F4板子，两个定时器同时工作时，只有一个工作正常，怎么回事？-challenger的回答

F4板子，两个定时器同时工作时，只有一个工作正常，怎么回事？

2019-07-20 15:27发布

本帖最后由 challenger 于 2017-4-5 20:58 编辑

stm32F4，GPS模块接在串口3上，定时器7控制串口3中断（原子哥例程），GPRS模块接在串口2上（改了原子哥串口3的配制代码，变成串口2接GPRS模块），本来也是定时器7控制中断，被我改为定时器5控制中断。GPRS与GPS两个程序分开运行都正常。可是合并后，只能运行一个GPRS，怎么回事？是中断优先级没设置好，或是定时器7与定时器5中的哪个变量重复使用了，运行异常？

这是串口2配制，复制串口3，更改的：

__align(8) u8 USART2_TX_BUF[USART2_MAX_SEND_LEN];       //·￠Ëí»o3å,×î′óUSART2_MAX_SEND_LEN×Ö½ú
#ifdef USART2_RX_EN                                                                //èç1ûê1ÄüáË½óêÕ
u8 USART2_RX_BUF[USART2_MAX_RECV_LEN];

u16 USART2_RX_STA=0;
void USART2_IRQHandler(void)
{
      u8 res;
      if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)//½óêÕμ½êy¾Y
      {

      res =USART_ReceiveData(USART2);
      if((USART2_RX_STA&(1<<15))==0)                //½óêÕíêμÄò»Åúêy¾Y,»1Ã»óD±»′|àí,Ôò2»Ôù½óêÕÆäËûêy¾Y
      {
            if(USART2_RX_STA<USART2_MAX_RECV_LEN)             //»1¿éòÔ½óêÕêy¾Y
            {
                     //TIM_SetCounter(TIM7,0);                //¼ÆêyÆ÷Çå¿Õ
   TIM_SetCounter(TIM5,0);                //¼ÆêyÆ÷Çå¿Õ
                     if(USART2_RX_STA==0)
                              //TIM_Cmd(TIM7, ENABLE);             //ê1Äü¶¨ê±Æ÷5
                     TIM_Cmd(TIM5, ENABLE);             //ê1Äü¶¨ê±Æ÷5
                     USART2_RX_BUF[USART2_RX_STA++]=res;             //¼ÇÂ¼½óêÕμ½μÄÖμ
            }else
            {
                     USART2_RX_STA|=1<<15;                                     //Ç¿ÖÆ±ê¼Ç½óêÕíê3é
            }
      }
}
}
#endif
//3õê¼»ˉIO ′®¿ú2
//bound:2¨ìØÂê

void usart2_init(u32 bound)
{

      NVIC_InitTypeDef NVIC_InitStructure;
      GPIO_InitTypeDef GPIO_InitStructure;
      USART_InitTypeDef USART_InitStructure;

      RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE);    //ê1ÄüGPIOAê±Öó
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);    //ê1ÄüUSART2ê±Öó  RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);

      USART_DeInit(USART2);                                  //¸′Î»′®¿ú2

      GPIO_PinAFConfig(GPIOA,GPIO_PinSource2,GPIO_AF_USART2);  //GPIOA2¸′óÃÎaUSART2
      GPIO_PinAFConfig(GPIOA,GPIO_PinSource3,GPIO_AF_USART2);  //GPIOA3¸′óÃÎaUSART2

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3; //GPIOA2oíGPIOA33õê¼»ˉ
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;             //¸′óÃ1|Äü
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;             //Ëù¶è50MHz
      GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;          //íÆíì¸′óÃêä3ö
      GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;             //éÏà-
      GPIO_Init(GPIOA,&GPIO_InitStructure);                   //3õê¼»ˉGPIOA2￡¬oíGPIOA3

      USART_InitStructure.USART_BaudRate = bound;                                  //2¨ìØÂê
      USART_InitStructure.USART_WordLength = USART_WordLength_8b;                   //×Ö3¤Îa8Î»êy¾Y¸ñê½
      USART_InitStructure.USART_StopBits = USART_StopBits_1;                      //ò»¸öí￡Ö1Î»
      USART_InitStructure.USART_Parity = USART_Parity_No;                         //ÎTÆæÅ¼D￡ÑéÎ»
      USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎTó2¼têy¾Yá÷¿ØÖÆ
      USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;                   //êÕ·￠Ä￡ê½

