// RFM-22 doc appears to be wrong: WUT for wtm = 10000, r, = 0, d = 0 is about 1 sec
void RH_RF22::setWutPeriod(uint16_t wtm, uint8_t wtr, uint8_t wtd)
{
uint8_t period[3];
period[0] = ((wtr & 0xf) << 2) | (wtd & 0x3);
period[1] = wtm >> 8;
period[2] = wtm & 0xff;
spiBurstWrite(RH_RF22_REG_14_WAKEUP_TIMER_PERIOD1, period, sizeof(period));
}
// Assumption: there is currently <= RF22_TXFFAEM_THRESHOLD bytes in the Tx FIFO
void RF22::sendNextFragment() {
if (_txBufSentIndex < _bufLen) {
// Some left to send?
uint8_t len = _bufLen - _txBufSentIndex;
// But dont send too much
if (len > (RF22_FIFO_SIZE - RF22_TXFFAEM_THRESHOLD - 1))
len = (RF22_FIFO_SIZE - RF22_TXFFAEM_THRESHOLD - 1);
spiBurstWrite(RF22_REG_7F_FIFO_ACCESS, _buf + _txBufSentIndex, len);
_txBufSentIndex += len;
}
}
bool RH_RF95::send(const uint8_t* data, uint8_t len)
{
if (len > RH_RF95_MAX_MESSAGE_LEN)
return false;
waitPacketSent(); // Make sure we dont interrupt an outgoing message
setModeIdle();
// Position at the beginning of the FIFO
spiWrite(RH_RF95_REG_0D_FIFO_ADDR_PTR, 0);
// The headers
spiWrite(RH_RF95_REG_00_FIFO, _txHeaderTo);
spiWrite(RH_RF95_REG_00_FIFO, _txHeaderFrom);
spiWrite(RH_RF95_REG_00_FIFO, _txHeaderId);
spiWrite(RH_RF95_REG_00_FIFO, _txHeaderFlags);
// The message data
spiBurstWrite(RH_RF95_REG_00_FIFO, data, len);
spiWrite(RH_RF95_REG_22_PAYLOAD_LENGTH, len + RH_RF95_HEADER_LEN);
setModeTx(); // Start the transmitter
// when Tx is done, interruptHandler will fire and radio mode will return to STANDBY
return true;
}
//------------------------------------------------------------------------
// Caution doesnt set sync word len in Header Control 2 0x33
void RF22_setSyncWords(const uint8_t* syncWords, uint8_t len)
{
spiBurstWrite(RF22_REG_36_SYNC_WORD3, syncWords, len);
}
void RF22::spiWrite(uint8_t reg, uint8_t val)
{
spiBurstWrite (reg, &val, 1);
}