PWM输出实验中预装载问题

蜡笔 · 发表于 2018-4-1 23:46:36

我用的是CUBEmx生成代码，参照原子的代码写好了改变重装载值函数，但是实现不了实时改变重装载值，代码如下，找不到库函数里面怎么使能预装载寄存器的函数，求大神帮帮忙。
#include "tim.h"

TIM_HandleTypeDef htim14;
TIM_OC_InitTypeDef sConfigOC;

/* TIM14 init function */
void MX_TIM14_Init(void)
{

  htim14.Instance = TIM14;
  htim14.Init.Prescaler = 42;
  htim14.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim14.Init.Period = 500;
  htim14.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  HAL_TIM_Base_Init(&htim14);

  HAL_TIM_PWM_Init(&htim14);

  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 10;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_LOW;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  HAL_TIM_PWM_ConfigChannel(&htim14, &sConfigOC, TIM_CHANNEL_1);

  HAL_TIM_MspPostInit(&htim14);

}

void HAL_TIM_Base_MspInit(TIM_HandleTypeDef* htim_base)
{

  if(htim_base->Instance==TIM14)
  {
  /* USER CODE BEGIN TIM14_MspInit 0 */

  /* USER CODE END TIM14_MspInit 0 */
/* Peripheral clock enable */
__HAL_RCC_TIM14_CLK_ENABLE();

/* Peripheral interrupt init */
HAL_NVIC_SetPriority(TIM8_TRG_COM_TIM14_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(TIM8_TRG_COM_TIM14_IRQn);
  /* USER CODE BEGIN TIM14_MspInit 1 */

  /* USER CODE END TIM14_MspInit 1 */
  }
}
void HAL_TIM_MspPostInit(TIM_HandleTypeDef* htim)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  if(htim->Instance==TIM14)
  {
  /* USER CODE BEGIN TIM14_MspPostInit 0 */

  /* USER CODE END TIM14_MspPostInit 0 */

/**TIM14 GPIO Configuration
PF9    ------> TIM14_CH1
*/
GPIO_InitStruct.Pin = GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF9_TIM14;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);

  /* USER CODE BEGIN TIM14_MspPostInit 1 */

  /* USER CODE END TIM14_MspPostInit 1 */
  }

}

void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef* htim_base)
{

  if(htim_base->Instance==TIM14)
  {
  /* USER CODE BEGIN TIM14_MspDeInit 0 */

  /* USER CODE END TIM14_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_TIM14_CLK_DISABLE();

/* Peripheral interrupt Deinit*/
HAL_NVIC_DisableIRQ(TIM8_TRG_COM_TIM14_IRQn);

  }
  /* USER CODE BEGIN TIM14_MspDeInit 1 */

  /* USER CODE END TIM14_MspDeInit 1 */
}

/* USER CODE BEGIN 1 */
void TIM14_Init(void)
{
MX_TIM14_Init();
HAL_TIM_MspPostInit(&htim14);
HAL_TIM_PWM_Start(&htim14, TIM_CHANNEL_1);

}
void TIM_SETComplare(uint16_t complare)
{
sConfigOC.Pulse=complare;
}

是不是这个函数使能的，但是用了不行
HAL_StatusTypeDef HAL_TIM_PWM_ConfigChannel(TIM_HandleTypeDef *htim, TIM_OC_InitTypeDef* sConfig, uint32_t Channel)
{
  __HAL_LOCK(htim);

  /* Check the parameters */
  assert_param(IS_TIM_CHANNELS(Channel));
  assert_param(IS_TIM_PWM_MODE(sConfig->OCMode));
  assert_param(IS_TIM_OC_POLARITY(sConfig->OCPolarity));
  assert_param(IS_TIM_FAST_STATE(sConfig->OCFastMode));

  htim->State = HAL_TIM_STATE_BUSY;

  switch (Channel)
  {
case TIM_CHANNEL_1:
{
   assert_param(IS_TIM_CC1_INSTANCE(htim->Instance));
   /* Configure the Channel 1 in PWM mode */
   TIM_OC1_SetConfig(htim->Instance, sConfig);

   /* Set the Preload enable bit for channel1 */
   htim->Instance->CCMR1 |= TIM_CCMR1_OC1PE;

   /* Configure the Output Fast mode */
   htim->Instance->CCMR1 &= ~TIM_CCMR1_OC1FE;
   htim->Instance->CCMR1 |= sConfig->OCFastMode;
}
break;