com.c

max232通讯驱动源程序

#include <my.h>
 //unsigned char temp;
 
void serial_init()
{/*串口初始化    */
 serial_baud_9600;
 serial_uart_8; /*工作方式为8位数据   */
 serial_receive_enable;/*允许接收*/
 //ti=1;

}

 void interrupt_init(void)
   {
     //timer2_interrupt_disable;
     timer0_interrupt_disable;
     timer1_interrupt_disable;
     int0_interrupt_disable;
     int1_interrupt_disable;
     serial_priority_high;
     serial_interrupt_enable;
     //int0_mode_hightolow;
     //int0_priority_high;
   }
   
   void send_char(uchar temp)
 /*往串口发送一个字符  */
{
 ea=0;
 sbuf=temp;
  ti=1;
 ea=1;
}

 void main(void)
{ uchar temp;
 sp=0x60;
ea=1;
serial_init();
interrupt_init();
temp=0xaa;
send_char(temp);
while(1)
{
}

}

void serial(void) interrupt 4
{ 
uchar temp;

if(ri){                ri=0;
                        temp=sbuf;
                        send_char(temp);                      
                           }
if(ti) {               
                    while(!ti);
                     ti=0; 
                    
          }
       }