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EEPW首頁 > 嵌入式系統(tǒng) > 設(shè)計(jì)應(yīng)用 > PIC單片機(jī)內(nèi)部EEPROM讀寫程序

PIC單片機(jī)內(nèi)部EEPROM讀寫程序

作者：時(shí)間：2016-11-29 來源：網(wǎng)絡(luò)

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#INCLUDE"P16F877.inc"

W_TEMP EQU 20H ; 實(shí)際上20H、A0H、120H和1A0H

STATUS_TEMP EQU 21H ;在體0中建立保護(hù)單元

PCLATH_TEMP EQU 22H ;在體0中建立保護(hù)單元

ORG 000H

GOTO A1

ORG 004H;定時(shí)中斷入口地址

GOTO ZD01;

ORG 0CH

Q1 ADDWF PCL,1

RETLW 00C0H ;0

RETLW 00F9H ;1

RETLW 00A4H ;2

RETLW 00B0H ;3

RETLW 0099H ;4

RETLW 0092H ;5

RETLW 0082H ;6

RETLW 00F8H ;7

RETLW 0080H ;8

RETLW 0090H ;9

RETLW 0088H ;A

RETLW 0083H ;B

RETLW 00C6H ;C

RETLW 00A1H ;D

RETLW 0086H ;E

RETLW 008EH ;F

A1 MOVLW 1;位1顯示數(shù)

MOVWF 50H;

MOVLW 2;位2顯示數(shù)

MOVWF 51H;

MOVLW 3;位3顯示數(shù)

MOVWF 52H;

MOVLW 4;位4顯示數(shù)

MOVWF 53H;

CLRF 60H

MOVLW 4;顯示位數(shù)

MOVWF 40H;

MOVLW B00000001;位碼

MOVWF 41H;

MOVLW 50H;

MOVWF FSR ;間接尋址

BSF STATUS,RP0;選擇體1

BCF STATUS,RP1;

MOVLW 00H;1:2TMRO比例

MOVWF OPTION_REG;分頻1/2

BCF STATUS,RP0;體0

BCF STATUS,RP1;

MOVLW 0FFH;

MOVFW TMR0;初值

BCF INTCON,T0IF;清定時(shí)中斷標(biāo)志

BSF INTCON,T0IE;開定時(shí)中斷

BSF INTCON,GIE;開總中斷

;**********************************************************

; 按鍵修改數(shù)據(jù)程序

;**********************************************************

A2 BSF STATUS,RP0

BCF STATUS,RP1;體1

MOVLW 0FFH

MOVWF TRISB;設(shè)置B口為輸入口

BCF STATUS,RP0

BCF STATUS,RP1;體0

BTFSC PORTB,0;判斷B口第0位是否按下

GOTO A3;位0則按下按鍵

MOVLW 1;按下存1到EEPROM

MOVWF 61H;數(shù)據(jù)寄存器

CALL WR1;寫數(shù)據(jù)到EEPROM

A3 BCF STATUS,RP0

BCF STATUS,RP1;體0

BTFSC PORTB,1;判斷B口第1位是否按下

GOTO A4;

MOVLW 2;按下存2到EEPROM

MOVWF 61H;數(shù)據(jù)寄存器

CALL WR1;寫數(shù)據(jù)到寄存器

A4 BCF STATUS,RP0;

BCF STATUS,RP1;體0

BTFSC PORTB,2;判斷B口第2位是否按下

GOTO A5;

MOVLW 3;

MOVWF 61H;

CALL WR1;

A5 BCF STATUS,RP0;

BCF STATUS,RP1;

BTFSC PORTB,3;

GOTO A6;

MOVLW 4;

MOVWF 61H;

CALL WR1;

A6 BCF STATUS,RP0;

BCF STATUS,RP1;

BTFSC PORTB,4;

GOTO A7;

MOVLW 5;

MOVWF 61H;

CALL WR1;

A7 BCF STATUS,RP0;

BCF STATUS,RP1;

BTFSC PORTB,5;

GOTO A8;

MOVLW 6;

MOVWF 61H;

CALL WR1;

A8 BCF STATUS,RP0;

BCF STATUS,RP1;

BTFSC PORTB,6;

GOTO A9;

MOVLW 7;

MOVWF 61H;

CALL WR1;

A9 BCF STATUS,RP0;

BCF STATUS,RP1;

BTFSC PORTB,7;

GOTO A10;

MOVLW 8;

MOVWF 61H;

CALL WR1;

A10

CALL RD01;調(diào)用讀數(shù)據(jù)程序

GOTO A2;

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