MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE 1 VALUE

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1 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE LIST N= ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; _ ; / \ ( _ )/ _ \ / \ / _ \ / ; / _ \ / _ \ (_) ) \ ; / \ (_) \, / / _ ) ; /_/ \_\_ \ / /_/ \ \ / / _ ; ; ; _ \ ; _) ' / _ \ / _` ' / _` '_ ` _ \ '_ ` _ \ / _ \ ' ; / (_) (_ (_ / ; _ _ \ / \, _ \,_ _ _ _ _ _ _ \ _ ; / ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; ; Copyright (C) 2013 VICTOR MOISEY ; Permission is granted to copy, distribute and/or modify this document ; under the terms of the GNU Free Documentation License, Version ; or any later version published by the Free Software Foundation; ; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts ; A copy of the license is included in the section entitled "GNU ; Free Documentation License" ; ; ; ; ; ; TITLE ""

2 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE PAGE

3 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE PAGE #INCLUDE P16F877.INC LIST ;========================================================================== ; MPASM PIC16F877 processor include ; ; (c) Copyright Microchip Technology, All rights reserved ;========================================================================== LIST F CONFIG _XT_OSC&_WDT_OFF&_PWRTE_ON&_LVP_OFF IDLOCS 0051 ; 33H ; ; PIN NAME DESIGNATION DISCRIPTION ; ; 2 RA0/AN0 PRESS SWITCH DIGITAL INPUT ; 3 RA1/AN1 NOT USED DIGITAL OUTPUT ; 4 RA2/AN2/Vref- NOT USED DIGITAL OUTPUT ; 5 RA3/AN3/Vref+ NOT USED DIGITAL OUTPUT ; 6 RA4/T0CKI NOT USED DIGITAL OUTPUT ; 7 RA5/AN4/SS NOT USED DIGITAL OUTPUT ; ; 33 RB0/INT DATA IN/OUT DIGITAL I/O PULLED UP ; 34 RB1 DATA IN/OUT DIGITAL I/O PULLED UP ; 35 RB2 DATA IN/OUT DIGITAL I/O PULLED UP ; 36 RB3/PGM DATA IN/OUT DIGITAL I/O PULLED UP ; 37 RB4 DATA IN/OUT DIGITAL I/O PULLED UP ; 38 RB5 DATA IN/OUT DIGITAL I/O PULLED UP ; 39 RB6/PGC DATA IN/OUT DIGITAL I/O PULLED UP ; 40 RB7/PGD DATA IN/OUT DIGITAL I/O PULLED UP ; ; 15 RC0/T1OSO/T1CK1 RED DIGITAL OUTPUT ; 16 RC1/T1OSI/CCP2 GREEN DIGITAL OUTPUT ; 17 RC2/CCP1 BLUE DIGITAL OUTPUT ; 18 RC3/SCK/SCL NOT USED DIGITAL OUTPUT ; 23 RC4/SDI/SDA CTS DIGITAL OUTPUT ; 24 RC5/SDO RTS DIGITAL INPUT ; 25 RC6/TX/CK TX SERIAL OUTPUT ; 26 RC7/RX/DT RX SERIAL INPUT ; ; 19 RD0/PSP0 XTAL1 DIGITAL OUTPUT ; 20 RD1/PSP1 PROG DIGITAL OUTPUT ; 21 RD2/PSP2 P_33 DIGITAL OUTPUT ; 22 RD3/PSP3 P_34 DIGITAL OUTPUT ; 27 RD4/PSP4 P_35 DIGITAL OUTPUT ; 28 RD5/PSP5 VCC_OFF DIGITAL OUTPUT ; 29 RD6/PSP6 VPP_OFF DIGITAL OUTPUT ; 30 RD7/PSP7 _12V_5V DIGITAL OUTPUT ; ; 8 RE0/RD/AN5 NOT USED DIGITAL OUTPUT ; 9 RE1/WR/AN6 NOT USED DIGITAL OUTPUT ; 10 RE2/CS/AN7 NOT USED DIGITAL OUTPUT ; ; 12 VSS1-0V ; 31 VSS2-0V ; 11 VDD1 - +5V ; 32 VDD2 - +5V ; ; 1 MCLR/Vpp/THV ; 13 OSC1/CLKIN ; 14 OSC2/CLKOUT ; ' ' ' ' ' ; ; CRYSTAL FREQUENCY = Hertz ; CYCLE TIME = Hertz/1,085 micro seconds ;

4 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE PAGE #DEFINE _Z STATUS,Z #DEFINE _C STATUS,C #DEFINE _DC STATUS,DC #DEFINE _RP0 STATUS,RP #DEFINE RED PORTC,0 ; PROGRAMMER STATUS LED #DEFINE GREEN PORTC,1 ; PROGRAMMER STATUS LED #DEFINE BLUE PORTC,2 ; PROGRAMMER STATUS LED #DEFINE PROG PORTD, #DEFINE _12V_5V PORTD,7 ; 0=+12V, 1=+5V #DEFINE XTAL1 PORTD, #DEFINE VPP_OFF PORTD,6 ; 0=VPP, 1=VPP OFF #DEFINE RTS PORTC,5 ; SERIAL PORT CONTROL #DEFINE CTS PORTC,4 ; SERIAL PORT CONTROL #DEFINE BUFFER_FLAG CONTROL, #DEFINE PRESS_SWITCH PORTA, #DEFINE BYTE_FLAG CONTROL, #DEFINE BYTE_ERROR CONTROL, #DEFINE ADDRESS_DIFFERENCE CONTROL, ; ; PORT C ; _12V_5V VPP_OFF VCC_OFF P_35 P_34 P_33 PROG XTAL SIGNATURE_MODE EQU 000H ; READ_MODE EQU 010H ; WRITE_MODE EQU 018H ; ERASE_MODE EQU 004H ; C LOCK_MODE_1 EQU 01CH ; C LOCK_MODE_2 EQU 00CH ; C STEP_1 EQU 0C0H ; STEP_2 EQU 082H ; ; CBLOCK 20H SERIAL_BYTE BYTE_COUNT_HI BYTE_COUNT_LO D D D HEX_ BYTE_COUNT SERIAL_BUFFER_COUNTER ADDRESS_HI A ADDRESS_LO B SERIAL_BUFFER: B THIRTY_SEC_DELAY C CONTROL D BUFFER_BYTE E HEX_COUNTER F SIGNATURE_BYTE_COUNTER SIGNATURE_BYTE_0: OFFSET TABLE_POINTER COLUMN_COUNTER ASCII_CHAR_HI ASCII_CHAR_LO MASTER_ADDR_LO MASTER_ADDR_HI A MODE ENDC ; BANK0 LIMIT: 7FH ;

