8-way infrared remote control switch controller (expandable to 32-way)

MCU HEX file download: 04032801_1_8COM.rar

C51 source code:

/*----------------------------------------

8-way infrared remote control switch controller
(SAA3010T TV remote control)

Copyright 2004/3/27
http://www.cdle.net
http://bbs.cdle.net

All rights reserved.Minghao

E-mail: pnzwzw@163.com
pnzwzw@cdle.net

When only eight channels are used, AT89C2051 can be used instead of AT89C51.
The integrated receiver output terminal pulls P3.2 (int0), and P1 is the control output terminal.
It can be expanded to 32 channels or more .
The output is low level valid
----------------------------------------*/

#include

static unsigned char data IRCode[3],IRCON,IRCON2;
static unsigned char data DT;

void main(void)
{
unsigned int de;

TMOD =0x01; //Timer 0 mode 1
EA =1; //Allow CPU interrupt
IT0 =1; //INT0 falling edge is valid
EX0 =1; //Open INT0 interrupt;
do
{
for (de=0; de<10000; de++)
P3_6 =1;
for (de=0; de<10000; de++)
P3_6 =0;
if (DT)
{
for (de=0; de<30000; de++) //There will be a delay after the key value is correct to prevent repeated key presses
P3_6 =1;
for (de=0; de<30000; de++)
P3_6 =0;
DT =0;
}
EX0 =1;
}
while(1);
}

//Timer 0 interrupt processing
void timeint(void) interrupt 1 using 2
{
TH0=0xFD;
TL0=0x1E; //Set the time value to 800us

if (IRCON<3)
{
if (IRCON2<8) //Read the status of the remote control receiver once per interrupt, and each second time is a bit in the remote control code
{
IRCON2++;
IRCode[IRCON]=IRCode[IRCON]<<1; //Read a binary bit in the variable each time, and shift it left one bit each
timeIRCode[IRCON]=IRCode[IRCON] | P3_2; //Fill up a byte every eight times, and one byte stores 4 bits of remote control code
}
else
{
IRCON++; //Fill up a byte and point to the next variableIRCON2
=0; //Count cleared
}
}
else
{
TR0 =0; //Turn off timerET0
=0; //Timer 0 interrupt turned
offif ((IRCode[1]!=0xFF) && (IRCode[2]!=0xFF))
{
if (IRCode[1] ==0x55)
{
switch (IRCode[2])
{
case 0xAB: //1-8 key controlP1_0
=~P1_0;
DT =1;
break;
case 0xAC:
P1_1 =~P1_1;
DT =1;
break;
case 0xAD:
P1_2 =~P1_2;
DT =1;
break;
case 0xB2:
P1_3 =~P1_3;
DT =1;
break;
case 0xB3:
P1_4 =~P1_4;
DT =1; break
; case
0xB4:
P1_5 =~P1_5 ; DT =1; break; case 0xB5: P1_6 =~P1_6; DT =1; break; case 0xCA : P1_7 =~P1_7; DT =1; break; case 0xD2: //Press the power off button to turn off all relays P1 =0xFF; DT =1; break; } } } } }

//INT0 interrupt
void INT0Fun(void) interrupt 0 using 2
{
EX0 =0; //External interrupt 0 disabled
ET0 =1; //Timer 0 interrupt enabled
TH0=0xFD;
TL0=0x1E; //Set the time value to 800us

for (IRCON=0; IRCON<3; IRCON++)
IRCode[IRCON] =0;
IRCON =0;
IRCON2 =0; //Count clear

TR0 =1; //Start counting