From 73da8187432925a1f89c3d5cdb302fec1997d7b1 Mon Sep 17 00:00:00 2001 From: marshmellow42 Date: Sat, 28 Feb 2015 14:33:05 -0500 Subject: [PATCH] lf simulation tests added SimulateTagLowFrequencyTest function with some adjustments that help ASK simulations FSK and PSK still need help. Left original HID sim alone as for some it may partially work. --- armsrc/lfops.c | 164 +++++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 137 insertions(+), 27 deletions(-) diff --git a/armsrc/lfops.c b/armsrc/lfops.c index ea36cdec..866ff5d2 100644 --- a/armsrc/lfops.c +++ b/armsrc/lfops.c @@ -399,6 +399,7 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol) i = 0; for(;;) { + //wait until SSC_CLK goes HIGH while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) { if(BUTTON_PRESS()) { DbpString("Stopped"); @@ -406,7 +407,6 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol) } WDT_HIT(); } - if (ledcontrol) LED_D_ON(); @@ -417,17 +417,78 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol) if (ledcontrol) LED_D_OFF(); - //wait for next sample time + //wait until SSC_CLK goes LOW while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) { if(BUTTON_PRESS()) { DbpString("Stopped"); return; } WDT_HIT(); + } + + i++; + if(i == period) { + + i = 0; + if (gap) { + SHORT_COIL(); + SpinDelayUs(gap); + } + } + } +} + +//Testing to fix timing issues +void SimulateTagLowFrequencyTest(int period, int gap, int ledcontrol) +{ + int i; + uint8_t *tab = BigBuf_get_addr(); + + FpgaDownloadAndGo(FPGA_BITSTREAM_LF); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_EDGE_DETECT); + + AT91C_BASE_PIOA->PIO_PER = GPIO_SSC_DOUT | GPIO_SSC_CLK; + + AT91C_BASE_PIOA->PIO_OER = GPIO_SSC_DOUT; + AT91C_BASE_PIOA->PIO_ODR = GPIO_SSC_CLK; + + #define SHORT_COIL() LOW(GPIO_SSC_DOUT) + #define OPEN_COIL() HIGH(GPIO_SSC_DOUT) + + i = 0; + while(!BUTTON_PRESS()) { + + WDT_HIT(); + //wait until reader carrier is HIGH + while(!(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK)) { + WDT_HIT(); } + if (i>0 && tab[i]!=tab[i-1]){ + // transition + if (ledcontrol) + LED_D_ON(); + + // modulate coil + if(tab[i]) + OPEN_COIL(); + else + SHORT_COIL(); + if (ledcontrol) + LED_D_OFF(); + } else { //no transition + //NOTE: it appears the COIL transition messes with the detection of the carrier, so if a transition happened + // skip test for readers Carrier = LOW, otherwise we get a bit behind + + //wait until reader carrier is LOW + while(AT91C_BASE_PIOA->PIO_PDSR & GPIO_SSC_CLK) { + WDT_HIT(); + } + } + i++; - if(i == period) { + if(i == period) { + // end of data stream, gap then repeat i = 0; if (gap) { SHORT_COIL(); @@ -435,6 +496,8 @@ void SimulateTagLowFrequency(int period, int gap, int ledcontrol) } } } + DbpString("Stopped"); + return; } #define DEBUG_FRAME_CONTENTS 1 @@ -491,27 +554,43 @@ static void fc(int c, int *n) } } // compose fc/X fc/Y waveform (FSKx) -static void fcAll(uint8_t c, int *n, uint8_t clock) +static void fcAll(uint8_t c, int *n, uint8_t clock, uint16_t *modCnt) { uint8_t *dest = BigBuf_get_addr(); uint8_t idx; uint8_t fcCnt; // c = count of field clock for this bit - - int mod = clock % c; + uint8_t mod = clock % c; + uint8_t modAdj = c/mod; + bool modAdjOk=FALSE; + if (c % mod==0) modAdjOk=TRUE; // loop through clock - step field clock for (idx=0; idx < (uint8_t) clock/c; idx++){ // loop through field clock length - put 1/2 FC length 1's and 1/2 0's per field clock wave (to create the wave) - for (fcCnt=0; fcCnt < c; fcCnt++){ + for (fcCnt=0; fcCnt < c; fcCnt++){ //fudge slow transition from low to high - shorten wave by 1 if (fcCnt < c/2){ dest[((*n)++)]=1; } else { + //fudge low to high transition + //if (idx==clock/c && dest[*n-1]==1 && mod>0) dest[((*n++))]=0; dest[((*n)++)]=0; } } } - Dbprintf("mod: %d",mod); - if (mod>0){ //for FC counts that don't add up to a full clock cycle padd with extra wave + if (mod>0) (*modCnt)++; + if ((mod>0) && modAdjOk){ //fsk2 + if ((*modCnt % modAdj) == 0){ + for (fcCnt=0; fcCnt < c; fcCnt++){ //fudge slow transition from low to high - shorten wave by 1 + if (fcCnt < c/2){ + dest[((*n)++)]=1; + } else { + dest[((*n)++)]=0; + } + } + } + } + //Dbprintf("mod: %d, modAdj %d, modc %d",mod, modAdj, c % mod); + if (mod>0 && !modAdjOk){ //fsk1 for (idx=0; idx < mod; idx++){ if (idx < mod/2) { dest[((*n)++)]=1; @@ -587,6 +666,7 @@ void CmdFSKsimTAG(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream) int n=0, i=0; uint8_t fcHigh = arg1 >> 8; uint8_t fcLow = arg1 & 0xFF; + uint16_t modCnt = 0; //spacer bit uint8_t clk = arg2 & 0xFF; uint8_t invert = (arg2 >> 8) & 1; @@ -595,26 +675,48 @@ void CmdFSKsimTAG(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream) WDT_HIT(); for (i=0; i> 8; uint8_t carrier = arg1 & 0xFF; uint8_t invert = arg2 & 0xFF; - uint8_t phase = carrier/2; //extra phase changing bits = 1/2 a carrier wave to change the phase + //uint8_t phase = carrier/2; //extra phase changing bits = 1/2 a carrier wave to change the phase //uint8_t invert = (arg2 >> 8) & 1; uint8_t curPhase = 0; WDT_HIT(); @@ -728,11 +830,11 @@ void CmdPSKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream) if (BitStream[i] == curPhase){ pskSimBit(carrier, &n, clk, &curPhase, FALSE); } else { - pskSimBit(phase, &n, clk, &curPhase, TRUE); + pskSimBit(carrier, &n, clk, &curPhase, TRUE); } } Dbprintf("Simulating with Carrier: %d, clk: %d, invert: %d, n: %d",carrier, clk, invert, n); - Dbprintf("First 64:"); + Dbprintf("First 128:"); uint8_t *dest = BigBuf_get_addr(); i=0; Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]); @@ -742,10 +844,18 @@ void CmdPSKsimTag(uint16_t arg1, uint16_t arg2, size_t size, uint8_t *BitStream) Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]); i+=16; Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]); + i+=16; + Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]); + i+=16; + Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]); + i+=16; + Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]); + i+=16; + Dbprintf("%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d%d", dest[i],dest[i+1],dest[i+2],dest[i+3],dest[i+4],dest[i+5],dest[i+6],dest[i+7],dest[i+8],dest[i+9],dest[i+10],dest[i+11],dest[i+12],dest[i+13],dest[i+14],dest[i+15]); if (ledcontrol) LED_A_ON(); - SimulateTagLowFrequency(n, 0, ledcontrol); + SimulateTagLowFrequencyTest(n, 0, ledcontrol); if (ledcontrol) LED_A_OFF(); -- 2.39.2