      USART_Init(USART2, &USART_InitStructure);                                     //3õê¼»ˉ′®¿ú2

      USART_Cmd(USART2, ENABLE);                                                    //ê1Äü′®¿ú

  USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);          //¿aÆôÖD¶Ï

      NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;//ÇàÕ¼óÅÏè¼¶2
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;             //×óóÅÏè¼¶3
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;                      //IRQí¨μàê1Äü
      NVIC_Init(&NVIC_InitStructure);                               //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷
      TIM5_Int_Init(100-1,8400-1);                                  //10msÖD¶Ï
      USART2_RX_STA=0;                                              //Çåáã
      TIM_Cmd(TIM5, DISABLE);                               //1Ø±Õ¶¨ê±Æ÷5
}

//′®¿ú2,printf oˉêy
//è·±￡ò»′Î·￠Ëíêy¾Y2»3¬1yUSART2_MAX_SEND_LEN×Ö½ú
void u2_printf(char* fmt,...)
{
      u16 i,j;
      va_list ap;
      va_start(ap,fmt);
      vsprintf((char*)USART2_TX_BUF,fmt,ap);
      va_end(ap);
      i=strlen((const char*)USART2_TX_BUF);                   //′Ë′Î·￠Ëíêy¾YμÄ3¤¶è
      for(j=0;j<i;j++)                                        //Ñ-»··￠Ëíêy¾Y
      {
      while(USART_GetFlagStatus(USART2,USART_FLAG_TC)==RESET);//μè′yéÏ′Î′«êäíê3é
            USART_SendData(USART2,(uint8_t)USART2_TX_BUF[j]);          //·￠Ëíêy¾Yμ½′®¿ú2
      }

}

这是串口3配制：
u16 USART3_RX_STA=0;
void USART3_IRQHandler(void)
{
u8 res;
if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)//½óêÕμ½êy¾Y
{

res =USART_ReceiveData(USART3);
if((USART3_RX_STA&(1<<15))==0)//½óêÕíêμÄò»Åúêy¾Y,»1Ã»óD±»′|àí,Ôò2»Ôù½óêÕÆäËûêy¾Y
{
if(USART3_RX_STA<USART3_MAX_RECV_LEN) //»1¿éòÔ½óêÕêy¾Y
{
TIM_SetCounter(TIM7,0);//¼ÆêyÆ÷Çå¿Õ
if(USART3_RX_STA==0)
TIM_Cmd(TIM7, ENABLE);  //ê1Äü¶¨ê±Æ÷7
USART3_RX_BUF[USART3_RX_STA++]=res; //¼ÇÂ¼½óêÕμ½μÄÖμ
}else
{
USART3_RX_STA|=1<<15; //Ç¿ÖÆ±ê¼Ç½óêÕíê3é
}
}
}
}
#endif
//3õê¼»ˉIO ′®¿ú3
//bound:2¨ìØÂê
void usart3_init(u32 bound)
{

NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB,ENABLE); //ê1ÄüGPIOBê±Öó
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);//ê1ÄüUSART3ê±Öó

USART_DeInit(USART3);  //¸′Î»′®¿ú3

GPIO_PinAFConfig(GPIOB,GPIO_PinSource11,GPIO_AF_USART3); //GPIOB11¸′óÃÎaUSART3
GPIO_PinAFConfig(GPIOB,GPIO_PinSource10,GPIO_AF_USART3); //GPIOB10¸′óÃÎaUSART3

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11 | GPIO_Pin_10; //GPIOB11oíGPIOB103õê¼»ˉ
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//¸′óÃ1|Äü
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //Ëù¶è50MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //íÆíì¸′óÃêä3ö
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //éÏà-
GPIO_Init(GPIOB,&GPIO_InitStructure); //3õê¼»ˉGPIOB11￡¬oíGPIOB10

USART_InitStructure.USART_BaudRate = bound;//2¨ìØÂê
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×Ö3¤Îa8Î»êy¾Y¸ñê½
USART_InitStructure.USART_StopBits = USART_StopBits_1;//ò»¸öí￡Ö1Î»
USART_InitStructure.USART_Parity = USART_Parity_No;//ÎTÆæÅ¼D￡ÑéÎ»
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//ÎTó2¼têy¾Yá÷¿ØÖÆ
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //êÕ·￠Ä￡ê½

