mirror of
https://github.com/Proxmark/proxmark3.git
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lf t55xx and some lf demod fixes/adjustments
finally think I like the lf t55xx detect and read cmds. pretty reliable now.
This commit is contained in:
marshmellow42
parent
f665067919
commit
db8296025f
6 changed files with 230 additions and 210 deletions
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@ -1078,21 +1078,7 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
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#define WRITE_GAP 20*8 // was 160 // SPEC: 1*8 to 20*8 - typ 10*8 (or 10fc)
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#define WRITE_0 18*8 // was 144 // SPEC: 16*8 to 32*8 - typ 24*8 (or 24fc)
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#define WRITE_1 50*8 // was 400 // SPEC: 48*8 to 64*8 - typ 56*8 (or 56fc) 432 for T55x7; 448 for E5550
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#define READ_GAP 52*8
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// VALUES TAKEN FROM EM4x function: SendForward
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// START_GAP = 440; (55*8) cycles at 125Khz (8us = 1cycle)
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// WRITE_GAP = 128; (16*8)
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// WRITE_1 = 256 32*8; (32*8)
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// These timings work for 4469/4269/4305 (with the 55*8 above)
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// WRITE_0 = 23*8 , 9*8 SpinDelayUs(23*8);
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// Sam7s has several timers, we will use the source TIMER_CLOCK1 (aka AT91C_TC_CLKS_TIMER_DIV1_CLOCK)
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// TIMER_CLOCK1 = MCK/2, MCK is running at 48 MHz, Timer is running at 48/2 = 24 MHz
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// Hitag units (T0) have duration of 8 microseconds (us), which is 1/125000 per second (carrier)
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// T0 = TIMER_CLOCK1 / 125000 = 192
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// 1 Cycle = 8 microseconds(us) == 1 field clock
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#define READ_GAP 26*8
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void TurnReadLFOn(int delay) {
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FpgaWriteConfWord(FPGA_MAJOR_MODE_LF_ADC | FPGA_LF_ADC_READER_FIELD);
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@ -1191,7 +1177,7 @@ void T55xxWriteBlock(uint32_t Data, uint32_t Block, uint32_t Pwd, uint8_t arg) {
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cmd_send(CMD_ACK,0,0,0,0,0);
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}
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// Read one card block in page 0
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// Read one card block in page [page]
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void T55xxReadBlock(uint16_t arg0, uint8_t Block, uint32_t Pwd) {
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LED_A_ON();
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bool PwdMode = arg0 & 0x1;
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@ -1475,6 +1461,14 @@ uint8_t * fwd_write_ptr; //forwardlink bit pointer
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// see EM4469 spec
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//====================================================================
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//--------------------------------------------------------------------
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// VALUES TAKEN FROM EM4x function: SendForward
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// START_GAP = 440; (55*8) cycles at 125Khz (8us = 1cycle)
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// WRITE_GAP = 128; (16*8)
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// WRITE_1 = 256 32*8; (32*8)
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// These timings work for 4469/4269/4305 (with the 55*8 above)
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// WRITE_0 = 23*8 , 9*8 SpinDelayUs(23*8);
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uint8_t Prepare_Cmd( uint8_t cmd ) {
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//--------------------------------------------------------------------
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@ -268,7 +268,7 @@ void doT55x7Acquisition(size_t sample_size) {
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bool startFound = false;
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bool highFound = false;
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uint8_t curSample = 0;
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uint8_t firstSample = 0;
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uint8_t lastSample = 0;
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uint16_t skipCnt = 0;
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while(!BUTTON_PRESS() && skipCnt<1000) {
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WDT_HIT();
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@ -282,19 +282,18 @@ void doT55x7Acquisition(size_t sample_size) {
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// skip until the first high sample above threshold
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if (!startFound && curSample > T55xx_READ_UPPER_THRESHOLD) {
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if (curSample > firstSample)
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firstSample = curSample;
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if (curSample > lastSample)
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lastSample = curSample;
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highFound = true;
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} else if (!highFound) {
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skipCnt++;
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continue;
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}
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// skip until first high samples begin to change
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if (startFound || curSample < firstSample-T55xx_READ_TOL){
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if (startFound || curSample < T55xx_READ_UPPER_THRESHOLD-T55xx_READ_TOL){
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// if just found start - recover last sample
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if (!startFound) {
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dest[i++] = firstSample;
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dest[i++] = lastSample;
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startFound = true;
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}
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// collect samples
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@ -1715,7 +1715,7 @@ int NRZrawDemod(const char *Cmd, bool verbose)
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size_t BitLen = getFromGraphBuf(BitStream);
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if (BitLen==0) return 0;
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int errCnt=0;
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errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert, maxErr);
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errCnt = nrzRawDemod(BitStream, &BitLen, &clk, &invert);
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if (errCnt > maxErr){
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if (g_debugMode) PrintAndLog("Too many errors found, clk: %d, invert: %d, numbits: %d, errCnt: %d",clk,invert,BitLen,errCnt);
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return 0;
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@ -353,16 +353,20 @@ bool DecodeT55xxBlock(){
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ans = FSKrawDemod(cmdStr, FALSE);
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break;
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case DEMOD_ASK:
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snprintf(cmdStr, sizeof(buf),"%d %d 0", bitRate[config.bitrate], config.inverted );
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snprintf(cmdStr, sizeof(buf),"%d %d 1", bitRate[config.bitrate], config.inverted );
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ans = ASKDemod(cmdStr, FALSE, FALSE, 1);
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break;
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case DEMOD_PSK1:
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snprintf(cmdStr, sizeof(buf),"%d %d 0", bitRate[config.bitrate], config.inverted );
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// skip first 160 samples to allow antenna to settle in (psk gets inverted occasionally otherwise)
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CmdLtrim("160");
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snprintf(cmdStr, sizeof(buf),"%d %d 6", bitRate[config.bitrate], config.inverted );
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ans = PSKDemod(cmdStr, FALSE);
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break;
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case DEMOD_PSK2: //inverted won't affect this
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case DEMOD_PSK3: //not fully implemented
