关于串口同时收发的问题

2019-08-14 07:45发布

我在用STM32F1做一个串口通讯的程序，串口接触摸屏，利用触摸屏上的按钮发送控制信号给32，而32发送给触摸屏的信号是(利用超声波测量的距离值).触摸屏能一直更新距离，但是触摸屏控制32的信号只能控制一次。请问如何解决？(要是我把32发送给触摸屏的程序//掉的好，控制信号能一直传输)
//
#include <stdio.h>
#include "stm32f10x.h"
#include "led.h"
#include "delay.h"
#include "key.h"
#include "beep.h"
#include "nrf24l01.h"
#include "beep.h"
#include "USART.h"
#include "time.h"

extern u8  TIM4CH4_CAPTURE_STA; //êäèë2¶»ñ×′ì¬
extern u16 TIM4CH4_CAPTURE_VAL; //êäèë2¶»ñÖμ

extern void My_NRF(void);
extern void My_TJC(void);
extern void My_HC(void);

u16 t;
u16 len;
u8 tem_TJC[16];
u8 tmp_buf[33];
u32 temp=0;
u32 jl;

int main(void)
{
LED_Init();//LED3õê¼»ˉ
BEEP_Init();//·äÃùÆ÷3õê¼»ˉ
  KEY_Init();//°′¼ü3õê¼»ˉ
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); //éèÖÃNVICÖD¶Ï·Ö×é2:2Î»ÇàÕ¼óÅÏè¼¶￡¬2Î»Ïìó|óÅÏè¼¶
uart_init(9600);    //′®¿ú3õê¼»ˉÎa9600
delay_init();
  NRF24L01_Init(); //3õê¼»ˉNRF24L01

TIM4_Cap_Init(0XFFFF,72-1); //òÔ1MhzμÄÆμÂê¼Æ

while(NRF24L01_Check()) //¼ì2éNRF24L01êÇ·ñÔúÎ».
{
// LED0=0;
// delay_ms(1000);
// LED0=1;
delay_ms(1000);
}
NRF24L01_RX_Mode();    //RXÄ￡ê½
while(1)
{
My_NRF();
My_TJC();
My_HC();
delay_ms(20);
}
}
void My_TJC()
{
if(USART_RX_STA&0x8000)
{
len=USART_RX_STA&0x3fff;//μÃμ½′Ë′Î½óêÕμ½μÄêy¾Y3¤¶è
for(t=0;t<len;t++)
{
tem_TJC[t]=USART_RX_BUF[t];
USART_SendData(USART1, USART_RX_BUF[t]);//Ïò′®¿ú1·￠Ëíêy¾Y
while(USART_GetFlagStatus(USART1,USART_FLAG_TC)!=SET);//μè′y·￠Ëí½áê
}
switch(tem_TJC[0])
{
case 'A'

ED0=0;break;
case 'B'

ED0=1;break;
case 'C'

ED1=0;break;
case 'D'

ED1=1;break;
case 'E':BEEP=0;break;
case 'F':BEEP=1;break;
case 'G':BEEP=0;break;
case 'H':BEEP=1;break;
}
USART_RX_STA=0;
delay_ms(10);
}
// else
// {
// My_HC();
// }
}

void My_NRF()
{
if(NRF24L01_RxPacket(tmp_buf)==0)//ò»μ©½óêÕμ½DÅÏ￠,ÔòÏÔê¾3öà′.
{
switch(tmp_buf[1])
{
case '1'

ED0=~LED0;break;
case '2'

ED1=~LED1;break;
case '3':{LED1=~LED1;LED0=~LED0;}break;
case '0':BEEP=~BEEP;break;
case '4'

ED0=~LED0;break;
case '5'