5 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE PAGE ORG CLRF PORTA CLRF PORTB CLRF PORTC CLRF PORTD CLRF PORTE BSF _RP0 ; BANK MOVLW MOVWF TRISA ; RA5 TO RA1 - DIGITAL OUTPUTS ; RA0 - DIGITAL INPUT CLRF TRISB ; PORTB ALL OUTPUTS CLRF TRISD ; ALL PINS DIGITAL OUTPUTS. 000A CLRF TRISE ; RE0 TO RE2 - DIGITAL OUTPUTS. 000B 30E MOVLW 0E0H ; RC7 TO RC5 - DIGITAL INPUT, RC4 TO RC0 - DIGITAL OUTPUT. 000C MOVWF TRISC 000D MOVLW 6 ; RA0-RA3, RA5, RE0-RE2 DIGITAL I/O. 000E 009F MOVWF ADCON F BCF _RP0 ; BANK BC CLRF CONTROL BSF CTS CALL POWER_DOWN A CLRF SERIAL_BUFFER_COUNTER MOVLW 011H ; TIMER1-1:2 PRESCALE, OSCILLATOR IS SHUT OFF, INTERNAL ; CLOCK, TIMER 1 ON MOVWF T1CON BSF _RP0 ; BANK MOVLW 23 ; 3,6864MHz CLOCK, 9600B/s, BRGH= MOVWF SPBRG BSF TXSTA,BRGH ; BAUD RATE SELECT BIT - HIGH SPEED. 001A BCF _RP0 ; BANK B BSF RCSTA,SPEN ; ENABLE SYNCHRONOUS SERIAL PORT. 001C BSF RCSTA,CREN ; ENABLE RECEPTION D BSF _RP0 ; BANK E BSF TXSTA,TXEN ; ENABLE TRANSMISSION F MOVLW 57H ; PORTB WEAK PULLUPS ; INTEG - NO INFO IN MANUAL FOR THIS ; T0CS, INTERNAL INSRTUCTION CYCLE CLOCK ; T0SE, NOT RELEVANT ; PSA, ASSIGNED TO TIMER0 MODULE ; PS2:PS0, 1: MOVWF OPTION_REG L2340: BCF _RP0 ; BANK CALL LF B CALL DRAW_LINE CALL SIGN_ON A CALL CONFIGURATION B CALL DRAW_LINE CALL LF ; MENU_LOOP: CALL MENU MENU_LOOP_10: A CALL GREEN_ON 002A 23A CALL SOCKET_DEVICE 002B CALL LF 002C 303E MOVLW ">" 002D 00A MOVWF SERIAL_BYTE 002E 235A CALL SERIAL_OUT 002F BCF CTS ; ALLOW BYTE FROM CONSOLE CALL SERIAL_IN ; FETCH MENU BYTE BSF CTS ; NO MORE BYTES FOR NOW B MOVLW 07BH ; CONVERT LOWER CASE a-z TO UPPER CASE A-Z SUBWF SERIAL_BYTE,W BTFSC _C B GOTO $+6 ; SERIAL IN IS GREATER THAN a-z WINDOW F MOVLW ; SERIAL IN IS WITHIN THE a-z WINDOW ADDWF SERIAL_BYTE,W C BTFSS _C B GOTO $+2 ; SERIAL IN IS LESS THAN THE a-z WINDOW. 003A 12A BCF SERIAL_BYTE,5 ; CHANGE LOWER CASE TO UPPER CASE B 300D MOVLW 0DH ; CHANGE CARRIAGE RETURN TO AN "M" 003C XORWF SERIAL_BYTE,W 003D 1D BTFSS _Z 003E GOTO $+3

6 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE 6 003F 304D MOVLW "M" A MOVWF SERIAL_BYTE A CALL SERIAL_OUT CALL LF MOVLW "9" ; TEST FOR BINARY PROGRAM MODE XORWF SERIAL_BYTE,W BTFSC _Z GOTO BINARY_PROGRAM MOVLW "4" ; TEST FOR BINARY VERIFY MODE XORWF SERIAL_BYTE,W BTFSC _Z 004A 208E CALL BINARY_VERIFY B MOVLW "2" ; TEST FOR READ DEVICE BINARY MODE. 004C XORWF SERIAL_BYTE,W 004D BTFSC _Z 004E 298F GOTO READ_DEVICE_BINARY F MOVLW "7" ; TEST FOR LOCK BITS MODE XORWF SERIAL_BYTE,W BTFSC _Z FC GOTO LOCK_BITS MOVLW "8" ; TEST FOR HEX PROGRAM MODE XORWF SERIAL_BYTE,W BTFSC _Z D GOTO HEX_PROGRAM MOVLW "5" ; TEST FOR SIGNATURE MODE XORWF SERIAL_BYTE,W BTFSC _Z 005A 29CC GOTO READ_SIGNATURE_BYTES B 304D MOVLW "M" ; TEST FOR MENU. 005C XORWF SERIAL_BYTE,W 005D BTFSC _Z 005E GOTO MENU_LOOP F MOVLW "1" ; TEST FOR READ DEVICE HEX XORWF SERIAL_BYTE,W BTFSC _Z A CALL READ_DEVICE_HEX MOVLW "3" ; TEST FOR HEX VERIFY XORWF SERIAL_BYTE,W BTFSC _Z CALL HEX_VERIFY MOVLW "6" ; TEST FOR BLANK CHECK XORWF SERIAL_BYTE,W BTFSC _Z 006A 28A GOTO BLANK_CHECK B MOVLW "0" ; TEST FOR ERASE. 006C XORWF SERIAL_BYTE,W 006D BTFSC _Z 006E 28BF GOTO ERASE_DEVICE F GOTO MENU_LOOP_ ; BINARY_PROGRAM: CALL RED_ON F CALL SEND_BINARY_FILE CALL FILE_INPUT_DELAY B CALL CHIP_ERASE ; ERASE DEVICE AND SET ALL PINS TO ZERO B CALL PROGRAMMING F CALL START_TIMER_ MOVLW WRITE_MODE CALL SET_MODE L2457: CALL FETCH_BYTE ; FETCH BYTE FROM BUFFER C3C BTFSS BUFFER_FLAG ; TEST FOR BYTE VALIDITY. 007A 288A GOTO L2520 ; NO BYTE AVAILABLE. 007B 30FF MOVLW 0FFH ; FF'S ARE NOT PROGRAMMED. 007C 063D XORWF BUFFER_BYTE,W 007D BTFSC _Z 007E GOTO L F 083D MOVF BUFFER_BYTE,W ; TRANSFER BYTE TO AT89C MOVWF PORTB CALL DELAY_500US BCF PROG ; PROGRAMMING PULSE GOTO $ GOTO $+1