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snprintf(cmdStr, sizeof(buf),"%d 0 1", bitRate[config.bitrate] );
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// skip first 160 samples to allow antenna to settle in (psk gets inverted occasionally otherwise)
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CmdLtrim("160");
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snprintf(cmdStr, sizeof(buf),"%d 0 6", bitRate[config.bitrate] );
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ans = PSKDemod(cmdStr, FALSE);
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psk1TOpsk2(DemodBuffer, DemodBufferLen);
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break;
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@ -372,7 +376,7 @@ bool DecodeT55xxBlock(){
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break;
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case DEMOD_BI:
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case DEMOD_BIa:
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snprintf(cmdStr, sizeof(buf),"0 %d %d 0", bitRate[config.bitrate], config.inverted );
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snprintf(cmdStr, sizeof(buf),"0 %d %d 1", bitRate[config.bitrate], config.inverted );
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ans = ASKbiphaseDemod(cmdStr, FALSE);
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break;
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default:
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@ -432,28 +436,28 @@ bool tryDetectModulation(){
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} else {
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clk = GetAskClock("", FALSE, FALSE);
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if (clk>0) {
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if ( ASKDemod("0 0 0", FALSE, FALSE, 1) && test(DEMOD_ASK, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5)) {
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if ( ASKDemod("0 0 1", FALSE, FALSE, 1) && test(DEMOD_ASK, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5)) {
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tests[hits].modulation = DEMOD_ASK;
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tests[hits].bitrate = bitRate;
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tests[hits].inverted = FALSE;
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tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);
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++hits;
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}
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if ( ASKDemod("0 1 0", FALSE, FALSE, 1) && test(DEMOD_ASK, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5)) {
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if ( ASKDemod("0 1 1", FALSE, FALSE, 1) && test(DEMOD_ASK, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5)) {
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tests[hits].modulation = DEMOD_ASK;
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tests[hits].bitrate = bitRate;
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tests[hits].inverted = TRUE;
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tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);
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++hits;
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}
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if ( ASKbiphaseDemod("0 0 0 0", FALSE) && test(DEMOD_BI, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5) ) {
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if ( ASKbiphaseDemod("0 0 0 2", FALSE) && test(DEMOD_BI, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5) ) {
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tests[hits].modulation = DEMOD_BI;
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tests[hits].bitrate = bitRate;
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tests[hits].inverted = FALSE;
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tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);
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++hits;
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}
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if ( ASKbiphaseDemod("0 0 1 0", FALSE) && test(DEMOD_BIa, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5) ) {
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if ( ASKbiphaseDemod("0 0 1 2", FALSE) && test(DEMOD_BIa, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5) ) {
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tests[hits].modulation = DEMOD_BIa;
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tests[hits].bitrate = bitRate;
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tests[hits].inverted = TRUE;
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@ -484,16 +488,18 @@ bool tryDetectModulation(){
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//undo trim from nrz
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save_restoreGB(0);
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// skip first 160 samples to allow antenna to settle in (psk gets inverted occasionally otherwise)
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CmdLtrim("160");
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clk = GetPskClock("", FALSE, FALSE);
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if (clk>0) {
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if ( PSKDemod("0 0 1", FALSE) && test(DEMOD_PSK1, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5)) {
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if ( PSKDemod("0 0 6", FALSE) && test(DEMOD_PSK1, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5)) {
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tests[hits].modulation = DEMOD_PSK1;
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tests[hits].bitrate = bitRate;
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tests[hits].inverted = FALSE;
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tests[hits].block0 = PackBits(tests[hits].offset, 32, DemodBuffer);
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++hits;
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}
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if ( PSKDemod("0 1 1", FALSE) && test(DEMOD_PSK1, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5)) {
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if ( PSKDemod("0 1 6", FALSE) && test(DEMOD_PSK1, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5)) {
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tests[hits].modulation = DEMOD_PSK1;
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tests[hits].bitrate = bitRate;
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tests[hits].inverted = TRUE;
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@ -501,7 +507,7 @@ bool tryDetectModulation(){
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++hits;
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}
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// PSK2 - needs a call to psk1TOpsk2.
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if ( PSKDemod("0 0 1", FALSE)) {
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if ( PSKDemod("0 0 6", FALSE)) {
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psk1TOpsk2(DemodBuffer, DemodBufferLen);
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if (test(DEMOD_PSK2, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5)){
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tests[hits].modulation = DEMOD_PSK2;
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@ -512,7 +518,7 @@ bool tryDetectModulation(){
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}
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} // inverse waves does not affect this demod
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// PSK3 - needs a call to psk1TOpsk2.
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if ( PSKDemod("0 0 1", FALSE)) {
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if ( PSKDemod("0 0 6", FALSE)) {
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psk1TOpsk2(DemodBuffer, DemodBufferLen);
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if (test(DEMOD_PSK3, &tests[hits].offset, &bitRate, clk, &tests[hits].Q5)){
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tests[hits].modulation = DEMOD_PSK3;
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@ -609,31 +615,30 @@ bool testQ5(uint8_t mode, uint8_t *offset, int *fndBitRate, uint8_t clk){
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if ( DemodBufferLen < 64 ) return FALSE;
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uint8_t si = 0;
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for (uint8_t idx = 0; idx < 64; idx++){
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for (uint8_t idx = 28; idx < 64; idx++){
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si = idx;
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if ( PackBits(si, 32, DemodBuffer) == 0x00 ) continue;
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if ( PackBits(si, 28, DemodBuffer) == 0x00 ) continue;
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uint8_t safer = PackBits(si, 4, DemodBuffer); si += 4; //master key
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uint8_t resv = PackBits(si, 8, DemodBuffer); si += 8;
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// 2nibble must be zeroed.
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// moved test to here, since this gets most faults first.
