#include <AT89X52.h>
unsigned char code SEGtable[]=
{
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0x00
};
sbit sw7 = P0 ^ 7;
sbit sw6 = P0 ^ 6;
sbit sw5 = P0 ^ 5;
sbit sw4 = P0 ^ 4;
sbit sw3 = P0 ^ 3;
sbit sw2 = P0 ^ 2;
sbit sw1 = P0 ^ 1;
sbit sw0 = P0 ^ 0;
sbit FMQ = P1 ^ 7;
bit alarmflg = 0;
unsigned RxByte = 0x00;
unsigned char counter = 0;
unsigned char Scounter,Lcounter; //·Ö±ð´æ·Å×Ô¼ºµÄˮλ״̬ºÍÔ¶·½µÄˮλ״̬
unsigned char FMcounter = 0x02; //±¨¾¯×´Ì¬²ÎÊý
void DelayFM(unsigned int x)
{
unsigned char t;
while(x--)
{
for(t=0;t<120;t++);
}
}
//·äÃùÆ÷Çý¶¯º¯Êý£¬²ÎÊýΪ·¢ÉùÉùµ÷
void FM(unsigned char x)
{
unsigned char i;
for(i=0;i<100;i++)
{
FMQ = ~FMQ;
DelayFM(x);
}
FMQ = 0;
}
void Delayms(unsigned int MS)
{
unsigned int i,j;
for( i=0;i<MS;i++)
for(j=0;j<1141;j++);
}
void InitUART(void)
{
TMOD = 0x20; //9600bps
SCON = 0x50;
TH1 = 0xFD;
TL1 = TH1;
PCON = 0x00;
EA = 1;
ES = 1;
TR1 = 1;
}
void Send(unsigned char x)
{
SBUF = x;
while(TI == 0);
TI = 0;
}
void Serial(void) interrupt 4 using 1
{
unsigned char RxByte;
if(RI == 1)
{
RxByte = SBUF;
RI = 0;
P2 = RxByte;
switch(RxByte)
{
case 0x00: Lcounter = 0;break;
case 0xf9: Lcounter = 1;break;
case 0xa4: Lcounter = 2;break;
case 0xb0: Lcounter = 3;break;
case 0x99: Lcounter = 4;break;
case 0x92: Lcounter = 5;break;
case 0x82: Lcounter = 6;break;
case 0xF8: Lcounter = 7;break;
case 0x80: Lcounter = 8;break;
default:{};
}
if(Scounter > Lcounter)
{
if((Scounter - Lcounter) > 2)
{
FMcounter = Scounter - Lcounter;
alarmflg = 1;
}
else
{
alarmflg = 0;
}
}
else
{
alarmflg = 0;
}
}
}
int main(void)
{
InitUART();
while(1)
{
Delayms(100);
P0 = 0xFF;
counter = 0;
counter = counter + (unsigned char)sw7;
counter = counter + (unsigned char)sw6;
counter = counter + (unsigned char)sw5;
counter = counter + (unsigned char)sw4;
counter = counter + (unsigned char)sw3;
counter = counter + (unsigned char)sw2;
counter = counter + (unsigned char)sw1;
counter = counter + (unsigned char)sw0;
Scounter = counter;
Send(SEGtable[counter]);
if(alarmflg == 1)
{
FM(FMcounter);
}
}
}
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