+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
+ SpinDelay(50);
+
+ for (i = 255; i >= 19; i--) {
+ WDT_HIT();
+ FpgaSendCommand(FPGA_CMD_SET_DIVISOR, i);
+ SpinDelay(20);
+ adcval = AvgAdc_Voltage_LF();
+ if (i == 95) *vLf125 = adcval; // voltage at 125Khz
+ if (i == 89) *vLf134 = adcval; // voltage at 134Khz
+
+ LF_Results[i] = adcval >> 9; // scale int to fit in byte for graphing purposes
+ if (LF_Results[i] > peak) {
+ *peakv = adcval;
+ peak = LF_Results[i];
+ *peakf = i;
+ //ptr = i;
+ }
+ }
+
+ for (i = 18; i >= 0; i--) LF_Results[i] = 0;
+
+ return;
+}
+
+void MeasureAntennaTuningHfOnly(int *vHf) {
+ // Let the FPGA drive the high-frequency antenna around 13.56 MHz.
+ LED_A_ON();
+ FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER);
+ SpinDelay(20);
+ *vHf = AvgAdc_Voltage_HF();
+ LED_A_OFF();
+ return;
+}
+
+void MeasureAntennaTuning(int mode) {
+ uint8_t LF_Results[256] = {0};
+ int peakv = 0, peakf = 0;
+ int vLf125 = 0, vLf134 = 0, vHf = 0; // in mV
+
+ LED_B_ON();
+
+ if (((mode & FLAG_TUNE_ALL) == FLAG_TUNE_ALL) && (FpgaGetCurrent() == FPGA_BITSTREAM_HF)) {
+ // Reverse "standard" order if HF already loaded, to avoid unnecessary swap.
+ MeasureAntennaTuningHfOnly(&vHf);
+ MeasureAntennaTuningLfOnly(&vLf125, &vLf134, &peakf, &peakv, LF_Results);
+ } else {
+ if (mode & FLAG_TUNE_LF) {
+ MeasureAntennaTuningLfOnly(&vLf125, &vLf134, &peakf, &peakv, LF_Results);
+ }
+ if (mode & FLAG_TUNE_HF) {
+ MeasureAntennaTuningHfOnly(&vHf);
+ }
+ }
+
+ cmd_send(CMD_MEASURED_ANTENNA_TUNING, vLf125>>1 | (vLf134>>1<<16), vHf, peakf | (peakv>>1<<16), LF_Results, 256);
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+ LED_B_OFF();
+ return;
+}
+
+void MeasureAntennaTuningHf(void) {
+ int vHf = 0; // in mV
+
+ 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);
+
+ for (;;) {
+ SpinDelay(500);
+ vHf = AvgAdc_Voltage_HF();
+
+ Dbprintf("%d mV",vHf);
+ if (BUTTON_PRESS()) break;
+ }
+ DbpString("cancelled");
+
+ FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+
+}
+
+
+void ReadMem(int addr) {
+ const uint8_t *data = ((uint8_t *)addr);
+
+ Dbprintf("%x: %02x %02x %02x %02x %02x %02x %02x %02x",
+ addr, data[0], data[1], data[2], data[3], data[4], data[5], data[6], data[7]);
+}
+
+/* osimage version information is linked in */
+extern struct version_information version_information;
+/* bootrom version information is pointed to from _bootphase1_version_pointer */
+extern char *_bootphase1_version_pointer, _flash_start, _flash_end, _bootrom_start, _bootrom_end, __data_src_start__;
+
+
+void set_hw_capabilities(void) {
+ if (I2C_is_available()) {
+ hw_capabilities |= HAS_SMARTCARD_SLOT;
+ }
+
+ if (false) { // TODO: implement a test
+ hw_capabilities |= HAS_EXTRA_FLASH_MEM;
+ }
+}
+
+
+void SendVersion(void) {
+ LED_A_ON();
+ set_hw_capabilities();
+
+ char temp[USB_CMD_DATA_SIZE]; /* Limited data payload in USB packets */
+ char VersionString[USB_CMD_DATA_SIZE] = { '\0' };
+
+ /* Try to find the bootrom version information. Expect to find a pointer at
+ * symbol _bootphase1_version_pointer, perform slight sanity checks on the
+ * pointer, then use it.
