pwm程序问题

Qlm · 发表于 2016-3-16 21:15:51

最近在做一个需要pwm输出的电机，代码如下，使用外部中断设置PE.2和PE.3分别是输入的加速减速信号，用TIM2的CH3通道输出pwm信号，但是为什么没有输出信号？小弟新手，是在找不出问题在哪了。。。求大神助攻。
代码如下：
#include <stm32f10x.h>
#include <delay.h> //ÎªÊ²Ã´Òª°üº¬Í·ÎÄ¼þÄØ£¿ÒòÎªÀïÃæÓÐÒªÓÃµÄº¯ÊýÉêÃ÷£¬º¯ÊýÎªÊ²Ã´ÒªÉêÃ÷ÄØ£¿ÒòÎªÒª·ÖÅäÄÚ´æµ¥Ôª°¡¡£¡£
#include <sys.h> //PBÒªÓÃ¡&#162

Bout(x)¡&#162

Bin(x)¡¢ÓÃÆðÀ´»á·Ç³£·½±ã
#include <stdio.h>

void RCC_Configuration(void);
void Pwm_Configuration(void);
void NVIC_Configuration(void);
void HellIo_Configuration(void);
void USART1_Configuration(void);
s16 speed=2;//speedµµµÄÖµ£¬speed=(0,1,2,3,4,5)³õÊ¼ÖµÎª2
s16 com=720;
s16 comnow=900;

int main()
{
s16 num=0;//²îÖµ
while(1){
      switch(speed){
         case 0:com=900;
         break;
         case 1:com=720;
         break;
         case 2:com=540;
         break;
         case 3:com=360;
         break;
         case 4:com=180;
         break;
         case 5:com=0;
         break;
      }
      num = com-comnow;
      if(num==0){
         comnow = comnow;
      }else if(num>0){
         comnow = comnow + 45;
      }else {
         comnow = comnow - 45;
      }
TIM_SetCompare3(TIM2,comnow);

}

}

void RCC_Configuration(void)
{
/* SYSCLK, HCLK, PCLK2 and PCLK1 configuration -----------------------------*/
RCC_DeInit();
//RCC_HSEConfig(RCC_HSE_ON);
//HSEStartUpStatus = RCC_WaitForHSEStartUp();

/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);//Ê¹ÄÜ»º³å
/* Flash 2 wait state */
FLASH_SetLatency(FLASH_Latency_2);//cupµÄÔËÐÐÆµÂÊ¸ß£¬¶øÄÚ²¿flashµÄÔËÐÐÆµÂÊµÍ£¬ËùÒÔcpuÒª´ÓflashÖÐÈ¡Ö¸Áîµ±È»ÒªÓÐ¸öµÈ´ýµÄÊ±¼äÁË¡£


/* HCLK = SYSCLK */
RCC_HCLKConfig(RCC_SYSCLK_Div1);

/* PCLK2 = HCLK */
RCC_PCLK2Config(RCC_HCLK_Div1);

/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);

/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSI_Div2, RCC_PLLMul_16);

/* Enable PLL */
RCC_PLLCmd(ENABLE);//±¶ÆµÊ¹ÄÜ
while (RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
{
}
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
while(RCC_GetSYSCLKSource() != 0x08)
{
}

/*elseÕâ¶Î´úÂë×öµÃºÜÖÜµ½£¬¿ÉÒÔ¼Ó¸ö·äÃùÆ÷ÌáÊ¾Ê²Ã´µÄ*/

//ÒÔºó¿ªÆôÍâÉèÊ±ÖÓ¾ÍÔÚÕâ¿é¿ª£¡£¡£¡
//¿ªÆôGPIOÊ±ÖÓ
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);

//RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

}

void NVIC_Configuration(void)
{
EXTI_InitTypeDef EXTI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);//Íâ²¿ÖÐ¶Ï£¬ÐèÒªÊ¹ÄÜAFIOÊ±ÖÓ

//GPIOE.2 ÖÐ¶ÏÏßÒÔ¼°ÖÐ¶Ï³õÊ¼»¯ÅäÖÃ
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOE,GPIO_PinSource2);

   EXTI_InitStructure.EXTI_Line=EXTI_Line2;
   EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
   EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;//ÉÏÉýÑØ´¥·¢
   EXTI_InitStructure.EXTI_LineCmd = ENABLE;
   EXTI_Init(&EXTI_InitStructure);       //¸ù¾ÝEXTI_InitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯ÍâÉèEXTI¼Ä´æÆ÷

