两定时器秒脉冲.c

这是本人在学习51单片机时练习的C程序 [e-mail]

#include <reg51.h>
#define uchar unsigned char
#define uint unsigned int
#define ulong unsigned long


sbit P30=P2^0;
sbit P37=P2^7;

timer1() interrupt 1 using 1// T0,200mS的秒脉冲中断程序
{
P30=!P30;//100MS到取反
TH0=(65530-50000)/256;//200MS[初值,这种格式是以十进制表示十六进制
TL0=(65530-50000)%256;

}

timer2() interrupt 3 using 2
{
P37=!P37;
}


main()
{
P37=0;
P30=1;

TMOD=0x61;
TH0=(65530-50000)/256;
TL0=(65530-50000)%256;

TH1=256-20;
TL1=256-20;

IP=0x08;
EA=1;
ET0=1;
ET1=1;
TR0=1;
TR1=1;
for(;;)
  {
  }
}