From c701d2c2faff177cc4a858c991d3f243a75877fe Mon Sep 17 00:00:00 2001 From: d18c7db Date: Sun, 19 Jul 2009 04:37:07 +0000 Subject: [PATCH] Initial attempt at TI tag reading. --- armsrc/appmain.c | 142 ++++++++++++++++++++++++++++++++++------------- 1 file changed, 104 insertions(+), 38 deletions(-) diff --git a/armsrc/appmain.c b/armsrc/appmain.c index b539e667..47da5ad5 100644 --- a/armsrc/appmain.c +++ b/armsrc/appmain.c @@ -71,7 +71,7 @@ void DbpString(char *str) /* this holds up stuff unless we're connected to usb */ // if (!usbattached) // return; - + UsbCommand c; c.cmd = CMD_DEBUG_PRINT_STRING; c.ext1 = strlen(str); @@ -103,10 +103,10 @@ void AcquireRawAdcSamples125k(BOOL at134khz) { if(at134khz) { FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); } else { FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); } // Connect the A/D to the peak-detected low-frequency path. @@ -157,13 +157,13 @@ void ModThenAcquireRawAdcSamples125k(int delay_off,int period_0,int period_1,BYT at134khz= TRUE; else at134khz= FALSE; - + if(at134khz) { FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); } else { FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); } // Give it a bit of time for the resonant antenna to settle. @@ -180,10 +180,10 @@ void ModThenAcquireRawAdcSamples125k(int delay_off,int period_0,int period_1,BYT SpinDelayUs(delay_off); if(at134khz) { FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); } else { FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); } LED_D_ON(); if(*(command++) == '0') @@ -196,16 +196,78 @@ void ModThenAcquireRawAdcSamples125k(int delay_off,int period_0,int period_1,BYT SpinDelayUs(delay_off); if(at134khz) { FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_134_KHZ); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); } else { FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); } // now do the read DoAcquisition125k(at134khz); } +//----------------------------------------------------------------------------- +// Read a TI-type tag. We assume that the tag has already been illuminated, +// and that the exciting signal has been turned off. That means that we just +// acquire the `one-bit DAC' bits from the comparator. +//----------------------------------------------------------------------------- +void AcquireTiType(void) +{ + int i; + int n = 4000; + + // clear buffer + memset(BigBuf,0,sizeof(BigBuf)); + + // Set up the synchronous serial port + PIO_DISABLE = (1<= n) return; + } + WDT_HIT(); + } +} + +void AcquireRawBitsTI(void) +{ + LED_D_ON(); + // TI tags charge at 134.2Khz + FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 88); //134.8Khz + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); + + // Charge TI tag for 50ms. + SpinDelay(50); + LED_D_OFF(); + + LED_A_ON(); + // Place FPGA in passthrough mode so as to stop driving the LF coil, + // in this mode the CROSS_LO line connects to SSP_DIN + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_PASSTHRU); + + // get TI tag data into the buffer + AcquireTiType(); + + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + LED_A_OFF(); +} + //----------------------------------------------------------------------------- // Read an ADC channel and block till it completes, then return the result // in ADC units (0 to 1023). Also a routine to average 32 samples and @@ -288,7 +350,7 @@ void MeasureAntennaTuning(void) c.cmd = CMD_MEASURED_ANTENNA_TUNING; c.ext1 = (vLf125 << 0) | (vLf134 << 16); c.ext2 = vHf; - c.ext3 = peakf | (peakv << 16); + c.ext3 = peakf | (peakv << 16); UsbSendPacket((BYTE *)&c, sizeof(c)); } @@ -324,7 +386,7 @@ void SimulateTagLowFrequency(int period, int ledcontrol) OPEN_COIL(); else SHORT_COIL(); - + if (ledcontrol) LED_D_OFF(); @@ -439,7 +501,7 @@ static void CmdHIDsimTAG(int hi, int lo, int ledcontrol) if (ledcontrol) LED_A_ON(); SimulateTagLowFrequency(n, ledcontrol); - + if (ledcontrol) LED_A_OFF(); } @@ -452,7 +514,7 @@ static void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol) DWORD