radio-notes.md

RFM69_initialise

• Set MY_RFM69_POWER_PIN mode to OUTPUT, if defined.

• Power up the radio RFM69_powerUp().

• Reset radio module, if MY_RFM69_RST_PIN is defined.

• Configure radio:

  • Set radio address to RFM69_BROADCAST_ADDRESS.
  • Set radio dataReceived to false.
  • Set radio ackReceived to false.
  • Set radio txSequenceNumber to 0.
  • Set radio radioMode to RFM69_RADIO_MODE_SLEEP.
  • Disable ATC by setting ATCenabled to false.
  • Set radio ATCtargetRSSI to RFM69_RSSItoInternal(MY_RFM69_ATC_TARGET_RSSI_DBM).

• Init SPI:

  • Set MY_RFM69_CS_PIN to HIGH.
  • Set MY_RFM69_CS_PIN to OUTPUT (why that order?).

• Call SPI.begin()

• Set radio mode RFM69_setRadioMode(RFM69_RADIO_MODE_STDBY).

• Set radio configuration RFM69_setConfiguration()

  Register	Value	Comments
  RFM69_REG_OPMODE	RFM69_OPMODE_SEQUENCER_ON	RFM69_OPMODE_LISTEN_OFF
  RFM69_REG_DATAMODUL	RFM69_CONFIG_FSK
  RFM69_REG_BITRATEMSB	RFM69_BITRATEMSB_55555
  RFM69_REG_BITRATELSB	RFM69_BITRATELSB_55555
  RFM69_REG_FDEVMSB	RFM69_FDEVMSB_50000
  RFM69_REG_FDEVLSB	RFM69_FDEVLSB_50000
  RFM69_REG_LNA	RFM69_LNA_ZIN_200	RFM69_LNA_CURRENTGAIN
  RFM69_REG_RXBW	RFM69_RXBW_111_16_2
  RFM69_REG_AFCBW	RFM69_RXBW_111_16_2
  RFM69_REG_DIOMAPPING2	RFM69_DIOMAPPING2_CLKOUT_OFF
  RFM69_REG_IRQFLAGS2	RFM69_IRQFLAGS2_FIFOOVERRUN	clear FIFO and flags
  RFM69_REG_RSSITHRESH	RFM69_RSSITHRESH_VALUE
  RFM69_REG_PREAMBLEMSB	RFM69_PREAMBLESIZE_MSB_VALUE
  RFM69_REG_PREAMBLELSB	RFM69_PREAMBLESIZE_LSB_VALUE
  RFM69_REG_SYNCCONFIG	RFM69_SYNC_ON	RFM69_SYNC_FIFOFILL_AUTO
  RFM69_REG_SYNCVALUE1	RFM69_SYNCVALUE1
  RFM69_REG_SYNCVALUE2	MY_RFM69_NETWORKID
  RFM69_REG_PACKETCONFIG1	RFM69_CONFIG_WHITE
  RFM69_REG_PAYLOADLENGTH	RFM69_MAX_PACKET_LEN	in variable length mode: the max frame size, not used in TX
  RFM69_REG_NODEADRS	RFM69_BROADCAST_ADDRESS
  RFM69_REG_BROADCASTADRS	RFM69_BROADCAST_ADDRESS
  RFM69_REG_FIFOTHRESH	RFM69_FIFOTHRESH_TXSTART_FIFOTHRESH	(RFM69_HEADER_LEN - 1)
  RFM69_REG_PACKETCONFIG2	RFM69_PACKET2_RXRESTARTDELAY_2BITS	RFM69_PACKET2_AUTORXRESTART_OFF
  RFM69_REG_TESTDAGC	RFM69_DAGC_IMPROVED_LOWBETA0	continuous DAGC mode, use 0x30 if afc offset == 0

• Set radio frequency to the first argument frequencyHz value of RFM69_initialise.

• Set radio power level to RFM69_setTxPowerLevel(MY_RFM69_TX_POWER_DBM).

• Read all radio registers.

• Call RFM69_sanityCheck() and return false if failed.

  • Ensure that register RFM69_REG_RSSITHRESH is equal to RFM69_RSSITHRESH_VALUE.
  • Ensure that register RFM69_REG_SYNCVALUE1 is equal to RFM69_SYNCVALUE1.
  • Ensure that register RFM69_REG_SYNCVALUE2 is equal to MY_RFM69_NETWORKID.

• Set RFM69_irq to false.

• Set MY_RFM69_IRQ_PIN mode to INPUT.

• Return true.