"STC89C52 learning remote controller can store eight infrared remote control information. It can be used in commercial production as long as the key is interrupted by 2 with a timer.
RXIN BIT P2.0
TXZAI BIT P2.2
TXOUT BIT P2.1
KEY_ SIGN BIT 20H ; The key for 0 is wrong, and the key for 1 is correct
RXTX_ SIGN BIT 21H ; 0 is the transmitting state and 1 is the receiving state
ISP_ DATA DATA 0E2H ; ISP function register definition
ISP_ ADDRH DATA 0E3H
ISP_ ADDRL DATA 0E4H
ISP_ CMD DATA 0E5H
ISP_ TRIG DATA 0E6H
ISP_ CONTR DATA 0E7H
ISP_ CMD_ NO EQU 0 ; Operand
ISP_ CMD_ READ EQU 1
ISP_ CMD_ PROGRAM EQU 2
ISP_ CMD_ ERASE EQU 3
WAIT_ TIME EQU 1 ; waiting time
ZHIL EQU 30H
ZHIH EQU 31H
GESHU EQU 32H
JISHU EQU 33H
KEY_ WORD EQU 34H
KEY_ VALUE EQU 35H
ADDRH EQU 36H
ADDRL EQU 37H
TX_ GESHU EQU 38H
ORG 0000H
LJMP START
ORG 000BH
LJMP T0IN
ORG 001BH
LJMP T1IN
ORG 0100H
START： MOV SP，#10H
CLR RXTX_ SIGN
LJMP KEY_ MAIN
KEY_ MAIN:LCALL SCAN_ KEY ; Check whether a single key is pressed
MOV A，KEY_ WORD
CJNE A，#00H，NEXT1
LJMP KEY_ MAIN
NEXT1： JNB KEY_ SIGN，KEY_ MAIN
MOV KEY_ VALUE，A
LCALL RE_ DELAY ; Buffeting time 20ms
LCALL SCAN_ KEY ; Is it still pressed
MOV A，KEY_ WORD
CJNE A，#00H，NEXT2
LJMP KEY_ MAIN
NEXT2： JNB KEY_ SIGN，KEY_ MAIN
CJNE A，KEY_ VALUE，KEY_ MAIN
RELEASE： LCALL SCAN_ KEY ; Check whether the key is released
MOV A，KEY_ WORD
CJNE A，#00H，RELEASE
MOV DPTR，#TAB ; Execute the corresponding program
CLR C
MOV A，KEY_ VALUE
ADD A，KEY_ VALUE
JMP @A+DPTR
TAB： AJMP KEY_ 0
AJMP KEY_ one
AJMP KEY_ two
AJMP KEY_ three
AJMP KEY_ four
AJMP KEY_ five
AJMP KEY_ six
AJMP KEY_ seven
AJMP KEY_ eight
AJMP KEY_ nine
AJMP KEY_ ten
AJMP KEY_ eleven
AJMP KEY_ twelve
AJMP KEY_ thirteen
AJMP KEY_ fourteen
AJMP KEY_ fifteen
AJMP KEY_ sixteen
KEY_ 0： LJMP KEY_ MAIN ; Invalid by key value
KEY_ 1： JNB RXTX_ SIGN，T1RX ; Receiving and sending key setting key, P1 light is on for receiving and storage status, and the light is off for transmitting status
T1TX： CLR RXTX_ SIGN
MOV P1，#0FFH
LJMP KEY_ MAIN
T1RX： SETB RXTX_ SIGN
MOV P1，#00H
LJMP KEY_ MAIN
KEY_ 2： MOV ADDRH，#20H
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY2_ RX
KEY2_ TX:LJMP TX_ START
KEY2_ RX:LJMP RX_ START
KEY_ 3： MOV ADDRH，#22H
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY3_ RX
KEY3_ TX:LJMP TX_ START
KEY3_ RX:LJMP RX_ START
KEY_ 4： MOV ADDRH，#24H
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY4_ RX
KEY4_ TX:LJMP TX_ START
KEY4_ RX:LJMP RX_ START
KEY_ 5： MOV ADDRH，#26H
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY5_ RX
KEY5_ TX:LJMP TX_ START
KEY5_ RX:LJMP RX_ START
KEY_ 6： MOV ADDRH，#28H
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY6_ RX
KEY6_ TX:LJMP TX_ START
KEY6_ RX:LJMP RX_ START
KEY_ 7： MOV ADDRH，#2AH
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY7_ RX
KEY7_ TX:LJMP TX_ START
KEY7_ RX:LJMP RX_ START
KEY_ 8： MOV ADDRH，#2CH
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY8_ RX
KEY8_ TX:LJMP TX_ START
KEY8_ RX:LJMP RX_ START
KEY_ 9： MOV ADDRH，#2EH
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY9_ RX
KEY9_ TX:LJMP TX_ START
KEY9_ RX:LJMP RX_ START
KEY_ 10： MOV ADDRH，#2EH
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY10_ RX
KEY10_ TX:LJMP TX_ START
KEY10_ RX:LJMP RX_ START
KEY_ 11： MOV ADDRH，#2EH
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY11_ RX
KEY11_ TX:LJMP TX_ START
KEY11_ RX:LJMP RX_ START
KEY_ 12： MOV ADDRH，#2EH
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY12_ RX
KEY12_ TX:LJMP TX_ START
KEY12_ RX:LJMP RX_ START
KEY_ 13： MOV ADDRH，#2EH
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY13_ RX
KEY13_ TX:LJMP TX_ START
KEY13_ RX:LJMP RX_ START
KEY_ 14： MOV ADDRH，#2EH
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY14_ RX
KEY14_ TX:LJMP TX_ START
KEY14_ RX:LJMP RX_ START
KEY_ 15： MOV ADDRH，#2EH
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY15_ RX
KEY15_ TX:LJMP TX_ START
KEY15_ RX:LJMP RX_ START
KEY_ 16： MOV ADDRH，#2EH
MOV ADDRL，#00H
JB RXTX_ SIGN，KEY16_ RX
KEY16_ TX:LJMP TX_ START
KEY16_ RX:LJMP RX_ START
SCAN_ KEY:CLR KEY_ SIGN
MOV KEY_ WORD，#00H
KEY1： MOV P3，#11111110B ; first line
JB P3.4，KEY2
JB KEY_ SIGN，KEYWRONG1
MOV KEY_ WORD，#1
SETB KEY_ SIGN
KEY2： JB P3.5，KEY3
JB KEY_ SIGN，KEYWRONG1
MOV KEY_ WORD，#2
SETB KEY_ SIGN
KEY3： JB P3.6，KEY4
JB KEY_ SIGN，KEYWRONG1
MOV KEY_ WORD，#3
SETB KEY_ SIGN
KEY4： JB P3.7，KEY5
JB KEY_ SIGN，KEYWRONG1
MOV KEY_ WORD，#4
SETB KEY_ SIGN
LJMP KEY5
KEYWRONG1： LJMP KEYWRONG
KEY5： MOV P3，#11111101B ; Second line
JB P3.4，KEY6
JB KEY_ SIGN，KEYWRONG2
MOV KEY_ WORD，#5
SETB KEY_ SIGN
KEY6： JB P3.5，KEY7
JB KEY_ SIGN，KEYWRONG2
MOV KEY_ WORD，#6
SETB KEY_ SIGN
KEY7： JB P3.6，KEY8
JB KEY_ SIGN，KEYWRONG2
MOV KEY_ WORD，#7
SETB KEY_ SIGN
KEY8： JB P3.7，KEY9
JB KEY_ SIGN，KEYWRONG2
MOV KEY_ WORD，#8
SETB KEY_ SIGN
LJMP KEY9
KEYWRONG2:LJMP KEYWRONG
KEY9： MOV P3，#11111011B ; Third line
JB P3.4，KEY10
JB KEY_ SIGN，KEYWRONG3
MOV KEY_ WORD，#9
SETB KEY_ SIGN
KEY10： JB P3.5，KEY11
JB KEY_ SIGN，KEYWRONG3
MOV KEY_ WORD，#10
SETB KEY_ SIGN
KEY11： JB P3.6，KEY12
JB KEY_ SIGN，KEYWRONG3
MOV KEY_ WORD，#11
SETB KEY_ SIGN
KEY12： JB P3.7，KEY13
JB KEY_ SIGN，KEYWRONG3
MOV KEY_ WORD，#12
SETB KEY_ SIGN
LJMP KEY13
KEYWRONG3:LJMP KEYWRONG
KEY13： MOV P3，#11110111B ; Fourth line
JB P3.4，KEY14
JB KEY_ SIGN，KEYWRONG4
MOV KEY_ WORD，#13
SETB KEY_ SIGN
KEY14： JB P3.5，KEY15
JB KEY_ SIGN，KEYWRONG4
MOV KEY_ WORD，#14
SETB KEY_ SIGN
KEY15： JB P3.6，KEY16
JB KEY_ SIGN，KEYWRONG4
MOV KEY_ WORD，#15
SETB KEY_ SIGN
KEY16： JB P3.7，SCAN_ END
JB KEY_ SIGN，KEYWRONG4
MOV KEY_ WORD，#16
SETB KEY_ SIGN
LJMP SCAN_ END
KEYWRONG4： LJMP KEYWRONG
KEYWRONG:CLR KEY_ SIGN
SCAN_ END:RET
RE_ DELAY： MOV R7，#5
DE2： MOV R6，#10
DE1
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