关于用stm32f407使用pwm驱动直流电机的疑问。

飞弟 · 发表于 2019-12-12 00:14:38

使用的是stm32f407的板子，用pwm驱动直流电机，板子的引脚高低电平有输出，PA4和PA5。。一个3.3V，一个0V。pwm波有输出。但经过电机驱动模块后的输出为0

电机驱动模块经测试可用，用f1的板子写的程序电机能转。。。

以下是我的程序：
pwm.c
void PWM_Configuration(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
  TIM_OCInitTypeDef TIM_OCInitStructure;

  RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC|RCC_AHB1Periph_GPIOA, ENABLE);

  GPIO_PinAFConfig(GPIOC,GPIO_PinSource9,GPIO_AF_TIM3);

  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_9;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(GPIOC,&GPIO_InitStructure);

  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_4 | GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
  GPIO_Init(GPIOA,&GPIO_InitStructure);

  TIM_TimeBaseStructure.TIM_Period= 500 - 1;
  TIM_TimeBaseStructure.TIM_Prescaler= 84-1;
  TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
  TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
  TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);

  TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
  TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
  TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

  TIM_OC4Init(TIM3, &TIM_OCInitStructure);

  TIM_OC4PreloadConfig(TIM3, TIM_OCPreload_Enable);

  TIM_ARRPreloadConfig(TIM3,ENABLE);

  TIM_Cmd(TIM3, ENABLE);
}
pwm.h
#define D_IN1_H  GPIO_SetBits(GPIOA,GPIO_Pin_4)
#define D_IN1_L  GPIO_ResetBits(GPIOA,GPIO_Pin_4)

#define D_IN2_H  GPIO_SetBits(GPIOA,GPIO_Pin_5)
#define D_IN2_L  GPIO_ResetBits(GPIOA,GPIO_Pin_5)

void PWM_Configuration(void);

int main(void)
{
  SystemInit();
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

  PWM_Configuration();

while(1)
{
         delay_ms(10);
         D_IN1_H  ;
         D_IN2_L  ;
         TIM->CC4=300;
         //TIM_SetCompare4(TIM3, 300);
         delay_ms(10);
}
}

不知道哪里出了问题。。哪位大佬来帮帮忙。。