ADD: @pwpivi 's latest fixes for bigbuff

[proxmark3-svn] / armsrc / iso14443a.c

diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index 354b829c94b041c090ebfed7611d0507db91c21d..9b7efaf6834bb5e4e98b4ca72be5470348c35607 100644 (file)
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -568,11 +568,8 @@ void RAMFUNC SniffIso14443a(uint8_t param) {
        
        LEDsoff();
 
-       // We won't start recording the frames that we acquire until we trigger;
-       // a good trigger condition to get started is probably when we see a
-       // response from the tag.
-       // triggered == FALSE -- to wait first for card
-       bool triggered = !(param & 0x03); 
+
+       iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
        
        // Allocate memory from BigBuf for some buffers
        // free all previous allocations first
@@ -600,8 +597,6 @@ void RAMFUNC SniffIso14443a(uint8_t param) {
        bool TagIsActive = FALSE;
        bool ReaderIsActive = FALSE;
        
-       iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
-
        // Set up the demodulator for tag -> reader responses.
        DemodInit(receivedResponse, receivedResponsePar);
        
@@ -611,6 +606,12 @@ void RAMFUNC SniffIso14443a(uint8_t param) {
        // Setup and start DMA.
        FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
        
+       // We won't start recording the frames that we acquire until we trigger;
+       // a good trigger condition to get started is probably when we see a
+       // response from the tag.
+       // triggered == FALSE -- to wait first for card
+       bool triggered = !(param & 0x03); 
+       
        // And now we loop, receiving samples.
        for(uint32_t rsamples = 0; TRUE; ) {
 
@@ -673,7 +674,6 @@ void RAMFUNC SniffIso14443a(uint8_t param) {
                                        }
                                        /* And ready to receive another command. */
                                        UartReset();
-                                       //UartInit(receivedCmd, receivedCmdPar);
                                        /* And also reset the demod code, which might have been */
                                        /* false-triggered by the commands from the reader. */
                                        DemodReset();
@@ -1092,6 +1092,9 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
                .modulation_n = 0
        };
   
+       // We need to listen to the high-frequency, peak-detected path.
+       iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+
        BigBuf_free_keep_EM();
 
        // allocate buffers:
@@ -1120,9 +1123,6 @@ void SimulateIso14443aTag(int tagType, int flags, int uid_2nd, byte_t* data)
        int happened2 = 0;
        int cmdsRecvd = 0;
 
-       // We need to listen to the high-frequency, peak-detected path.
-       iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-
        cmdsRecvd = 0;
        tag_response_info_t* p_response;
 
@@ -2210,6 +2210,10 @@ void ReaderMifare(bool first_try)
        uint8_t receivedAnswer[MAX_MIFARE_FRAME_SIZE];
        uint8_t receivedAnswerPar[MAX_MIFARE_PARITY_SIZE];
 
+       if (first_try) { 
+               iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
+       }
+       
        // free eventually allocated BigBuf memory. We want all for tracing.
        BigBuf_free();
        
@@ -2238,7 +2242,6 @@ void ReaderMifare(bool first_try)
 
        if (first_try) { 
                mf_nr_ar3 = 0;
-               iso14443a_setup(FPGA_HF_ISO14443A_READER_MOD);
                sync_time = GetCountSspClk() & 0xfffffff8;
                sync_cycles = 65536;                                                                    // theory: Mifare Classic's random generator repeats every 2^16 cycles (and so do the nonces).
                nt_attacked = 0;
@@ -2397,9 +2400,11 @@ void ReaderMifare(bool first_try)
                
        cmd_send(CMD_ACK,isOK,0,0,buf,28);
 
-       set_tracing(FALSE);
+       // Thats it...
        FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        LEDsoff();
+
+       set_tracing(FALSE);
 }
 
 
@@ -2456,13 +2461,6 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
        uint32_t ar_nr_responses[] = {0,0,0,0,0,0,0,0,0,0};
        uint8_t ar_nr_collected = 0;
 
-       // free eventually allocated BigBuf memory but keep Emulator Memory
-       BigBuf_free_keep_EM();
-
-       // clear trace
-       clear_trace();
-       set_tracing(TRUE);
-
        // Authenticate response - nonce
        uint32_t nonce = bytes_to_num(rAUTH_NT, 4);
        
@@ -2509,10 +2507,6 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                rUIDBCC2[4] = rUIDBCC2[0] ^ rUIDBCC2[1] ^ rUIDBCC2[2] ^ rUIDBCC2[3];
        }
 
-       // We need to listen to the high-frequency, peak-detected path.
-       iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
-
-
        if (MF_DBGLEVEL >= 1)   {
                if (!_7BUID) {
                        Dbprintf("4B UID: %02x%02x%02x%02x", 
@@ -2524,6 +2518,17 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                }
        }
 
+       // We need to listen to the high-frequency, peak-detected path.
+       iso14443a_setup(FPGA_HF_ISO14443A_TAGSIM_LISTEN);
+
+       // free eventually allocated BigBuf memory but keep Emulator Memory
+       BigBuf_free_keep_EM();
+
+       // clear trace
+       clear_trace();
+       set_tracing(TRUE);
+
+
        bool finished = FALSE;
        while (!BUTTON_PRESS() && !finished) {
                WDT_HIT();
@@ -2935,9 +2940,6 @@ void RAMFUNC SniffMifare(uint8_t param) {
        // bit 0 - trigger from first card answer
        // bit 1 - trigger from first reader 7-bit request
 
-       // free eventually allocated BigBuf memory
-       BigBuf_free();
-       
        // C(red) A(yellow) B(green)
        LEDsoff();
        // init trace buffer
@@ -2953,6 +2955,10 @@ void RAMFUNC SniffMifare(uint8_t param) {
        uint8_t receivedResponse[MAX_MIFARE_FRAME_SIZE];
        uint8_t receivedResponsePar[MAX_MIFARE_PARITY_SIZE];
 
+       iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
+
+       // free eventually allocated BigBuf memory
+       BigBuf_free();
        // allocate the DMA buffer, used to stream samples from the FPGA
        uint8_t *dmaBuf = BigBuf_malloc(DMA_BUFFER_SIZE);
        uint8_t *data = dmaBuf;
@@ -2962,8 +2968,6 @@ void RAMFUNC SniffMifare(uint8_t param) {
        bool ReaderIsActive = FALSE;
        bool TagIsActive = FALSE;
 
-       iso14443a_setup(FPGA_HF_ISO14443A_SNIFFER);
-
        // Set up the demodulator for tag -> reader responses.
        DemodInit(receivedResponse, receivedResponsePar);
 
@@ -3043,7 +3047,6 @@ void RAMFUNC SniffMifare(uint8_t param) {
                                        if (MfSniffLogic(receivedCmd, Uart.len, Uart.parity, Uart.bitCount, TRUE)) break;
 
                                        /* And ready to receive another command. */
-                                       //UartInit(receivedCmd, receivedCmdPar);
                                        UartReset();
                                        
                                        /* And also reset the demod code */