Funk OS Port for Coldfire on SourceForge

I just uploaded my port of FunkOS for Coldfire microcontroller devices. The code is an Eclipse project with PE, that runs an example I created to test it. The port is not cleaned by commented code, as my time is limited. This is the reason I did not post it earlier. I thought that I need to clean it up from unused content. So time passed and I decided to get along and post it as is.

It uses a modified version of FunkOS R3. The modifications included code fixes that my MISRA checks were complaining on the original FunkOS code, mostly on external packages (like graphics).

The test code included three tasks (Idle, LedAlive, Test), that were going to sleep for a while, did something (LED toggle) and then waited to synchronize by a semaphore with an other task. That created a nice LED blinking with two LEDs.

You may find the project at COFILOS page here.

My post on FUNKOS PORT TO COLDFIRE V2 was based on this code.

I hope someone finds it useful.



Completed CLI for COFILOS

During the last weeks I finished a long task that I had…

My COFILOS CLI is ready and tested with TDD in my host.
Still I have to test it on my target.

To be honest the main skeleton is ready. Currently only internal commands (ie. compiled) are available. In the future after the addition of the FAT-FS on my SD card I plan to support commands that exists on my SD. This is much more work and is not needed at the moment.

Of course it has some neat things for an embedded system, like line editing and command history.

It took me about a week’s time to implemented it (still the majority of my efford was the design of a scaleable architecture and modularity). However this week time seemd to me too long (1-2 months..), as I work on it when I have time.

I computed myself the memory footprint and it takes about 500-600 bytes of RAM. It seems a lot but this reminded me that strings DO take space. Lots of space in terms of small embedded systems. Fortunetely my Coldfire has 64KB of RAM so this would no be a problem; Even with 32KB I believe it should be fine.

It is very modular. Actually the CLI is a handler not doing any real I/O to UART or Network. It just handles strings, characters and VT100 commands. A thin top layer is used to transfer between the external world and the handler all the required data. In case of COFILOS this is the CLI Service task.

Next step is to implement the drivers for SPI and TWI (I2C), before going forward with FAT-FS….

By then I would complete the RAM Rd/WR, Flash Rd/Wr/Erase, SPI and TWI access functions for the CLI.