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cpu/cc2538: Enable CRC checking of received packets (#5654)

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This commit is contained in:
Aaron Sowry 2016-07-26 04:34:44 +12:00 committed by hexluthor
parent cf3ee67780
commit 66b36397b6
1 changed files with 10 additions and 3 deletions
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13
cpu/cc2538/radio/cc2538_rf_netdev.c
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@ -300,14 +300,21 @@ static int _recv(netdev2_t *netdev, char *buf, int len, void *info)
/* GNRC wants to know how much data we've got for it */
pkt_len = rfcore_read_byte();
/* If the value of the first byte of the RX FIFO does not correspond
to the amount of data received, then drop the packet. */
if (pkt_len != RFCORE_XREG_RXFIFOCNT) {
/* Make sure pkt_len is sane */
if (pkt_len > CC2538_RF_MAX_DATA_LEN) {
RFCORE_SFR_RFST = ISFLUSHRX;
mutex_unlock(&dev->mutex);
return -EOVERFLOW;
}
/* CRC check */
if (!(rfcore_peek_rx_fifo(pkt_len) & 0x80)) {
/* CRC failed; discard packet */
RFCORE_SFR_RFST = ISFLUSHRX;
mutex_unlock(&dev->mutex);
return -ENODATA;
}
if (len > 0) {
/* GNRC wants us to drop the packet */
RFCORE_SFR_RFST = ISFLUSHRX;