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if (safer != 0x6) continue;
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if ( resv > 0x00) continue;
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//uint8_t pageSel = PackBits(si, 1, DemodBuffer); si += 1;
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//uint8_t fastWrite = PackBits(si, 1, DemodBuffer); si += 1;
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si += 1+1;
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int bitRate = PackBits(si, 5, DemodBuffer)*2 + 2; si += 5; //bit rate
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if (bitRate > 128) continue;
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if (bitRate > 128 || bitRate < 8) continue;
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si += 1+1+2+1;
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//uint8_t AOR = PackBits(si, 1, DemodBuffer); si += 1; //bit 15 extended mode
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//uint8_t AOR = PackBits(si, 1, DemodBuffer); si += 1;
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//uint8_t PWD = PackBits(si, 1, DemodBuffer); si += 1;
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//uint8_t pskcr = PackBits(si, 2, DemodBuffer); si += 2; //could check psk cr
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//uint8_t inverse = PackBits(si, 1, DemodBuffer); si += 1;
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uint8_t modread = PackBits(si, 3, DemodBuffer); si += 3; //bit 24, 30, 31 could be tested for 0 if not extended mode
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//uint8_t maxBlk = PackBits(si, 2, DemodBuffer); si += 2;
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si += 1+1+2+1;
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uint8_t modread = PackBits(si, 3, DemodBuffer); si += 3;
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uint8_t maxBlk = PackBits(si, 3, DemodBuffer); si += 3;
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//uint8_t ST = PackBits(si, 1, DemodBuffer); si += 1;
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if (maxBlk == 0) continue;
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//test modulation
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if (!testQ5Modulation(mode, modread)) continue;
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if (bitRate != clk) continue;
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@ -646,7 +651,7 @@ bool testQ5(uint8_t mode, uint8_t *offset, int *fndBitRate, uint8_t clk){
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}
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bool testBitRate(uint8_t readRate, uint8_t clk){
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uint8_t expected[8] = {8, 16, 32, 40, 50, 64, 100, 128};
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uint8_t expected[] = {8, 16, 32, 40, 50, 64, 100, 128};
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if (expected[readRate] == clk)
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return true;
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@ -657,9 +662,9 @@ bool test(uint8_t mode, uint8_t *offset, int *fndBitRate, uint8_t clk, bool *Q5)
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if ( DemodBufferLen < 64 ) return FALSE;
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uint8_t si = 0;
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for (uint8_t idx = 0; idx < 64; idx++){
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for (uint8_t idx = 28; idx < 64; idx++){
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si = idx;
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if ( PackBits(si, 32, DemodBuffer) == 0x00 ) continue;
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if ( PackBits(si, 28, DemodBuffer) == 0x00 ) continue;
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uint8_t safer = PackBits(si, 4, DemodBuffer); si += 4; //master key
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uint8_t resv = PackBits(si, 4, DemodBuffer); si += 4; //was 7 & +=7+3 //should be only 4 bits if extended mode
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@ -668,7 +673,7 @@ bool test(uint8_t mode, uint8_t *offset, int *fndBitRate, uint8_t clk, bool *Q5)
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if ( resv > 0x00) continue;
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uint8_t xtRate = PackBits(si, 3, DemodBuffer); si += 3; //extended mode part of rate
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int bitRate = PackBits(si, 3, DemodBuffer); si += 3; //bit rate
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int bitRate = PackBits(si, 3, DemodBuffer); si += 3; //bit rate
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if (bitRate > 7) continue;
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uint8_t extend = PackBits(si, 1, DemodBuffer); si += 1; //bit 15 extended mode
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uint8_t modread = PackBits(si, 5, DemodBuffer); si += 5+2+1;
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@ -713,8 +718,9 @@ void printT55xxBlock(const char *blockNum){
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for (; i < endpos; ++i)
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bits[i - config.offset]=DemodBuffer[i];
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//print second round of read data (more accurate due to antenna settling)
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blockData = PackBits(0, 32, bits);
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PrintAndLog(" %s | %08X | %s", blockNum, blockData, sprint_bin(bits,32));
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}
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@ -968,7 +974,7 @@ int CmdT55xxInfo(const char *Cmd){
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uint32_t fw = PackBits(si, 1, DemodBuffer); si += 1;
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uint32_t inv = PackBits(si, 1, DemodBuffer); si += 1;
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uint32_t por = PackBits(si, 1, DemodBuffer); si += 1;
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if (config.Q5) PrintAndLog("*** Warning *** Info read off a Q5 will not work as expected");
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if (config.Q5) PrintAndLog("*** Warning *** Config Info read off a Q5 will not display as expected");
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PrintAndLog("");
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PrintAndLog("-- T55xx Configuration & Tag Information --------------------");
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PrintAndLog("-------------------------------------------------------------");
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@ -1269,8 +1275,8 @@ static command_t CommandTable[] =
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{"read", CmdT55xxReadBlock, 0, "b <block> p [password] [o] [1] -- Read T55xx block data. Optional [p password], [override], [page1]"},
