La clé pour la serrure
Description
Et oui dans une serrure il faut une clé
http://perso.wanadoo.fr/pat.deaubonne/DOWNLOAD/Serrure_A_WaferCard/CleCard.asm.txt
Source / Exemple :
;*****************************************************************
;
; TITLE "CLECARD.ASM"
; LIST P=16f84
; crer le : 15/06/2000
; par : Deaubonne Patrick
; modifier le : 13/08/2001
; par : Deaubonne Patrick
;*****************************************************************
opt list
device pic16f84
config CP=off,OSC=xt
1 EQU 1
IO_PIN EQU 007H ;SET INPUT / OUTPUT PIN
IO_MASK EQU 07FH
INDIR EQU 00H ; Indirect pointer
RTCC EQU 01H ; Real time clock / counter
PCL EQU 02H ; Program counter low byte
STATUS EQU 03H ; Status register
CY EQU 0 ; Carry/borrow bit
DC EQU 1 ; Digit carry
Z EQU 2 ; Zero flag
PD EQU 3 ; Power down
T0 EQU 4 ; Time-out bit
RP0 EQU 5 ; Register page select bits
RP1 EQU 6 ; Not used in 16C84
RP2 EQU 7 ; Not used in 16C84
FSR EQU 04H ; Indirect pointer
PORTA EQU 05H ; PORT A
PORTB EQU 06H ; PORT B
EEDATA EQU 08H ; Eeprom data
EEADR EQU 09H ; Eeprom address
PCLATH EQU 0AH ; Program counter high byte
INTCON EQU 0BH ; Interrupt control
GIE EQU 07H ; global interrupt enable bit
RBIE EQU 03H ; Timer 0 interrupt enable bit
TMR0 EQU 05H ; Timer 0 interrupt enable bit
; if picasm doesn't like 08?H for register addresses (TRISA/B EECON1/2)
; change to 05H, 06H, 08H and 09H :
OPTION_REG EQU 01H
TRISA EQU 05H ; Data direction port A
TRISB EQU 06H ; Data direction port B
EECON1 EQU 08H ; Eeprom control
EECON2 EQU 09H ; Eeprom control
RD EQU 0 ; eeprom rd bit
WR EQU 1 ; eeprom wr bit
WREN EQU 2 ; eeprom wr enable bit
WRERR EQU 3 ; eeprom ....
EEIF equ 4 ; eeprom ....
W EQU 0 ; W reg. as destination
F EQU 1 ; F file as destination
; TMP 1 equ 0CH ; reg 0ch tmp
BITCNT equ 0DH ; bit#
ADDRL equ 3EH ; eeprom address
ADDRH equ 3FH ; eeprom address
RCVSTAT equ 10H ; RCVSTAT bit 0:= last byte to tx
; bit 1:= last byte to rx
ADR equ 11H
tmp equ 15H
MYDAT equ 12H
SDATA EQU 4 ;SERIAL EEPROM DATA LINE
SCLK EQU 5 ;SERIAL EEPROM CLOCK LINE
CLK equ 6 ; CLK pic
SDA equ 7 ; SDA pic
BUF equ 16h
tmp1 equ 37h
tmp2 equ 38h
ORG 000H
;-----------------------------------------------------------------------------
; Program Start Send Atr and Read data from decoder
;-----------------------------------------------------------------------------
START
goto MyStart
nop
nop
nop
retfie
retfie
retfie
retfie
GetTyp
retlw 2
GetUser
retlw 0
Mystart
clrf PORTA
clrf PORTB
bsf STATUS,RP0 ; bank 1 acces
TRISA
movlw 0x10
TRIS PORTA
INTXX
bcf INTCON,GIE ; disable all interrupts
; bcf INTCON,TMR0 ; disable Timer interrupts
; bcf INTCON,RBIE ; disable Timer interrupts
clrf INTCON
movlw 0xcf
TRIS portb ;
movlw 0x7f
movwf OPTION_REG
bcf OPTION_REG,7
bcf STATUS,RP0
SLOOP ; read until controlbyte 0xa* is received