+ */
+ char *bootrom_version = *(char**)&_bootphase1_version_pointer;
+ if (bootrom_version < &_flash_start || bootrom_version >= &_flash_end) {
+ strcat(VersionString, "bootrom version information appears invalid\n");
+ } else {
+ FormatVersionInformation(temp, sizeof(temp), "bootrom: ", bootrom_version);
+ strncat(VersionString, temp, sizeof(VersionString) - strlen(VersionString) - 1);
+ }
+
+ FormatVersionInformation(temp, sizeof(temp), "os: ", &version_information);
+ strncat(VersionString, temp, sizeof(VersionString) - strlen(VersionString) - 1);
+
+ for (int i = 0; i < fpga_bitstream_num; i++) {
+ strncat(VersionString, fpga_version_information[i], sizeof(VersionString) - strlen(VersionString) - 1);
+ strncat(VersionString, "\n", sizeof(VersionString) - strlen(VersionString) - 1);
+ }
+
+ // test availability of SmartCard slot
+ if (I2C_is_available()) {
+ strncat(VersionString, "SmartCard Slot: available\n", sizeof(VersionString) - strlen(VersionString) - 1);
+ } else {
+ strncat(VersionString, "SmartCard Slot: not available\n", sizeof(VersionString) - strlen(VersionString) - 1);
+ }
+
+ // Send Chip ID and used flash memory
+ uint32_t text_and_rodata_section_size = (uint32_t)&__data_src_start__ - (uint32_t)&_flash_start;
+ uint32_t compressed_data_section_size = common_area.arg1;
+ cmd_send(CMD_ACK, *(AT91C_DBGU_CIDR), text_and_rodata_section_size + compressed_data_section_size, hw_capabilities, VersionString, strlen(VersionString) + 1);
+ LED_A_OFF();
+}
+
+// measure the USB Speed by sending SpeedTestBufferSize bytes to client and measuring the elapsed time.
+// Note: this mimics GetFromBigbuf(), i.e. we have the overhead of the UsbCommand structure included.
+void printUSBSpeed(void) {
+ Dbprintf("USB Speed:");
+ Dbprintf(" Sending USB packets to client...");
+
+ #define USB_SPEED_TEST_MIN_TIME 1500 // in milliseconds
+ uint8_t *test_data = BigBuf_get_addr();
+ uint32_t end_time;
+
+ uint32_t start_time = end_time = GetTickCount();
+ uint32_t bytes_transferred = 0;
+
+ while (end_time < start_time + USB_SPEED_TEST_MIN_TIME) {
+ cmd_send(CMD_DOWNLOADED_RAW_ADC_SAMPLES_125K, 0, USB_CMD_DATA_SIZE, 0, test_data, USB_CMD_DATA_SIZE);
+ end_time = GetTickCount();
+ bytes_transferred += USB_CMD_DATA_SIZE;
+ }
+
+ Dbprintf(" Time elapsed: %dms", end_time - start_time);
+ Dbprintf(" Bytes transferred: %d", bytes_transferred);
+ Dbprintf(" USB Transfer Speed PM3 -> Client = %d Bytes/s",
+ 1000 * bytes_transferred / (end_time - start_time));
+
+}
+
+/**
+ * Prints runtime information about the PM3.
