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chg: adjusting 14b demod to increase reading distance

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This commit is contained in:
Chris 2018-06-30 22:48:59 +02:00
parent 2b294912ee
commit ed5367a124
1 changed files with 3 additions and 12 deletions
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15
armsrc/iso14443b.c
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@ -845,7 +845,7 @@ static RAMFUNC int Handle14443bTagSamplesDemod(int ci, int cq) {
}
} else {
// low phase of SOF too long (> 12 etu)
if (Demod.posCount > 12*2) {
if (Demod.posCount > 14*2) {
Demod.state = DEMOD_UNSYNCD;
LED_C_OFF();
}
@ -858,7 +858,7 @@ static RAMFUNC int Handle14443bTagSamplesDemod(int ci, int cq) {
MAKE_SOFT_DECISION();
if (v > 0) {
if (Demod.posCount > 3*2) { // max 19us between characters = 16 1/fs, max 3 etu after low phase of SOF = 24 1/fs
if (Demod.posCount > 6*2) { // max 19us between characters = 16 1/fs, max 3 etu after low phase of SOF = 24 1/fs
Demod.state = DEMOD_UNSYNCD;
LED_C_OFF();
}
@ -987,15 +987,6 @@ static void GetTagSamplesFor14443bDemod() {
if ( upTo )
upTo = NULL;
/*
if (MF_DBGLEVEL >= 3) {
Dbprintf("Demod.state = %d, Demod.len = %u",
Demod.state,
Demod.len
);
}
*/
// print the last batch of IQ values from FPGA
if (MF_DBGLEVEL == 4)
Dbhexdump(ISO14443B_DMA_BUFFER_SIZE, (uint8_t *)dmaBuf, false);
@ -1341,7 +1332,7 @@ void iso14443b_setup() {
// Signal field is on with the appropriate LED
FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_TX | FPGA_HF_READER_TX_SHALLOW_MOD);
SpinDelay(100);
SpinDelay(300);
// Start the timer
StartCountSspClk();