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CHG: removed some debug data

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CHG: reverted back to old crc imp.
This commit is contained in:
iceman1001 2016-09-29 14:46:12 +02:00
commit cb7902cdcd
2 changed files with 17 additions and 40 deletions
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53
armsrc/legicrf.c
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@ -221,7 +221,6 @@ void frame_sendAsReader(uint32_t data, uint8_t bits){
uint32_t starttime = GET_TICKS, send = 0;
uint16_t mask = 1;
uint8_t prngstart = legic_prng_count() ;
// xor lsfr onto data.
send = data ^ legic_prng_get_bits(bits);
@ -243,9 +242,7 @@ void frame_sendAsReader(uint32_t data, uint8_t bits){
BYTEx(data, 0),
BYTEx(data, 1),
BYTEx(send, 0),
BYTEx(send, 1),
prngstart,
legic_prng_count()
BYTEx(send, 1)
};
LogTrace(cmdbytes, sizeof(cmdbytes), starttime, sendFrameStop, NULL, TRUE);
}
@ -287,19 +284,15 @@ static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits) {
// calibrate the prng.
legic_prng_forward(2);
uint8_t prngstart = legic_prng_count() ;
data = lsfr = legic_prng_get_bits(bits);
//FIXED time between sending frame and now listening frame. 330us
// 387 = 0x19 0001 1001
uint32_t starttime = GET_TICKS;
//uint16_t mywait = TAG_FRAME_WAIT - (starttime - sendFrameStop);
//uint16_t mywait = 495 - (starttime - sendFrameStop);
if ( bits == 6) {
//WaitTicks( 495 - 9 - 9 );
WaitTicks( 475 );
} else {
//Dbprintf("x WAIT %d", mywait );
//WaitTicks( mywait );
WaitTicks( 450 );
}
@ -321,7 +314,6 @@ static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits) {
next_bit_at += TAG_BIT_PERIOD;
// We expect 42 edges == ONE
//if (edges > 20 && edges < 64)
if ( edges > 20 )
data ^= the_bit;
@ -332,15 +324,8 @@ static void frame_receiveAsReader(struct legic_frame * const f, uint8_t bits) {
f->data = data;
f->bits = bits;
uint8_t cmdbytes[] = {
bits,
BYTEx(data, 0),
BYTEx(data, 1),
BYTEx(data, 0) ^ BYTEx(lsfr, 0),
BYTEx(data, 1) ^ BYTEx(lsfr, 1),
prngstart,
legic_prng_count()
};
//log
uint8_t cmdbytes[] = {bits, BYTEx(data, 0), BYTEx(data, 1)};
LogTrace(cmdbytes, sizeof(cmdbytes), starttime, GET_TICKS, NULL, FALSE);
}
@ -413,26 +398,18 @@ static void switch_off_tag_rwd(void) {
}
// calculate crc4 for a legic READ command
// 5,8,10 address size.
static uint32_t legic4Crc(uint8_t legicCmd, uint16_t byte_index, uint8_t value, uint8_t cmd_sz) {
crc_clear(&legic_crc);
//uint32_t temp = (value << cmd_sz) | (byte_index << 1) | legicCmd;
//crc_update(&legic_crc, temp, cmd_sz + 8 );
crc_update(&legic_crc, 1, 1); /* CMD_READ */
crc_update(&legic_crc, byte_index, cmd_sz-1);
crc_update(&legic_crc, value, 8);
uint32_t temp = (value << cmd_sz) | (byte_index << 1) | legicCmd;
crc_update(&legic_crc, temp, cmd_sz + 8 );
return crc_finish(&legic_crc);
}
int legic_read_byte(int byte_index, int cmd_sz) {
uint8_t byte = 0; //, crc = 0, calcCrc = 0;
uint8_t byte = 0, crc = 0, calcCrc = 0;
uint32_t cmd = (byte_index << 1) | LEGIC_READ;
// (us)| ticks
// -------------
// 330 | 495
// 244 | 366
WaitTicks(366);
frame_sendAsReader(cmd, cmd_sz);
@ -440,13 +417,13 @@ int legic_read_byte(int byte_index, int cmd_sz) {
byte = BYTEx(current_frame.data, 0);
// calcCrc = legic4Crc(LEGIC_READ, byte_index, byte, cmd_sz);
// crc = BYTEx(current_frame.data, 1);
calcCrc = legic4Crc(LEGIC_READ, byte_index, byte, cmd_sz);
crc = BYTEx(current_frame.data, 1);
// if( calcCrc != crc ) {
// Dbprintf("!!! crc mismatch: expected %x but got %x !!!", calcCrc, crc);
// return -1;
// }
if( calcCrc != crc ) {
Dbprintf("!!! crc mismatch: expected %x but got %x !!!", calcCrc, crc);
return -1;
}
legic_prng_forward(4);
WaitTicks(40);
@ -535,9 +512,9 @@ int LegicRfReader(int offset, int bytes, int iv) {
isOK = 0;
goto OUT;
}
switch_off_tag_rwd();
if (bytes == -1)
bytes = card.cardsize;