7 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE BSF PROG CALL WAIT_PROG ; 2ms DELAY FOR PROGRAMMING CYCLE TO FINISH L2470: A CALL INCREMENT_ADDRESS_COUNTER A CALL TOGGLE_RED GOTO L A L2520: 008A CALL POWER_DOWN 008B CLRF T2CON ; STOP TIMER C 237D CALL PROGRAMMING_COMPLETE 008D GOTO MENU_LOOP_ ; E BINARY_VERIFY: E 22CB CALL BLUE_ON F 237F CALL SEND_BINARY_FILE CALL FILE_INPUT_DELAY CALL VERIFYING F CALL START_TIMER_ MOVLW READ_MODE CALL SET_MODE L2840: CALL FETCH_BYTE ; FETCH BYTE FROM BUFFER C3C BTFSS BUFFER_FLAG ; TEST FOR BYTE VALIDITY F GOTO L2850 ; VALID BYTE NOT AVAILABLE, END OF FILE MOVF PORTB,W ; READ BYTE FROM DEVICE D XORWF BUFFER_BYTE,W 009A 1D BTFSS _Z 009B 28A GOTO L2860 ; VERIFY ERROR C 232A CALL INCREMENT_ADDRESS_COUNTER D CALL TOGGLE_BLUE E GOTO L F L2850: 009F CALL VERIFY_SUCCESSFUL 00A CALL POWER_DOWN 00A GOTO MENU_LOOP_10 00A L2860: 00A CALL POWER_DOWN 00A CLRF T2CON ; STOP TIMER 2. 00A CALL EMPTY_BUFFER 00A CALL VERIFY_ERROR 00A GOTO MENU_LOOP_ ; A BLANK_CHECK: A7 22CB CALL BLUE_ON A MOVLW READ_MODE 00A CALL SET_MODE AA BSF _12V_5V ; VPP IS SET TO 5V. 00AB BCF VPP_OFF ; VPP IS SWITCHED ON. 00AC 22DA CALL DELAY_10MS AD MOVLW 8 00AE 00A MOVWF BYTE_COUNT_HI 00AF L2740: 00AF 01A CLRF BYTE_COUNT_LO 00B L2750: 00B MOVF PORTB,W 00B1 3AFF XORLW 0FFH 00B2 1D BTFSS _Z 00B3 28BC GOTO L2760 ; DEVICE NOT BLANK. 00B4 232A CALL INCREMENT_ADDRESS_COUNTER B5 0BA DECFSZ BYTE_COUNT_LO,F 00B6 28B GOTO L B7 0BA DECFSZ BYTE_COUNT_HI,F 00B8 28AF GOTO L B CALL POWER_DOWN 00BA CALL DEVICE_BLANK 00BB GOTO MENU_LOOP_10 00BC L2760: 00BC CALL POWER_DOWN 00BD CALL DEVICE_NOT_BLANK 00BE GOTO MENU_LOOP_ ; BF ERASE_DEVICE:

8 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE 8 00BF 23A CALL PRESS_0 00C BCF CTS 00C CALL SERIAL_IN 00C BSF CTS 00C MOVLW "0" 00C XORWF SERIAL_BYTE,W 00C5 1D BTFSS _Z 00C6 28D GOTO $+11 00C7 23A CALL PRESS_STAR 00C BCF CTS 00C CALL SERIAL_IN 00CA BSF CTS 00CB 302A MOVLW "*" 00CC XORWF SERIAL_BYTE,W 00CD 1D BTFSS _Z 00CE 28D GOTO $+3 00CF 222B CALL CHIP_ERASE 00D GOTO MENU_LOOP_10 00D1 23A CALL DEVICE_NOT_ERASED 00D GOTO MENU_LOOP_ ; D HEX_PROGRAM: D CALL RED_ON ; RED LED INDICATES PROGRAMMING MODE D CALL SEND_HEX_FILE ; PROMPT USER D CALL FILE_INPUT_DELAY ; WAIT FOR FILE TO BE SENT D6 222B CALL CHIP_ERASE ; ERASE DEVICE AND SET ALL SOCKET PINS TO ZERO D7 237B CALL PROGRAMMING ; INFORM USER D8 235F CALL START_TIMER_2 ; FLASH RED LED WHILE PROGRAMMING D9 01C CLRF MASTER_ADDR_LO ; KEEP TRACK OF INPUT BYTE ADDRESSES. 00DA 01C CLRF MASTER_ADDR_HI DB MOVLW WRITE_MODE 00DC CALL SET_MODE DD L2560: 00DD CALL FETCH_BYTE ; WAIT FOR COLON. 00DE 1C3C BTFSS BUFFER_FLAG ; MAKE SURE THERE IA A VALID BYTE. 00DF 292C GOTO L2730 ; INVALID BYTE. 00E0 303A MOVLW ":" 00E1 063D XORWF BUFFER_BYTE,W 00E2 1D BTFSS _Z ; COLON FOUND. 00E3 28DD GOTO $-6 ; NOT COLON, TRY ANOTHER BYTE. 00E CALL GET_HEX_BYTE 00E5 193C BTFSC BYTE_ERROR 00E6 292C GOTO L E MOVF HEX_,W ; BYTE VALID, RECORD LENGTH, TEST FOR ZERO. 00E BTFSC _Z 00E9 291C GOTO L2580 ; RECORD LENGTH=0. 00EA 00BE MOVWF HEX_COUNTER 00EB CALL GET_HEX_BYTE ; FETCH MSB OF DATA ADDRESS. 00EC 193C BTFSC BYTE_ERROR 00ED 292C GOTO L2730 ; INPUT BYTE ERROR. 00EE MOVF HEX_,W 00EF 00A MOVWF ADDRESS_HI 00F CALL GET_HEX_BYTE ; FETCH LSB OF DATA ADDRESS. 00F1 193C BTFSC BYTE_ERROR 00F2 292C GOTO L2730 ; INPUT BYTE ERROR. 00F MOVF HEX_,W 00F4 00AA MOVWF ADDRESS_LO 00F CALL GET_HEX_BYTE ; RECORD TYPE. DO NOTHING WITH THIS. 00F6 193C BTFSC BYTE_ERROR 00F7 292C GOTO L F L2690: 00F CALL GET_HEX_BYTE ; FETCH DATA BYTE. 00F9 193C BTFSC BYTE_ERROR 00FA 292C GOTO L2730 ; BYTE ERROR. 00FB L2695: 00FB 082A MOVF ADDRESS_LO,W ; COMPARE MASTER AND INPUT ADDRESSES. 00FC XORWF MASTER_ADDR_LO,W 00FD 1D BTFSS _Z 00FE GOTO L2735 ; ADDRESSES DIFFERENT. 00FF MOVF ADDRESS_HI,W XORWF MASTER_ADDR_HI,W D BTFSS _Z GOTO L2735 ; ADDRESSES DIFFERENT BC BCF ADDRESS_DIFFERENCE ; INDICATE DIFFERENCE FF MOVLW 0FFH ; FF'S ARE NOT PROGRAMMED XORWF HEX_,W BTFSC _Z GOTO L MOVF HEX_,W ; TRANSFER BYTE TO AT89C MOVWF PORTB 010A CALL DELAY_500US 010B BCF PROG ; PROGRAMMING PULSE. 010C 290D GOTO $+1 ; TWO MACHINE CYCLES. 010D 290E GOTO $+1

