIM_HandleTypeDef *htim);`

并在 `static rt_err_t stm32_hw_pwm_init(struct stm32_pwm *device)` 中引用。

请问：
1.RTT添加PWM外设时，和MCU相关的初始化（Msp）都需要自己添加吗？添加的话添加在stm32f1xx_hal_msp.c 里面吗？

2.我用CUBE MX初始化PWM的代码tim.c中的`void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle)`代码直接拷贝到`HAL_TIM_MspPostInit（）`函数里面可以吗？

3.还有其他的需要自己添加的代码吗？**

用CUBE MX初始化PWM的代码：
```c
#include "tim.h"

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

TIM_HandleTypeDef htim2;

/* TIM2 init function */
**void MX_TIM2_Init(void)**
{
  TIM_ClockConfigTypeDef sClockSourceConfig = {0};
  TIM_MasterConfigTypeDef sMasterConfig = {0};
  TIM_OC_InitTypeDef sConfigOC = {0};

htim2.Instance = TIM2;
  htim2.Init.Prescaler = 0;
  htim2.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim2.Init.Period = 7199;
  htim2.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim2.Init.AutoReloadPreload = TIM_AUTORELOAD_PRELOAD_DISABLE;
  if (HAL_TIM_Base_Init(&htim2) != HAL_OK)
  {
    Error_Handler();
  }
  sClockSourceConfig.ClockSource = TIM_CLOCKSOURCE_INTERNAL;
  if (HAL_TIM_ConfigClockSource(&htim2, &sClockSourceConfig) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_TIM_PWM_Init(&htim2) != HAL_OK)
  {
    Error_Handler();
  }
  sMasterConfig.MasterOutputTrigger = TIM_TRGO_RESET;
  sMasterConfig.MasterSlaveMode = TIM_MASTERSLAVEMODE_DISABLE;
  if (HAL_TIMEx_MasterConfigSynchronization(&htim2, &sMasterConfig) != HAL_OK)
  {
    Error_Handler();
  }
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 0;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_TIM_PWM_ConfigChannel(&htim2, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)
  {
    Error_Handler();
  }
  HAL_TIM_MspPostInit(&htim2);

}

**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();
  /* USER CODE BEGIN TIM2_MspInit 1 */

/* USER CODE END TIM2_MspInit 1 */
  }
}
**void HAL_TIM_MspPostInit(TIM_HandleTypeDef* timHandle)**
{

GPIO_InitTypeDef GPIO_InitStruct = {0};
  if(timHandle->Instance==TIM2)
  {
  /* USER CODE BEGIN TIM2_MspPostInit 0 */

/* USER CODE END TIM2_MspPostInit 0 */

__HAL_RCC_GPIOA_CLK_ENABLE();
    /**TIM2 GPIO Configuration    
    PA1     ------> TIM2_CH2
    PA2     ------> TIM2_CH3 
    */
    GPIO_InitStruct.Pin = GPIO_PIN_1|GPIO_PIN_2;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

/* USER CODE BEGIN TIM2_MspPostInit 1 */

/* USER CODE END TIM2_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();
  /* USER CODE BEGIN TIM2_MspDeInit 1 */

/* USER CODE END TIM2_MspDeInit 1 */
  }
}

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
```