;********************************************************************************
;* 描述: *
;* 遙控鍵值讀取器 *
;* 數碼管顯示, P0口為數碼管的數據口 *
;* *
;********************************************************************************
;遙控鍵值解碼-數碼管顯示 *
;********************************************************************************/
#include <reg51.h>
#include <intrins.h>
void IR_SHOW();
void delay(unsigned char x);//x*0.14MS
void delay1(unsigned char ms);
void beep();
sbit IRIN = P3^2;
sbit BEEP = P3^7;
sbit RELAY= P1^3;
sbit GEWEI= P2^7;
sbit SHIWEI= P2^6;
unsigned char IRCOM[8];
unsigned char code table[16] =
{0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
main()
{
IE = 0x81; //允許總中斷中斷,使能 INT0 外部中斷
TCON = 0x1; //觸發方式為脈沖負邊沿觸發
delay(1);
IRIN=1;
BEEP=1;
RELAY=1;
for(;;)
{
IR_SHOW();
}
} //end main
void IR_IN() interrupt 0 using 0
{
unsigned char i,j,k,N=0;
EA = 0;
I1:
for (i=0;i<4;i++)
{
if (IRIN==0) break;
if (i==3) {EA =1;return;}
}
delay(20);
if (IRIN==1) goto I1; //確認IR信號出現
while (!IRIN) //等 IR 變為高電平
{delay(1);}
for (j=0;j<4;j++)
{
for (k=0;k<8;k++)
{
while (IRIN) //等 IR 變為低電平
{delay(1);}
while (!IRIN) //等 IR 變為高電平
{delay(1);}
while (IRIN) //計算IR高電平時長
{
delay(1);
N++;
if (N>=30) {EA=1;return;}
}
IRCOM[j]=IRCOM[j] >> 1;
if (N>=8) {IRCOM[j] = IRCOM[j] | 0x80;}
N=0;
}//end for k
}//end for j
if (IRCOM[2]!=~IRCOM[3]) {EA=1;return;}
IRCOM[5]=IRCOM[2] & 0x0F;
IRCOM[6]=IRCOM[2] & 0xF0;
IRCOM[6]=IRCOM[6] >> 4;
beep();
EA = 1;
}
void IR_SHOW()
{
P0 = table[IRCOM[5]];
GEWEI = 0;
SHIWEI = 1;
delay1(4);
P0 = table[IRCOM[6]];
SHIWEI = 0;
GEWEI = 1;
delay1(4);
}
void beep()
{
unsigned char i;
for (i=0;i<100;i++)
{
delay(5);
BEEP=!BEEP;
}
BEEP=1;
}
void delay(unsigned char x)//x*0.14MS
{
unsigned char i;
while(x--)
{
for (i = 0; i<13; i++) {}
}
}
void delay1(unsigned char ms)
{
unsigned char i;
while(ms--)
{
for(i = 0; i<120; i++)
{
_nop_();
_nop_();
_nop_();
_nop_();
}
}
}