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{"resetread",CmdResetRead, 0, "Send Reset Cmd then lf read the stream to attempt to identify the start of it (needs a demod and/or plot after)"},
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{"write", CmdT55xxWriteBlock,0, "b <block> d <data> p [password] [1] -- Write T55xx block data. Optional [p password], [page1]"},
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{"trace", CmdT55xxReadTrace, 0, "[1] Show T55xx traceability data (page 1/ blk 0-1)"},
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{"info", CmdT55xxInfo, 0, "[1] Show T55xx configuration data (page 0/ blk 0)"},
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{"trace", CmdT55xxReadTrace, 0, "[1] Show T55x7 traceability data (page 1/ blk 0-1)"},
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{"info", CmdT55xxInfo, 0, "[1] Show T55x7 configuration data (page 0/ blk 0)"},
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{"dump", CmdT55xxDump, 0, "[password] [o] Dump T55xx card block 0-7. Optional [password], [override]"},
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{"special", special, 0, "Show block changes with 64 different offsets"},
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{"wakeup", CmdT55xxWakeUp, 0, "Send AOR wakeup command"},
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335
common/lfdemod.c
335
common/lfdemod.c
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@ -407,12 +407,12 @@ size_t fsk_wave_demod(uint8_t * dest, size_t size, uint8_t fchigh, uint8_t fclow
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if (currSample < (fclow-2)){ //0-5 = garbage noise
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//do nothing with extra garbage
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} else if (currSample < (fchigh-1)) { //6-8 = 8 sample waves
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if (LastSample > (fchigh-2) && preLastSample < (fchigh-1)){
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if (LastSample > (fchigh-2) && (preLastSample < (fchigh-1) || preLastSample == 0 )){
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dest[numBits-1]=1; //correct last 9 wave surrounded by 8 waves
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}
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dest[numBits++]=1;
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} else if (currSample > (fchigh+1) && !numBits) { //12 + and first bit = garbage
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} else if (currSample > (fchigh) && !numBits) { //12 + and first bit = garbage
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//do nothing with beginning garbage
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} else if (currSample == (fclow+1) && LastSample == (fclow-1)) { // had a 7 then a 9 should be two 8's
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dest[numBits++]=1;
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@ -439,12 +439,16 @@ size_t aggregate_bits(uint8_t *dest, size_t size, uint8_t rfLen,
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|
||||
//if lastval was 1, we have a 1->0 crossing
|
||||
if (dest[idx-1]==1) {
|
||||
if (!numBits && n < rfLen/fclow) {
|
||||
n=0;
|
||||
lastval = dest[idx];
|
||||
continue;
|
||||
if (!numBits) {
|
||||
if (n < rfLen/fclow) {
|
||||
n=0;
|
||||
lastval = dest[idx];
|
||||
continue;
|
||||
}
|
||||
n = (n * fclow + rfLen/4) / rfLen;
|
||||
} else {
|
||||
n = (n * fclow + rfLen/2) / rfLen;
|
||||
}
|
||||
n = (n * fclow + rfLen/2) / rfLen;
|
||||
} else {// 0->1 crossing
|
||||
//test first bitsample too small
|
||||
if (!numBits && n < rfLen/fchigh) {
|
||||
|
|
@ -703,15 +707,26 @@ int PyramiddemodFSK(uint8_t *dest, size_t *size)
|
|||
return (int)startIdx;
|
||||
}
|
||||
|
||||
/*
|
||||
void dummy(char *fmt, ...){}
|
||||
|
||||
#ifndef ON_DEVICE
|
||||
#include "ui.h"
|
||||
#define prnt PrintAndLog
|
||||
#else
|
||||
|
||||
#define prnt dummy
|
||||
#endif
|
||||
*/
|
||||
// by marshmellow
|
||||
// to detect a wave that has heavily clipped (clean) samples
|
||||
uint8_t DetectCleanAskWave(uint8_t dest[], size_t size, uint8_t high, uint8_t low)
|
||||
{
|
||||
uint16_t allPeaks=1;
|
||||
uint16_t cntPeaks=0;
|
||||
size_t loopEnd = 512+60;
|
||||
size_t loopEnd = 512+160;
|
||||
if (loopEnd > size) loopEnd = size;
|
||||
for (size_t i=60; i<loopEnd; i++){
|
||||
for (size_t i=160; i<loopEnd; i++){
|
||||
if (dest[i]>low && dest[i]<high)
|
||||
allPeaks=0;
|
||||
else
|
||||
|
|
@ -722,7 +737,6 @@ uint8_t DetectCleanAskWave(uint8_t dest[], size_t size, uint8_t high, uint8_t lo
|
|||
}
|
||||
return allPeaks;
|
||||
}
|
||||
|
||||
// by marshmellow
|
||||
// to help detect clocks on heavily clipped samples
|
||||
// based on count of low to low
|
||||
|
|
@ -730,7 +744,7 @@ int DetectStrongAskClock(uint8_t dest[], size_t size, uint8_t high, uint8_t low)
|
|||
{
|
||||
uint8_t fndClk[] = {8,16,32,40,50,64,128};
|
||||
size_t startwave;
|
||||
size_t i = 0;
|
||||
size_t i = 100;
|
||||
size_t minClk = 255;
|
||||
// get to first full low to prime loop and skip incomplete first pulse
|
||||
while ((dest[i] < high) && (i < size))
|
||||
|
|
@ -753,6 +767,7 @@ int DetectStrongAskClock(uint8_t dest[], size_t size, uint8_t high, uint8_t low)
|
|||
minClk = i - startwave;
|
||||
}
|
||||
// set clock
|
||||
//prnt("minClk: %d",minClk);
|
||||
for (uint8_t clkCnt = 0; clkCnt<7; clkCnt++) {
|
||||
if (minClk >= fndClk[clkCnt]-(fndClk[clkCnt]/8) && minClk <= fndClk[clkCnt]+1)
|
||||
return fndClk[clkCnt];
|
||||
|
|
@ -770,8 +785,8 @@ int DetectASKClock(uint8_t dest[], size_t size, int *clock, int maxErr)
|
|||
uint8_t clk[] = {255,8,16,32,40,50,64,100,128,255};
|
||||
uint8_t clkEnd = 9;
|
||||
uint8_t loopCnt = 255; //don't need to loop through entire array...
|
||||
if (size <= loopCnt) return -1; //not enough samples
|
||||
|
||||
if (size <= loopCnt+60) return -1; //not enough samples
|
||||
size -= 60; //sometimes there is a strange end wave - filter out this....
|
||||
//if we already have a valid clock
|
||||
uint8_t clockFnd=0;
|
||||
for (;i<clkEnd;++i)
|
||||
|
|
@ -796,7 +811,6 @@ int DetectASKClock(uint8_t dest[], size_t size, int *clock, int maxErr)
|
|||
}
|
||||
}
|
||||
}
|
||||
|
||||
uint8_t ii;
|
||||
uint8_t clkCnt, tol = 0;
|
||||
uint16_t bestErr[]={1000,1000,1000,1000,1000,1000,1000,1000,1000};
|
||||
|
|
@ -838,7 +852,7 @@ int DetectASKClock(uint8_t dest[], size_t size, int *clock, int maxErr)
|
|||
}
|
||||
//if we found no errors then we can stop here and a low clock (common clocks)
|
||||
// this is correct one - return this clock
|
||||
//PrintAndLog("DEBUG: clk %d, err %d, ii %d, i %d",clk[clkCnt],errCnt,ii,i);
|
||||
//prnt("DEBUG: clk %d, err %d, ii %d, i %d",clk[clkCnt],errCnt,ii,i);
|
||||
if(errCnt==0 && clkCnt<7) {
|
||||
if (!clockFnd) *clock = clk[clkCnt];
|
||||
return ii;
|
||||
|
|
@ -874,7 +888,7 @@ int DetectPSKClock(uint8_t dest[], size_t size, int clock)
|
|||
uint8_t clk[]={255,16,32,40,50,64,100,128,255}; //255 is not a valid clock
|
||||
uint16_t loopCnt = 4096; //don't need to loop through entire array...
