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Kasper
Joined: 14 Jan 2004
Posts: 88
Location: Aurora, Ontario, Canada
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| HCS300 Keeloq encoder problem |
 Posted: Tue Feb 17, 2004 2:06 pm |
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Hi.
I am trying to program the Microchip HCS300 Keeloq encoder with the unique serial number, manufactures code etc to make it work with the HCS515 decoder, which I now think I have working (hard to tell without a working encoder)
Thanks in advance to any and all suggestions, and I appologize for the long post.
Kasper
PCM 3.184, MPLAB 6.4 ICD2 WinXP SP1
I have the HCS300 hooked up to a PIC16F877, which receives the codeword and serial number from a PC to program into the chip.
HCS300 -> PIC16F877
S2 -> Porta,0
PWM -> Porta,1
VCC -> Porta,2
http://www.microchip.com/1010/pline/security/keysecat/encoders/devices/hcs300/index.htm
I found this application note AN217 [url] http://www.microchip.com/1010/suppdoc/appnote/all/an217/index.htm
[/url] which seems to do pretty much what I need it to. The relevant section about programming and verifying is this:
Programming:
| Code: |
M_PROG_INIT bcf DATA ; DATA=0
bcf CLK ; CLK=0
bsf HCSVDD ; HCS POWER ON
BANK1
movlw K_MASKPA_PROG
movwf TRISA
BANK0
call WAIT_16MSEC
M_PROG_SETUP bsf CLK ; DATA=0, CLK=1
movlw Tps ; WAIT Program mode Setup Time (Tps)
call WAIT_WMSEC
bsf DATA ; DATA=1, CLK=1
movlw Tph1 ; WAIT Program Hold Time 1 (Tph1)
call WAIT_WMSEC
bcf DATA ; DATA=0, CLK=1
movlw Tph2 ; WAIT Program Hold Time 2 (Tph2)
call WAIT_uS
M_PROG_BULK_ER bcf CLK ; DATA=0, CLK=0
movlw Tpbw ; WAIT Program Bulk Write Time (Tpbw)
call WAIT_WMSEC
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which I translated in C to:
| Code: |
#define TPS 4 // Program mode setup time TPS 3.5 4.5 ms
#define TPH1 4 // Hold time 1 TPH1 3.5 — ms
#define TPH2 62 // Hold time 2 TPH2 50 — us
#define TCLKH 62 // Clock high time TCLKH 50 — us
#define TCLKL 62 // Clock low time TCLKL 50 — us
#define TWC 60 // Program cycle time TWC 50 — ms
#define TBPW 5 // Bulk Write time TPBW 4.0 — ms
Count16 = 0;
output_low(CLK);
output_low(DATA);
output_high(VCC);// powers on the HCS300
delay_ms(16);
output_high(CLK);
delay_ms(TPS);
output_high(DATA);
delay_ms(TPH1);
output_low(DATA);
delay_us(TPH2);
output_low(CLK);
delay_ms(TBPW);
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.. So far so good.. as far as I can tell I create the correct waveform for erasing the HCS300 to enter program mode.
Last edited by Kasper on Tue Feb 17, 2004 2:15 pm; edited 1 time in total |
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Kasper
Joined: 14 Jan 2004
Posts: 88
Location: Aurora, Ontario, Canada
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| Posted: Tue Feb 17, 2004 2:10 pm |
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Continued from above
for shifting out the data to the HCS300, they had the following code:
| Code: |
;--------------- ; CLOCK INTO HCS THE WORDS TO BE PROGRAMMED
clrf TMP_CNT ; NUMBER OF WORD TRASMITTED
movlw WORD0 ; SET INDIRECT PONTER TO INIT EE MAP
movwf FSR
M_NEW_WORD call PREPARE_WRD
;--------------- ; OUTPUT WORD ROTATE
clrf TXNUM ; NUMBER OF BIT TRASMITTED FOR EACH WORD
M_TX_BIT bsf CLK ; CLK=1
clrc
rrf WRD_HI, F ; ROTATE BIT TO OUTPUT
rrf WRD_LO, F ; into CARRY FLAG
skpnc
goto M_PROG_DHI
nop
M_PROG_DLO bcf DATA ; DATA=0
goto M_PROG_BIT
M_PROG_DHI bsf DATA ; DATA=1
M_PROG_BIT movlw Tclkh
call WAIT_uS ; DELAY
bcf CLK ; CLK=0
movlw Tclkl
call WAIT_uS ; DELAY
;---------------
M_PROG_CHK_WORD incf TXNUM, F ; INCREMENT NUMBER OF BIT TRASMITTED
movlw .16 ; CHECK IF END OF WORD TRASMITTED (16 BITS)
xorwf TXNUM, W
skpz
goto M_TX_BIT ; TRASMIT NEXT BIT
;--------------- ; END OUTPUT WORD
M_END_WORD bcf DATA ; DATA=0
movlw Twc ; WAIT FOR WORD Write Cycle Time (Twc)
call WAIT_WMSEC
;---------------
M_CECHK_PRG_END incf TMP_CNT, F ; INCREMENT NUMBER OF WORD PROGRAMMED
movlw NUM_WRD ; CHECK NUMBER OF WORD TRASMITTED
xorwf TMP_CNT, W
skpz
goto M_NEW_WORD ; PROGRAM NEW WORD
;----------------------------------------------------------------------------------------
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which I have translated to
| Code: |
for(i=0;i<(192);i++) { //12 Words
output_high(CLK);
output_bit(DATA,shift_right(TXtemp,TXBufferSize,0)); // shifts out the data from the receiveBuffer
delay_us(TCLKH);
output_low(CLK);
delay_us(TCLKL);
if(Count16++ >= 16) { // every 16 bits shifted, wait a tad longer to let it write.
