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標題: 標準單片機串口通信程序 [打印本頁]

作者: huxiao 時間: 2015-1-24 16:11
標題: 標準單片機串口通信程序
#include <reg51.h>
#include <string.h>
#include <stdio.h>
#define STR_LEN 4
bit    sendFlag;
unsigned char checksum;
unsigned char count3;
unsigned char inBUF[STR_LEN];
/** Initlize IE TCON SCON function **/
void initCOM(void)
{
   SCON = 0x50;       //SCON: serail mode 1, 8-bit UART, enable ucvr
   TMOD = 0x20;       //TMOD: timer 1, mode 2, 8-bit reload
   PCON = 0x80;       //SMOD=1;
   TH1 = 0xF4;       //Baud:4800 fosc=11.0592MHz
   IE = 0x90;       //interrupt enable
   TR1 = 1;          //Run
}
/** Send a char to MC             **/
void sendChar(unsigned char ch)
{
   SBUF = ch;
   while(TI == 0);
   TI = 0;
}
/** Send a String to MC          **/
void sendString(unsigned char *str, char length)
{
   char strlen = 0;
   while(strlen < length)
   {
      sendChar( *(str+strlen) );
      strlen ++;
   }
}
/** COM receive message interrupt function**/
void inteReceive (void) interrupt 4 using 1
{
   if(RI == 1)
   {
unsigned char chr;
         RI = 0;
         chr=SBUF;
         if(chr>127)
         {
               count3=0;
               inBUF[count3]=chr;
               checksum= chr-128;
         }
         else
         {    count3++;
               inBUF[count3]=chr;
               checksum ^= chr;
               if( (count3 == (STR_LEN-1) ) && ( !checksum ) )
               {
                  sendFlag = 1;
               }
         }
}
}
int main(void)
{
   initCOM();
   if (sendFlag == 1) //sendFlag want to send message to MC
   {
      sendString(inBUF,STR_LEN);
      sendFlag = 0;
   }
}

作者: 小泡泡 時間: 2015-1-27 11:03
哈哈哈

作者: caoovao 時間: 2015-5-8 12:13
有用哦

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