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标题: 新人求助大神PWM输出问题 [打印本页]

作者: 张衍波 时间: 2015-10-7 14:53
标题: 新人求助大神PWM输出问题
我在用PWM控制电调的时候，下面的程序编译没问题，但是下进芯片后还是无法驱动电调，不知为何。
main 函数
#include "bsp-led.h"
static void DMP_Delay ( __IO uint32_t nCount )
{
  for ( ; nCount != 0; nCount -- );

}

unsigned int time=90;

int main(void)
{
      TIM2_PWM_Init(1199,1199);
      Motor_Control(60);
      DMP_Delay(5000000);
      DMP_Delay(5000000);

         while(1)
                     {
                              time=+10;
                              if(time>=119)
                              {time=119;}
                     }

                     Motor_Control(time);
                     DMP_Delay (5000000);//
                     DMP_Delay (5000000);//
   DMP_Delay (5000000);//
                     DMP_Delay (5000000);//
}
#include"bsp-led.h"

void Motor_Control(float one)
{
            TIM2->CCR1=one;
}

.c函数
void TIM2_PWM_Init(u32 per,u32 psc)
{
      GPIO_InitTypeDef GPIO_InitStructure;
      TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
      TIM_OCInitTypeDef TIM_OCInitStructure;
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

  TIM_TimeBaseStructure.TIM_Period=per;
  TIM_TimeBaseStructure.TIM_Prescaler=psc;
      TIM_TimeBaseStructure.TIM_ClockDivision=0;
      TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
      TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

      TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
      TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
      TIM_OCInitStructure.TIM_Pulse =1199;
      TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;

      TIM_OC1Init(TIM2, &TIM_OCInitStructure);       //???????¨??
      TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);

      TIM_Cmd(TIM2,ENABLE);

}

.h函数
#ifndef _LED_H
#define _LED_H

#include"stm32f10x.h"

void TIM2_PWM_Init(u32 per,u32 psc);

void Motor_Control(float one);

#endif
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