|
||||
if (size == 0) return 0;
|
||||
if (size<loopCnt) loopCnt = size;
|
||||
if (size<loopCnt) loopCnt = size-20;
|
||||
|
||||
//if we already have a valid clock quit
|
||||
size_t i=1;
|
||||
|
|
@ -888,17 +902,17 @@ int DetectPSKClock(uint8_t dest[], size_t size, int clock)
|
|||
uint16_t peaksdet[]={0,0,0,0,0,0,0,0,0};
|
||||
fc = countFC(dest, size, 0);
|
||||
if (fc!=2 && fc!=4 && fc!=8) return -1;
|
||||
//PrintAndLog("DEBUG: FC: %d",fc);
|
||||
//prnt("DEBUG: FC: %d",fc);
|
||||
|
||||
//find first full wave
|
||||
for (i=0; i<loopCnt; i++){
|
||||
for (i=160; i<loopCnt; i++){
|
||||
if (dest[i] < dest[i+1] && dest[i+1] >= dest[i+2]){
|
||||
if (waveStart == 0) {
|
||||
waveStart = i+1;
|
||||
//PrintAndLog("DEBUG: waveStart: %d",waveStart);
|
||||
//prnt("DEBUG: waveStart: %d",waveStart);
|
||||
} else {
|
||||
waveEnd = i+1;
|
||||
//PrintAndLog("DEBUG: waveEnd: %d",waveEnd);
|
||||
//prnt("DEBUG: waveEnd: %d",waveEnd);
|
||||
waveLenCnt = waveEnd-waveStart;
|
||||
if (waveLenCnt > fc){
|
||||
firstFullWave = waveStart;
|
||||
|
|
@ -909,7 +923,7 @@ int DetectPSKClock(uint8_t dest[], size_t size, int clock)
|
|||
}
|
||||
}
|
||||
}
|
||||
//PrintAndLog("DEBUG: firstFullWave: %d, waveLen: %d",firstFullWave,fullWaveLen);
|
||||
//prnt("DEBUG: firstFullWave: %d, waveLen: %d",firstFullWave,fullWaveLen);
|
||||
|
||||
//test each valid clock from greatest to smallest to see which lines up
|
||||
for(clkCnt=7; clkCnt >= 1 ; clkCnt--){
|
||||
|
|
@ -917,7 +931,7 @@ int DetectPSKClock(uint8_t dest[], size_t size, int clock)
|
|||
waveStart = 0;
|
||||
errCnt=0;
|
||||
peakcnt=0;
|
||||
//PrintAndLog("DEBUG: clk: %d, lastClkBit: %d",clk[clkCnt],lastClkBit);
|
||||
//prnt("DEBUG: clk: %d, lastClkBit: %d",clk[clkCnt],lastClkBit);
|
||||
|
||||
for (i = firstFullWave+fullWaveLen-1; i < loopCnt-2; i++){
|
||||
//top edge of wave = start of new wave
|
||||
|
|
@ -930,7 +944,7 @@ int DetectPSKClock(uint8_t dest[], size_t size, int clock)
|
|||
waveLenCnt = waveEnd-waveStart;
|
||||
if (waveLenCnt > fc){
|
||||
//if this wave is a phase shift
|
||||
//PrintAndLog("DEBUG: phase shift at: %d, len: %d, nextClk: %d, ii: %d, fc: %d",waveStart,waveLenCnt,lastClkBit+clk[clkCnt]-tol,ii+1,fc);
|
||||
//prnt("DEBUG: phase shift at: %d, len: %d, nextClk: %d, ii: %d, fc: %d",waveStart,waveLenCnt,lastClkBit+clk[clkCnt]-tol,ii+1,fc);
|
||||
if (i+1 >= lastClkBit + clk[clkCnt] - tol){ //should be a clock bit
|
||||
peakcnt++;
|
||||
lastClkBit+=clk[clkCnt];
|
||||
|
|
@ -959,11 +973,50 @@ int DetectPSKClock(uint8_t dest[], size_t size, int clock)
|
|||
if (peaksdet[i] > peaksdet[best]) {
|
||||
best = i;
|
||||
}
|
||||
//PrintAndLog("DEBUG: Clk: %d, peaks: %d, errs: %d, bestClk: %d",clk[iii],peaksdet[iii],bestErr[iii],clk[best]);
|
||||
//prnt("DEBUG: Clk: %d, peaks: %d, errs: %d, bestClk: %d",clk[iii],peaksdet[iii],bestErr[iii],clk[best]);
|
||||
}
|
||||
return clk[best];
|
||||
}
|
||||
|
||||
int DetectStrongNRZClk(uint8_t *dest, size_t size, int peak, int low){
|
||||
//find shortest transition from high to low
|
||||
size_t i = 0;
|
||||
size_t transition1 = 0;
|
||||
int lowestTransition = 255;
|
||||
uint8_t lastWasHigh=0;
|
||||
//find first valid beginning of a high/low wave
|
||||
if (dest[i] >= peak) {
|
||||
for (; i < size; i++) {
|
||||
if (dest[i] <= low) break;
|
||||
}
|
||||
lastWasHigh=0;
|
||||
} else if (dest[i] <= low) {
|
||||
for (; i < size; i++) {
|
||||
if (dest[i] >= peak) break;
|
||||
}
|
||||
lastWasHigh=1;
|
||||
} else {
|
||||
for (; i < size; i++) {
|
||||
if (dest[i] >= peak || dest[i] <= low) {
|
||||
lastWasHigh = (dest[i] >= peak);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
if (i==size) return 0;
|
||||
transition1 = i;
|
||||
|
||||
for (;i < size; i++) {
|
||||
if ((dest[i] >= peak && !lastWasHigh) || (dest[i] <= low && lastWasHigh)) {
|
||||
lastWasHigh = (dest[i] >= peak);
|
||||
if (i-transition1 < lowestTransition) lowestTransition = i-transition1;
|
||||
transition1 = i;
|
||||
}
|
||||
}
|
||||
if (lowestTransition == 255) lowestTransition = 0;
|
||||
return lowestTransition;
|
||||
}
|
||||
|
||||
//by marshmellow
|
||||
//detect nrz clock by reading #peaks vs no peaks(or errors)
|
||||
int DetectNRZClock(uint8_t dest[], size_t size, int clock)
|
||||
|
|
@ -972,8 +1025,7 @@ int DetectNRZClock(uint8_t dest[], size_t size, int clock)
|
|||
uint8_t clk[]={8,16,32,40,50,64,100,128,255};
|
||||
size_t loopCnt = 4096; //don't need to loop through entire array...
