Method sendFrame

RFM69.cpp:390–425

internal function

// internal function
void RFM69::sendFrame(uint16_t toAddress, const void* buffer, uint8_t bufferSize, bool requestACK, bool sendACK) {
  //NOTE: overridden in RFM69_ATC!
  setMode(RF69_MODE_STANDBY); // turn off receiver to prevent reception while filling fifo
  while ((readReg(REG_IRQFLAGS1) & RF_IRQFLAGS1_MODEREADY) == 0x00); // wait for ModeReady
  //writeReg(REG_DIOMAPPING1, RF_DIOMAPPING1_DIO0_00); // DIO0 is "Packet Sent"
  if (bufferSize > RF69_MAX_DATA_LEN) bufferSize = RF69_MAX_DATA_LEN;

  // control byte
  uint8_t CTLbyte = 0x00;
  if (sendACK)
    CTLbyte = RFM69_CTL_SENDACK;
  else if (requestACK)
    CTLbyte = RFM69_CTL_REQACK;

  if (toAddress > 0xFF) CTLbyte |= (toAddress & 0x300) >> 6; // assign last 2 bits of address if > 255
  if (_address > 0xFF) CTLbyte |= (_address & 0x300) >> 8;   // assign last 2 bits of address if > 255

  // write to FIFO
  select();
  _spi->transfer(REG_FIFO | 0x80);
  _spi->transfer(bufferSize + 3);
  _spi->transfer((uint8_t)toAddress);
  _spi->transfer((uint8_t)_address);
  _spi->transfer(CTLbyte);

  for (uint8_t i = 0; i < bufferSize; i++)
    _spi->transfer(((uint8_t*) buffer)[i]);
  unselect();

  // no need to wait for transmit mode to be ready since its handled by the radio
  setMode(RF69_MODE_TX);
  //uint32_t txStart = millis();
  //while (digitalRead(_interruptPin) == 0 && millis() - txStart < RF69_TX_LIMIT_MS); // wait for DIO0 to turn HIGH signalling transmission finish
  while ((readReg(REG_IRQFLAGS2) & RF_IRQFLAGS2_PACKETSENT) == 0x00); // wait for PacketSent
  setMode(RF69_MODE_STANDBY);
}

// internal function - interrupt gets called when a packet is received
void RFM69::interruptHandler() {