9 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE 9 010E BSF PROG 010F CALL WAIT_PROG ; 2ms DELAY FOR PROGRAMMING CYCLE TO FINISH L2700: A CALL INCREMENT_ADDRESS_COUNTER F CALL INCREMENT_MASTER_ADDRESS BC BTFSC ADDRESS_DIFFERENCE FB GOTO L A CALL TOGGLE_RED CALL INCREMENT_ADDRESS ; INCREMENT RECORD ADDRESS BBE DECFSZ HEX_COUNTER,F ; COUNT BYTES IN RECORD F GOTO L CALL GET_HEX_BYTE ; READ CHECKSUM C BTFSC BYTE_ERROR 011A 292C GOTO L2730 ; BYTE ERROR. 011B 28DD GOTO L2560 ; READ ANOTHER RECORD. 011C L2580: 011C CALL GET_HEX_BYTE ; READ ADDRESS HIGH. 011D 193C BTFSC BYTE_ERROR 011E 292C GOTO L2730 ; INPUT BYTE ERROR. 011F CALL GET_HEX_BYTE ; READ ADDRESS LOW C BTFSC BYTE_ERROR C GOTO L2730 ; INPUT BYTE ERROR CALL GET_HEX_BYTE ; READ RECORD TYPE C BTFSC BYTE_ERROR C GOTO L2730 ; INPUT BYTE ERROR CALL GET_HEX_BYTE ; READ CHECKSUM C BTFSC BYTE_ERROR C GOTO L2730 ; INPUT BYTE ERROR CALL POWER_DOWN CLRF T2CON 012A 237D CALL PROGRAMMING_COMPLETE 012B GOTO MENU_LOOP_10 012C L2730: 012C CALL POWER_DOWN 012D CLRF T2CON ; STOP TIMER E CALL EMPTY_BUFFER 012F CALL INPUT_BYTE_ERROR GOTO MENU_LOOP_ L2735: BC BSF ADDRESS_DIFFERENCE GOTO L ; HEX_VERIFY: CB CALL BLUE_ON CALL SEND_HEX_FILE CALL FILE_INPUT_DELAY CALL VERIFYING F CALL START_TIMER_ C CLRF MASTER_ADDR_LO ; KEEP TRACK OF INPUT BYTE ADDRESSES C CLRF MASTER_ADDR_HI A MOVLW READ_MODE 013B CALL SET_MODE 013C L2790: 013C CALL FETCH_BYTE ; WAIT FOR COLON. 013D 1C3C BTFSS BUFFER_FLAG ; MAKE SURE THERE IA A VALID BYTE. 013E GOTO L2820 ; INVALID BYTE. 013F 303A MOVLW ":" D XORWF BUFFER_BYTE,W D BTFSS _Z C GOTO $ CALL GET_HEX_BYTE C BTFSC BYTE_ERROR GOTO L MOVF HEX_,W ; BYTE VALID, RECORD LENGTH, TEST FOR ZERO BTFSC _Z GOTO L2810 ; RECORD LENGTH= BE MOVWF HEX_COUNTER A CALL GET_HEX_BYTE ; FETCH MSB OF DATA ADDRESS. 014B 193C BTFSC BYTE_ERROR 014C GOTO L2820 ; INPUT BYTE ERROR. 014D MOVF HEX_,W 014E 00A MOVWF ADDRESS_HI F CALL GET_HEX_BYTE ; FETCH LSB OF DATA ADDRESS C BTFSC BYTE_ERROR GOTO L2820 ; INPUT BYTE ERROR MOVF HEX_,W AA MOVWF ADDRESS_LO CALL GET_HEX_BYTE ; RECORD TYPE. DO NOTHING WITH THIS C BTFSC BYTE_ERROR GOTO L L2800:

10 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE CALL GET_HEX_BYTE ; FETCH DATA BYTE C BTFSC BYTE_ERROR GOTO L2820 ; BYTE ERROR. 015A L2805: 015A 082A MOVF ADDRESS_LO,W ; COMPARE MASTER AND INPUT ADDRESSES. 015B XORWF MASTER_ADDR_LO,W 015C 1D BTFSS _Z 015D 298D GOTO L2835 ; ADDRESSES DIFFERENT E MOVF ADDRESS_HI,W 015F XORWF MASTER_ADDR_HI,W D BTFSS _Z D GOTO L2835 ; ADDRESSES DIFFERENT BC BCF ADDRESS_DIFFERENCE ; ADDRESSES ARE THE SAME MOVF PORTB,W XORWF HEX_,W D BTFSS _Z GOTO L2830 ; VERIFY ERROR L2808: A CALL INCREMENT_ADDRESS_COUNTER F CALL INCREMENT_MASTER_ADDRESS BC BTFSC ADDRESS_DIFFERENCE 016A 295A GOTO L B CALL TOGGLE_BLUE C CALL INCREMENT_ADDRESS ; INCREMENT RECORD ADDRESS. 016D 0BBE DECFSZ HEX_COUNTER,F ; COUNT BYTES IN THE RECORD. 016E GOTO L F CALL GET_HEX_BYTE ; READ CHECKSUM C BTFSC BYTE_ERROR GOTO L2820 ; BYTE ERROR C GOTO L2790 ; READ ANOTHER RECORD L2810: CALL GET_HEX_BYTE ; READ ADDRESS HIGH C BTFSC BYTE_ERROR GOTO L2820 ; INPUT BYTE ERROR CALL GET_HEX_BYTE ; READ ADDRESS LOW C BTFSC BYTE_ERROR GOTO L2820 ; INPUT BYTE ERROR CALL GET_HEX_BYTE ; READ RECORD TYPE. 017A 193C BTFSC BYTE_ERROR 017B GOTO L2820 ; INPUT BYTE ERROR. 017C CALL GET_HEX_BYTE ; READ CHECKSUM. 017D 193C BTFSC BYTE_ERROR 017E GOTO L2820 ; INPUT BYTE ERROR. 017F CALL POWER_DOWN CLRF T2CON CALL VERIFY_SUCCESSFUL GOTO MENU_LOOP_ L2820: CALL POWER_DOWN CLRF T2CON CALL EMPTY_BUFFER CALL INPUT_BYTE_ERROR GOTO MENU_LOOP_ L2830: CALL POWER_DOWN CLRF T2CON ; STOP TIMER A CALL EMPTY_BUFFER 018B CALL VERIFY_ERROR 018C GOTO MENU_LOOP_10 018D L2835: 018D 15BC BSF ADDRESS_DIFFERENCE 018E GOTO L ; F READ_DEVICE_BINARY: F CALL CODE_DATA CB CALL BLUE_ON MOVLW READ_MODE CALL SET_MODE F CALL START_TIMER_ MOVLW A MOVWF BYTE_COUNT_HI L2500: A CLRF BYTE_COUNT_LO L2510: MOVF PORTB,W A MOVWF SERIAL_BYTE A CALL SERIAL_OUT A 232A CALL INCREMENT_ADDRESS_COUNTER B CALL TOGGLE_BLUE C 0BA DECFSZ BYTE_COUNT_LO,F 019D GOTO L2510

