pwm驱动步进电机动不了,求助,

龙吟殷九洲 · 发表于 2019-1-15 10:34:49

我最近做pwm控制步进电机我感觉程序没什么问题为什么电机一点反应也没有求原子哥和大神解答
PWM的输出口为PA7和PF9
PWM.c

#include "pwm.h"
#include "led.h"
#include "usart.h"

void TIM14_PWM_Init(u32 arr,u32 psc)
{

GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14,ENABLE);    //TIM14ê±Öóê1Äü
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF, ENABLE); //ê1ÄüPORTFê±Öó
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
   GPIO_PinAFConfig(GPIOF,GPIO_PinSource9,GPIO_AF_TIM14); ///GPIOF9¸′óÃÎa¶¨ê±Æ÷14
GPIO_PinAFConfig(GPIOA,GPIO_PinSource7,GPIO_AF_TIM14);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;          //GPIOF9
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;       //¸′óÃ1|Äü
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //Ëù¶è100MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;    //íÆíì¸′óÃêä3ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;       //éÏà-
GPIO_Init(GPIOF,&GPIO_InitStructure);             //3õê¼»ˉPF9

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;          //GPIOF9
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;       //¸′óÃ1|Äü
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //Ëù¶è100MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;    //íÆíì¸′óÃêä3ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;       //éÏà-
GPIO_Init(GPIOA,&GPIO_InitStructure);

TIM_TimeBaseStructure.TIM_Prescaler=psc;  //¶¨ê±Æ÷·ÖÆμ
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up; //ÏòéÏ¼ÆêyÄ￡ê½
TIM_TimeBaseStructure.TIM_Period=arr; //×Ô¶ˉÖØ×°ÔØÖμ
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;

TIM_TimeBaseInit(TIM14,&TIM_TimeBaseStructure);//3õê¼»ˉ¶¨ê±Æ÷14

//3õê¼»ˉTIM14 Channel1 PWMÄ￡ê½
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //Ñ¡Ôñ¶¨ê±Æ÷Ä￡ê½:TIMÂö3å¿í¶èμ÷ÖÆÄ￡ê½2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±è½Ïêä3öê1Äü
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //êä3ö¼«DÔ:TIMêä3ö±è½Ï¼«DÔμí
TIM_OC1Init(TIM14, &TIM_OCInitStructure);  //¸ù¾YTÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèTIM1 4OC1

TIM_OC1PreloadConfig(TIM14, TIM_OCPreload_Enable);  //ê1ÄüTIM14ÔúCCR1éÏμÄÔ¤×°ÔØ¼Ä′æÆ÷

  TIM_ARRPreloadConfig(TIM14,ENABLE);//ARPEê1Äü

TIM_Cmd(TIM14, ENABLE);  //ê1ÄüTIM14


}

电机接口为PA12  PA13
PF9 PF10

#include "led.h"
void LED_Init(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOF, ENABLE);//ê1ÄüGPIOFê±Öó

  //GPIOF9,F103õê¼»ˉéèÖÃ
  GPIO_InitStructure.GPIO_Pin =GPIO_Pin_9 | GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//ÆÕí¨êä3öÄ￡ê½
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//íÆíìêä3ö
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//éÏà-
  GPIO_Init(GPIOF, &GPIO_InitStructure);//3õê¼»ˉ

GPIO_SetBits(GPIOF,GPIO_Pin_9 | GPIO_Pin_10);//GPIOF9,F10éèÖÃ¸ß￡¬μÆÃe

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);//ê1ÄüGPIOFê±Öó

  //GPIOF9,F103õê¼»ˉéèÖÃ
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12|GPIO_Pin_13;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//ÆÕí¨êä3öÄ￡ê½
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//íÆíìêä3ö
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//éÏà-
  GPIO_Init(GPIOA, &GPIO_InitStructure);//3õê¼»ˉ

GPIO_SetBits(GPIOA,GPIO_Pin_12|GPIO_Pin_13);//GPIOF9,F10éèÖÃ¸ß￡¬μÆÃe

}

#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "pwm.h"

主函数
int main(void)
{
u16 led0pwmval=300;

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
delay_init(168);
uart_init(115200);
TIM14_PWM_Init(500-1,84-1);
while(1)
{
TIM_SetCompare1(TIM14,led0pwmval);
}
}