CHG: FpgaSetupDMA, handle when it returns NULL.

diff --git a/armsrc/iso14443a.c b/armsrc/iso14443a.c
index ca6fd960f774897f0efc4d04fd27cfd267d349e0..7822ee22cd678e71a5fc771c3d07afbc7d9d93da 100644 (file)
--- a/armsrc/iso14443a.c
+++ b/armsrc/iso14443a.c
@@ -551,7 +551,10 @@ void RAMFUNC SniffIso14443a(uint8_t param) {
        UartInit(receivedCmd, receivedCmdPar);
        
        // Setup and start DMA.
-       FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
+       if ( !FpgaSetupSscDma((uint8_t*) dmaBuf, DMA_BUFFER_SIZE) ){
+               if (MF_DBGLEVEL > 1) Dbprintf("FpgaSetupSscDma failed. Exiting"); 
+               return;
+       }
        
        // 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
@@ -1137,8 +1140,7 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
                } else if(receivedCmd[0] == ISO14443A_CMD_HALT) {       // Received a HALT
                        LogTrace(receivedCmd, Uart.len, Uart.startTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.endTime*16 - DELAY_AIR2ARM_AS_TAG, Uart.parity, TRUE);
                        p_response = NULL;
-               } else if(receivedCmd[0] == MIFARE_AUTH_KEYA || receivedCmd[0] == MIFARE_AUTH_KEYB) {   // Received an authentication request
-                                       
+               } else if(receivedCmd[0] == MIFARE_AUTH_KEYA || receivedCmd[0] == MIFARE_AUTH_KEYB) {   // Received an authentication request                           
                        if ( tagType == 7 ) {   // IF NTAG /EV1  0x60 == GET_VERSION, not a authentication request.
                                uint8_t emdata[10];
                                emlGetMemBt( emdata, 0, 8 );
@@ -1162,17 +1164,12 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
 
                        if ( (flags & FLAG_NR_AR_ATTACK) == FLAG_NR_AR_ATTACK ) {
                                if(ar_nr_collected < 2){
-                                       // Avoid duplicates... probably not necessary, nr should vary. 
-                                       // nr doesn't change in pm3's reading etc.  its fixed.
-                                       //if(ar_nr_responses[3] != nr){                                         
-                                               ar_nr_responses[ar_nr_collected*4]   = cuid;
-                                               ar_nr_responses[ar_nr_collected*4+1] = nonce;
-                                               ar_nr_responses[ar_nr_collected*4+2] = nr;
-                                               ar_nr_responses[ar_nr_collected*4+3] = ar;
-                                               ar_nr_collected++;
-                                       //}
+                                       ar_nr_responses[ar_nr_collected*4]   = cuid;
+                                       ar_nr_responses[ar_nr_collected*4+1] = nonce;
+                                       ar_nr_responses[ar_nr_collected*4+2] = nr;
+                                       ar_nr_responses[ar_nr_collected*4+3] = ar;
+                                       ar_nr_collected++;
                                }                       
-
                                if(ar_nr_collected > 1 ) {              
                                        if (MF_DBGLEVEL >= 2 && !(flags & FLAG_INTERACTIVE)) {
                                                        Dbprintf("Collected two pairs of AR/NR which can be used to extract keys from reader:");
@@ -1191,6 +1188,7 @@ void SimulateIso14443aTag(int tagType, int flags, byte_t* data) {
                                        memset(ar_nr_responses, 0x00, len);
                                }
                        }
+                       
                } else if (receivedCmd[0] == MIFARE_ULC_AUTH_1 ) { // ULC authentication, or Desfire Authentication
                } else if (receivedCmd[0] == MIFARE_ULEV1_AUTH) { // NTAG / EV-1 authentication
                        if ( tagType == 7 ) {
@@ -2535,6 +2533,7 @@ void Mifare1ksim(uint8_t flags, uint8_t exitAfterNReads, uint8_t arg2, uint8_t *
                }
                        
                // REQ or WUP request in ANY state and WUP in HALTED state
+               // this if-statement doesn't match the specification above. (iceman)
                if (len == 1 && ((receivedCmd[0] == ISO14443A_CMD_REQA && cardSTATE != MFEMUL_HALTED) || receivedCmd[0] == ISO14443A_CMD_WUPA)) {
                        selTimer = GetTickCount();
                        EmSendCmdEx(atqa, sizeof(atqa), (receivedCmd[0] == ISO14443A_CMD_WUPA));
@@ -2976,8 +2975,12 @@ void RAMFUNC SniffMifare(uint8_t param) {
        // Set up the demodulator for the reader -> tag commands
        UartInit(receivedCmd, receivedCmdPar);
 
-        // set transfer address and number of bytes. Start transfer.
-       FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
+       // Setup and start DMA.
+       // set transfer address and number of bytes. Start transfer.
+       if ( !FpgaSetupSscDma((uint8_t*) dmaBuf, DMA_BUFFER_SIZE) ){
+               if (MF_DBGLEVEL > 1) Dbprintf("FpgaSetupSscDma failed. Exiting"); 
+               return;
+       }
 
        LED_D_OFF();
 
@@ -3004,7 +3007,11 @@ void RAMFUNC SniffMifare(uint8_t param) {
                                maxDataLen = 0;
                                ReaderIsActive = FALSE;
                                TagIsActive = FALSE;
-                               FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE); // set transfer address and number of bytes. Start transfer.
+                               // Setup and start DMA. set transfer address and number of bytes. Start transfer.
+                               if ( !FpgaSetupSscDma((uint8_t*) dmaBuf, DMA_BUFFER_SIZE) ){
+                                       if (MF_DBGLEVEL > 1) Dbprintf("FpgaSetupSscDma failed. Exiting"); 
+                                       return;
+                               }                               
                        }
                }