11 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE E 0BA DECFSZ BYTE_COUNT_HI,F 019F GOTO L A CALL LF 01A CALL POWER_DOWN 01A CLRF T2CON ; STOP TIMER 2. 01A GOTO MENU_LOOP_ ; A READ_DEVICE_HEX: A CALL CODE_DATA A5 22CB CALL BLUE_ON A MOVLW READ_MODE 01A CALL SET_MODE A8 235F CALL START_TIMER_ A9 01C CLRF MASTER_ADDR_HI 01AA 01C CLRF MASTER_ADDR_LO 01AB MOVLW 16 01AC 00C MOVWF COLUMN_COUNTER 01AD MOVLW 8 01AE 00A MOVWF BYTE_COUNT_HI 01AF L2770: 01AF 01A CLRF BYTE_COUNT_LO 01B L2780: 01B0 1E BTFSS COLUMN_COUNTER,4 01B1 29B GOTO $ B MOVF MASTER_ADDR_HI,W 01B3 234C CALL SEND_HEX_BYTES B MOVF MASTER_ADDR_LO,W 01B5 234C CALL SEND_HEX_BYTES B6 22C CALL BLANK_SPACE B MOVF PORTB,W 01B8 234C CALL SEND_HEX_BYTES B9 22C CALL BLANK_SPACE BA 0BC DECFSZ COLUMN_COUNTER,F 01BB 29BF GOTO $+4 01BC CALL LF 01BD MOVLW 16 01BE 00C MOVWF COLUMN_COUNTER BF 232A CALL INCREMENT_ADDRESS_COUNTER C CALL TOGGLE_BLUE C MOVLW 1 ; INCREMENT MASTER ADDRESS. 01C2 07C ADDWF MASTER_ADDR_LO,F 01C BTFSC _C 01C4 07C ADDWF MASTER_ADDR_HI,F C5 0BA DECFSZ BYTE_COUNT_LO,F 01C6 29B GOTO L C7 0BA DECFSZ BYTE_COUNT_HI,F 01C8 29AF GOTO L C CALL POWER_DOWN 01CA CLRF T2CON ; STOP TIMER 2. 01CB GOTO MENU_LOOP_ ; CC READ_SIGNATURE_BYTES: CC 22CB CALL BLUE_ON CD MOVLW SIGNATURE_MODE 01CE CALL SET_MODE CF MOVLW SIGNATURE_BYTE_0 01D MOVWF FSR 01D MOVLW 3 01D2 00BF MOVWF SIGNATURE_BYTE_COUNTER D MOVF PORTB,W 01D MOVWF INDF D5 232A CALL INCREMENT_ADDRESS_COUNTER D6 0A INCF FSR,F 01D7 0BBF DECFSZ SIGNATURE_BYTE_COUNTER,F 01D8 29D GOTO $ D CALL SIGNATURE_BYTES DA MOVLW SIGNATURE_BYTE_0 01DB MOVWF FSR 01DC MOVLW 3

12 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE 12 01DD MOVF INDF,W 01DE 234C CALL SEND_HEX_BYTES DF 22C CALL BLANK_SPACE 01E0 22D CALL DASH 01E1 22C CALL BLANK_SPACE 01E2 301E MOVLW 1EH ; TEST FOR ATMEL DEVICE. 01E XORWF INDF,W 01E4 1D BTFSS _Z 01E5 29E GOTO $+3 01E CALL ATMEL_DEVICE 01E7 29E GOTO $+2 01E8 239D CALL UNKNOWN_DEVICE 01E9 0A INCF FSR,F 01EA MOVF INDF,W 01EB 234C CALL SEND_HEX_BYTES EC 22C CALL BLANK_SPACE 01ED 22D CALL DASH 01EE 22C CALL BLANK_SPACE 01EF MOVLW 21H ; TEST FOR 89C F XORWF INDF,W 01F1 1D BTFSS _Z 01F2 29F GOTO $+3 01F3 239B CALL AT89C F4 29F GOTO $+2 01F5 239F CALL UNKNOWN_TYPE 01F6 0A INCF FSR,F 01F MOVF INDF,W 01F8 234C CALL SEND_HEX_BYTES F CALL LF 01FA CALL POWER_DOWN 01FB GOTO MENU_LOOP_ ; FC LOCK_BITS: 01FC CALL RED_ON FD CALL PRESS_1OR FE BCF CTS ; ALLOW BYTES TO BE SENT FROM CONSOLE. 01FF CALL SERIAL_IN MOVLW "1" XORWF SERIAL_BYTE,W BTFSC _Z A GOTO LOCK MOVLW "2" XORWF SERIAL_BYTE,W D BTFSS _Z FF GOTO $-8 ; LOOP UNTIL A '1' OR A '2' IS RECEIVED LOCK: BSF CTS ; CONSOLE BYTES NOT NEEDED NOW C MOVLW LOCK_MODE_1 020A CALL SET_MODE B BCF _12V_5V 020C BCF VPP_OFF 020D 22E CALL DELAY_1MS E BCF PROG 020F 2A GOTO $ A GOTO $ BSF PROG CALL WAIT_PROG MOVLW "2" ; LOCK MODE XORWF SERIAL_BYTE,W D BTFSS _Z A GOTO LOCK_END C MOVLW LOCK_MODE_ CALL SET_MODE BCF _12V_5V ; SET VPP TO 12V. 021A BCF VPP_OFF ; VPP-HIGH. 021B 22E CALL DELAY_1MS C BCF PROG 021D 2A1E GOTO $+1 021E 2A1F GOTO $+1 021F BSF PROG CALL WAIT_PROG ; WAIT PROG IS 2x 1ms DELAYS LOCK_END: MOVLW "1" XORWF SERIAL_BYTE,W BTFSC _Z A GOTO $ F CALL LOCK_BIT_ CALL POWER_DOWN GOTO MENU_LOOP_ D CALL LOCK_BIT_ CALL POWER_DOWN

