#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit Key = P1^7;
sbit DoorBell = P3^0;
uint p = 0;
void Timer0() interrupt 1
{
DoorBell = ~DoorBell;
p++;
if(p<400)
{
TH0 = (8192-700)/32;
TL0 = (8192-700)%32;
}
else if(p<800)
{
TH0 = (8192-1000)/32;
TL0 = (8192-1000)%32;
}
else
{
TR0 = 0;
P = 0;
}
}
void main()
{
IE = 0x82;
TMOD = 0x00;
TH0 = (8192-700)/32;
TL0 = (8192-700)%32;
while(1)
{
if(Key == 0)
{
TR0 = 1;
while(Key==0);
}
}
}
单片机仿真 用定时器设计的门铃.rar （15个子文件） 
用定时器设计的门铃 
用定时器设计的门铃.PWI 910B Last Loaded 用定时器设计的门铃.DBK 64KB Keil C 用定时器设计的门铃.hex 732B 用定时器设计的门铃 2KB 用定时器设计的门铃.DSN 64KB code menling.OBJ 2KB menling 2KB menling.LST 2KB menling.M51 4KB menling.c 554B menling.Opt 1KB menling.plg 500B menling_Uv2.Bak 0B menling.lnp 46B menling.Uv2 2KB资源评论
