// watch external clock for PWM messages
// specify minimum gap to look for in us
void sniff_pwm(unsigned int min)
{
BOOL toggle;
BOOL abort= FALSE;
unsigned long i, count, pulsecount= 0L, gaps[DETECT_BUFFER_SIZE], pulses[DETECT_BUFFER_SIZE];
// make sure local clock isn't running & switch to input
stop_HW_clock();
COIL_MODE_READER();
READER_CLOCK_ENABLE_OFF(LOW);
toggle= SNIFFER_COIL;
// wait for 100 ticks to make sure we're settled
toggle= SNIFFER_COIL;
while(count < 100)
{
while(SNIFFER_COIL == toggle)
// check for user abort
if(get_user_abort())
return;
++count;
toggle= !toggle;
}
// watch for gaps / pulses
i= 0;
GetTimer_us(RESET);
while(!abort)
{
while(SNIFFER_COIL == toggle)
// check for user abort
if((abort= get_user_abort()))
break;
toggle= !toggle;
count= GetTimer_us(RESET);
// check if it was a gap
if(count > min)
{
pulses[i]= pulsecount;
gaps[i++]= count;
pulsecount= 0L;
}
else
pulsecount += count;
if(i == DETECT_BUFFER_SIZE)
{
decode_pwm(pulses, gaps, i);
i= 0;
}
}
decode_pwm(pulses, gaps, i);
}
// try to find values that correctly transmit all commands to t55x7
// so that a GET_UID command will return a true value
BOOL t55x7_rwd_test(BYTE *pattern)
{
BYTE gap, one, zero, i, tmp[T55X7_BLOCKSIZE * 2 + 1];
BOOL found= FALSE;
// min/max from datasheets
for(one= 48 ; one <= 63 ; ++one)
for(zero= 16; zero <= 31 ; ++zero)
for(gap= 8 ; gap <= 30 ; ++gap)
{
if(get_user_abort())
return found;
RFIDlerConfig.RWD_Gap_Period= gap;
RFIDlerConfig.RWD_One_Period= one;
RFIDlerConfig.RWD_Zero_Period= zero;
if(get_tag_uid(tmp))
{
UserMessageNum(" gap: %d", gap);
UserMessageNum(" one: %d", one);
UserMessageNum(" zero: %d", zero);
UserMessage(" UID: %s\r\n", tmp);
found= TRUE;
}
}
UserMessage("%s", "\r\n");
return found;
}
// attempt to find ideal parameters for GAP, ZERO and ONE periods.
// ranges specified in FC
void hitag2_test_rwd(unsigned int gapmin, unsigned int gapmax, unsigned int zeromin, unsigned int zeromax, unsigned int onemin, unsigned int onemax, BYTE *pass)
{
BYTE i, imax, countu, counta, countr;
unsigned int gap, zero, one, fc;
imax= 5;
for(fc= 800 ; fc <= 809 ; ++fc)
{
for(gap= gapmin ; gap <= gapmax ; ++gap)
for(zero= zeromin ; zero <= zeromax ; ++zero)
for(one= onemin ; one <= onemax ; ++one)
{
RFIDlerConfig.FrameClock= (unsigned long) fc;
RFIDlerConfig.RWD_Gap_Period= gap;
RFIDlerConfig.RWD_Zero_Period= zero;
RFIDlerConfig.RWD_One_Period= one;
UserMessageNum("\rGap %d", gap);
UserMessageNum(" Zero %d", zero);
UserMessageNum(" One %d", one);
UserMessageNum(" FC %d", fc);
for(i= countu= counta= countr= 0 ; i < imax ; ++i)
{
if(get_user_abort())
return;
if(hitag2_get_uid(DataBuff))
{
++countu;
if(hitag2_pwd_auth(DataBuff, pass) || hitag2_crypto_auth(DataBuff, pass))
{
++counta;
if(hitag2_read_page(DataBuff, 0))
++countr;
}
}
}
if(countu == imax && counta == imax && countr == imax)
{
UserMessageNum(" - got %d", countu);
UserMessageNum(" uids, %d", counta);
UserMessageNum(" auths %d", countr);
UserMessageNum(" reads, out of %d attempts.\r\n", imax);
}
}
UserMessage("%s", "\r\n");
}
}
// try to find values that correctly transmit all commands to q5
// to test this properly, q5 should have invalid data in it's data blocks
// so that only a GET_TRACE_DATA command will return a true value
BOOL q5_rwd_test(BYTE *pattern)
{
BYTE start_gap, gap, one, zero, i, tmp[Q5_BLOCKSIZE + 1];
BOOL found= FALSE, blank;
// min/max from datasheets
for(one= 48 ; one <= 63 ; ++one)
for(zero= 16; zero <= 31 ; ++zero)
for(gap= 10 ; gap <= 50 ; ++gap)
for(start_gap= 11 ; start_gap <= 50 ; ++start_gap)
{
RFIDlerConfig.Manchester= TRUE;
blank= TRUE;
if(get_user_abort())
return found;
RFIDlerConfig.RWD_Gap_Period= gap;
RFIDlerConfig.RWD_One_Period= one;
RFIDlerConfig.RWD_Zero_Period= zero;
// reset tag
get_tag_uid(tmp);
// try to switch off modulation
// send command with start gap: reset with sleep time set to start gap, and wake time set to 0 as we transmit the 1st bit immediately
// note that we must also subtract standard gap period as it will be added to the front of the first bit by default.