//GPIOE.3 ÖÐ¶ÏÏßÒÔ¼°ÖÐ¶Ï³õÊ¼»¯ÅäÖÃ
   GPIO_EXTILineConfig(GPIO_PortSourceGPIOE,GPIO_PinSource3);

   EXTI_InitStructure.EXTI_Line=EXTI_Line3;
   EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
   EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;//ÉÏÉýÑØ´¥·¢
   EXTI_InitStructure.EXTI_LineCmd = ENABLE;
   EXTI_Init(&EXTI_InitStructure);       //¸ù¾ÝEXTI_InitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯ÍâÉèEXTI¼Ä´æÆ÷

   NVIC_InitStructure.NVIC_IRQChannel = EXTI2_IRQn;          //Ê¹ÄÜ°´¼üËùÔÚµÄÍâ²¿ÖÐ¶ÏÍ¨µÀ
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //ÇÀÕ¼ÓÅÏÈ¼¶2
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;                   //×ÓÓÅÏÈ¼¶1
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;                               //Ê¹ÄÜÍâ²¿ÖÐ¶ÏÍ¨µÀ
   NVIC_Init(&NVIC_InitStructure);       //¸ù¾ÝNVIC_InitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯ÍâÉèNVIC¼Ä´æÆ÷

      NVIC_InitStructure.NVIC_IRQChannel = EXTI3_IRQn;          //Ê¹ÄÜ°´¼üËùÔÚµÄÍâ²¿ÖÐ¶ÏÍ¨µÀ
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x02; //ÇÀÕ¼ÓÅÏÈ¼¶2
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x01;                   //×ÓÓÅÏÈ¼¶1
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;                               //Ê¹ÄÜÍâ²¿ÖÐ¶ÏÍ¨µÀ
   NVIC_Init(&NVIC_InitStructure);       //¸ù¾ÝNVIC_InitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯ÍâÉèNVIC¼Ä´æÆ÷

}

void EXTI2_IRQHandler(void)//ÊÕµ½¼ÓËÙÐÅºÅºó£¬½øÐÐ´¦Àí£¬Î´Ð´
{
delay_ms(10); //Ïû¶¶
if(1<=speed<=5){
         speed++;
}

}
void EXTI3_IRQHandler(void) //ÊÕµ½¼õËÙÐÅºÅºó£¬½øÐÐ´¦Àí£¬Î´Ð´
{
delay_ms(10); //Ïû¶¶
      if(1<=speed<=5){
         speed--;
}
}

void HellIo_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;

   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);//Ê¹Ä&#220

ORTBÊ±ÖÓ

GPIO_PinRemapConfig(GPIO_Remap_SWJ_JTAGDisable, ENABLE);//¹Ø±Õjtag£¬Ê¹ÄÜSWD£¬¿ÉÒÔÓÃSWDÄ£Ê½µ÷ÊÔ

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_2;//PA15
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //ÉèÖÃ³ÉÉÏÀÊäÈë
   GPIO_Init(GPIOE, &GPIO_InitStructure);//³õÊ¼»¯GPIOE2

GPIO_InitStructure.GPIO_Pin  = GPIO_Pin_3;//PA15
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD; //ÉèÖÃ³ÉÉÏÀÊäÈë
   GPIO_Init(GPIOE, &GPIO_InitStructure);//³õÊ¼»¯GPIOE3
}

//num:Ô¤×°ÔØÖµ£¬fpz£ºTIMx·ÖÆµÖµ1~65535
void Pwm_Configuration(void)
{
   GPIO_InitTypeDef GPIO_InitStructure;

   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);//Ê¹Ä&#220

ORTA,PORTCÊ±ÖÓ

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//PIO_SetBits(GPIOA,GPIO_Pin_8); //PA.0 Êä³ö¸ß

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_Init(GPIOA, &GPIO_InitStructure);
//GPIO_SetBits(GPIOA,GPIO_Pin_8); //PA.1 Êä³ö¸ß

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// GPIO_SetBits(GPIOA,GPIO_Pin_8); //PA.2 Êä³ö¸ß

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// GPIO_SetBits(GPIOA,GPIO_Pin_8); //PA.3 Êä³ö¸ß

//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
//GPIO_Init(GPIOA, &GPIO_InitStructure);
// GPIO_SetBits(GPIOA,GPIO_Pin_8); //PA.4 Êä³ö¸ß

//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
//GPIO_Init(GPIOA, &GPIO_InitStructure);
// GPIO_SetBits(GPIOA,GPIO_Pin_8); //PA.5 Êä³ö¸ß

//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
//GPIO_Init(GPIOA, &GPIO_InitStructure);
// GPIO_SetBits(GPIOA,GPIO_Pin_8); //PA.6 Êä³ö¸ß