+**/
+void SendStatus(void) {
+ LED_A_ON();
+ BigBuf_print_status();
+ Fpga_print_status();
+#ifdef WITH_SMARTCARD
+ I2C_print_status();
+#endif
+ printConfig(); //LF Sampling config
+ printUSBSpeed();
+ Dbprintf("Various");
+ Dbprintf(" MF_DBGLEVEL........%d", MF_DBGLEVEL);
+ Dbprintf(" ToSendMax..........%d", ToSendMax);
+ Dbprintf(" ToSendBit..........%d", ToSendBit);
+
+ cmd_send(CMD_ACK, 1, 0, 0, 0, 0);
+ LED_A_OFF();
+}
+
+#if defined(WITH_ISO14443a_StandAlone) || defined(WITH_LF_StandAlone)
+
+#define OPTS 2
+
+void StandAloneMode() {
+ DbpString("Stand-alone mode! No PC necessary.");
+ // Oooh pretty -- notify user we're in elite samy mode now
+ LED(LED_RED, 200);
+ LED(LED_ORANGE, 200);
+ LED(LED_GREEN, 200);
+ LED(LED_ORANGE, 200);
+ LED(LED_RED, 200);
+ LED(LED_ORANGE, 200);
+ LED(LED_GREEN, 200);
+ LED(LED_ORANGE, 200);
+ LED(LED_RED, 200);
+}
+
+#endif
+
+
+
+#ifdef WITH_ISO14443a_StandAlone
+void StandAloneMode14a() {
+ StandAloneMode();
+ FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
+
+ int selected = 0;
+ bool playing = false, GotoRecord = false, GotoClone = false;
+ bool cardRead[OPTS] = {false};
+ uint8_t readUID[10] = {0};
+ uint32_t uid_1st[OPTS]={0};
+ uint32_t uid_2nd[OPTS]={0};
+ uint32_t uid_tmp1 = 0;
+ uint32_t uid_tmp2 = 0;
+ iso14a_card_select_t hi14a_card[OPTS];
+
+ LED(selected + 1, 0);
+
+ for (;;) {
+ usb_poll();
+ WDT_HIT();
+ SpinDelay(300);
+
+ if (GotoRecord || !cardRead[selected]) {
+ GotoRecord = false;
+ LEDsoff();
+ LED(selected + 1, 0);
+ LED(LED_RED2, 0);
+
+ // record
+ Dbprintf("Enabling iso14443a reader mode for [Bank: %u]...", selected);
+ /* need this delay to prevent catching some weird data */
+ SpinDelay(500);
+ /* Code for reading from 14a tag */
+ uint8_t uid[10] ={0};
+ uint32_t cuid;
+ iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
+
+ for ( ; ; ) {
+ WDT_HIT();
+ if (BUTTON_PRESS()) {
+ if (cardRead[selected]) {
+ Dbprintf("Button press detected -- replaying card in bank[%d]", selected);
+ break;
+ } else if (cardRead[(selected+1)%OPTS]) {
+ Dbprintf("Button press detected but no card in bank[%d] so playing from bank[%d]", selected, (selected+1)%OPTS);
+ selected = (selected+1)%OPTS;
+ break;
+ } else {
+ Dbprintf("Button press detected but no stored tag to play. (Ignoring button)");
+ SpinDelay(300);
+ }
+ }
+ if (!iso14443a_select_card(uid, &hi14a_card[selected], &cuid, true, 0, true))
+ continue;
+ else {
+ Dbprintf("Read UID:"); Dbhexdump(10,uid,0);
+ memcpy(readUID,uid,10*sizeof(uint8_t));
+ uint8_t *dst = (uint8_t *)&uid_tmp1;
+ // Set UID byte order
+ for (int i = 0; i < 4; i++)
+ dst[i] = uid[3-i];
+ dst = (uint8_t *)&uid_tmp2;
+ for (int i = 0; i < 4; i++)
+ dst[i] = uid[7-i];
+ if (uid_1st[(selected+1) % OPTS] == uid_tmp1 && uid_2nd[(selected+1) % OPTS] == uid_tmp2) {
+ Dbprintf("Card selected has same UID as what is stored in the other bank. Skipping.");
+ } else {
+ if (uid_tmp2) {
+ Dbprintf("Bank[%d] received a 7-byte UID", selected);
+ uid_1st[selected] = (uid_tmp1)>>8;
+ uid_2nd[selected] = (uid_tmp1<<24) + (uid_tmp2>>8);
+ } else {
+ Dbprintf("Bank[%d] received a 4-byte UID", selected);
+ uid_1st[selected] = uid_tmp1;