output_low(DATA);
Count16 = 0;
delay_ms(TWC);
}
} // end i for
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Kasper
Joined: 14 Jan 2004
Posts: 88
Location: Aurora, Ontario, Canada
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| sorry for the multiple posts. |
| Posted: Tue Feb 17, 2004 2:12 pm |
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Continued from above
then finally the verify routine
| Code: |
;----------------------------------------------------------------------------------------
; VERIFY ROUTINE
;----------------------------------------------------------------------------------------
M_VERIFY
BANK1
movlw K_MASKPA_VERI ; I/O TRISTATE FOR VERIFY
movwf TRISA
BANK0
clrwdt
movlw WORD0 ; SET INDIRECT POINTER TO INIT EE MAP
movwf FSR
clrf TMP_CNT ; NUMBER OF WORDS RECIVED
clrf TXNUM ; NUMBER OF BIT RECEIVED FOR EACH WORD
;---------------
M_VER_BITIN clrc ; RECIVE DATA BIT FROM HCS FOR VERIFY
btfsc DATA ; TEST and ROTATE RECEIVED BIT INTO WORD BUFFER
setc
rrf WRD_HI, F
rrf WRD_LO, F
incf TXNUM, F
movlw .16
xorwf TXNUM, W ; TEST IF RECEIVED A COMPLETE WORD
skpz
goto M_VER_CLKHI
;---------------
M_VERIFY_WORD movf WRD_LO, W ; 16th BIT RECIVED (WORD) -> VERIFY WORD
xorwf INDF, W
skpz
goto PROG_ERR ; WORD LOW VERIFY ERROR
incf FSR, F
movf WRD_HI, W
xorwf INDF, W
skpz
goto PROG_ERR ; WORD HIGH VERIFY ERROR
incf FSR, F
incf TMP_CNT, F
movlw NUM_WRD
xorwf TMP_CNT, W ; TEST IF RECEIVED ALL THE WORDS PROGRAMMED
skpnz
goto PROG_SUCCESS ; ALL 12 WORDS VERIFIED WITH SUCCESS
clrf TXNUM
;---------------
M_VER_CLKHI bsf CLK ; CLK=1
movlw Tclkh ; WAIT TIME CLOCK HIGH
call WAIT_uS
M_VER_CLKLO bcf CLK ; CLK=0
movlw Tclkl ; WAIT TIME CLOCK LOW
call WAIT_uS
goto M_VER_BITIN
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which I translated to:
| Code: |
output_float(DATA);
delay_ms(TWC);
// now for reading back:
for(i=0;i<(192);i++) {
shift_right(RXBuffer,txBufferSize,input(DATA)); // shifts in data from the keyloqq
output_high(CLK);
delay_us(TCLKH);
output_low(CLK);
delay_us(TCLKL);
}// end of for.
output_low(CLK);
output_low(DATA);
output_low(VCC);
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the problem is that I can never verify a chip... even though the signals going to it look perfect on the scope, the data which I can shift back from it is garbage. Does anyone have an idea what I should do to make this work? |
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Kasper
Joined: 14 Jan 2004
Posts: 88
Location: Aurora, Ontario, Canada
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| Posted: Tue Feb 17, 2004 3:05 pm |
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OK.. I am a dummy.. but I figured that posting the problem would make me solve it.
here is the complete write + verify routine, which works 
| Code: |
void WriteKeyloqq(void) {// now the array is filled with nasty ascii characters, which have to be converted to something useful
long int i;
int Count16;
for (i=0;i<TXBufferSize ;i++) {
TXBuffer[i] = (Ascii2Hex(Receivebuffer[i*2])<<4) | (Ascii2Hex(Receivebuffer[(i*2) + 1])); //(TXBufferSize-1)-i
}
Count16 = 0;
output_low(CLK);
output_low(DATA);
output_high(VCC);// powers on the HCS300
delay_ms(16);
output_high(CLK);
delay_ms(TPS);
output_high(DATA);
delay_ms(TPH1);
output_low(DATA);
delay_us(TPH2);
output_low(CLK);
delay_ms(TBPW);
/////////////////////////////////////////////////////////////
//this should enter the Keyloqq encoder in programming mode//
/////////////////////////////////////////////////////////////
for(i=0;i<(192);i++) { //12 Words
output_high(CLK);
output_bit(DATA,shift_right(TXBuffer,TXBufferSize,0)); // shifts out the data from the receiveBuffer
delay_us(TCLKH);
output_low(CLK);
delay_us(TCLKL);
if(Count16++ >= 15) { // every 16 bits shifted, wait a tad longer to let it write.
output_low(DATA);
Count16 = 0;
delay_ms(TWC);
}
} // end i for
//output_low(CLK);
//output_low(DATA);
output_float(DATA);
delay_ms(TWC);
// now for reading back:
for(i=0;i<(192);i++) {
shift_right(RXBuffer,txBufferSize,input(DATA)); // shifts in data from the keyloqq
output_high(CLK);
delay_us(TCLKH);
output_low(CLK);
delay_us(TCLKL);
}// end of for.
output_low(CLK);
output_low(DATA);
output_low(VCC);
//now spit out what was put in the receivebuffer.
for(i=0;i<(TXBufferSize);i++) {
printf("%X ",RXBuffer[i]);
RXBuffer[i] = 0;
}
output_high(BUZZER);
delay_ms(100);
output_low(BUZZER);
output_high(LED);
// taadaa.. the keyloqq device should now be programmed.. yay.. if not, it is the computer who is to test the data and reprogram.
}// end function
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