单片机初步测试

#include

#include

#ifdef MONITOR51
char code reserve [3] _at_ 0x23;
#endif

void delay(unsigned char i){
while(--i);
}

void main (void) {

#ifndef MONITOR51
SCON= 0x50;
TMOD |= 0x20;
TH1= 221;
TR1= 1;
TI= 1;
#endif

while (1) {
//P1 ^= 0x01;
delay(50);
delay(50);
delay(50);
//printf ("Hello World mm...");
}
}