我的是迷你板，跟着原子哥的pwm例程做，不知道为什么编译通过了，可输不出pwm波，求大神解疑

HYTROGEN · 发表于 2019-4-30 15:56:48

#include "timer.h"

void TIM3_PWM_Init(u16 arr,u16 psc)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseInitStructure;
  TIM_OCInitTypeDef TIM_OCInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;    //LED0-->PA.8 ¶Ë¿úÅäÖÃ
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;    //íÆíìêä3ö
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;    //IO¿úËù¶èÎa50MHz
  GPIO_Init(GPIOA, &GPIO_InitStructure);    //¸ù¾Yéè¶¨2Îêy3õê¼»ˉGPIOA.8

GPIO_PinRemapConfig(GPIO_PartialRemap_TIM3,ENABLE);

  TIM_TimeBaseInitStructure.TIM_ClockDivision=0;
TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInitStructure.TIM_Period=arr;
TIM_TimeBaseInitStructure.TIM_Prescaler=psc;
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);

TIM_OCInitStructure.TIM_OCMode=TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OCPolarity=TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OutputState=TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0; //éèÖÃ′y×°èë2¶»ñ±è½Ï¼Ä′æÆ÷μÄÂö3åÖμ
TIM_OC2Init(TIM3,&TIM_OCInitStructure);

TIM_CtrlPWMOutputs(TIM3,ENABLE);

TIM_OC2PreloadConfig(TIM3,TIM_OCPreload_Enable);

TIM_ARRPreloadConfig(TIM3,ENABLE);

TIM_Cmd(TIM3,ENABLE);
}

int main(void)
{
u16 led0pwmval=0;
u8 dir=1;
delay_init();            //Ñóê±oˉêy3õê¼»ˉ
LED_Init();       //3õê¼»ˉóëLEDá¬½óμÄó2¼t½ó¿ú
TIM3_PWM_Init(899,0);//2»·ÖÆμ¡￡PWMÆμÂê=72000/(899+1)=80Khz
   while(1)
{
delay_ms(10);
if(dir)led0pwmval++;
else led0pwmval--;
if(led0pwmval>300)dir=0;
if(led0pwmval==0)dir=1;
TIM_SetCompare1(TIM3,led0pwmval);
}
}

1599064432 · 发表于 2019-4-30 15:58:54

中断函数没写吗

peng1554 · 发表于 2019-4-30 16:39:26

参考附件

HYTROGEN · 发表于 2019-4-30 17:39:45

1599064432 发表于 2019-4-30 15:58
中断函数没写吗

pwm也需要中断函数控制么，可我看原子哥的例程里没用啊

HYTROGEN · 发表于 2019-4-30 18:10:31

peng1554 发表于 2019-4-30 16:39
参考附件

还是不行，就算是把原子哥给的程序改成TIM3和OC2也不行
这是原子哥的例程的程序
int main(void)
{
u16 led0pwmval=0;
u8 dir=1;
delay_init();            //Ñóê±oˉêy3õê¼»ˉ
LED_Init();       //3õê¼»ˉóëLEDá¬½óμÄó2¼t½ó¿ú
TIM1_PWM_Init(899,0);//2»·ÖÆμ¡￡PWMÆμÂê=72000/(899+1)=80Khz
   while(1)
{
delay_ms(10);
if(dir)led0pwmval++;
else led0pwmval--;
if(led0pwmval>300)dir=0;
if(led0pwmval==0)dir=1;
TIM_SetCompare1(TIM1,led0pwmval);
}
}

#include "pwm.h"
#include "led.h"
//////////////////////////////////////////////////////////////////////////////////
//±¾3ìDòÖ»1©Ñ§Ï°ê1óÃ￡¬Î′¾-×÷ÕßDí¿é￡¬2»μÃóÃóúÆäËüèÎoÎóÃí¾
//ALIENTEK Mini STM32¿a·￠°å
//PWM  Çy¶ˉ′úÂë
//ÕyμãÔ-×ó@ALIENTEK
//¼¼êõÂÛì3:www.openedv.com
//DT¸ÄèÕÆú:2010/12/03
//°æ±¾￡oV1.0
//°æè¨ËùóD￡¬μá°æ±Ø¾¿¡￡
//Copyright(C) ÕyμãÔ-×ó 2009-2019
//All rights reserved
//////////////////////////////////////////////////////////////////////////////////