+ uid_2nd[selected] = uid_tmp2;
+ }
+ break;
+ }
+ }
+ }
+ Dbprintf("ATQA = %02X%02X", hi14a_card[selected].atqa[0], hi14a_card[selected].atqa[1]);
+ Dbprintf("SAK = %02X", hi14a_card[selected].sak);
+ LEDsoff();
+ LED(LED_GREEN, 200);
+ LED(LED_ORANGE, 200);
+ LED(LED_GREEN, 200);
+ LED(LED_ORANGE, 200);
+
+ LEDsoff();
+ LED(selected + 1, 0);
+
+ // Next state is replay:
+ playing = true;
+
+ cardRead[selected] = true;
+ } else if (GotoClone) { /* MF Classic UID clone */
+ GotoClone=false;
+ LEDsoff();
+ LED(selected + 1, 0);
+ LED(LED_ORANGE, 250);
+
+
+ // record
+ Dbprintf("Preparing to Clone card [Bank: %x]; uid: %08x", selected, uid_1st[selected]);
+
+ // wait for button to be released
+ while(BUTTON_PRESS()) {
+ // Delay cloning until card is in place
+ WDT_HIT();
+ }
+ Dbprintf("Starting clone. [Bank: %u]", selected);
+ // need this delay to prevent catching some weird data
+ SpinDelay(500);
+ // Begin clone function here:
+ /* Example from client/mifarehost.c for commanding a block write for "magic Chinese" cards:
+ UsbCommand c = {CMD_MIFARE_CSETBLOCK, {wantWipe, params & (0xFE | (uid == NULL ? 0:1)), blockNo}};
+ memcpy(c.d.asBytes, data, 16);
+ SendCommand(&c);
+
+ Block read is similar:
+ UsbCommand c = {CMD_MIFARE_CGETBLOCK, {params, 0, blockNo}};
+ We need to imitate that call with blockNo 0 to set a uid.
+
+ The get and set commands are handled in this file:
+ // Work with "magic Chinese" card
+ case CMD_MIFARE_CSETBLOCK:
+ MifareCSetBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+ break;
+ case CMD_MIFARE_CGETBLOCK:
+ MifareCGetBlock(c->arg[0], c->arg[1], c->arg[2], c->d.asBytes);
+ break;
+
+ mfCSetUID provides example logic for UID set workflow:
+ -Read block0 from card in field with MifareCGetBlock()
+ -Configure new values without replacing reserved bytes
+ memcpy(block0, uid, 4); // Copy UID bytes from byte array
+ // Mifare UID BCC
+ block0[4] = block0[0]^block0[1]^block0[2]^block0[3]; // BCC on byte 5
+ Bytes 5-7 are reserved SAK and ATQA for mifare classic
+ -Use mfCSetBlock(0, block0, oldUID, wantWipe, CSETBLOCK_SINGLE_OPER) to write it
+ */
+ uint8_t oldBlock0[16] = {0}, newBlock0[16] = {0}, testBlock0[16] = {0};
+ // arg0 = Flags == CSETBLOCK_SINGLE_OPER=0x1F, arg1=returnSlot, arg2=blockNo
+ MifareCGetBlock(0x3F, 1, 0, oldBlock0);
+ if (oldBlock0[0] == 0 && oldBlock0[0] == oldBlock0[1] && oldBlock0[1] == oldBlock0[2] && oldBlock0[2] == oldBlock0[3]) {
+ Dbprintf("No changeable tag detected. Returning to replay mode for bank[%d]", selected);
+ playing = true;
+ } else {
+ Dbprintf("UID from target tag: %02X%02X%02X%02X", oldBlock0[0], oldBlock0[1], oldBlock0[2], oldBlock0[3]);
+ memcpy(newBlock0, oldBlock0, 16);
+ // Copy uid_1st for bank (2nd is for longer UIDs not supported if classic)
+
+ newBlock0[0] = uid_1st[selected] >> 24;
+ newBlock0[1] = 0xFF & (uid_1st[selected] >> 16);
+ newBlock0[2] = 0xFF & (uid_1st[selected] >> 8);
+ newBlock0[3] = 0xFF & (uid_1st[selected]);
+ newBlock0[4] = newBlock0[0] ^ newBlock0[1] ^ newBlock0[2] ^ newBlock0[3];
+ // arg0 = needWipe, arg1 = workFlags, arg2 = blockNo, datain
+ MifareCSetBlock(0, 0xFF, 0, newBlock0);
