sieries_comm.c

一种染色机的数字输入输出模块（PM32）,其中含有tip2603和74hc589的c语言驱动程序

#include <reg51.h>
#include <intrins.h>

unsigned char inbuf1[4]; //通讯处理
unsigned char commdata_tmp[2];
unsigned char checksum,count3;
sbit          TX=P3^2;


void init_serialcomm(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   = 0xFA;       //Baud:9600  fosc=11.0592MHz 
    IE   |= 0x90;       //Enable Serial Interrupt 
    TR1   = 1;          // timer 1 run 
   // TI=1; 
   TX=0;
}

//向串口发送一个字符 
void send_char_com(unsigned char ch)  
{
    SBUF=ch;
    while(TI==0);
    TI=0;
}

//向串口发送一个字符串，strlen为该字符串长度 
void send_string_com(unsigned char *str,unsigned int strlen)
{
    unsigned int k=0;
   TX=1;
    do 
    {
        send_char_com(*(str + k));
        k++;
    } while(k < strlen);
   TX=0;
}


//串口接收中断函数 
void serial () interrupt 4 using 3 
{
    if(RI)
    {
        char ch;
        RI = 0;
        ch=SBUF;

         inbuf1[count3]=ch;
      
             count3++;
            
             //checksum ^= ch;
             if(( count3==3 )&&(inbuf1[0]==0x68))               //            (!checksum)
           {
                commdata_tmp[0]=inbuf1[1];  //如果串口接收的数据达到INBUF_LEN个，且校验没错， 
                commdata_tmp[1]=inbuf1[2];               //就置位取数标志 
				count3=0;
            }
			 if( count3>=3 )
			 {
			 count3=0;
			 }
        
    }
}
void comm_data(unsigned char commdata[2])
{
  commdata[0]=commdata_tmp[0];   
  commdata[1]=commdata_tmp[1]; 
  }