uint8_t ccRxPacket(uint8_t *data) {
uint8_t count= 0; // length byte
uint8_t status; // RX status
uint8_t nrcvd= 0; // bytes received
uint8_t n;
while(1) {
status= ccGetRxStatus();
switch(status & CC1100_STATUS_STATE_BM) {
case CC1100_STATE_IDLE:
case CC1100_STATE_RX:
// If there's anything in the RX FIFO....
if((n= (status & CC1100_STATUS_FIFO_BYTES_AVAILABLE_BM))) {
if(!count) {
// Make sure that the RX FIFO is not emptied
// (see the CC1100 or 2500 Errata Note)
if(n>1) {
count= ccReadReg(CC1100_RXFIFO);
n--;
} else {
break;
}
}
// Make sure that the RX FIFO is not emptied
// (see the CC1100 or 2500 Errata Note)
if((n>1) && (n!= count-nrcvd)) {
// Leave one byte in FIFO
n--;
} else if((n<=1) && (n!= count-nrcvd)) {
// Need more data in FIFO before reading additional bytes
break;
}
// Read from RX FIFO and store the data in rxBuffer
ccReadFifo(&(data[nrcvd]), n);
nrcvd+= n;
// Done?
if(!count && (nrcvd==count)) return count;
break;
} else if(!count) return 0; // nothing to receive
case CC1100_STATE_RX_OVERFLOW:
ccSpiStrobe(CC1100_SFRX); // clear overflow
return 0;
}
}
}
uint16_t CC1200::registerConfig(void)
{
byte writeByte;
byte verifyVal;
uint16_t errors = 0;
// Reset radio
reset();
byte registerCount = (sizeof(settings) / sizeof(registerSettings));
// Write registers to radio
for (uint16_t i = 0; i < registerCount; i++)
{
writeByte = settings[i].data;
ccWriteReg(settings[i].addr, &writeByte, 1);
ccReadReg(settings[i].addr, &verifyVal, 1);
if (verifyVal != writeByte)
{
errors++;
if (Serial)
{
Serial.print("Error writing to address 0x");
Serial.print(settings[i].addr, HEX);
Serial.print(". Value set as 0x");
Serial.print(writeByte, HEX);
Serial.print(" but read as 0x");
Serial.println(verifyVal, HEX);
}
}
}
if (Serial)
{
Serial.print("Wrote ");
Serial.print(registerCount - errors);
Serial.print(" of ");
Serial.print(registerCount);
Serial.println(" register values.");
}
return errors;
}
boolean CC1200::transmit(byte *txBuffer, byte start, byte length)
{
if (asleep == true)
{
return false;
}
//check FIFO and radio state here
byte txBytesUsed = 0;
// Read number of bytes in TX FIFO
ccReadReg(REG_NUM_TXBYTES, &txBytesUsed, 1);
if (txBytesUsed > 0)
{
// Make sure that the radio is in IDLE state before flushing the FIFO
setState(CC1200_IDLE);
SendStrobe(SFTX); //flush buffer if needed
}
setState(CC1200_FSTX); //spin up frequency synthesizer
byte data[length];
for (int i = 0; i < length; i++)
{
data[i] = txBuffer[i + start]; //TODO: alter fifo access functions to allow passing txBuffer directly to read or write from a specific chunk of it
}
ccWriteTxFifo(data, length); //TODO: do error checking for underflow, CCA, etc.
#ifdef DEBUG1
Serial.print("Writing ");
Serial.print(length);
Serial.println(" bytes: ");
printBuffer(txBuffer, length);
#endif
setState(CC1200_TX); //spin up frequency synthesizer
return true;
}