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Some more docs, also made lf hid fskdemod a bit more stable. Should be no more false readings now

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This commit is contained in:
Martin Holst Swende 2014-10-25 22:42:27 +02:00
parent b225678574
commit 9cc8a1e588
1 changed files with 18 additions and 18 deletions
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36
armsrc/lfops.c
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@ -711,14 +711,11 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
size_t size=0,idx=0; //, found=0;
uint32_t hi2=0, hi=0, lo=0;
// Configure to go in 125Khz listen mode
LFSetupFPGAForADC(95, true);
while(!BUTTON_PRESS()) {
/** TODO! This should probably be moved outside the loop /Martin */
// Configure to go in 125Khz listen mode
LFSetupFPGAForADC(0, true);
WDT_HIT();
if (ledcontrol) LED_A_ON();
@ -727,7 +724,6 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
// FSK demodulator
size = fsk_demod(dest, size);
WDT_HIT();
// we now have a set of cycle counts, loop over previous results and aggregate data into bit patterns
// 1->0 : fc/8 in sets of 6
@ -748,7 +744,8 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
idx+=sizeof(frame_marker_mask);
while(dest[idx] != dest[idx+1] && idx < size-2)
{ // Keep going until next frame marker (or error)
{
// Keep going until next frame marker (or error)
// Shift in a bit. Start by shifting high registers
hi2 = (hi2<<1)|(hi>>31);
hi = (hi<<1)|(lo>>31);
@ -763,16 +760,20 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
}
//Dbprintf("Num shifts: %d ", numshifts);
// Hopefully, we read a tag and hit upon the next frame marker
if ( memcmp(dest+idx, frame_marker_mask, sizeof(frame_marker_mask)) == 0)
if(idx + sizeof(frame_marker_mask) < size)
{
if (hi2 != 0){
Dbprintf("TAG ID: %x%08x%08x (%d)",
(unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
}
else {
Dbprintf("TAG ID: %x%08x (%d)",
(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
if ( memcmp(dest+idx, frame_marker_mask, sizeof(frame_marker_mask)) == 0)
{
if (hi2 != 0){
Dbprintf("TAG ID: %x%08x%08x (%d)",
(unsigned int) hi2, (unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
}
else {
Dbprintf("TAG ID: %x%08x (%d)",
(unsigned int) hi, (unsigned int) lo, (unsigned int) (lo>>1) & 0xFFFF);
}
}
}
// reset
@ -809,11 +810,11 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
size_t size=0, idx=0;
uint32_t code=0, code2=0;
// Configure to go in 125Khz listen mode
LFSetupFPGAForADC(95, true);
while(!BUTTON_PRESS()) {
// Configure to go in 125Khz listen mode
LFSetupFPGAForADC(0, true);
WDT_HIT();
if (ledcontrol) LED_A_ON();
@ -823,7 +824,6 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
// FSK demodulator
size = fsk_demod(dest, size);
WDT_HIT();
// we now have a set of cycle counts, loop over previous results and aggregate data into bit patterns
// 1->0 : fc/8 in sets of 7