單片機串口通信子程序

#include
#define uchar unsigned char
#define uint unsigned int
uchar ge;
sbit bin=P3^7;
uchar flag;

void init_com()
{
TMOD=0x20; //T1工作方式2
PCON=0x00; //波特率不倍增
SCON=0x50; //串口工作方式1
TH1=0xfd; //給定時(shí)器1賦初值
TL1=0xfd;
TR1=1; //啟動(dòng)定時(shí)器1
TI=1;
}

void main()
{
init_com();
printf("ATD15873590872;");
while(1);
}