|
||||
if (size == 0) return 0;
|
||||
if (size<loopCnt) loopCnt = size;
|
||||
|
||||
if (size<loopCnt) loopCnt = size-20;
|
||||
//if we already have a valid clock quit
|
||||
for (; i < 8; ++i)
|
||||
if (clk[i] == clock) return clock;
|
||||
|
|
@ -982,38 +1034,80 @@ int DetectNRZClock(uint8_t dest[], size_t size, int clock)
|
|||
int peak, low;
|
||||
if (getHiLo(dest, loopCnt, &peak, &low, 75, 75) < 1) return 0;
|
||||
|
||||
//PrintAndLog("DEBUG: peak: %d, low: %d",peak,low);
|
||||
int lowestTransition = DetectStrongNRZClk(dest, size-20, peak, low);
|
||||
//prnt("DEBUG: peak: %d, low: %d",peak,low);
|
||||
size_t ii;
|
||||
uint8_t clkCnt;
|
||||
uint8_t tol = 0;
|
||||
uint16_t peakcnt=0;
|
||||
uint16_t peaksdet[]={0,0,0,0,0,0,0,0};
|
||||
uint16_t maxPeak=0;
|
||||
uint16_t smplCnt = 0;
|
||||
int16_t peakcnt = 0;
|
||||
int16_t peaksdet[] = {0,0,0,0,0,0,0,0};
|
||||
uint16_t maxPeak = 255;
|
||||
uint8_t firstpeak = 0;
|
||||
//test for large clipped waves
|
||||
for (i=0; i<loopCnt; i++){
|
||||
if (dest[i] >= peak || dest[i] <= low){
|
||||
peakcnt++;
|
||||
if (!firstpeak) continue;
|
||||
smplCnt++;
|
||||
} else {
|
||||
if (peakcnt>0 && maxPeak < peakcnt){
|
||||
maxPeak = peakcnt;
|
||||
firstpeak=1;
|
||||
if (smplCnt > 6 ){
|
||||
if (maxPeak > smplCnt){
|
||||
maxPeak = smplCnt;
|
||||
//prnt("maxPk: %d",maxPeak);
|
||||
}
|
||||
peakcnt++;
|
||||
//prnt("maxPk: %d, smplCnt: %d, peakcnt: %d",maxPeak,smplCnt,peakcnt);
|
||||
smplCnt=0;
|
||||
}
|
||||
peakcnt=0;
|
||||
}
|
||||
}
|
||||
uint8_t samePeak=0;
|
||||
uint8_t errBitHigh=0;
|
||||
peakcnt=0;
|
||||
//test each valid clock from smallest to greatest to see which lines up
|
||||
for(clkCnt=0; clkCnt < 8; ++clkCnt){
|
||||
//ignore clocks smaller than largest peak
|
||||
if (clk[clkCnt]<maxPeak) continue;
|
||||
|
||||
//ignore clocks smaller than smallest peak
|
||||
if (clk[clkCnt] < maxPeak - (clk[clkCnt]/4)) continue;
|
||||
//try lining up the peaks by moving starting point (try first 256)
|
||||
for (ii=0; ii< loopCnt; ++ii){
|
||||
for (ii=20; ii < loopCnt; ++ii){
|
||||
if ((dest[ii] >= peak) || (dest[ii] <= low)){
|
||||
peakcnt=0;
|
||||
// now that we have the first one lined up test rest of wave array
|
||||
for (i=0; i < ((int)((size-ii-tol)/clk[clkCnt])-1); ++i){
|
||||
if (dest[ii+(i*clk[clkCnt])]>=peak || dest[ii+(i*clk[clkCnt])]<=low){
|
||||
peakcnt++;
|
||||
uint8_t bitHigh =0;
|
||||
uint8_t ignoreCnt = 0;
|
||||
uint8_t ignoreWindow = 4;
|
||||
int lastBit = ii-clk[clkCnt];
|
||||
//loop through to see if this start location works
|
||||
for (i = ii; i < size-20; ++i) {
|
||||
// if we are at a clock bit
|
||||
if ((i >= lastBit + clk[clkCnt] - tol) && (i <= lastBit + clk[clkCnt] + tol)) {
|
||||
//test high/low
|
||||
if (dest[i] >= peak || dest[i] <= low) {
|
||||
if (samePeak) peakcnt--;
|
||||
bitHigh=1;
|
||||
peakcnt++;
|
||||
errBitHigh = 0;
|
||||
ignoreCnt = ignoreWindow;
|
||||
lastBit += clk[clkCnt];
|
||||
samePeak = 1;
|
||||
} else if (i == lastBit + clk[clkCnt] + tol) {
|
||||
lastBit += clk[clkCnt];
|
||||
samePeak = 0;
|
||||
}
|
||||
//else if not a clock bit and no peaks
|
||||
} else if (dest[i] < peak && dest[i] > low){
|
||||
samePeak = 0;
|
||||
if (ignoreCnt==0){
|
||||
bitHigh=0;
|
||||
if (errBitHigh==1) peakcnt--;
|
||||
errBitHigh=0;
|
||||
} else {
|
||||
ignoreCnt--;
|
||||
}
|
||||
// else if not a clock bit but we have a peak
|
||||
} else if ((dest[i]>=peak || dest[i]<=low) && (bitHigh==0)) {
|
||||
//error bar found no clock...
