串口中断接收问题

music19960304 · 发表于 2017-3-2 21:31:22

[mw_shl_code=c,true]#include "led.h"
#include "delay.h"
#include "key.h"
#include "sys.h"
#include "lcd.h"
#include "usart.h"
#include "usart2.h"
#include "crc8_16.h"

int main(void)
{
extern u8 USART_TX_BUF[12];
extern u8 USART3_RX_BUF[12];
u8 i=0;
delay_init();            //Ñóê±oˉêy3õê¼»ˉ
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3);    //éèÖÃNVICÖD¶Ï·Ö×é2:2Î»ÇàÕ¼óÅÏè¼¶￡¬2Î»Ïìó|óÅÏè¼¶
uart_init(115200);      //′®¿ú3õê¼»ˉÎa115200
uart2_init(115200);
uart3_init(115200);
LED_Init();       //LED¶Ë¿ú3õê¼»ˉ
LCD_Init();
POINT_COLOR=RED;

    while(1)
{
   //if(flag==1)
      Put_String((u8*)(USART_TX_BUF+i));
   if(i>12)
   i=0;
   for(i=0;i<12;i++)
   {
   LCD_ShowString(30,10+20*i,200,16,16,&USART_TX_BUF);
   LCD_ShowString(100,10+20*i,200,16,16,&USART3_RX_BUF);
   }
   LED0=!LED0;
   delay_ms(250);



}
}
[/mw_shl_code]

[mw_shl_code=c,true]#include "sys.h"
#include "usart2.h"
//////////////////////////////////////////////////////////////////////////////////
char USART_TX_BUF[12]={"0123456789\r\n"}; //
char USART3_RX_BUF[12];
u8 Rx_Lenght;
u8 Rx_flg;
void uart2_init(u32 bound)
{
//GPIO????
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);
   //USART2_TX PA.2
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);

//USART1_RX    PA.3
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA, &GPIO_InitStructure);

//Usart1 NVIC ??

NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ????
NVIC_Init(&NVIC_InitStructure); //??NVIC_InitStruct???????????NVIC???USART1

//USART ?????

USART_InitStructure.USART_BaudRate = bound;//?????9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

USART_Init(USART2, &USART_InitStructure);

USART_ITConfig(USART2, USART_IT_TXE, ENABLE);//????

USART_Cmd(USART2, ENABLE);                   //????

}

void Put_String(u8 *p)
{

while(*p)
{
USART_SendData(USART2, *p++);
while(USART_GetFlagStatus(USART2, USART_FLAG_TXE)== RESET){  }
USART_ClearITPendingBit(USART2, USART_IT_TXE);
}

}
//?????????????
void Uart_PutChar(u8 ch)
{


  USART_SendData(USART2, (u8) ch);
  while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET){    }
  USART_ClearITPendingBit(USART2, USART_IT_TXE);

  //return ch;
}
void Uart_PutString(u8* buf,u8 len)
{
    u8 i;
for(i=0;i<len;i++)
   {
      Uart_PutChar(*buf++);
   }
}

void uart3_init(u32 bound)
{
   GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB|RCC_APB2Periph_AFIO, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
   //USART3_TX    PB.10

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOB, &GPIO_InitStructure);

//USART1_RX          PB11

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//Usart1 NVIC ??

NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;
NVIC_InitStructure.NVIC_IRQChannelSubPriority =1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ????
NVIC_Init(&NVIC_InitStructure); //??NVIC_InitStruct???????????NVIC???USART1

//USART ?????

USART_InitStructure.USART_BaudRate = bound;//?????9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

USART_Init(USART3, &USART_InitStructure);

USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);//??????3

USART_Cmd(USART3, ENABLE);                   //????3

}

/*void USART1_IRQHandler(void)             //??1??????
{
//u8 i=0;
if(USART_GetITStatus(USART1, USART_IT_TXE) != RESET)  //????(?????????0x0d 0x0a??)

{
   flag1=1;
   USART_ClearITPendingBit(USART1, USART_IT_TXE);
   //USART_SendData(USART1, USART_RX_BUF[i++]);
      }
else
{flag1=0;}
}*/
/*void USART3_IRQHandler(void)             //??3??????
{
//u8 i=0;
if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)  //????(?????????0x0d 0x0a??)

{
   flag3=1;
   USART_ClearITPendingBit(USART3,USART_IT_RXNE);
   //USART_RX_BUF[i++]=USART_ReceiveData(USART3);

}
else{flag3=0;}

}*/
void USART3_IRQHandler(void)
{  u8 tmp;
if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)

    {
    tmp=USART_ReceiveData(USART3);
if(tmp!='\0')
{
Rx_Lenght=0;
Rx_flg=1;
USART_ClearITPendingBit(USART3, USART_IT_RXNE);
}
else {
USART3_RX_BUF[Rx_Lenght]=tmp;
Rx_Lenght++;
   }
}

}

[/mw_shl_code]写了一个用串口2发个串口3的程序，用仿真可以看出数据已经成功发送，但中断接收不到任何数据，还望各位大神帮忙看一下，谢谢