rwd_send(Q5_MODULATION_DEFEAT, strlen(Q5_MODULATION_DEFEAT), NO_RESET, BLOCK, RWD_STATE_START_SEND, RFIDlerConfig.FrameClock, start_gap - RFIDlerConfig.RWD_Gap_Period, 0, RFIDlerConfig.RWD_Zero_Period, RFIDlerConfig.RWD_One_Period, RFIDlerConfig.RWD_Gap_Period, RFIDlerConfig.RWD_Wait_Switch_TX_RX);
// read a block with no sync & no manchester - will be all '0' if not modulating
RFIDlerConfig.Manchester= FALSE;
if(read_ask_data(RFIDlerConfig.FrameClock, RFIDlerConfig.DataRate, tmp, RFIDlerConfig.DataBits, RFIDlerConfig.Sync, 0, RFIDlerConfig.Timeout, NO_ONESHOT_READ, HEX) == RFIDlerConfig.DataBits)
{
for(i= 0 ; i < HEXDIGITS(RFIDlerConfig.DataBits) ; ++i)
if(tmp[i] != '0')
blank= FALSE;
RFIDlerConfig.Manchester= TRUE;
if(blank && get_tag_uid(tmp) && q5_read_block(tmp, 0))
{
UserMessageNum("\r\nFound tag with start_gap %d", start_gap);
UserMessageNum(" gap %d", gap);
UserMessageNum(" one %d", one);
UserMessageNum(" zero %d", zero);
found= TRUE;
}
}
}
UserMessage("%s", "\r\n");
return found;
}
// try to find values that correctly transmit all commands to q5
// to test this properly, q5 should have invalid data in it's data blocks
// so that only a GET_TRACE_DATA command will return a true value
BOOL q5_rwd_test(BYTE *pattern)
{
BYTE gap, one, zero, tmp[Q5_BLOCKSIZE + 1];
BOOL found= FALSE, blank;
// min/max from datasheets
for(one= 48 ; one <= 63 ; ++one)
for(zero= 16; zero <= 31 ; ++zero)
for(gap= 10 ; gap <= 50 ; ++gap)
{
RFIDlerConfig.Manchester= TRUE;
blank= TRUE;
if(get_user_abort())
return found;
RFIDlerConfig.RWD_Gap_Period= gap;
RFIDlerConfig.RWD_One_Period= one;
RFIDlerConfig.RWD_Zero_Period= zero;
// reset tag
get_tag_uid(tmp);
// try to switch off modulation
rwd_send(Q5_MODULATION_DEFEAT, strlen(Q5_MODULATION_DEFEAT), NO_RESET, BLOCK, RWD_STATE_START_SEND, RFIDlerConfig.FrameClock, RFIDlerConfig.RWD_Gap_Period, 0, RFIDlerConfig.RWD_Zero_Period, RFIDlerConfig.RWD_One_Period, RFIDlerConfig.RWD_Gap_Period, RFIDlerConfig.RWD_Wait_Switch_TX_RX);
// read a block with no sync & no manchester - will be all '0' if not modulating
RFIDlerConfig.Manchester= FALSE;
if(read_ask_data(RFIDlerConfig.FrameClock, RFIDlerConfig.DataRate, tmp, RFIDlerConfig.DataBits, RFIDlerConfig.Sync, 0, RFIDlerConfig.Timeout, NO_ONESHOT_READ, HEX) == RFIDlerConfig.DataBits)
{
if(strcmp(tmp, "0000000000000000") != 0)
blank= FALSE;
RFIDlerConfig.Manchester= TRUE;
if(blank && get_tag_uid(tmp) && q5_read_block(tmp, 0))
{
UserMessageNum("\r\nFound tag with gap %d", gap);
UserMessageNum(" one %d", one);
UserMessageNum(" zero %d", zero);
found= TRUE;
}
}
}
UserMessage("%s", "\r\n");
return found;
}
