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Microchip MRF24J40
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This directory contains a capture of the communication between a custom sensor
mote board [1] and a Microchip MRF24J40MA IEEE 802.15.4 transceiver module.

It is not nearly a complete sample of what types of traffic are possible,
it does not have any examples of cyclic mode, it doesn't even contain RX
packets, other than an ACK.

[1] The board used is available here:
https://github.com/karlp/karlnet/tree/master/nodes/boxcar


Logic analyzer setup
--------------------

The logic analyzer used was a generic Saleae Logic clone (at 16MHz).

The same configuration was used for all captures.

  Probe  Pin    Description
  -------------------------
  0      nRESET
  1      INT     Signals the host MCU
  2      SDI     Slave data IN
  3      SCK     SPI clock
  4      SDO     Slave data OUT
  5      nCS     SPI chip select
  6      VDD


mrf24j40-reset-wakeup.sr
------------------------

Capture of power-on behaviour resetting the radio and rewriting its config
as per the datasheet recommendations.

The sigrok command line used was:

  sigrok-cli -d fx2lafw --config samplerate=16M:captureratio=2 \
             --time 10ms -o mrf24j40-reset-wakeup.sr -t nCS=f \
             --channels 0=nRESET,1=INT,2=SDI,3=SCK,4=SDO,5=nCS,6=VDD


mrf24j40-wake-tx-ack.sr
-----------------------

Captures the host MCU waking the radio, sending a packet, and checking the
interrupt flags for an ACK. The sequence is not necessarily optimal, but
functional.

The sigrok command line used was:

  sigrok-cli -d fx2lafw --config samplerate=16M:captureratio=70 \
             --time 20ms -o mrf24j40-wake-tx-ack.sr -t INT=r \
             --channels 0=nRESET,1=INT,2=SDI,3=SCK,4=SDO,5=nCS,6=VDD