Reprogramming the VFD Modular Clock
The open source firmware for the open the null can be downloaded fromgithub. It has recently undergone a series of improvements with lots of new exciting features (more about that in a later blog post).
Getting an ISP Programmer
To program the null, an ISP programmer is required. We do not sell one, so here are a few options:
Arduino ISP Programmer
Most Arduino boards can be used as an ISP programmer by using the ArduinoISP sketch. If you already own an Arduino board, this is probably the easiest way, but it requires some wiring.
AVR ISP mkii
This is Atmels own programmer. It is relatively affordable and can be purchased from Mouser, Digikey or similar shops.
This is Adafruit's low-cost programmer. It is quite a bit slower than the AVR ISP mkii, but works just as well as a programmer for the ATMega328P chip on the null.
Setting up the Compiler Toolchain
The VFD Modular Clock firmware is written for avr-gcc. The installation procedure differs depending on your OS.
Getting the Source Code
The latest source code ison github.
Click the ZIP button to download.
Setting up user.mk
The user.mk file is used by the makefile in the VFD Modular Clock firmware to read information about your programmer.
If you've set up an Arduino as an ISP programmer, use this:
This will compile the source code and flash it to the microcontroller. Once it is finished, the device will reboot and you will have the latest firmware!
The method described here also works for many of our other products, such as