Merge pull request #548 from merlokk/mfsniff_fix

[proxmark3-svn] / armsrc / iso15693.c

diff --git a/armsrc/iso15693.c b/armsrc/iso15693.c
index 94040a85796a36eb38b7e5976b2339123845234f..e11e5a9ccc6e232fa7374bf2c7f5fb1e2390ec66 100644 (file)
--- a/armsrc/iso15693.c
+++ b/armsrc/iso15693.c
@@ -319,18 +319,7 @@ static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int *
                        // every other is Q. We just want power, so abs(I) + abs(Q) is
                        // close to what we want.
                        if(getNext) {
-                               int8_t r;
-
-                               if(b < 0) {
-                                       r = -b;
-                               } else {
-                                       r = b;
-                               }
-                               if(prev < 0) {
-                                       r -= prev;
-                               } else {
-                                       r += prev;
-                               }
+                               uint8_t r = ABS(b) + ABS(prev);
 
                                dest[c++] = (uint8_t)r;
 
@@ -367,7 +356,7 @@ static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int *
                        maxPos = i;
                }
        }
-       //      DbpString("SOF at %d, correlation %d", maxPos,max/(arraylen(FrameSOF)/skip));
+               // Dbprintf("SOF at %d, correlation %d", maxPos,max/(arraylen(FrameSOF)/skip));
 
        int k = 0; // this will be our return value
 
@@ -396,7 +385,7 @@ static int GetIso15693AnswerFromTag(uint8_t *receivedResponse, int maxLen, int *
                        corr1 *= 4;
        
                        if(corrEOF > corr1 && corrEOF > corr0) {
-       //                      DbpString("EOF at %d", i);
+                               // Dbprintf("EOF at %d", i);
                                break;
                        } else if(corr1 > corr0) {
                                i += arraylen(Logic1)/skip;
@@ -468,18 +457,7 @@ static int GetIso15693AnswerFromSniff(uint8_t *receivedResponse, int maxLen, int
                        // every other is Q. We just want power, so abs(I) + abs(Q) is
                        // close to what we want.
                        if(getNext) {
-                               int8_t r;
-
-                               if(b < 0) {
-                                       r = -b;
-                               } else {
-                                       r = b;
-                               }
-                               if(prev < 0) {
-                                       r -= prev;
-                               } else {
-                                       r += prev;
-                               }
+                               uint8_t r = ABS(b) + ABS(prev);
 
                                dest[c++] = (uint8_t)r;
 
@@ -648,18 +626,7 @@ void AcquireRawAdcSamplesIso15693(void)
                        // every other is Q. We just want power, so abs(I) + abs(Q) is
                        // close to what we want.
                        if(getNext) {
-                               int8_t r;
-
-                               if(b < 0) {
-                                       r = -b;
-                               } else {
-                                       r = b;
-                               }
-                               if(prev < 0) {
-                                       r -= prev;
-                               } else {
-                                       r += prev;
-                               }
+                               uint8_t r = ABS(b) + ABS(prev);
 
                                dest[c++] = (uint8_t)r;
 
@@ -713,18 +680,7 @@ void RecordRawAdcSamplesIso15693(void)
                        // every other is Q. We just want power, so abs(I) + abs(Q) is
                        // close to what we want.
                        if(getNext) {
-                               int8_t r;
-
-                               if(b < 0) {
-                                       r = -b;
-                               } else {
-                                       r = b;
-                               }
-                               if(prev < 0) {
-                                       r -= prev;
-                               } else {
-                                       r += prev;
-                               }
+                               uint8_t r = ABS(b) + ABS(prev);
 
                                dest[c++] = (uint8_t)r;
 
@@ -877,12 +833,12 @@ int SendDataTag(uint8_t *send, int sendlen, int init, int speed, uint8_t **recv)
        LED_C_OFF();
        LED_D_OFF();
        
+       if (init) Iso15693InitReader();
+
        int answerLen=0;
        uint8_t *answer = BigBuf_get_addr() + 3660;
        if (recv != NULL) memset(answer, 0, 100);
 
-       if (init) Iso15693InitReader();
-       
        if (!speed) {
                // low speed (1 out of 256)
                CodeIso15693AsReader256(send, sendlen);
@@ -999,10 +955,6 @@ void ReaderIso15693(uint32_t parameter)
        LED_C_OFF();
        LED_D_OFF();
 
-       uint8_t *answer1 = BigBuf_get_addr() + 3660;
-       uint8_t *answer2 = BigBuf_get_addr() + 3760;
-       uint8_t *answer3 = BigBuf_get_addr() + 3860;
-
        int answerLen1 = 0;
        int answerLen2 = 0;
        int answerLen3 = 0;
@@ -1013,19 +965,21 @@ void ReaderIso15693(uint32_t parameter)
        int elapsed = 0;
        uint8_t TagUID[8] = {0x00};
 
+       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 
+       uint8_t *answer1 = BigBuf_get_addr() + 3660;
+       uint8_t *answer2 = BigBuf_get_addr() + 3760;
+       uint8_t *answer3 = BigBuf_get_addr() + 3860;
        // Blank arrays
        memset(answer1, 0x00, 300);
 
-       FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
-
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
        // Setup SSC
        FpgaSetupSsc();
 
        // Start from off (no field generated)
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
-       SpinDelay(200);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       SpinDelay(200);
 
        // Give the tags time to energize
        FpgaWriteConfWord(FPGA_MAJOR_MODE_HF_READER_RX_XCORR);
@@ -1111,24 +1065,22 @@ void SimTagIso15693(uint32_t parameter, uint8_t *uid)
        LED_C_OFF();
        LED_D_OFF();
 
-       uint8_t *buf = BigBuf_get_addr() + 3660;
-       
        int answerLen1 = 0;
        int samples = 0;
        int tsamples = 0;
        int wait = 0;
        int elapsed = 0;
 
-       memset(buf, 0x00, 100);
-
        FpgaDownloadAndGo(FPGA_BITSTREAM_HF);
 
+       uint8_t *buf = BigBuf_get_addr() + 3660;
+       memset(buf, 0x00, 100);
+       
        SetAdcMuxFor(GPIO_MUXSEL_HIPKD);
-
        FpgaSetupSsc();
 
        // Start from off (no field generated)
-       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
+       FpgaWriteConfWord(FPGA_MAJOR_MODE_OFF);
        SpinDelay(200);
 
        LED_A_OFF();