//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
//GPIO_Init(GPIOA, &GPIO_InitStructure);
// GPIO_SetBits(GPIOA,GPIO_Pin_8); //PA.7 Êä³ö¸ß

  TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);

TIM_TimeBaseStructure.TIM_Period = 900; //ÉèÖÃÔÚÏÂÒ»¸ö¸üÐÂÊÂ¼þ×°Èë»î¶¯µÄ×Ô¶¯ÖØ×°ÔØ¼Ä´æÆ÷ÖÜÆÚµÄÖµ //²ÎÊý±ØÐëÊÇ0x0000 and 0xFFFF£¬¡¾¼ÆÊýÆ÷Ò»¸öÖÜÆÚµÄ¼ÆÊý×ÜÊý¡¿
TIM_TimeBaseStructure.TIM_Prescaler =0; //ÉèÖÃÓÃÀ´×÷ÎªTIMxÊ±ÖÓÆµÂÊ³ýÊýµÄÔ¤·ÖÆµÖµ  ²»·ÖÆµ¡¾ÕâÐ©µÄµ÷½Ú¶¼»áÓ°Ïìµ½×îºóµÄpwm²¨ÐÎ£¡£¡£¡¡¿¡¾·ÖÆµÖÜÆÚ±ä³¤¡¢±¶ÆµÖÜÆÚ±ä¶Ì¡¿
TIM_TimeBaseStructure.TIM_ClockDivision = 0; //ÉèÖÃÊ±ÖÓ·Ö¸î:TDTS = Tck_tim       ¡¾¿´ÆðÀ´²¢Ã»Ê²Ã´ÄñÓÃ£¡£¡¡¿
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIMÏòÉÏ¼ÆÊýÄ£Ê½

TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure); //¸ù¾ÝTIM_TimeBaseInitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯TIMxµÄÊ±¼ä»ùÊýµ¥Î»¡¾ÕæÕýÆð×÷ÓÃµÄ³õÊ¼»¯£¡£¡Ê±»ùµ¥Ôª£¡£¡£¡¡¿

  /* Output Compare Active Mode configuration: Channel1 */
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´ý×°Èë²¶»ñ±È½Ï¼Ä´æÆ÷µÄÂö³åÖµ
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low; //Êä³ö¼«ÐÔ:TIMÊä³ö±È½Ï¼«ÐÔµÍ

TIM_OC1Init(TIM2, &TIM_OCInitStructure);  //¸ù¾ÝTIM_OCInitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯ÍâÉèTIMx ¡¾TIM_OC3InitËµÃ÷Ñ¡ÔñµÄÊÇchannel3¡¿Í¨µÀ1
  TIM_OC2Init(TIM2, &TIM_OCInitStructure);  //¸ù¾ÝTIM_OCInitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯ÍâÉèTIMx ¡¾TIM_OC3InitËµÃ÷Ñ¡ÔñµÄÊÇchannel3¡¿Í¨µÀ2
  TIM_OC3Init(TIM2, &TIM_OCInitStructure);  //¸ù¾ÝTIM_OCInitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯ÍâÉèTIMx ¡¾TIM_OC3InitËµÃ÷Ñ¡ÔñµÄÊÇchannel3¡¿Í¨µÀ3
  TIM_OC4Init(TIM2, &TIM_OCInitStructure);  //¸ù¾ÝTIM_OCInitStructÖÐÖ¸¶¨µÄ²ÎÊý³õÊ¼»¯ÍâÉèTIMx ¡¾TIM_OC3InitËµÃ÷Ñ¡ÔñµÄÊÇchannel3¡¿Í¨µÀ4

  TIM_OC1PreloadConfig(TIM2, TIM_OCPreload_Enable);  //Ê¹ÄÜTIMxÔÚCCR3ÉÏµÄÔ¤×°ÔØ¼Ä´æÆ÷¡¾Ô¤×°ÔØ£¡£¡¡¿
TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);//
TIM_OC3PreloadConfig(TIM2, TIM_OCPreload_Enable);
TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Enable);

TIM_ARRPreloadConfig(TIM2, ENABLE); //Ê¹ÄÜTIMxÔÚARRÉÏµÄÔ¤×°ÔØ¼Ä´æÆ÷¡¾Ô¤×°ÔØ¼Ä´æÆ÷ºÍÓ°×Ó¼Ä´æÆ÷ÏëÏàÍ¨¿

TIM_Cmd(TIM2, ENABLE);  //Ê¹ÄÜTIM1

}