X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/0644d5e3a3ed255fea1084c0af564c00f592b36c..31b3689f0b54048de31957e001c60bbd8dfca5a3:/armsrc/appmain.c diff --git a/armsrc/appmain.c b/armsrc/appmain.c index cb1b9f73..f19840b8 100644 --- a/armsrc/appmain.c +++ b/armsrc/appmain.c @@ -10,20 +10,20 @@ // executes. //----------------------------------------------------------------------------- -#include "usb_cdc.h" -#include "cmd.h" +#include "../common/usb_cdc.h" +#include "../common/cmd.h" -#include "proxmark3.h" +#include "../include/proxmark3.h" #include "apps.h" #include "util.h" #include "printf.h" #include "string.h" - #include #include "legicrf.h" -#include +#include "../include/hitag2.h" #include "lfsampling.h" +#include "BigBuf.h" #ifdef WITH_LCD #include "LCD.h" #endif @@ -135,12 +135,25 @@ static int ReadAdc(int ch) AT91C_BASE_ADC->ADC_CR = AT91C_ADC_SWRST; AT91C_BASE_ADC->ADC_MR = - ADC_MODE_PRESCALE(32) | - ADC_MODE_STARTUP_TIME(16) | - ADC_MODE_SAMPLE_HOLD_TIME(8); + ADC_MODE_PRESCALE(63 /* was 32 */) | // ADC_CLK = MCK / ((63+1) * 2) = 48MHz / 128 = 375kHz + ADC_MODE_STARTUP_TIME(1 /* was 16 */) | // Startup Time = (1+1) * 8 / ADC_CLK = 16 / 375kHz = 42,7us Note: must be > 20us + ADC_MODE_SAMPLE_HOLD_TIME(15 /* was 8 */); // Sample & Hold Time SHTIM = 15 / ADC_CLK = 15 / 375kHz = 40us + + // Note: ADC_MODE_PRESCALE and ADC_MODE_SAMPLE_HOLD_TIME are set to the maximum allowed value. + // Both AMPL_LO and AMPL_HI are very high impedance (10MOhm) outputs, the input capacitance of the ADC is 12pF (typical). This results in a time constant + // of RC = 10MOhm * 12pF = 120us. Even after the maximum configurable sample&hold time of 40us the input capacitor will not be fully charged. + // + // The maths are: + // If there is a voltage v_in at the input, the voltage v_cap at the capacitor (this is what we are measuring) will be + // + // v_cap = v_in * (1 - exp(-RC/SHTIM)) = v_in * (1 - exp(-3)) = v_in * 0,95 (i.e. an error of 5%) + // + // Note: with the "historic" values in the comments above, the error was 34% !!! + AT91C_BASE_ADC->ADC_CHER = ADC_CHANNEL(ch); AT91C_BASE_ADC->ADC_CR = AT91C_ADC_START; + while(!(AT91C_BASE_ADC->ADC_SR & ADC_END_OF_CONVERSION(ch))) ; d = AT91C_BASE_ADC->ADC_CDR[ch]; @@ -166,7 +179,7 @@ void MeasureAntennaTuning(void) int i, adcval = 0, peak = 0, peakv = 0, peakf = 0; //ptr = 0 int vLf125 = 0, vLf134 = 0, vHf = 0; // in mV - LED_B_ON(); + LED_B_ON(); /* * Sweeps the useful LF range of the proxmark from @@ -183,9 +196,7 @@ void MeasureAntennaTuning(void) WDT_HIT(); FpgaSendCommand(FPGA_CMD_SET_DIVISOR, i); SpinDelay(20); - // Vref = 3.3V, and a 10000:240 voltage divider on the input - // can measure voltages up to 137500 mV - adcval = ((137500 * AvgAdc(ADC_CHAN_LF)) >> 10); + adcval = ((MAX_ADC_LF_VOLTAGE * AvgAdc(ADC_CHAN_LF)) >> 10); if (i==95) vLf125 = adcval; // voltage at 125Khz if (i==89) vLf134 = adcval; // voltage at 134Khz @@ -200,20 +211,18 @@ void MeasureAntennaTuning(void) for (i=18; i >= 0; i--) LF_Results[i] = 0; - LED_A_ON(); + LED_A_ON(); // Let the FPGA drive the high-frequency antenna around 13.56 MHz. FpgaDownloadAndGo(FPGA_BITSTREAM_HF); FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); SpinDelay(20); - // Vref = 3300mV, and an 10:1 voltage divider on the input - // can measure voltages up to 33000 mV - vHf = (33000 * AvgAdc(ADC_CHAN_HF)) >> 10; + vHf = (MAX_ADC_HF_VOLTAGE * AvgAdc(ADC_CHAN_HF)) >> 