|
||||
errBitHigh=1;
|
||||
}
|
||||
}
|
||||
if(peakcnt>peaksdet[clkCnt]) {
|
||||
|
|
@ -1027,9 +1121,14 @@ int DetectNRZClock(uint8_t dest[], size_t size, int clock)
|
|||
for (iii=7; iii > 0; iii--){
|
||||
if (peaksdet[iii] > peaksdet[best]){
|
||||
best = iii;
|
||||
} else if (peaksdet[iii] == peaksdet[best] && lowestTransition){
|
||||
if (clk[iii] > (lowestTransition - (clk[iii]/8)) && clk[iii] < (lowestTransition + (clk[iii]/8))){
|
||||
best = iii;
|
||||
}
|
||||
}
|
||||
//PrintAndLog("DEBUG: Clk: %d, peaks: %d, errs: %d, bestClk: %d",clk[iii],peaksdet[iii],bestErr[iii],clk[best]);
|
||||
//prnt("DEBUG: Clk: %d, peaks: %d, maxPeak: %d, bestClk: %d, lowestTrs: %d",clk[iii],peaksdet[iii],maxPeak, clk[best], lowestTransition);
|
||||
}
|
||||
|
||||
return clk[best];
|
||||
}
|
||||
|
||||
|
|
@ -1089,123 +1188,37 @@ int indala26decode(uint8_t *bitStream, size_t *size, uint8_t *invert)
|
|||
return (int) startidx;
|
||||
}
|
||||
|
||||
// by marshmellow - demodulate NRZ wave (both similar enough)
|
||||
// by marshmellow - demodulate NRZ wave
|
||||
// peaks invert bit (high=1 low=0) each clock cycle = 1 bit determined by last peak
|
||||
// there probably is a much simpler way to do this....
|
||||
int nrzRawDemod(uint8_t *dest, size_t *size, int *clk, int *invert, int maxErr)
|
||||
{
|
||||
int nrzRawDemod(uint8_t *dest, size_t *size, int *clk, int *invert){
|
||||
if (justNoise(dest, *size)) return -1;
|
||||
*clk = DetectNRZClock(dest, *size, *clk);
|
||||
if (*clk==0) return -2;
|
||||
size_t i, gLen = 4096;
|
||||
if (gLen>*size) gLen = *size;
|
||||
if (gLen>*size) gLen = *size-20;
|
||||
int high, low;
|
||||
if (getHiLo(dest, gLen, &high, &low, 75, 75) < 1) return -3; //25% fuzz on high 25% fuzz on low
|
||||
int lastBit = 0; //set first clock check
|
||||
size_t iii = 0, bitnum = 0; //bitnum counter
|
||||
uint16_t errCnt = 0, MaxBits = 1000;
|
||||
size_t bestErrCnt = maxErr+1;
|
||||
size_t bestPeakCnt = 0, bestPeakStart = 0;
|
||||
uint8_t bestFirstPeakHigh=0, firstPeakHigh=0, curBit=0, bitHigh=0, errBitHigh=0;
|
||||
uint8_t tol = 1; //clock tolerance adjust - waves will be accepted as within the clock if they fall + or - this value + clock from last valid wave
|
||||
uint16_t peakCnt=0;
|
||||
uint8_t ignoreWindow=4;
|
||||
uint8_t ignoreCnt=ignoreWindow; //in case of noise near peak
|
||||
//loop to find first wave that works - align to clock
|
||||
for (iii=0; iii < gLen; ++iii){
|
||||
if ((dest[iii]>=high) || (dest[iii]<=low)){
|
||||
if (dest[iii]>=high) firstPeakHigh=1;
|
||||
else firstPeakHigh=0;
|
||||
lastBit=iii-*clk;
|
||||
peakCnt=0;
|
||||
errCnt=0;
|
||||
//loop through to see if this start location works
|
||||
for (i = iii; i < *size; ++i) {
|
||||
// if we are at a clock bit
|
||||
if ((i >= lastBit + *clk - tol) && (i <= lastBit + *clk + tol)) {
|
||||
//test high/low
|
||||
if (dest[i] >= high || dest[i] <= low) {
|
||||
bitHigh = 1;
|
||||
peakCnt++;
|
||||
errBitHigh = 0;
|
||||
ignoreCnt = ignoreWindow;
|
||||
lastBit += *clk;
|
||||
} else if (i == lastBit + *clk + tol) {
|
||||
lastBit += *clk;
|
||||
}
|
||||
//else if no bars found
|
||||
} else if (dest[i] < high && dest[i] > low){
|
||||
if (ignoreCnt==0){
|
||||
bitHigh=0;
|
||||
if (errBitHigh==1) errCnt++;
|
||||
errBitHigh=0;
|
||||
} else {
|
||||
ignoreCnt--;
|
||||
}
|
||||
} else if ((dest[i]>=high || dest[i]<=low) && (bitHigh==0)) {
|
||||
//error bar found no clock...
|
||||
errBitHigh=1;
|
||||
}
|
||||
if (((i-iii) / *clk)>=MaxBits) break;
|
||||
}
|
||||
//we got more than 64 good bits and not all errors
|
||||
if (((i-iii) / *clk) > 64 && (errCnt <= (maxErr))) {
|
||||
//possible good read
|
||||
if (!errCnt || peakCnt > bestPeakCnt){
|
||||
bestFirstPeakHigh=firstPeakHigh;
|
||||
bestErrCnt = errCnt;
|
||||
bestPeakCnt = peakCnt;
|
||||
bestPeakStart = iii;
|
||||
if (!errCnt) break; //great read - finish
|
||||
}
|
||||
}
|
||||
|
||||
uint8_t bit=0;
|
||||
//convert wave samples to 1's and 0's
|
||||
for(i=20; i < *size-20; i++){
|
||||
if (dest[i] >= high) bit = 1;
|
||||
if (dest[i] <= low) bit = 0;
|
||||
dest[i] = bit;
|
||||
}
|
||||
//now demod based on clock (rf/32 = 32 1's for one 1 bit, 32 0's for one 0 bit)
|
||||
size_t lastBit = 0;
|
||||
size_t numBits = 0;
|
||||
for(i=21; i < *size-20; i++) {
|
||||
//if transition detected or large number of same bits - store the passed bits
|
||||
if (dest[i] != dest[i-1] || (i-lastBit) == (10 * *clk)) {
|
||||
memset(dest+numBits, dest[i-1] ^ *invert, (i - lastBit + (*clk/4)) / *clk);
|
||||
numBits += (i - lastBit + (*clk/4)) / *clk;
|
||||
lastBit = i-1;
|
||||