clrf ADDRH
call GetTyp ; Lit le No du type
movwf ADDRL ; sauve dans adresse basse
bcf status,cy ; efface la retenue
rlf ADDRL,f ; x2
rlf ADDRH,f
rlf ADDRL,f ; x4
rlf ADDRH,f
rlf ADDRL,f ; x8
rlf ADDRH,f
movlw BUF
movwf FSR
clrf adr
call Nextline
goto fin
NextLine
call BSTOP
call ReadLine
call writeBuf
fin
call BSTOP ; send BSTOP
movlw 0x4F
tris portb
SendKey
SendLoop3
movlw 128 ; tempo 128 boucle
movwf tmp1
BSF PORTB,SDA ; set data
SendLoop3a
; tempo Data haut de 128 boucles
decfsz tmp1,f
goto SendLoop3a
; Adresse buffer
movlw BUF
; adressage indirect
movwf FSR
; 8 caractres
transmettres
movlw 8
movwf tmp
SendLoop1
movlw 32
movwf tmp1
BSF PORTB,SDA ; set data
SendLoop1a
; tempo Data haut de 32 boucles
decfsz tmp1,f
goto SendLoop1a
; 8 bits par caractres
movlw 8
movwf tmp1
movf indir,w
movwf tmp2
incf FSR,f
; stzrt bit
BCF PORTB,SDA ; set data low for this bit
nop
nop
nop
nop
nop
nop
nop
BSF PORTB,SDA ; set data low for this bit
nop
nop
nop
nop
nop
nop
nop
SendLoop2
rlf tmp2,f
btfsc status,cy
BSF PORTB,SDA ; set data high for this bit
btfss status,cy
BCF PORTB,SDA ; set data low for this bit
decfsz tmp1,f
goto SendLoop2
decfsz tmp,f
goto SendLoop1
goto SendKey
forever
BCF PORTB,SDA ; set data low for ever
goto forever
ReadLine:
RDNEXT ; ;do { /* only max 16 byte page write */
movf ADDRL,w
call READ_EE ; read from eeprom
movf EEDATA,w
movwf INDIR
incf FSR,f
RDNEXT2
call RX ; read from eeprom
movf EEDATA,w
movwf INDIR
incf FSR,f
decfsz tmp,f
goto RDnext2
goto BSTOP ; send BSTOP
;movf EEDATA,w
;movwf MyDat
;clrf ADR
;call WritePicEEPROM
;incf ADR,f
;movf Indir,w
;movwf MyDat
;call WritePicEEPROM
;goto fin
writeBuf:
movlw Buf
writeBuf3
movwf FSR
MOVLW 8
movwf tmp
writeBuf2:
movf INDIR,w
movwf MyDat
call WritePicEEPROM
incf ADR,f
incf FSR,f
decfsz tmp,f
goto writebuf2
bsf 3,5 ; Bank 1
bcf 0bH, 7 ; Disable INTs.
bcf 3,5 ; Bank 0
return
writePicEEPROM
bcf 3, 5 ; Bank 0
movf MYDAT,W
movwf 8 ; EEDATA=W
movf ADR,W
movwf 9 ; Address to read
bsf 3,5 ; Bank 1
bcf 8, 4 ; clear EE int flag
bcf 0bH, 7 ; Disable INTs.
bsf 8, 2 ; Enable Write
movlw 055h ;
movwf 9 ; Write 55h
movlw 0AAh ;
movwf 9 ; Write AAh
bsf 8, 1 ; Set WR bit, Begin Write
bsf 0bH, 7 ; Enable INTs
btfsc 8, 1 ; Test End write
goto $-1 ; loop while not end
bcf 8, 2 ; Disable Write
bcf 3,5 ; Bank 0
return
;
; following code borrowed from multi215.asm +
; - read modified to do sequential read
;
;######################################################
; EEPROM READ ROUTINE
;######################################################
; Used reg: EEADR, EEDATA,RCVSTAT,W
; IN : W= READ ADRESS
; OUT : W= BYTE
READ_EE MOVWF EEADR ; store byte in reg EEADR
READ_EE_DIR CALL BSTART ; generate start bit
BCF STATUS,CY ; WRITE SEQUENCE
CALL CONTROL_BYTE ; CALC CONTROL BYTE AND TRANSMIT
MOVF EEADR,W ; get word address....
