serial_port.c

(AD9958用ADuC845控制的keil源代码包,键盘和显示部分在另一个板上

/*
  serial_port.c file
*/
#include "aduc841.h"
#include "serial_port.h"
#include "isr.h"

//*****************************************************************************************
void init_comport(void)  //串口初始化函数，使用24M晶体,9600
{
 EA=0;
 TMOD=0x21;    //定时器0工作在模式1，定时器1工作在模式2
 SCON=0x50;    //串口工作在模式1
 TCON=0x05;
 PCON=0x80;    //串口波特率加倍
 TH1=0x7E;    
 TL1=0x7E; 
 ES=1;         //串行中断允许
 TR1=1;        //启动定时器1
 REN=1;        //允许接收 
 EA=1;         //允许中断
}
//*****************************************************************************************

//*****************************************************************************************
void printc(unsigned char temp)       //往串口发送一字节数据
{
 sending=1;
 SBUF=temp;
 while(sending);
}
//*****************************************************************************************


/*void prints(unsigned char * temp,unsigned char line_feed)
{
 while((*temp)!='\0')
  {
   send_to_comport(*temp);
   temp++;
  }
 if(line_feed)
 {
  send_to_comport(13);
  send_to_comport(10);
 }
}
*/


/*void printf(unsigned long int x)
{
 signed char i;
 unsigned char display_buffer[10];
 display_buffer[10]=0;
 for(i=9;i>=0;i--)
  {
   display_buffer[i]='0'+x%10;
   x/=10;
  }
 for(i=0;i<9;i++)
  {
   if(display_buffer[i]!='0')break;
  }
 for(;i<10;i++)printc(display_buffer[i]);
}*/


/*
void printc(unsigned char temp)
{
 unsigned char i,j;
 i=temp;
 for(j=0;j<2;j++)
  {
   if(!j)i>>=4;
   else i=temp&0x0F;
   switch(i)
    {
     case 0:
     case 1:
     case 2:
	 case 3:
     case 4:
     case 5:
     case 6:
     case 7:
     case 8:
     case 9:  send_to_comport(i+'0');break;
     case 10: send_to_comport('A');break;
     case 11: send_to_comport('B');break;
     case 12: send_to_comport('C');break;
     case 13: send_to_comport('D');break;
     case 14: send_to_comport('E');break; 
     case 15: send_to_comport('F');break;
     default: break;
    }
  }
 send_to_comport(' ');
}
*/