USART_Init(USART3, &USART_InitStructure); //3õê¼»ˉ′®¿ú3

USART_Cmd(USART3, ENABLE);             //ê1Äü′®¿ú

  USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//¿aÆôÖD¶Ï

NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;//ÇàÕ¼óÅÏè¼¶2
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //×óóÅÏè¼¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μàê1Äü
NVIC_Init(&NVIC_InitStructure); //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷
TIM7_Int_Init(1000-1,8400-1); //100msÖD¶Ï
USART3_RX_STA=0; //Çåáã
TIM_Cmd(TIM7, DISABLE); //1Ø±Õ¶¨ê±Æ÷7


}

//′®¿ú3,printf oˉêy
//è·±￡ò»′Î·￠Ëíêy¾Y2»3¬1yUSART3_MAX_SEND_LEN×Ö½ú
void u3_printf(char* fmt,...)
{
u16 i,j;
va_list ap;
va_start(ap,fmt);
vsprintf((char*)USART3_TX_BUF,fmt,ap);
va_end(ap);
i=strlen((const char*)USART3_TX_BUF);//′Ë′Î·￠Ëíêy¾YμÄ3¤¶è
for(j=0;j<i;j++)//Ñ-»··￠Ëíêy¾Y
{
   while(USART_GetFlagStatus(USART3,USART_FLAG_TC)==RESET);  //μè′yéÏ′Î′«êäíê3é
USART_SendData(USART3,(uint8_t)USART3_TX_BUF[j]);    //·￠Ëíêy¾Yμ½′®¿ú3
}

以下是定时器7与定时器5的代码，原来两个模块接的都是定时器7，我把TIM7，直接变成TIM5，分开运行都正常。合并成一个工程后，发现调用函数，两个一起，只能运行一个模块。我注释任意一个函数，留下一个函数，都能正常运行。请哪位帮我指点指点，究竟哪儿出了问题？感谢！

extern vu16 USART3_RX_STA;    //¶¨ê±Æ÷7ÅäoÏ′®¿ú3¿ØÖÆGPS
//¶¨ê±Æ÷7ÖD¶Ï·tÎñ3ìDò
void TIM7_IRQHandler(void)
{
      if (TIM_GetITStatus(TIM7, TIM_IT_Update) != RESET)//êÇ¸üDÂÖD¶Ï
      {
            USART3_RX_STA|=1<<15;       //±ê¼Ç½óêÕíê3é
            TIM_ClearITPendingBit(TIM7, TIM_IT_Update  );  //Çå3yTIM7¸üDÂÖD¶Ï±êÖ¾
            TIM_Cmd(TIM7, DISABLE);  //1Ø±ÕTIM7
      }
}

void TIM7_Int_Init(u16 arr,u16 psc)
{
      NVIC_InitTypeDef NVIC_InitStructure;
      TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM7, ENABLE);//TIM7ê±Öóê1Äü

      //¶¨ê±Æ÷TIM73õê¼»ˉ
      TIM_TimeBaseStructure.TIM_Period = arr; //éèÖÃÔúÏÂò»¸ö¸üDÂêÂ¼t×°èë»î¶ˉμÄ×Ô¶ˉÖØ×°ÔØ¼Ä′æÆ÷ÖüÆúμÄÖμ
      TIM_TimeBaseStructure.TIM_Prescaler =psc; //éèÖÃóÃà′×÷ÎaTIMxê±ÖóÆμÂê3yêyμÄÔ¤·ÖÆμÖμ
      TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //éèÖÃê±Öó·Ö¸î:TDTS = Tck_tim
      TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //TIMÏòéÏ¼ÆêyÄ￡ê½
      TIM_TimeBaseInit(TIM7, &TIM_TimeBaseStructure); //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉTIMxμÄê±¼ä»ùêyμ￥Î»

      TIM_ITConfig(TIM7,TIM_IT_Update,ENABLE ); //ê1ÄüÖ¸¶¨μÄTIM7ÖD¶Ï,ÔêDí¸üDÂÖD¶Ï


      NVIC_InitStructure.NVIC_IRQChannel = TIM7_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0 ;//ÇàÕ¼óÅÏè¼¶0
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;             //×óóÅÏè¼¶1
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;                      //IRQí¨μàê1Äü
      NVIC_Init(&NVIC_InitStructure);       //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷

