BUF_OFFSET
offset = BUF_OFFSET(txBuffer[pi][i][0]);
card->mem + BUF_OFFSET(rxBuffer[pi][rxp][0]),
BUF_OFFSET(rxBuffer[pi][rxp][0]), len);
BUF_OFFSET(txBuffer[pi]
BUF_OFFSET(txBuffer[pi]
+ BUF_OFFSET(txBuffer[i][0][0]);
+ BUF_OFFSET(txBuffer[i][NUM_TX_BUFFER - 1][LEN_RX_BUFFER - 1]);
offset = BUF_OFFSET(rxBuffer[pi][i][0]);