/**
* receiveData
*
* Read data packet from RX FIFO
*
* 'packet' Container for the packet received
*
* Return:
* Amount of bytes received
*/
byte CC1101::receiveData(CCPACKET * packet)
{
byte val;
byte rxBytes = readStatusReg(CC1101_RXBYTES);
// Any byte waiting to be read and no overflow?
if (rxBytes & 0x7F && !(rxBytes & 0x80))
{
// Read data length
packet->length = readConfigReg(CC1101_RXFIFO);
// If packet is too long
if (packet->length > CC1101_DATA_LEN)
packet->length = 0; // Discard packet
else
{
// Read data packet
readBurstReg(packet->data, CC1101_RXFIFO, packet->length);
// Read RSSI
packet->rssi = readConfigReg(CC1101_RXFIFO);
// Read LQI and CRC_OK
val = readConfigReg(CC1101_RXFIFO);
packet->lqi = val & 0x7F;
packet->crc_ok = bitRead(val, 7);
}
}
else
packet->length = 0;
setIdleState(); // Enter IDLE state
flushRxFifo(); // Flush Rx FIFO
//cmdStrobe(CC1101_SCAL);
// Back to RX state
setRxState();
return packet->length;
}
/**
* receiveData
*
* Read data packet from RX FIFO
*
* Return:
* Amount fo bytes received
* 'packet' Container for the packet received
*/
byte CC1101::receiveData(CCPACKET * packet)
{
byte val;
// Any byte waiting to be read?
if (readStatusReg(CC1101_RXBYTES) & 0x7F)
{
// Read data length
packet->length = readConfigReg(CC1101_RXFIFO);
// If packewt is too long
if (packet->length > CC1101_DATA_LEN)
packet->length = 0; // Discard packet
else
{
// Read data packet
readBurstReg(packet->data, CC1101_RXFIFO, packet->length);
// Read RSSI
packet->rssi = readConfigReg(CC1101_RXFIFO);
// Read LQI and CRC_OK
val = readConfigReg(CC1101_RXFIFO);
packet->lqi = val & 0x7F;
packet->crc_ok = bitRead(val, 7);
}
}
else
packet->length = 0;
// Flush RX FIFO. Don't uncomment
//cmdStrobe(CC1101_SFRX);
// Enter back into RX state
setRxState();
return packet->length;
}
