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//#include<var.h>
#include<stc89.h>
#include<absacc.h>
unsigned char bdata a8010;
sbit BEEP = a8010^4;
unsigned char TCNT;
void T0init(void)
{
TMOD = 0x01;
// 12/11.0592 == 1.085069us
// 50000/1.085069 == 46080
TH0=(65536-46080)/256;
TL0=(65536-46080)%256;
EA = ET0 = TR0 = 1; //启动定时器
//灭LED灯，停转风扇
XBYTE[0x8007] = 0x10 + 0x20;
}
void main(void)
{
TCNT=0;
T0init();
while(1)
{
}
}
void T0ISR(void) interrupt 1
{
TH0=(65536-46080)/256;
TL0=(65536-46080)%256;
TCNT++;
if(TCNT==20)
{
TCNT=0;
BEEP = !BEEP;
XBYTE[0x8010] = a8010; //送出讯响信号
}
}
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