+ MifareCGetBlock(0x3F, 1, 0, testBlock0);
+ if (memcmp(testBlock0, newBlock0, 16) == 0) {
+ DbpString("Cloned successfull!");
+ cardRead[selected] = false; // Only if the card was cloned successfully should we clear it
+ playing = false;
+ GotoRecord = true;
+ selected = (selected+1) % OPTS;
+ } else {
+ Dbprintf("Clone failed. Back to replay mode on bank[%d]", selected);
+ playing = true;
+ }
+ }
+ LEDsoff();
+ LED(selected + 1, 0);
+
+ } else if (playing) {
+ // button_pressed == BUTTON_SINGLE_CLICK && cardRead[selected])
+ // Change where to record (or begin playing)
+ LEDsoff();
+ LED(selected + 1, 0);
+
+ // Begin transmitting
+ LED(LED_GREEN, 0);
+ DbpString("Playing");
+ for ( ; ; ) {
+ WDT_HIT();
+ int button_action = BUTTON_HELD(1000);
+ if (button_action == 0) { // No button action, proceed with sim
+ uint8_t data[512] = {0}; // in case there is a read command received we shouldn't break
+ Dbprintf("Simulating ISO14443a tag with uid[0]: %08x, uid[1]: %08x [Bank: %u]", uid_1st[selected], uid_2nd[selected], selected);
+ if (hi14a_card[selected].sak == 8 && hi14a_card[selected].atqa[0] == 4 && hi14a_card[selected].atqa[1] == 0) {
+ DbpString("Mifare Classic");
+ SimulateIso14443aTag(1, uid_1st[selected], uid_2nd[selected], data); // Mifare Classic
+ } else if (hi14a_card[selected].sak == 0 && hi14a_card[selected].atqa[0] == 0x44 && hi14a_card[selected].atqa[1] == 0) {
+ DbpString("Mifare Ultralight");
+ SimulateIso14443aTag(2, uid_1st[selected], uid_2nd[selected], data); // Mifare Ultralight
+ } else if (hi14a_card[selected].sak == 20 && hi14a_card[selected].atqa[0] == 0x44 && hi14a_card[selected].atqa[1] == 3) {
+ DbpString("Mifare DESFire");
+ SimulateIso14443aTag(3, uid_1st[selected], uid_2nd[selected], data); // Mifare DESFire
+ } else {
+ Dbprintf("Unrecognized tag type -- defaulting to Mifare Classic emulation");
+ SimulateIso14443aTag(1, uid_1st[selected], uid_2nd[selected], data);
+ }
+ } else if (button_action == BUTTON_SINGLE_CLICK) {
+ selected = (selected + 1) % OPTS;
+ Dbprintf("Done playing. Switching to record mode on bank %d",selected);
+ GotoRecord = true;
+ break;
+ } else if (button_action == BUTTON_HOLD) {
+ Dbprintf("Playtime over. Begin cloning...");
+ GotoClone = true;
+ break;
+ }
+ WDT_HIT();
+ }
+
+ /* We pressed a button so ignore it here with a delay */
+ SpinDelay(300);
+ LEDsoff();
+ LED(selected + 1, 0);
+ }
+ }
+}
+
+#elif WITH_LF_StandAlone
+
+// samy's sniff and repeat routine
+void SamyRun() {
+ StandAloneMode();
+ FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
+
+ int tops[OPTS], high[OPTS], low[OPTS];
+ int selected = 0;
+ int playing = 0;
+ int cardRead = 0;
+
+ // Turn on selected LED
+ LED(selected + 1, 0);
+
+ for (;;) {
+ usb_poll();
+ 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 && cardRead == 0) {
+ LEDsoff();
+ LED(selected + 1, 0);
+ LED(LED_RED2, 0);
+
+ // record
+ DbpString("Starting recording");
+
+ // wait for button to be released
+ while(BUTTON_PRESS())
+ WDT_HIT();
+
+ /* need this delay to prevent catching some weird data */
+ SpinDelay(500);
+
+ CmdHIDdemodFSK(1, &tops[selected], &high[selected], &low[selected], 0);
+ if (tops[selected] > 0)