13 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE A GOTO MENU_LOOP_10

14 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE PAGE ; ; ; / ) _ \ / _ \ \ / ; \ \ _ \ _) \ _ \ \ ; ) _ _) _ < _ _ \ ) ; / \ / / _ \_\\ / \ / _ _ \_ / ; ; B CHIP_ERASE: 022B CALL RED_ON C MOVLW ERASE_MODE 022D CALL SET_MODE E BCF _12V_5V ; SET VPP TO 12V. 022F BCF VPP_OFF ; VPP-HIGH E CALL DELAY_1MS BCF PROG ; ERASE TAKES PLACE HERE DA CALL DELAY_10MS BSF PROG BSF _12V_5V ; BRING VPP DOWN TO 5V DA CALL DELAY_10MS CALL POWER_DOWN CALL DEVICE_ERASED RETURN ; ; FETCH BYTE ; ~~~~~~~~~~ ; FETCH BYTE CHECKS SERIAL_BUFFER_COUNTER TO SEE IF THERE ARE ANY BYTES AVAILABLE. IF SO, THE OLDEST ; BYTE IS READ AND PLACED IN BUFFER_BYTE. BUFFER_FLAG IS SET WHEN A BYTE IS READ AND CLEARED IF NO BYTE ; IS FOUND FETCH_BYTE: A MOVF SERIAL_BUFFER_COUNTER,F ; SEE IF BYTES ARE AVAILABLE IN BUFFER. 023A 1D BTFSS _Z 023B 2A GOTO $+7 ; BUFFER HAS BYTES. 023C CALL FILL_BUFFER 023D 08A MOVF SERIAL_BUFFER_COUNTER,F 023E 1D BTFSS _Z ; BUFFER IS EMPTY. 023F 2A GOTO $+3 ; BUFFER HAS BYTES C BCF BUFFER_FLAG RETURN MOVF INDF,W ; READ OLDEST BYTE BD MOVWF BUFFER_BYTE C BSF BUFFER_FLAG ; INDICATE BYTE FOUND A INCF FSR,F ; POINT TO NEXT BUFFER LOCATION A DECF SERIAL_BUFFER_COUNTER,F RETURN ; ; FILE INPUT DELAY ; ~~~~~~~~~~~~~~~~ ; FILE INPUT DELAY STARTS A 31 SECOND DELAY TO ALLOW THE USER TO START SENDING AN INPUT FILE. AFTER ; SECONDS OR A KEY PRESS A RETURN IS EXECUTED FILE_INPUT_DELAY: E MOVLW 30 ; WAIT FOR 30 SECONDS BB MOVWF THIRTY_SEC_DELAY 024A 22EE CALL DELAY_1S 024B MOVLW 1 024C XORWF PORTC,F 024D 1C BTFSS PRESS_SWITCH ; CHECK PRESS SWITCH. 024E 2A GOTO $+3 ; PRESS SWITCH DOWN, SHORTEN DELAY TIME. 024F 0BBB DECFSZ THIRTY_SEC_DELAY,F ; PRESS SWITCH UP, CONTINUE COUNTDOWN A4A GOTO $ EE CALL DELAY_1S BD CALL ALL_OFF RETURN ; ; FILL BUFFER ; ~~~~~~~~~~~ ; FILL BUFFER RETURNS WITH AS MANY BYTES AS ARE AVAILABLE FROM THE SERIAL PORT. THE BUFFER HAS A ; CAPACITY OF 16 BYTES TO CORRESPOND WITH THE HOST PC SERIAL BUFFER. BUFFER BYTES ARE COUNTED BY ; SERIAL_BUFFER_COUNTER. A ZERO INDICATES THAT THE BUFFER IS EMPTY FILL_BUFFER: B MOVLW SERIAL_BUFFER ; POINT TO START OF BUFFER MOVWF FSR A CLRF SERIAL_BUFFER_COUNTER ; INITIAL NUMBER OF BYTES A BTFSC RTS ; MAKE SURE HOST IS READY A GOTO $ BCF CTS ; TRIGGER 16 BYTE TRANSMISSION. 025A 22AE CALL TIMED_SERIAL_IN ; FETCH BYTES IF THEY ARE AVAILABLE.

15 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE B BSF CTS 025C 1CBC BTFSS BYTE_FLAG 025D 2A GOTO L E MOVF SERIAL_BYTE,W ; STORE NEW BYTE IN BUFFER. 025F MOVWF INDF A INCF FSR,F ; POINT TO NEXT BUFFER LOCATION AA INCF SERIAL_BUFFER_COUNTER,F ; COUNT BUFFER LOCATIONS MOVLW 16 ; FEST TO SEE IF BUFFER IS FULL XORWF SERIAL_BUFFER_COUNTER,W D BTFSS _Z A5A GOTO $ L2680: B MOVLW SERIAL_BUFFER ; POINT TO TOP OF BUFFER MOVWF FSR RETURN ; ; GET HEX BYTE ; ~~~~~~~~~~~~ ; GET HEX BYTE READS TWO BYTES FROM THE SERIAL BUFFER. IT CALLS FETCH BYTE AND, BEFORE CONVERTING THE ; ASCII CHARACTER TO HEX,IT CHECKS THAT A VALID BYTE WAS RECEIVED. IF THE BYTE WAS NOT VALID, A RETURN ; IS EXECUTED WITH THE BYTE ERROR BIT SET. IF THE BYTE WAS VALID, FETCH BYTE IS CALLED AGAIN. A VALID ; HEX BYTE IS RETURNED IN HEX_ WITH BYTE ERROR CLEAR. AS BEFORE, IF THE BYTE WAS INVALID, BYTE ; ERROR IS SET GET_HEX_BYTE: C BSF BYTE_ERROR ; BIT IS SET IN ANTICIPATION OF AN ERROR. 026A CALL FETCH_BYTE ; READ FIRST FROM SERIAL BUFFER. 026B 1C3C BTFSS BUFFER_FLAG 026C RETURN ; ERROR FOUND, INVALID BYTE. 026D 22C CALL ASCII_BINARY ; BYTE VALID, CONVERT IT TO BINARY. 026E 00A MOVWF HEX_ 026F 0EA SWAPF HEX_,F CALL FETCH_BYTE C3C BTFSS BUFFER_FLAG RETURN ; INVALID BYTE C CALL ASCII_BINARY A IORWF HEX_,F C BCF BYTE_ERROR ; INDICATE VALID BYTE RETURN ; ; SET MODE ; ~~~~~~~~ SET_MODE: CA MOVWF MODE ; SAVE MODE C MOVLW STEP_1 ; VCC ON, RST AND XTAL1= MOVWF PORTD 027A 22DA CALL DELAY_10MS B MOVLW STEP_2 ; RST/VPP AND P3.2/PROG="H". 027C MOVWF PORTD 027D 22DA CALL DELAY_10MS E MOVLW SIGNATURE_MODE 027F 064A XORWF MODE,W D BTFSS _Z A GOTO $ CALL PORTB_INPUT MOVLW SIGNATURE_MODE IORWF PORTD,F RETURN MOVLW READ_MODE A XORWF MODE,W D BTFSS _Z A8E GOTO $+5 028A CALL PORTB_INPUT 028B MOVLW READ_MODE 028C IORWF PORTD,F 028D RETURN E MOVLW WRITE_MODE 028F 064A XORWF MODE,W D BTFSS _Z A9A GOTO $ D CALL PORTB_OUTPUT MOVLW WRITE_MODE IORWF PORTD,F DA CALL DELAY_10MS F MOVLW 3FH ; RST TO +12V ANDWF PORTD,F DA CALL DELAY_10MS RETURN A MOVLW ERASE_MODE 029B 064A XORWF MODE,W 029C 1D BTFSS _Z 029D 2AA GOTO $+5 029E 233D CALL PORTB_OUTPUT 029F MOVLW ERASE_MODE 02A IORWF PORTD,F

