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CHG: FpgaSetupDMA can fail and returns NULL. Added a check for it.

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This commit is contained in:
iceman1001 2016-04-26 21:31:43 +02:00
commit a287e8cfdd
1 changed files with 12 additions and 2 deletions
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14
armsrc/iclass.c
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@ -677,7 +677,11 @@ void RAMFUNC SnoopIClass(void)
FpgaSetupSsc();
upTo = dmaBuf;
lastRxCounter = DMA_BUFFER_SIZE;
FpgaSetupSscDma((uint8_t *)dmaBuf, DMA_BUFFER_SIZE);
// Setup and start DMA.
if ( !FpgaSetupSscDma((uint8_t*) dmaBuf, DMA_BUFFER_SIZE) ){
if (MF_DBGLEVEL > 1) Dbprintf("FpgaSetupSscDma failed. Exiting");
return;
}
// And the reader -> tag commands
memset(&Uart, 0, sizeof(Uart));
@ -1539,9 +1543,15 @@ static int GetIClassAnswer(uint8_t *receivedResponse, int maxLen, int *samples,
if (elapsed) (*elapsed)++;
}
if(AT91C_BASE_SSC->SSC_SR & (AT91C_SSC_RXRDY)) {
if(c < timeout) { c++; } else { return FALSE; }
if(c < timeout)
c++;
else
return FALSE;
b = (uint8_t)AT91C_BASE_SSC->SSC_RHR;
skip = !skip;
if(skip) continue;
if(ManchesterDecoding(b & 0x0f)) {