ED1=~LED1;break;
case '6':{LED1=~LED1;LED0=~LED0;}break;
case '7':BEEP=~BEEP;break;
}
tmp_buf[32]=0;//¼óèë×Ö·û′®½áêø·û
}else delay_us(100);
}

void My_HC(void)
{
   tri=1;
   delay_us(20);
   tri=0;
   delay_us(20);
if(TIM4CH4_CAPTURE_STA&0X80)//3é1|2¶»ñμ½áËò»′ÎéÏéyÑØ
{
temp=TIM4CH4_CAPTURE_STA&0X3F;
temp*=65536;//òç3öê±¼ä×üoí
temp+=TIM4CH4_CAPTURE_VAL;//μÃμ½×üμÄ¸ßμçÆ½ê±¼
jl=temp*170/10000;
printf("t3.txt="%d"",jl);
stop();
TIM4CH4_CAPTURE_STA=0;//¿aÆôÏÂò»′Î2¶»ñ
delay_ms(10);
}

}

//usart程序
void uart_init(u32 bound){
  //GPIO¶Ë¿úéèÖÃ
  GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE); //ê1ÄüUSART1￡¬GPIOAê±Öó

//USART1_TX GPIOA.9
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //¸′óÃíÆíìêä3ö
  GPIO_Init(GPIOA, &GPIO_InitStructure);//3õê¼»ˉGPIOA.9

  //USART1_RX    GPIOA.103õê¼»ˉ
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//¸¡¿Õêäèë
  GPIO_Init(GPIOA, &GPIO_InitStructure);//3õê¼»ˉGPIOA.10

  //Usart1 NVIC ÅäÖÃ
  NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;//ÇàÕ¼óÅÏè¼¶3
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; //×óóÅÏè¼¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μàê1Äü
NVIC_Init(&NVIC_InitStructure); //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷

//USART 3õê¼»ˉéèÖÃ

USART_InitStructure.USART_BaudRate = bound;//′®¿ú2¨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(USART1, &USART_InitStructure); //3õê¼»ˉ′®¿ú1
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//¿aÆô′®¿ú½óêüÖD¶Ï
  USART_Cmd(USART1, ENABLE);                   //ê1Äü′®¿ú1

}

void stop(void)          //×Ö½ú·￠Ëíoˉêy
{
   u8 i;
   printf("9");
   for(i=0;i<3;i++)
   {
USART_SendData(USART1,0xff);  //·￠Ëíò»¸ö×Ö½ú
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)!=SET);//μè′y·￠Ëí½áêø
   }
}

void USART1_IRQHandler(void)             //′®¿ú1ÖD¶Ï·tÎñ3ìDò
{
u8 Res;
#if SYSTEM_SUPPORT_OS //èç1ûSYSTEM_SUPPORT_OSÎaÕæ￡¬ÔòDèòaÖ§3ÖOS.
OSIntEnter();
#endif
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)  //½óêÕÖD¶Ï(½óêÕμ½μÄêy¾Y±ØDëêÇ0x0d 0x0a½áÎ2)
{
Res =USART_ReceiveData(USART1); //¶áè¡½óêÕμ½μÄêy¾Y

if((USART_RX_STA&0x8000)==0)//½óêÕÎ′íê3é
{
if(USART_RX_STA&0x4000)//½óêÕμ½áË0x0d
{
if(Res!=0x0a)USART_RX_STA=0;//½óêÕ′íÎó,ÖØDÂ¿aê¼
else {USART_RX_STA|=0x8000;}//½óêÕíê3éáË
}
else //»1Ã»êÕμ½0X0D
{
if(Res==0x0d)USART_RX_STA|=0x4000;
else
{
USART_RX_BUF[USART_RX_STA&0X3FFF]=Res ;
USART_RX_STA++;
if(USART_RX_STA>(USART_REC_LEN-1))USART_RX_STA=0;//½óêÕêy¾Y′íÎó,ÖØDÂ¿aê¼½óêÕ
}
}
}
   }
#if SYSTEM_SUPPORT_OS //èç1ûSYSTEM_SUPPORT_OSÎaÕæ￡¬ÔòDèòaÖ§3ÖOS.
OSIntExit();
#endif
}
#endif

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