16 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE 16 02A RETURN A2 300C MOVLW LOCK_MODE_2 02A3 064A XORWF MODE,W 02A4 1D BTFSS _Z 02A5 2AAA GOTO $+5 02A6 233D CALL PORTB_OUTPUT 02A7 300C MOVLW LOCK_MODE_2 02A IORWF PORTD,F 02A RETURN AA 233D CALL PORTB_OUTPUT 02AB 301C MOVLW LOCK_MODE_1 02AC IORWF PORTD,F 02AD RETURN ; ; TIMED SERIAL IN ; ~~~~~~~~~~~~~~~ ; TIMER 1 IS CONFIGURED TO PROVIDE A 142 MILLISECOND DELAY. TIMED SERIAL IN RESTARTS TIMER 1, WAITS FOR ; TIMEOUT OR FOR A SERIAL INPUT. BYTE FLAG IS SET ACCORDING TO THE RESULTS AE TIMED_SERIAL_IN: AE BCF T1CON,TMR1ON ; STOP TIMER 1. 02AF 100C BCF PIR1,TMR1IF ; RESET TIMER 1. 02B0 018F CLRF TMR1H 02B1 018E CLRF TMR1L 02B BSF T1CON,TMR1ON ; START TIMER 1. 02B3 180C BTFSC PIR1,TMR1IF ; CHECK FOR TIMEOUT. 02B4 2ABB GOTO $+7 ; TIMER 1 TIMEOUT. 02B5 1E8C BTFSS PIR1,RCIF ; CHECK FOR SERIAL INPUT. 02B6 2AB GOTO $-3 ; KEEP TESTING FOR TIMEOUT AND SERIAL INPUT. 02B7 081A MOVF RCREG,W ; SERIAL INPUT FOUND. 02B8 00A MOVWF SERIAL_BYTE 02B9 14BC BSF BYTE_FLAG 02BA RETURN 02BB 10BC BCF BYTE_FLAG ; TIMER ONE TIMED OUT BEFORE SERIAL BYTE ARRIVED. 02BC RETURN ; ; MINOR SUBROUTINES ; BD ALL_OFF: 02BD 30F MOVLW 0F8H ; MASK ALL LED OUTPUTS. 02BE ANDWF PORTC,F ; SWITCH OFF RED, GREEN AND BLUE LEDS. 02BF RETURN ; C ASCII_BINARY: 02C0 083D MOVF BUFFER_BYTE,W 02C1 3EBF ADDLW -41H 02C2 1C BTFSS _C 02C3 3E ADDLW 7 02C4 3E0A ADDLW 10 02C RETURN ; C BLANK_SPACE: 02C6 1E0C BTFSS PIR1,TXIF 02C7 2AC GOTO $-1 02C MOVLW " " 02C MOVWF TXREG 02CA RETURN ; CB BLUE_ON: 02CB BCF RED 02CC BCF GREEN 02CD BSF BLUE 02CE RETURN ; ; CONVERT HEX2ASC ; ~~~~~~~~~~~~~~~ ; CONVERT HEX2ASC DOES THE ACTUAL CONVERSION FOR HEX_TO_ASCII, RETURNING WITH THE RESULT IN W CF CONVERT_HEX2ASC: CF 390F ANDLW 0FH ; MASK UPPER NYBBLE. 02D0 3E ADDLW 6 02D BTFSC _DC 02D2 3E ADDLW 'A'-('9'+1) 02D3 3E2A ADDLW '0'-6 ; RESULT IS IN W. 02D RETURN ;

17 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE 17 02D DASH: 02D5 1E0C BTFSS PIR1,TXIF 02D6 2AD GOTO $-1 02D7 302D MOVLW "-" 02D MOVWF TXREG 02D RETURN ; DA DELAY_10MS: 02DA MOVLW 32H 02DB 00A MOVWF D1 02DC MOVLW 8 02DD 00A MOVWF D2 02DE DELAY_10MS_0: 02DE 0BA DECFSZ D1,F 02DF 2AE GOTO $+2 02E0 0BA DECFSZ D2,F 02E1 2ADE GOTO DELAY_10MS_0 02E2 2AE GOTO $+1 02E RETURN ; E DELAY_1MS: 02E4 30B MOVLW 0B7H 02E5 00A MOVWF D1 02E MOVLW 1 02E7 00A MOVWF D2 02E DELAY_1MS_0: 02E8 0BA DECFSZ D1,F 02E9 2AEB GOTO $+2 02EA 0BA DECFSZ D2,F 02EB 2AE GOTO DELAY_1MS_0 02EC 2AED GOTO $+1 02ED RETURN ; EE DELAY_1S: 02EE MOVLW 47H ; ONE SECOND DELAY. 02EF 00A MOVWF D1 02F MOVLW 3 02F1 00A MOVWF D2 02F MOVLW 3 02F3 00A MOVWF D3 02F DELAY_1SEC: 02F4 0BA DECFSZ D1,F 02F5 2AF GOTO $+2 02F6 0BA DECFSZ D2,F 02F7 2AF GOTO $+2 02F8 0BA DECFSZ D3,F 02F9 2AF GOTO DELAY_1SEC 02FA 2AFB GOTO $+1 02FB 2AFC GOTO $+1 02FC 2AFD GOTO $+1 02FD RETURN ; FE DELAY_30S: 02FE 301E MOVLW 30 ; WAIT FOR 30 SECONDS. 02FF 00BB MOVWF THIRTY_SEC_DELAY EE CALL DELAY_1S MOVLW XORWF PORTC,F BBB DECFSZ THIRTY_SEC_DELAY,F B GOTO $ RETURN ; DELAY_500US: MOVLW 98H A MOVWF D DELAY_500: BA DECFSZ D1,F B GOTO DELAY_ A RETURN ; B DRAW_LINE: 030B MOVLW C 00A MOVWF BYTE_COUNT 030D 22D CALL DASH 030E 0BA DECFSZ BYTE_COUNT,F 030F 2B0D GOTO $ RETURN ; ; EMPTY BUFFER ; ~~~~~~~~~~~~ ; EMPTY BUFFER IS USED TO CLEAR THE BUFFER AFTER AN ERROR.