+ Dbprintf("Recorded %x %x%08x%08x", selected, tops[selected], high[selected], low[selected]);
+ else
+ Dbprintf("Recorded %x %x%08x", 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;
+
+ cardRead = 1;
+
+ } else if (button_pressed > 0 && cardRead == 1) {
+ LEDsoff();
+ LED(selected + 1, 0);
+ LED(LED_ORANGE, 0);
+
+ // record
+ if (tops[selected] > 0)
+ Dbprintf("Cloning %x %x%08x%08x", selected, tops[selected], high[selected], low[selected]);
+ else
+ Dbprintf("Cloning %x %x%08x", selected, high[selected], low[selected]);
+
+ // wait for button to be released
+ while(BUTTON_PRESS())
+ WDT_HIT();
+
+ /* need this delay to prevent catching some weird data */
+ SpinDelay(500);
+
+ CopyHIDtoT55x7(tops[selected] & 0x000FFFFF, high[selected], low[selected], (tops[selected] != 0 && ((high[selected]& 0xFFFFFFC0) != 0)), 0x1D);
+ if (tops[selected] > 0)
+ Dbprintf("Cloned %x %x%08x%08x", selected, tops[selected], high[selected], low[selected]);
+ else
+ Dbprintf("Cloned %x %x%08x", 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;
+
+ cardRead = 0;
+
+ } else if (button_pressed) {
+
+ // Change where to record (or begin playing)
+ // Next option if we were previously playing
+ if (playing)
+ selected = (selected + 1) % OPTS;
+ playing = !playing;
+
+ LEDsoff();
+ LED(selected + 1, 0);
+
+ // Begin transmitting
+ if (playing) {
+ LED(LED_GREEN, 0);
+ DbpString("Playing");
+ // wait for button to be released
+ while(BUTTON_PRESS())
+ WDT_HIT();
+ if (tops[selected] > 0)
+ Dbprintf("%x %x%08x%08x", selected, tops[selected], high[selected], low[selected]);
+ else
+ Dbprintf("%x %x%08x", selected, high[selected], low[selected]);
+
+ CmdHIDsimTAG(tops[selected], high[selected], low[selected], 0);
+ DbpString("Done playing");
+ if (BUTTON_HELD(1000) > 0) {
+ DbpString("Exiting");
+ 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;
+ LEDsoff();
+ LED(selected + 1, 0);
+ } else
+ while(BUTTON_PRESS())
+ WDT_HIT();
+ }
+ }
+}
+
+#endif
+
+/*
+OBJECTIVE
+Listen and detect an external reader. Determine the best location
+for the antenna.
+
+INSTRUCTIONS:
+Inside the ListenReaderField() function, there is two mode.
+By default, when you call the function, you will enter mode 1.
+If you press the PM3 button one time, you will enter mode 2.
+If you press the PM3 button a second time, you will exit the function.
+
+DESCRIPTION OF MODE 1:
+This mode just listens for an external reader field and lights up green
+for HF and/or red for LF. This is the original mode of the detectreader
+function.
+
+DESCRIPTION OF MODE 2:
+This mode will visually represent, using the LEDs, the actual strength of the
+current compared to the maximum current detected. Basically, once you know
+what kind of external reader is present, it will help you spot the best location to place
+your antenna. You will probably not get some good results if there is a LF and a HF reader
+at the same place! :-)
+
+LIGHT SCHEME USED:
+*/
+static const char LIGHT_SCHEME[] = {
+ 0x0, /* ---- | No field detected */
+ 0x1, /* X--- | 14% of maximum current detected */
+ 0x2, /* -X-- | 29% of maximum current detected */
+ 0x4, /* --X- | 43% of maximum current detected */
