Update about this project:
I modified my goal :
- 65% Neutrino board (to start with a prototype)
- USB/BLE hid device... use both
- Battery
- USB hub included
- OLED lcd
- Home made firmware
After searching a lot of information I decided to order:
- nrf51822 board (32bit ARM Cortex-M0 16Mhz with BLE with lots of GPIOs) for 16$ with dev. board on ebay. the same soc used in the adafruit without the Atmel chip which is not usefull and consume power
- Neutrino Plate from
http://ortholinearkeyboards.com/top-plates/neutrino-top-plate.. this is close to my final board..
- Mx Red switches (and some greetech switches to test)
- 0.96" OLED screen (SPI/I2C interface)
- cables, soldering iron etc..
- J-Link Programmer/Debugger for NRF51822
- EVE dsa keycaps
- usb charger, battery, usb hub...
I am still planning to handwire the switches (hope it will do it)
Next step for Firmware:
Use the mbed.org to write my framework to control the matrix, USB, BLE and LCD.
I will probably look at the code of existing firmware like tmk (which support the arm cortex)
I will update this thread if anyone is interested... please tell me.