zink's Blog

Anything stupid
Posts tagged as opensource

CityEL Digital Speedometer

2016-11-25 by zink, tagged as arm, cityel, electric vehicle, opensource

Here I will show you a little part of the CityEL project. It is a digital speedometer, which gets it's data over CAN bus from the battery management system.

The speedometer is based on a BananaPro embedded ARM board which is based on a pretty powerful Allwinner A20. Currently the graphics are rendered by software rendering, but it is planned to use the OpenGL ES capable graphics unit to render it. This should speed up the rendering from 10fps to about 30-40fps.

In the background there is a thread which stores all measured values to a database to use the data for a scientific cell model. Maybe I will use this model to calculate the SoC (State of Charge) and SoH (State of Health) of the cells in the future.


2014-09-06 by zink, tagged as arm, linux, opensource

Working on the OpenSubnotebook. Currently creating the interface for the display.

OpenHardware Laptop

2014-07-05 by zink, tagged as arm, linux, opensource

I've overthrown the selected EOMA68 cpu module for my laptop and I am currently designing something completely own/new.
The new system will be completely modular, which means that any part of the hardware (except for the body) will be exchangeable. I will plan the whole system and put anything under some Creative Commons license.

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Working on an open source USB stack

2013-09-05 by zink, tagged as opensource, pic18f, usb


I have just started working on an open source USB stack for PIC18F devices from Microchip. I will work with the XC8 compiler as the old C18 is being phased out.
The features to implement will be HID and CDC. I'm not sure if I will implement anything else, as these are the needed parts for most hobbyists.