18 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE EMPTY_BUFFER: BCF CTS ; READ BYTES FROM BUFFER UNTIL IT IS EMPTY AE CALL TIMED_SERIAL_IN BC BTFSC BYTE_FLAG B GOTO $ BSF CTS B MOVLW SERIAL_BUFFER ; RE-INITIALISE BUFFER MOVWF FSR A CLRF SERIAL_BUFFER_COUNTER RETURN ; A GREEN_ON: 031A BCF RED 031B BSF GREEN 031C BCF BLUE 031D RETURN ; ; HEX TO ASCII ; ~~~~~~~~~~~~ ; HEX TO ASCII CONVERTS THE HEXADECIMAL BYTE IN ASCII_CHAR_HI TO TWO ASCII CHARACTERS, RETURNING THEM IN ; ASCII_CHAR_HI AND ASCII_CHAR_LO E HEX_TO_ASCII: E 0E SWAPF ASCII_CHAR_HI,W 031F 22CF CALL CONVERT_HEX2ASC XORWF ASCII_CHAR_HI,W C XORWF ASCII_CHAR_HI,F XORWF ASCII_CHAR_HI,W CF CALL CONVERT_HEX2ASC C MOVWF ASCII_CHAR_LO RETURN ; INCREMENT_ADDRESS: AAA INCF ADDRESS_LO,F ;INCREMENT RECORD ADDRESS BTFSC _Z AA INCF ADDRESS_HI,F RETURN ; A INCREMENT_ADDRESS_COUNTER: 032A BSF XTAL1 032B 2B2C GOTO $+1 032C 2B2D GOTO $+1 032D BCF XTAL1 032E RETURN ; F INCREMENT_MASTER_ADDRESS: 032F 0AC INCF MASTER_ADDR_LO,F BTFSC _Z AC INCF MASTER_ADDR_HI,F RETURN ; LF: E0C BTFSS PIR1,TXIF B GOTO $ A MOVLW 0AH MOVWF TXREG RETURN ; PORTB_INPUT: BSF _RP0 ; BANK FF MOVLW 0FFH ; PORTB - INPUTS - WEAK PULL-UPS. 033A MOVWF TRISB 033B BCF _RP0 ; BANK C RETURN ; D PORTB_OUTPUT: 033D CLRF PORTB ; ALL PINS LOW. 033E BSF _RP0 ; BANK F CLRF TRISB ; ALL PINS OUTPUT BCF _RP0 ; BANK RETURN ; ; POWER DOWN ; ~~~~~~~~~~

19 MPASM 5.46 AT89C2051_PROGRAMMER.ASM :21:50 PAGE ; POWER DOWN REMOVES POWER FROM THE PROGRAMMING SOCKET IN ACCORDANCE WITH INSTRUCTION 10 OF THE ; PROGRAMMING ALGORITHM FOR THE AT89C POWER_DOWN: BCF XTAL BSF VPP_OFF E MOVLW 0E0H MOVWF PORTD D CALL PORTB_OUTPUT RETURN ; RED_ON: BSF RED BCF GREEN 034A BCF BLUE 034B RETURN ; ; SEND HEX BYTES ; ~~~~~~~~~~~~~~ C SEND_HEX_BYTES: 034C 00C MOVWF ASCII_CHAR_HI 034D 231E CALL HEX_TO_ASCII 034E MOVF ASCII_CHAR_HI,W 034F 00A MOVWF SERIAL_BYTE A CALL SERIAL_OUT MOVF ASCII_CHAR_LO,W A MOVWF SERIAL_BYTE A CALL SERIAL_OUT RETURN ; SERIAL_IN: E8C BTFSS PIR1,RCIF ; WAIT FOR SERIAL INPUT B GOTO $ A MOVF RCREG,W ; FETCH AND STORE SERIAL BYTE A MOVWF SERIAL_BYTE RETURN ; A SERIAL_OUT: 035A 1E0C BTFSS PIR1,TXIF ; WAIT FOR TX BUFFER TO EMPTY. 035B 2B5A GOTO $-1 035C MOVF SERIAL_BYTE,W 035D MOVWF TXREG 035E RETURN ; F START_TIMER_2: 035F 108C BCF PIR1,TMR2IF ; CLEAR INTERRUPT FLAG CLRF TMR F MOVLW 7FH ; TIMER 2, POSTSCALER 1:16, PRESCALER 1: MOVWF T2CON RETURN ; TOGGLE_BLUE: C8C BTFSS PIR1,TMR2IF ; TIMEOUT? B GOTO $+4 ; NOT YET C BCF PIR1,TMR2IF ; CLEAR INTERRUPT FLAG MOVLW 4 ; TOGGLE BLUE LED XORWF PORTC,F RETURN ; A TOGGLE_RED: 036A 1C8C BTFSS PIR1,TMR2IF ; TIMEOUT? 036B 2B6F GOTO $+4 ; NOT YET. 036C 108C BCF PIR1,TMR2IF ; CLEAR INTERRUPT FLAG. 036D MOVLW 1 ; TOGGLE RED LED. 036E XORWF PORTC,F 036F RETURN ; WAIT_PROG: E CALL DELAY_1MS E CALL DELAY_1MS RETURN ; ; ; \/ / / / \ / / ; \/ _ \ \ \ / _ \ _ _ \ \ ; ) ) / \ _ ) ; _ _ / /_/ \_\ /