X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/c2df2883f802cea761bcf368500b176d83546a41..cd79d9722300fa22ee1571eab241512ee21ed14e:/armsrc/iso14443b.c diff --git a/armsrc/iso14443b.c b/armsrc/iso14443b.c index bfcf83c6..5d506c3b 100644 --- a/armsrc/iso14443b.c +++ b/armsrc/iso14443b.c @@ -40,7 +40,7 @@ //#define SEND4STUFFBIT(x) ToSendStuffBit(x); // iceman, this threshold value, what makes 8 a good amplituted for this IQ values? #ifndef SUBCARRIER_DETECT_THRESHOLD -# define SUBCARRIER_DETECT_THRESHOLD 6 +# define SUBCARRIER_DETECT_THRESHOLD 8 #endif static void iso14b_set_timeout(uint32_t timeout); @@ -237,7 +237,7 @@ static void CodeIso14443bAsTag(const uint8_t *cmd, int len) { * Card data transmission * - TR1 * - SOF - * - data (each bytes is: 1startbit,8bits, 1stopbit) + * - data (each bytes is: 1startbit, 8bits, 1stopbit) * - CRC_B * - EOF * @@ -280,13 +280,14 @@ static void CodeIso14443bAsTag(const uint8_t *cmd, int len) { // Data bits b = cmd[i]; for(j = 0; j < 8; ++j) { - if(b & 1) { - SEND4STUFFBIT(1); - //ToSendStuffBit(1); - } else { - SEND4STUFFBIT(0); - //ToSendStuffBit(0); - } + // if(b & 1) { + // SEND4STUFFBIT(1); + // //ToSendStuffBit(1); + // } else { + // SEND4STUFFBIT(0); + // //ToSendStuffBit(0); + // } + SEND4STUFFBIT( b & 1 ); b >>= 1; } @@ -802,10 +803,9 @@ static RAMFUNC int Handle14443bTagSamplesDemod(int ci, int cq) { case DEMOD_UNSYNCD: CHECK_FOR_SUBCARRIER(); - if (MF_DBGLEVEL >= 3) { Dbprintf("Demod.state = %d", v); } // subcarrier detected - if(v > SUBCARRIER_DETECT_THRESHOLD) { + if (v > SUBCARRIER_DETECT_THRESHOLD) { Demod.state = DEMOD_PHASE_REF_TRAINING; Demod.sumI = ci; Demod.sumQ = cq; @@ -814,7 +814,7 @@ static RAMFUNC int Handle14443bTagSamplesDemod(int ci, int cq) { break; case DEMOD_PHASE_REF_TRAINING: - if(Demod.posCount < 8) { + if (Demod.posCount < 8) { CHECK_FOR_SUBCARRIER(); @@ -837,7 +837,7 @@ static RAMFUNC int Handle14443bTagSamplesDemod(int ci, int cq) { MAKE_SOFT_DECISION(); - if(v < 0) { // logic '0' detected + if (v < 0) { // logic '0' detected Demod.state = DEMOD_GOT_FALLING_EDGE_OF_SOF; Demod.posCount = 0; // start of SOF sequence } else { @@ -852,13 +852,13 @@ static RAMFUNC int Handle14443bTagSamplesDemod(int ci, int cq) { MAKE_SOFT_DECISION(); - if(v > 0) { + if (v > 0) { // low phase of SOF too short (< 9 etu). Note: spec is >= 10, but FPGA tends to "smear" edges - if(Demod.posCount < 8*2) { + if (Demod.posCount < 8*2) { Demod.state = DEMOD_UNSYNCD; } else { LED_C_ON(); // Got SOF - Demod.startTime = GetCountSspClk(); + //Demod.startTime = GetCountSspClk(); Demod.state = DEMOD_AWAITING_START_BIT; Demod.posCount = 0; Demod.len = 0; @@ -904,7 +904,7 @@ static RAMFUNC int Handle14443bTagSamplesDemod(int ci, int cq) { Demod.thisBit += v; Demod.shiftReg >>= 1; - // logic '1' + // OR in a logic '1' if (Demod.thisBit > 0) Demod.shiftReg |= 0x200; ++Demod.bitCount; @@ -923,7 +923,7 @@ static RAMFUNC int Handle14443bTagSamplesDemod(int ci, int cq) { } else { // this one is a bit hard, either its a correc byte or its unsynced. Demod.state = DEMOD_UNSYNCD; - Demod.endTime = GetCountSspClk(); + //Demod.endTime = GetCountSspClk(); LED_C_OFF(); // This is EOF (start, stop and all data bits == '0' @@ -1018,7 +1018,7 @@ static void GetTagSamplesFor14443bDemod() { Dbhexdump(ISO14443B_DMA_BUFFER_SIZE, (uint8_t *)dmaBuf, FALSE); if ( Demod.len > 0 ) - LogTrace(Demod.output, Demod.len, Demod.startTime, Demod.endTime, NULL, FALSE); + LogTrace(Demod.output, Demod.len, time_0, time_stop, NULL, FALSE); } @@ -1075,8 +1075,7 @@ static void TransmitFor14443b_AsReader(void) { // Code a layer 2 command (string of octets, including CRC) into ToSend[], // so that it is ready to transmit to the tag using TransmitFor14443b(). //----------------------------------------------------------------------------- -static void CodeIso14443bAsReader(const uint8_t *cmd, int len) -{ +static void CodeIso14443bAsReader(const uint8_t *cmd, int len) { /* * Reader data transmission: * - no modulation ONES @@ -1112,14 +1111,24 @@ static void CodeIso14443bAsReader(const uint8_t *cmd, int len) ToSendStuffBit(0); // Data bits b = cmd[i]; - if ( b & 1 ) ToSendStuffBit(1); else ToSendStuffBit(0); - if ( (b>>1) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); - if ( (b>>2) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); - if ( (b>>3) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); - if ( (b>>4) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); - if ( (b>>5) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); - if ( (b>>6) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); - if ( (b>>7) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); + // if ( b & 1 ) ToSendStuffBit(1); else ToSendStuffBit(0); + // if ( (b>>1) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); + // if ( (b>>2) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); + // if ( (b>>3) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); + // if ( (b>>4) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); + // if ( (b>>5) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); + // if ( (b>>6) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); + // if ( (b>>7) & 1) ToSendStuffBit(1); else ToSendStuffBit(0); + + ToSendStuffBit( b & 1); + ToSendStuffBit( (b>>1) & 1); + ToSendStuffBit( (b>>2) & 1); + ToSendStuffBit( (b>>3) & 1); + ToSendStuffBit( (b>>4) & 1); + ToSendStuffBit( (b>>5) & 1); + ToSendStuffBit( (b>>6) & 1); + ToSendStuffBit( (b>>7) & 1); + // Stop bit ToSendStuffBit(1); // EGT extra guard time @@ -1145,19 +1154,19 @@ static void CodeIso14443bAsReader(const uint8_t *cmd, int len) } -/** - Convenience function to encode, transmit and trace iso 14443b comms - **/ +/* +* Convenience function to encode, transmit and trace iso 14443b comms +*/ static void CodeAndTransmit14443bAsReader(const uint8_t *cmd, int len) { + + uint32_t time_start = GetCountSspClk(); CodeIso14443bAsReader(cmd, len); - - uint32_t time_start = GetCountSspClk(); TransmitFor14443b_AsReader(); - + if(trigger) LED_A_ON(); - + LogTrace(cmd, len, time_start, GetCountSspClk()-time_start, NULL, TRUE); } @@ -1630,11 +1639,11 @@ void RAMFUNC SnoopIso14443b(void) { if (triggered) LogTrace(Uart.output, Uart.byteCnt, time_start, time_stop, NULL, TRUE); - /* And ready to receive another command. */ - UartReset(); - /* And also reset the demod code, which might have been */ - /* false-triggered by the commands from the reader. */ - DemodReset(); + /* And ready to receive another command. */ + UartReset(); + /* And also reset the demod code, which might have been */ + /* false-triggered by the commands from the reader. */ + DemodReset(); } else { time_start = GetCountSspClk() - time_0; }