hi=0, lo=0; FpgaSendCommand(FPGA_CMD_SET_DIVISOR, 95); //125Khz - FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER | FPGA_LF_READER_USE_125_KHZ); + FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_READER); // Connect the A/D to the peak-detected low-frequency path. SetAdcMuxFor(GPIO_MUXSEL_LOPKD); @@ -698,6 +760,10 @@ void UsbPacketReceived(BYTE *packet, int len) ModThenAcquireRawAdcSamples125k(c->ext1,c->ext2,c->ext3,c->d.asBytes); break; + case CMD_ACQUIRE_RAW_BITS_TI_TYPE: + AcquireRawBitsTI(); + break; + case CMD_ACQUIRE_RAW_ADC_SAMPLES_ISO_15693: AcquireRawAdcSamplesIso15693(); break; @@ -830,7 +896,7 @@ void ReadMem(int addr) { const DWORD *data = ((DWORD *)addr); int i; - + DbpString("Reading memory at address"); DbpIntegers(0, 0, addr); for (i = 0; i < 8; i+= 2) @@ -911,7 +977,7 @@ void SamyRun() #define OPTS 2 int high[OPTS], low[OPTS]; - + // Oooh pretty -- notify user we're in elite samy mode now LED(LED_RED, 200); LED(LED_ORANGE, 200); @@ -922,29 +988,29 @@ void SamyRun() LED(LED_GREEN, 200); LED(LED_ORANGE, 200); LED(LED_RED, 200); - + int selected = 0; int playing = 0; - + // Turn on selected LED LED(selected + 1, 0); - + for (;;) { usbattached = UsbPoll(FALSE); WDT_HIT(); - + // Was our button held down or pressed? int button_pressed = BUTTON_HELD(1000); SpinDelay(300); - + // Button was held for a second, begin recording if (button_pressed > 0) { LEDsoff(); LED(selected + 1, 0); LED(LED_RED2, 0); - + // record DbpString("Starting recording"); @@ -958,16 +1024,16 @@ void SamyRun() CmdHIDdemodFSK(1, &high[selected], &low[selected], 0); DbpString("Recorded"); DbpIntegers(selected, high[selected], low[selected]); - + LEDsoff(); LED(selected + 1, 0); // Finished recording - + // If we were previously playing, set playing off // so next button push begins playing what we recorded playing = 0; } - + // Change where to record (or begin playing) else if (button_pressed) { @@ -975,10 +1041,10 @@ void SamyRun() if (playing) selected = (selected + 1) % OPTS; playing = !playing; - + LEDsoff(); LED(selected + 1, 0); - + // Begin transmitting if (playing) { @@ -996,10 +1062,10 @@ void SamyRun() LEDsoff(); return; } - + /* We pressed a button so ignore it here with a delay */ SpinDelay(300); - + // when done, we're done playing, move to next option selected = (selected + 1) % OPTS; playing = !playing; @@ -1014,7 +1080,7 @@ void SamyRun() } -// listen for external reader +// listen for external reader void ListenReaderField(int limit) { int lf_av, lf_av_new, lf_baseline= 0, lf_count= 0; @@ -1030,7 +1096,7 @@ void ListenReaderField(int limit) lf_av= ReadAdc(ADC_CHAN_LF); - if(limit != HF_ONLY) + if(limit != HF_ONLY) { DbpString("LF 125/134 Baseline:"); DbpIntegers(lf_av,0,0); @@ -1040,16 +1106,16 @@ void ListenReaderField(int limit) hf_av= ReadAdc(ADC_CHAN_HF); - if (limit != LF_ONLY) + if (limit != LF_ONLY) { DbpString("HF 13.56 Baseline:"); DbpIntegers(hf_av,0,0); hf_baseline= hf_av; } - for(;;) + for(;;) { - if(BUTTON_PRESS()) + if(BUTTON_PRESS()) { DbpString("Stopped"); LED_B_OFF(); @@ -1059,7 +1125,7 @@ void ListenReaderField(int limit) WDT_HIT(); - if (limit != HF_ONLY) + if (limit != HF_ONLY) { if (abs(lf_av - lf_baseline) > 10) LED_D_ON(); @@ -1068,7 +1134,7 @@ void ListenReaderField(int limit) ++lf_count; lf_av_new= ReadAdc(ADC_CHAN_LF); // see if there's a significant change - if(abs(lf_av - lf_av_new) > 10) + if(abs(lf_av - lf_av_new) > 10) { DbpString("LF 125/134 Field Change:"); DbpIntegers(lf_av,lf_av_new,lf_count); @@ -1077,7 +1143,7 @@ void ListenReaderField(int limit) } } - if (limit != LF_ONLY) + if (limit != LF_ONLY) { if (abs(hf_av - hf_baseline) > 10) LED_B_ON(); @@ -1086,7 +1152,7 @@ void ListenReaderField(int limit) ++hf_count; hf_av_new= ReadAdc(ADC_CHAN_HF); // see if there's a significant change - if(abs(hf_av - hf_av_new) > 10) + if(abs(hf_av - hf_av_new) > 10) { DbpString("HF 13.56 Field Change:"); DbpIntegers(hf_av,hf_av_new,hf_count); -- 2.39.2