stm32f407 TIM1 输出四路pwm hal代码

以下是基于HAL库实现的stm32f407 TIM1输出四路PWM的代码。

首先，需要在CubeMX中配置TIM1的通道1、2、3、4为PWM输出模式，并设置频率和占空比。然后在main函数中初始化TIM1，并启动定时器：

#include "stm32f4xx_hal.h"

TIM_HandleTypeDef htim1;

// 初始化TIM1
void MX_TIM1_Init(void)
{
  TIM_OC_InitTypeDef sConfigOC = {0};

  htim1.Instance = TIM1;
  htim1.Init.Prescaler = 0;
  htim1.Init.CounterMode = TIM_COUNTERMODE_UP;
  htim1.Init.Period = 8399;
  htim1.Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
  htim1.Init.RepetitionCounter = 0;
  if (HAL_TIM_PWM_Init(&htim1) != HAL_OK)
  {
    Error_Handler();
  }
  sConfigOC.OCMode = TIM_OCMODE_PWM1;
  sConfigOC.Pulse = 4199;
  sConfigOC.OCPolarity = TIM_OCPOLARITY_HIGH;
  sConfigOC.OCFastMode = TIM_OCFAST_DISABLE;
  if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_1) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_2) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_3) != HAL_OK)
  {
    Error_Handler();
  }
  if (HAL_TIM_PWM_ConfigChannel(&htim1, &sConfigOC, TIM_CHANNEL_4) != HAL_OK)
  {
    Error_Handler();
  }
}

int main(void)
{
  HAL_Init();

  MX_TIM1_Init();

  HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);
  HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_2);
  HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_3);
  HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_4);

  while (1)
  {

  }
}

然后，可以通过修改TIM1的CCR寄存器的值来改变占空比。例如，下面的代码将通道1的占空比设置为50%：

HAL_TIM_PWM_Stop(&htim1, TIM_CHANNEL_1);
htim1.Instance->CCR1 = 4199; // 50% 占空比
HAL_TIM_PWM_Start(&htim1, TIM_CHANNEL_1);

同理，可以分别修改通道2、3、4的CCR寄存器的值来改变它们的占空比。