READ_EE1 CALL TX ; and send it
READ_CURRENT CALL BSTART ; generate start bit
BSF STATUS,CY ; READ SEQUENCE
CALL CONTROL_BYTE ; CALC CONTROL BYTE AND TRANSMIT
CALL RX ; read 1 byte from serial EE
; btfsc RCVSTAT,1 ; if lastbyte then
; CALL BSTOP ; send stop bit to end transmission
; MOVF EEDATA,W ; GET RECEIVED BYTE
RETURN
;
;**********************************************
; GENERATE CONTROL BYTE
;**********************************************
CONTROL_BYTE RLF ADDRH,W ; => CY=1
ANDLW B'00001111' ;MASK OUT UPPER NIBBLE
IORLW B'10100000' ;COMPLETE BYTE 1010AAAD
;A=ADRESS D=DIRECTION
;SEND CONTROL BYTE
;**********************************************
; TRANSMIT DATA SUBROUTINE
;**********************************************
TX MOVWF EEDATA ;STORE BYTE TO TX
MOVLW B'11001111' ; set data,clock as outputs
TRIS PORTB
CALL TX4 ;TRANSMIT 8 TIMES
CALL TX4
GOTO BITIN
TX4 CALL TXLP
CALL TXLP
CALL TXLP
TXLP RLF EEDATA,F ; ROTATE BIT TO CARRY
GOTO BITOUT_R ; send the bit to serial EE
;**********************************************
; RECEIVE DATA SUBROUTINE
;**********************************************
RX MOVLW B'11011111' ; make SDATA an input line/SCLK = OUT
; Call MyTrisb
TRIS PORTB
CALL RX4
CALL RX4
btfss RCVSTAT,1 ; if not last byte then
bcf STATUS,CY ; set Ack=0
btfsc RCVSTAT,1 ; else
BCF STATUS,CY ; SET ACK BIT=1
GOTO BITOUT ; TO FINISH TRANSMISSION
RX4 CALL RXLP
CALL RXLP
CALL RXLP
RXLP CALL BITIN_R ; READ A BIT
RLF EEDATA,F ; SHIFT CARRY TO BYTE
RETURN
;*********************************************
; START BIT SUBROUTINE
;*********************************************
BSTART BSF PORTB,SDATA ; make sure data is high
MOVLW B'11001111'
TRIS PORTB ; set data and clock lines for output
BSF PORTB,SCLK ; set clock high
NOP
BCF PORTB,SDATA ; data line goes low during
NOP
GOTO BC_END ; high clock for start bit
;**********************************************
; STOP BIT SUBROUTINE
;**********************************************
BSTOP BCF PORTB,SDATA ; make sure data line is low
MOVLW B'11001111'
TRIS PORTB ; set data/clock lines as outputs
NOP
BSF PORTB,SCLK ; set clock high
NOP
BSF PORTB,SDATA ; data goes high while clock high
; for stop bit
B_END NOP
BC_END BCF PORTB,SCLK ; set clock low again
RETURN
;**********************************************
; BITOUT ROUTINE , SEND BIT WHEN CARRY SET
;**********************************************
BITOUT MOVLW B'11001111' ; set data,clock as outputs
; Call MyTrisb
tris PORTB
BITOUT_R BTFSS STATUS,CY ; check for state of data bit to xmit
BcF PORTB,SDATA ; set data line low
BTFSc STATUS,CY
BsF PORTB,SDATA ; high? set data line high
CLKOUT BSF PORTB,SCLK ; set clock line high
GOTO B_END
;**********************************************
; BITIN ROUTINE
;**********************************************
BITIN MOVLW B'11011111' ; make SDATA an input line/SCLK = OUT
; Call MyTrisb
tris PORTB
bcf OPTION_REG,7 ; make sure weak pull-up is on
BITIN_R BSF PORTB,SCLK ; set clock line high
NOP
BSF STATUS,CY ; assume input bit is high
BTFSS PORTB,SDATA ; read the data bit
BCF STATUS,CY ; input bit was low ,clear CARRY
NOP
GOTO BC_END
MyTrisB
bsf 3,5
tris 06
bcf 3,5
return
END
Conclusion :
http://perso.wanadoo.fr/pat.deaubonne/DOWNLOAD/Serrure_A_WaferCard/CleCard.asm.txt
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