Simple GPIO tester works on Raspberry Pi (flashes LEDs on radio)

Built a simple C test harness to start testing the radio with

Baud rate for OOK increased to 4800bps to bring in line with latest Energenie builds. ...

Sync pattern now recognised correctly as 0x80,0x00,0x00,0x00
Switching is eratic, but learning always learns.

Added green LED around transmit and receive transactions. ...

This is useful for measuring total on-air time on logic analyser

Experiments on Arduino with larger register writes and FIFO write ...

Getting some corruption on the Arduino RAM buffers.
Logic analyser traces show that the tables are getting corrupted
and the wrong data is being written to the radio registers.

Managed to write/read the mode register from real RFM69 with Arduino

Reset, select, write working on Arduino

SPI being driven on Arduino

Got simple 5 pin interface with GPIO working on Arduino Pro Micro

Preparations for wiring up to Arduino

A 'go for broke' OOK transmitter added to hrf69_test

Implemented most of hrf69.c write and read functions

HRF_write_reg written

Factored out all stdio from all testers and code

Mock read and write test working for radio register

Proved that we can read a register back from simulation

First pass at writing a test in hrf69_test.c

Marked the interface queries in HRF69.h

First attempt at specing out implementation of HRF69 based on python

spi_test working on Mac

Refactored delay into a platform module

gpio_sim working on Mac

Wrote GPIO simulator in a mostly platform independent way.

Framework in place for Arduino GPIO and simulated GPIO

GPIO is now tagged as RPi specific in build process

Created file architecture for arduino build

Started refactoring

Moved all C into a drv folder.

First pass at defining hrf69.h and radio.h interfaces

Started to refactor code into C