+ 0x8, /* ---X | 57% of maximum current detected */
+ 0xC, /* --XX | 71% of maximum current detected */
+ 0xE, /* -XXX | 86% of maximum current detected */
+ 0xF, /* XXXX | 100% of maximum current detected */
+};
+
+static const int LIGHT_LEN = sizeof(LIGHT_SCHEME)/sizeof(LIGHT_SCHEME[0]);
+
+void ListenReaderField(int limit) {
+ int lf_av, lf_av_new=0, lf_baseline= 0, lf_max;
+ int hf_av, hf_av_new=0, hf_baseline= 0, hf_max;
+ int mode=1, display_val, display_max, i;
+
+#define LF_ONLY 1
+#define HF_ONLY 2
+#define REPORT_CHANGE_PERCENT 5 // report new values only if they have changed at least by REPORT_CHANGE_PERCENT
+#define MIN_HF_FIELD 300 // in mode 1 signal HF field greater than MIN_HF_FIELD above baseline
+#define MIN_LF_FIELD 1200 // in mode 1 signal LF field greater than MIN_LF_FIELD above baseline
+
+
+ // 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 = AvgAdc_Voltage_LF();
+
+ if (limit != HF_ONLY) {
+ Dbprintf("LF 125/134kHz Baseline: %dmV", lf_av);
+ lf_baseline = lf_av;
+ }
+
+ hf_av = hf_max = AvgAdc_Voltage_HF();
+
+ if (limit != LF_ONLY) {
+ Dbprintf("HF 13.56MHz Baseline: %dmV", hf_av);
+ hf_baseline = hf_av;
+ }
+
+ for(;;) {
+ SpinDelay(500);
+ if (BUTTON_PRESS()) {
+ switch (mode) {
+ case 1:
+ mode=2;
+ DbpString("Signal Strength Mode");
+ break;
+ case 2:
+ default:
+ DbpString("Stopped");
+ LEDsoff();
+ return;
+ break;
+ }
+ while (BUTTON_PRESS())
+ /* wait */;
+ }
+ WDT_HIT();
+
+ if (limit != HF_ONLY) {
+ if(mode == 1) {
+ if (lf_av - lf_baseline > MIN_LF_FIELD)
+ LED_D_ON();
+ else
+ LED_D_OFF();
+ }
+
+ lf_av_new = AvgAdc_Voltage_LF();
+ // see if there's a significant change
+ if (ABS((lf_av - lf_av_new) * 100 / (lf_av?lf_av:1)) > REPORT_CHANGE_PERCENT) {
+ Dbprintf("LF 125/134kHz Field Change: %5dmV", lf_av_new);
+ lf_av = lf_av_new;
+ if (lf_av > lf_max)
+ lf_max = lf_av;
+ }
+ }
+
+ if (limit != LF_ONLY) {
+ if (mode == 1){
+ if (hf_av - hf_baseline > MIN_HF_FIELD)
+ LED_B_ON();
+ else
+ LED_B_OFF();
+ }
+
+ hf_av_new = AvgAdc_Voltage_HF();
+
+ // see if there's a significant change
+ if (ABS((hf_av - hf_av_new) * 100 / (hf_av?hf_av:1)) > REPORT_CHANGE_PERCENT) {
+ Dbprintf("HF 13.56MHz Field Change: %5dmV", hf_av_new);
+ hf_av = hf_av_new;
+ if (hf_av > hf_max)
+ hf_max = hf_av;
+ }
+ }
+
+ if (mode == 2) {
+ if (limit == LF_ONLY) {
+ display_val = lf_av;
+ display_max = lf_max;
+ } else if (limit == HF_ONLY) {
+ display_val = hf_av;
+ display_max = hf_max;
+ } else { /* Pick one at random */
+ if( (hf_max - hf_baseline) > (lf_max - lf_baseline) ) {
+ display_val = hf_av;
+ display_max = hf_max;
+ } else {
+ display_val = lf_av;
+ display_max = lf_max;
+ }
+ }
+ for (i = 0; i < LIGHT_LEN; i++) {
+ if (display_val >= (display_max / LIGHT_LEN * i) && display_val <= (display_max / LIGHT_LEN * (i+1))) {
+ if (LIGHT_SCHEME[i] & 0x1) LED_C_ON(); else LED_C_OFF();
+ if (LIGHT_SCHEME[i] & 0x2) LED_A_ON(); else LED_A_OFF();
+ if (LIGHT_SCHEME[i] & 0x4) LED_B_ON(); else LED_B_OFF();
+ if (LIGHT_SCHEME[i] & 0x8) LED_D_ON(); else LED_D_OFF();
+ break;
+ }
+ }
+ }
+ }
+}
+
+
+void UsbPacketReceived(UsbCommand *c) {
projects / proxmark3-svn / blobdiff