}

//////////////////////////////////////////////////////////////////////////////////

extern vu16 USART2_RX_STA; //       ¶¨ê±Æ÷5       ÅäoÏ′®¿ú2,¿ØÖÆGPRS

void TIM5_SetARR(u16 period)  //¶¨ê±Æ÷5
{
      TIM_SetCounter(TIM5,0);//¼ÆêyÆ÷Çå¿Õ
      TIM5->ARR&=0x00;    //ÏèÇåÔ¤×°ÔØÖüÆúÖμÎa0
      TIM5->ARR|= period; //¸üDÂÔ¤×°ÔØÖüÆúÖμ
}

//¶¨ê±Æ÷5ÖD¶Ï·tÎñ3ìDò
void TIM5_IRQHandler(void) //GPRS
{
      static u8 i=0;

      if(TIM_GetITStatus(TIM5, TIM_IT_Update) != RESET) //êÇ¸üDÂÖD¶Ï
      {
            TIM_ClearITPendingBit(TIM5, TIM_IT_Update  );  //Çå3yTIM5¸üDÂÖD¶Ï±êÖ¾
            if(Scan_Wtime!=0)//à¶Ñàé¨ÃèÄ￡ê½
            {
                     i++;
                     if(i==Scan_Wtime)
                     {
                              i=0;
                              Scan_Wtime = 0;
                              USART2_RX_STA|=1<<15;       //±ê¼Ç½óêÕíê3é
                              TIM_Cmd(TIM5, DISABLE);  //1Ø±Õ¶¨ê±Æ÷5
                              TIM5_SetARR(100-1);    //ÖØDÂéèÖÃÎa10msÖD¶Ï
                     }
            }
            else//·Çà¶Ñàé¨ÃèÄ￡ê½
      {
         USART2_RX_STA|=1<<15;          //±ê¼Ç½óêÕíê3é
                     TIM_Cmd(TIM5, DISABLE);    //1Ø±ÕTIM5

            }
      }
}

//í¨óÃ¶¨ê±Æ÷ÖD¶Ï3õê¼»ˉ
//Õaàïê¼ÖÕÑ¡ÔñÎaAPB1μÄ2±¶￡¬¶øAPB1Îa36M
//arr￡o×Ô¶ˉÖØ×°Öμ¡￡
//psc￡oê±ÖóÔ¤·ÖÆμêy
void TIM5_Int_Init(u16 arr,u16 psc)
{
      NVIC_InitTypeDef NVIC_InitStructure;
      TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;

      RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE);//TIM5ê±Öóê1Äü

      //¶¨ê±Æ÷TIM73õê¼»ˉ
      TIM_TimeBaseStructure.TIM_Period = arr;                   //éèÖÃÔúÏÂò»¸ö¸üDÂêÂ¼t×°èë»î¶ˉμÄ×Ô¶ˉÖØ×°ÔØ¼Ä′æÆ÷ÖüÆúμÄÖμ
      TIM_TimeBaseStructure.TIM_Prescaler =psc;                //éèÖÃóÃà′×÷ÎaTIMxê±ÖóÆμÂê3yêyμÄÔ¤·ÖÆμÖμ
      TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //éèÖÃê±Öó·Ö¸î:TDTS = Tck_tim
      TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;//TIMÏòéÏ¼ÆêyÄ￡ê½
      TIM_TimeBaseInit(TIM5, &TIM_TimeBaseStructure);          //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉTIMxμÄê±¼ä»ùêyμ￥Î»

      TIM_ITConfig(TIM5,TIM_IT_Update,ENABLE );                //ê1ÄüÖ¸¶¨μÄTIM5ÖD¶Ï,ÔêDí¸üDÂÖD¶Ï

      NVIC_InitStructure.NVIC_IRQChannel = TIM5_IRQn;
      //NVIC_InitStructure.NVIC_IRQChannel = TIM6_DAC_IRQn  ;
      //NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0 ; //ÇàÕ¼óÅÏè¼¶0
      //NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;                //×óóÅÏè¼¶1

            NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0 ; //ÇàÕ¼óÅÏè¼¶0
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;                //×óóÅÏè¼¶1
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;                         //IRQí¨μàê1Äü
      NVIC_Init(&NVIC_InitStructure);                                  //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷

}

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3条回答

challenger

2019-07-20 17:18

已经解决了，两个程序分开调用即可。这样两个定时器不是在同一时间内执行中断。

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