}
|
||||
}
|
||||
//PrintAndLog("DEBUG: bestErrCnt: %d, maxErr: %d, bestStart: %d, bestPeakCnt: %d, bestPeakStart: %d",bestErrCnt,maxErr,bestStart,bestPeakCnt,bestPeakStart);
|
||||
if (bestErrCnt > maxErr) return bestErrCnt;
|
||||
|
||||
//best run is good enough set to best run and set overwrite BinStream
|
||||
lastBit = bestPeakStart - *clk;
|
||||
memset(dest, bestFirstPeakHigh^1, bestPeakStart / *clk);
|
||||
bitnum += (bestPeakStart / *clk);
|
||||
for (i = bestPeakStart; i < *size; ++i) {
|
||||
// if expecting a clock bit
|
||||
if ((i >= lastBit + *clk - tol) && (i <= lastBit + *clk + tol)) {
|
||||
// test high/low
|
||||
if (dest[i] >= high || dest[i] <= low) {
|
||||
peakCnt++;
|
||||
bitHigh = 1;
|
||||
errBitHigh = 0;
|
||||
ignoreCnt = ignoreWindow;
|
||||
curBit = *invert;
|
||||
if (dest[i] >= high) curBit ^= 1;
|
||||
dest[bitnum++] = curBit;
|
||||
lastBit += *clk;
|
||||
//else no bars found in clock area
|
||||
} else if (i == lastBit + *clk + tol) {
|
||||
dest[bitnum++] = curBit;
|
||||
lastBit += *clk;
|
||||
}
|
||||
//else if no bars found
|
||||
} else if (dest[i] < high && dest[i] > low){
|
||||
if (ignoreCnt == 0){
|
||||
bitHigh = 0;
|
||||
if (errBitHigh == 1){
|
||||
dest[bitnum++] = 7;
|
||||
errCnt++;
|
||||
}
|
||||
errBitHigh=0;
|
||||
} else {
|
||||
ignoreCnt--;
|
||||
}
|
||||
} else if ((dest[i] >= high || dest[i] <= low) && (bitHigh == 0)) {
|
||||
//error bar found no clock...
|
||||
errBitHigh=1;
|
||||
}
|
||||
if (bitnum >= MaxBits) break;
|
||||
}
|
||||
*size = bitnum;
|
||||
return bestErrCnt;
|
||||
*size = numBits;
|
||||
return 0;
|
||||
}
|
||||
|
||||
//by marshmellow
|
||||
|
|
@ -1405,6 +1418,7 @@ int pskRawDemod(uint8_t dest[], size_t *size, int *clock, int *invert)
|
|||
uint16_t loopCnt = 4096; //don't need to loop through entire array...
|
||||
if (*size<loopCnt) loopCnt = *size;
|
||||
|
||||
size_t numBits=0;
|
||||
uint8_t curPhase = *invert;
|
||||
size_t i, waveStart=1, waveEnd=0, firstFullWave=0, lastClkBit=0;
|
||||
uint8_t fc=0, fullWaveLen=0, tol=1;
|
||||
|
|
@ -1421,7 +1435,7 @@ int pskRawDemod(uint8_t dest[], size_t *size, int *clock, int *invert)
|
|||
waveEnd = i+1;
|
||||
//PrintAndLog("DEBUG: waveEnd: %d",waveEnd);
|
||||
waveLenCnt = waveEnd-waveStart;
|
||||
if (waveLenCnt > fc && waveStart > fc){ //not first peak and is a large wave
|
||||
if (waveLenCnt > fc && waveStart > fc && !(waveLenCnt > fc+2)){ //not first peak and is a large wave but not out of whack
|
||||
lastAvgWaveVal = avgWaveVal/(waveLenCnt);
|
||||
firstFullWave = waveStart;
|
||||
fullWaveLen=waveLenCnt;
|
||||
|
|
@ -1434,14 +1448,21 @@ int pskRawDemod(uint8_t dest[], size_t *size, int *clock, int *invert)
|
|||
}
|
||||
avgWaveVal += dest[i+2];
|
||||
}
|
||||
if (firstFullWave == 0) {
|
||||
// no phase shift detected - could be all 1's or 0's - doesn't matter where we start
|
||||
// so skip a little to ensure we are past any Start Signal
|
||||
firstFullWave = 160;
|
||||
memset(dest, curPhase, firstFullWave / *clock);
|
||||
} else {
|
||||
memset(dest, curPhase^1, firstFullWave / *clock);
|
||||
}
|
||||
//advance bits
|
||||
numBits += (firstFullWave / *clock);
|
||||
//set start of wave as clock align
|
||||
lastClkBit = firstFullWave;
|
||||
//PrintAndLog("DEBUG: firstFullWave: %d, waveLen: %d",firstFullWave,fullWaveLen);
|
||||
lastClkBit = firstFullWave; //set start of wave as clock align
|
||||
//PrintAndLog("DEBUG: clk: %d, lastClkBit: %d", *clock, lastClkBit);
|
||||
waveStart = 0;
|
||||
size_t numBits=0;
|
||||
//set skipped bits
|
||||
memset(dest, curPhase^1, firstFullWave / *clock);
|
||||
numBits += (firstFullWave / *clock);
|
||||
dest[numBits++] = curPhase; //set first read bit
|
||||
for (i = firstFullWave + fullWaveLen - 1; i < *size-3; i++){
|
||||
//top edge of wave = start of new wave
|
||||
|
|
|
|||
|
|
@ -32,7 +32,7 @@ int getHiLo(uint8_t *BitStream, size_t size, int *high, int *low, uint8_t f
|
|||
uint32_t manchesterEncode2Bytes(uint16_t datain);
|
||||
int ManchesterEncode(uint8_t *BitStream, size_t size);
|
||||
int manrawdecode(uint8_t *BitStream, size_t *size, uint8_t invert);
|
||||
int nrzRawDemod(uint8_t *dest, size_t *size, int *clk, int *invert, int maxErr);
|
||||
int nrzRawDemod(uint8_t *dest, size_t *size, int *clk, int *invert);
|
||||
uint8_t parityTest(uint32_t bits, uint8_t bitLen, uint8_t pType);
|
||||
uint8_t preambleSearch(uint8_t *BitStream, uint8_t *preamble, size_t pLen, size_t *size, size_t *startIdx);
|
||||
int pskRawDemod(uint8_t dest[], size_t *size, int *clock, int *invert);
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue