用于汽车遥控的Ev1527的pic单片机软件接收解码程序,密码采用I2C总线方式存在EEPROM中

用于汽车遥控的Ev1527的pic单片机软件接收解码程序，密码采用I2C总线方式存在EEPROM中
LIST P=16f57
#INCLUDE "p16F5X.INC"
__CONFIG _CP_OFF&_WDT_OFF&_XT_OSC
;说明：SCL接单片机 RC0
; : SDA接单片机 RC1
;------------------------------------------------------------
;寄存器定义
;------------------------------------------------------------
BY_COUNT EQU 14H ;I2C
COUNT_T0 EQU 12H
COUNT_T1 EQU 13H
COUNT EQU 11H
STATUS EQU 3H
PORTB EQU 6H
PORTC EQU 7H
EEPROM EQU 08H
ADDR EQU 09H
BUFIN EQU 0AH
BUFOUT EQU 0BH
SLAVE EQU 0CH
TXBUF EQU 0DH
BIT EQU 0EH
DLY1 EQU 0FH
DLY2 EQU 10H
;******************************************

FLAG EQU 20H
IN_DATA_0 EQU 19H
IN_DATA_1 EQU 1AH
IN_DATA_2 EQU 1BH
COUNTER0 EQU 15H ;计数器
COUNTER1 EQU 16H
COUNTER2 EQU 17H
COUNTER3 EQU 18H
CAR_STATUS EQU 1CH ;
W_SHADOW EQU 1DH ;函数调用时传送参数
COUNTER EQU 1EH

DATA1 EQU 1FH ;保留四位按键信息
DEVICE_W EQU B'10100000' ;
DEVICE_R EQU B'10100001' ;

ADR_LOCK EQU 0x00 ;存储器锁门指令入口
ADR_UNLOCK EQU 0x10 ;存储器开门指令入口

DATA_2 EQU B'11001111'
DATA_1 EQU B'00100111'
DATA_U EQU B'10111000'
DATA_L EQU B'10110100'
;都为反码 与上位机通信
COMC_LOCK EQU B'11110111' ;开锁指令 00001000B
COMC_UNLOCK EQU B'11110001' ;锁门指令 00001110B
COMC_RELAY EQU B'11110010' ;继电器指令 00001101B
PORTA_S EQU B'11110001'
DI EQU 7
DO EQU 6
SDA EQU 1
SCL EQU 0
ACKF EQU 0


;--------------------------------------------------------------
;定义管脚
;-------------------------------------------------------------
#define STUDY PORTC,6
#define SIGNAL PORTC,3
#define LIGHT PORTC,5


ORG 00H
GOTO INT_INIT
;**********************
BSTART
BSF PORTC,SDA
BSF PORTC,SCL
MOVLW B'11001000'
TRIS PORTC
NOP
NOP
NOP
NOP
NOP
NOP
BCF PORTC,SDA
NOP
NOP
NOP
NOP
NOP
BCF PORTC,SCL
NOP
NOP
RETLW 0
;**********************
BSTOP
BCF PORTC,SDA
MOVLW B'11001000'
TRIS PORTC
BCF PORTC,SDA
NOP
NOP
NOP
BSF PORTC,SCL
NOP
NOP
NOP
BSF PORTC,SDA
NOP
NOP
BCF PORTC,SCL
NOP
NOP
RETLW 0
;**********************
TX
MOVLW D'8'
MOVWF BIT
TXLP BCF EEPROM,DO
BT

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