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Added work with S-Block WTX in 14a apdu on arm side

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This commit is contained in:
merlokk 2017-11-11 22:56:50 +02:00
parent 298143218a
commit a63505c953
1 changed files with 16 additions and 3 deletions
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19
armsrc/iso14443a.c
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@ -1894,10 +1894,23 @@ int iso14_apdu(uint8_t *cmd, uint16_t cmd_len, void *data) {
if (!len) {
return 0; //DATA LINK ERROR
// if we received an I- or R(ACK)-Block with a block number equal to the
// current block number, toggle the current block number
} else{
// S-Block WTX
while((data_bytes[0] & 0xF2) == 0xF2) {
// Transmit WTX back
// byte1 - WTXM [1..59]. command FWT=FWT*WTXM
data_bytes[1] = data_bytes[1] & 0x3f; // 2 high bits mandatory set to 0b
// now need to fix CRC.
AppendCrc14443a(data_bytes, len - 2);
// transmit S-Block
ReaderTransmit(data_bytes, len, NULL);
// retrieve the result again
len = ReaderReceive(data, parity);
data_bytes = data;
}
// if we received an I- or R(ACK)-Block with a block number equal to the
// current block number, toggle the current block number
if (len >= 3 // PCB+CRC = 3 bytes
&& ((data_bytes[0] & 0xC0) == 0 // I-Block
|| (data_bytes[0] & 0xD0) == 0x80) // R-Block with ACK bit set to 0