//PWMêä3ö3õê¼»ˉ
//arr￡o×Ô¶ˉÖØ×°Öμ
//psc￡oê±ÖóÔ¤·ÖÆμêy
void TIM1_PWM_Init(u16 arr,u16 psc)
{
   GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);//
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);  //ê1ÄüGPIOíaéèê±Öóê1Äü


//éèÖÃ¸Ãòy½ÅÎa¸′óÃêä3ö1|Äü,êä3öTIM1 CH1μ&#196

WMÂö3å2¨DÎ
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8; //TIM_CH1
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  //¸′óÃíÆíìêä3ö
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

TIM_TimeBaseStructure.TIM_Period = arr; //éèÖÃÔúÏÂò»¸ö¸üDÂêÂ¼t×°èë»î¶ˉμÄ×Ô¶ˉÖØ×°ÔØ¼Ä′æÆ÷ÖüÆúμÄÖμ    80K
TIM_TimeBaseStructure.TIM_Prescaler =psc; //éèÖÃóÃà′×÷ÎaTIMxê±ÖóÆμÂê3yêyμÄÔ¤·ÖÆμÖμ  2»·ÖÆμ
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //éèÖÃê±Öó·Ö¸î:TDTS = Tck_tim
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIMÏòéÏ¼ÆêyÄ￡ê½
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure); //¸ù¾YTIM_TimeBaseInitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉTIMxμÄê±¼ä»ùêyμ￥Î»

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2; //Ñ¡Ôñ¶¨ê±Æ÷Ä￡ê½:TIMÂö3å¿í¶èμ÷ÖÆÄ￡ê½2
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable; //±è½Ïêä3öê1Äü
TIM_OCInitStructure.TIM_Pulse = 0; //éèÖÃ′y×°èë2¶»ñ±è½Ï¼Ä′æÆ÷μÄÂö3åÖμ
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High; //êä3ö¼«DÔ:TIMêä3ö±è½Ï¼«DÔ¸ß
TIM_OC1Init(TIM1, &TIM_OCInitStructure);  //¸ù¾YTIM_OCInitStructÖDÖ¸¶¨μÄ2Îêy3õê¼»ˉíaéèTIMx

  TIM_CtrlPWMOutputs(TIM1,ENABLE); //MOE Ö÷êä3öê1Äü

TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);  //CH1Ô¤×°ÔØê1Äü

TIM_ARRPreloadConfig(TIM1, ENABLE); //ê1ÄüTIMxÔúARRéÏμÄÔ¤×°ÔØ¼Ä′æÆ÷

TIM_Cmd(TIM1, ENABLE);  //ê1ÄüTIM1

}

HYTROGEN · 发表于 2019-4-30 18:14:42

只是我改了的
int main(void)
{
u16 led0pwmval=0;
u8 dir=1;
delay_init();
LED_Init();
TIM3_PWM_Init(899,0);
   while(1)
{
delay_ms(10);
if(dir)led0pwmval++;
else led0pwmval--;
if(led0pwmval>300)dir=0;
if(led0pwmval==0)dir=1;
TIM_SetCompare2(TIM1,led0pwmval);
}
}

void TIM3_PWM_Init(u16 arr,u16 psc)
{
   GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA , ENABLE);


GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);

TIM_TimeBaseStructure.TIM_Period = arr;
TIM_TimeBaseStructure.TIM_Prescaler =psc;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 0;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC2Init(TIM3, &TIM_OCInitStructure);

      TIM_CtrlPWMOutputs(TIM3,ENABLE);
TIM_OC2PreloadConfig(TIM3, TIM_OCPreload_Enable);

TIM_ARRPreloadConfig(TIM3, ENABLE);

TIM_Cmd(TIM3, ENABLE);

}