10; - cmd_send(CMD_MEASURED_ANTENNA_TUNING,vLf125|(vLf134<<16),vHf,peakf|(peakv<<16),LF_Results,256); + cmd_send(CMD_MEASURED_ANTENNA_TUNING, vLf125 | (vLf134<<16), vHf, peakf | (peakv<<16), LF_Results, 256); FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); - LED_A_OFF(); - LED_B_OFF(); - return; + LED_A_OFF(); + LED_B_OFF(); + return; } void MeasureAntennaTuningHf(void) @@ -222,19 +231,21 @@ void MeasureAntennaTuningHf(void) DbpString("Measuring HF antenna, press button to exit"); + // Let the FPGA drive the high-frequency antenna around 13.56 MHz. + FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); + for (;;) { - // Let the FPGA drive the high-frequency antenna around 13.56 MHz. - FpgaDownloadAndGo(FPGA_BITSTREAM_HF); - FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR); SpinDelay(20); - // Vref = 3300mV, and an 10:1 voltage divider on the input - // can measure voltages up to 33000 mV - vHf = (33000 * AvgAdc(ADC_CHAN_HF)) >> 10; + vHf = (MAX_ADC_HF_VOLTAGE * AvgAdc(ADC_CHAN_HF)) >> 10; Dbprintf("%d mV",vHf); if (BUTTON_PRESS()) break; } DbpString("cancelled"); + + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); + } @@ -358,7 +369,7 @@ void SamyRun() for (;;) { usb_poll(); - WDT_HIT(); + WDT_HIT(); // Was our button held down or pressed? int button_pressed = BUTTON_HELD(1000); @@ -512,26 +523,32 @@ static const int LIGHT_LEN = sizeof(LIGHT_SCHEME)/sizeof(LIGHT_SCHEME[0]); void ListenReaderField(int limit) { - int lf_av, lf_av_new, lf_baseline= 0, lf_count= 0, lf_max; - int hf_av, hf_av_new, hf_baseline= 0, hf_count= 0, hf_max; + int lf_av, lf_av_new, lf_baseline= 0, lf_max; + int hf_av, hf_av_new, hf_baseline= 0, hf_max; int mode=1, display_val, display_max, i; -#define LF_ONLY 1 -#define HF_ONLY 2 +#define LF_ONLY 1 +#define HF_ONLY 2 +#define REPORT_CHANGE 10 // report new values only if they have changed at least by REPORT_CHANGE + + + // switch off FPGA - we don't want to measure our own signal + FpgaDownloadAndGo(FPGA_BITSTREAM_HF); + FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF); LEDsoff(); - lf_av=lf_max=ReadAdc(ADC_CHAN_LF); + lf_av = lf_max = AvgAdc(ADC_CHAN_LF); if(limit != HF_ONLY) { - Dbprintf("LF 125/134 Baseline: %d", lf_av); + Dbprintf("LF 125/134kHz Baseline: %dmV", (MAX_ADC_LF_VOLTAGE * lf_av) >> 10); lf_baseline = lf_av; } - hf_av=hf_max=ReadAdc(ADC_CHAN_HF); + hf_av = hf_max = AvgAdc(ADC_CHAN_HF); if (limit != LF_ONLY) { - Dbprintf("HF 13.56 Baseline: %d", hf_av); + Dbprintf("HF 13.56MHz Baseline: %dmV", (MAX_ADC_HF_VOLTAGE * hf_av) >> 10); hf_baseline = hf_av; } @@ -554,38 +571,38 @@ void ListenReaderField(int limit) WDT_HIT(); if (limit != HF_ONLY) { - if(mode==1) { - if (abs(lf_av - lf_baseline) > 10) LED_D_ON(); - else LED_D_OFF(); + if(mode == 1) { + if (abs(lf_av - lf_baseline) > REPORT_CHANGE) + LED_D_ON(); + else + LED_D_OFF(); } - ++lf_count; - lf_av_new= ReadAdc(ADC_CHAN_LF); + lf_av_new = AvgAdc(ADC_CHAN_LF); // see if there's a significant change - if(abs(lf_av - lf_av_new) > 10) { - Dbprintf("LF 125/134 Field Change: %x %x %x", lf_av, lf_av_new, lf_count); + if(abs(lf_av - lf_av_new) > REPORT_CHANGE) { + Dbprintf("LF 125/134kHz Field Change: %5dmV", (MAX_ADC_LF_VOLTAGE * lf_av_new) >> 10); lf_av = lf_av_new; if (lf_av > lf_max) lf_max = lf_av; - lf_count= 0; } } if (limit != LF_ONLY) { if (mode == 1){ - if (abs(hf_av - hf_baseline) > 10) LED_B_ON(); - else LED_B_OFF(); + if (abs(hf_av - hf_baseline) > REPORT_CHANGE) + LED_B_ON(); + else + LED_B_OFF(); } - ++hf_count; - hf_av_new= ReadAdc(ADC_CHAN_HF); + hf_av_new = AvgAdc(ADC_CHAN_HF); // see if there's a significant change - if(abs(hf_av - hf_av_new) > 10) { - Dbprintf("HF 13.56 Field Change: %x %x %x", hf_av, hf_av_new, hf_count); + if(abs(hf_av - hf_av_new) > REPORT_CHANGE) { + Dbprintf("HF 13.56MHz Field Change: %5dmV", (MAX_ADC_HF_VOLTAGE * hf_av_new) >> 10); hf_av = hf_av_new; if (hf_av > hf_max) hf_max = hf_av; - hf_count= 0; } } @@ -622,7 +639,7 @@ void UsbPacketReceived(uint8_t *packet, int len) { UsbCommand *c = (UsbCommand *)packet; -// Dbprintf("received %d bytes, with command: 0x%04x and args: %d %d %d",len,c->cmd,c->arg[0],c->arg[1],c->arg[2]); + //Dbprintf("received %d bytes, with command: 0x%04x and args: %d %d %d",len,c->cmd,c->arg[0],c->arg[1],c->arg[2]); switch(c->cmd) { #ifdef WITH_LF @@ -666,9 +683,8 @@ void UsbPacketReceived(uint8_t *packet, int len) WriteTItag(c->arg[0],c->arg[1],c->arg[2]); break; case CMD_SIMULATE_TAG_125K: - LED_A_ON(); - SimulateTagLowFrequency(c->arg[0], c->arg[1], 1); - LED_A_OFF(); + SimulateTagLowFrequency(c->arg[0], c->arg[1], 0); + //SimulateTagLowFrequencyA(c->arg[0], c->arg[1]); break; case CMD_LF_SIMULATE_BIDIR: SimulateTagLowFrequencyBidir(c->arg[0], c->arg[1]); @@ -790,6 +806,10 @@ void UsbPacketReceived(uint8_t *packet, int len) EPA_PACE_Collect_Nonce(c); break; + // case CMD_EPA_: + // EpaFoo(c); + // break; + case CMD_READER_MIFARE: ReaderMifare(c->arg[0]); break; @@ -807,7 +827,7 @@ void UsbPacketReceived(uint8_t *packet, int len) break; case CMD_MIFAREU_READCARD: MifareUReadCard(c->arg[0], c->arg[1], c->d.asBytes); - break; + break; case CMD_MIFAREUC_READCARD: MifareUReadCard(c->arg[0], c->arg[1], c->d.asBytes); break; @@ -880,7 +900,7 @@ void UsbPacketReceived(uint8_t *packet, int len) ReaderIClass(c->arg[0]); break; case CMD_READER_ICLASS_REPLAY: - ReaderIClass_Replay(c->arg[0], c->d.asBytes); + ReaderIClass_Replay(c->arg[0], c->d.asBytes); break; #endif @@ -916,10 +936,10 @@ void UsbPacketReceived(uint8_t *packet, int len) uint8_t *BigBuf = BigBuf_get_addr(); for(size_t i=0; iarg[1]; i += USB_CMD_DATA_SIZE) { size_t len = MIN((c->arg[1] - i),USB_CMD_DATA_SIZE); - cmd_send(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K,i,len,traceLen,BigBuf+c->arg[0]+i,len); + cmd_send(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K,i,len,BigBuf_get_traceLen(),BigBuf+c->arg[0]+i,len); } // Trigger a finish downloading signal with an ACK frame - cmd_send(CMD_ACK,1,0,traceLen,getSamplingConfig(),sizeof(sample_config)); + cmd_send(CMD_ACK,1,0,BigBuf_get_traceLen(),getSamplingConfig(),sizeof(sample_config)); LED_B_OFF(); break; @@ -995,7 +1015,7 @@ void UsbPacketReceived(uint8_t *packet, int len) void __attribute__((noreturn)) AppMain(void) { SpinDelay(100); - + clear_trace(); if(common_area.magic != COMMON_AREA_MAGIC || common_area.version != 1) { /* Initialize common area */ memset(&common_area, 0, sizeof(common_area)); @@ -1010,7 +1030,7 @@ void __attribute__((noreturn)) AppMain(void) LED_A_OFF(); // Init USB device - usb_enable(); + usb_enable(); // The FPGA gets its clock from us from PCK0 output, so set that up. AT91C_BASE_PIOA->PIO_BSR = GPIO_PCK0; @@ -1040,12 +1060,12 @@ void __attribute__((noreturn)) AppMain(void) size_t rx_len; for(;;) { - if (usb_poll()) { - rx_len = usb_read(rx,sizeof(UsbCommand)); - if (rx_len) { - UsbPacketReceived(rx,rx_len); - } - } + if (usb_poll()) { + rx_len = usb_read(rx,sizeof(UsbCommand)); + if (rx_len) { + UsbPacketReceived(rx,rx_len); + } + } WDT_HIT(); #ifdef WITH_LF