I am trying to customise a raw read transaction with a mifare card using a PN7150. I am using the NXP NCI MCUXpresso example project, which is successfully working with the device.
In the NXP-NCI MXUXpresso example project (detailed in AN11990) there is a function in nfc_task.c called PCD_MIFARE_scenario. The read section looks something like this:
void PCD_MIFARE_scenario (void)
{
#define BLK_NB_MFC 4
#define KEY_MFC 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF
#define DATA_WRITE_MFC 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff
bool status;
unsigned char Resp[256];
unsigned char RespSize;
/* Authenticate sector 1 with generic keys */
unsigned char Auth[] = {0x40, BLK_NB_MFC/4, 0x10, KEY_MFC};
/* Read block 4 */
unsigned char Read[] = {0x10, 0x30, BLK_NB_MFC};
/* Authenticate */
status = NxpNci_ReaderTagCmd(Auth, sizeof(Auth), Resp, &RespSize);
if((status == NFC_ERROR) || (Resp[RespSize-1] != 0))
{
PRINTF(" Authenticate sector %d failed with error 0x%02x\n", Auth[1], Resp[RespSize-1]);
return;
}
PRINTF(" Authenticate sector %d succeed\n", Auth[1]);
/* Read block */
status = NxpNci_ReaderTagCmd(Read, sizeof(Read), Resp, &RespSize);
if((status == NFC_ERROR) || (Resp[RespSize-1] != 0))
{
PRINTF(" Read block %d failed with error 0x%02x\n", Read[2], Resp[RespSize-1]);
return;
}
PRINTF(" Read block %d:", Read[2]); print_buf(" ", (Resp+1), RespSize-2);
Is there documentation for this command format? For example, how should I know that the AUTH command starts with 0x40, but the read command starts with 0x10? Where can I find out more about these raw commands?
