[ECOS] Cortex/STM32 Port

[Paul J THACKER]

Hi Simon,

Thanks for the response.

Simon Kallweit wrote:
> 
>> I saw in the archives that an ECOS port for the STM32 is underway. Our 
>> group at STMicroelectronics is just about to undertake the same thing.
>>
>> If this port is still active, please contact me on this list or 
>> privately by email.
> 
> Yeah, the port is still active. I just got distracted for other projects 
> recently, so work has been rather slow. Anyway, it would definitely make 
> sense to concentrate on a common port, instead of everybody starting 
> their own :) 

Agreed!

I have already done the following:
> 
> * added new "cortexm" architecture, descended from the arm architecture, 
> adapted startup and initialization code
> * added "stm32" variant, with stm3210e as the first platform
> * implemented diagnostics (uart), realtime clock (systick), interrupt 
> api (nvic + ext), gpio api etc.
> * implemented uart and flash drivers

Sounds like you've made a lot of progress. Kishore (Parlerlamudi, on 
copy) will be doing the bulk of the work on our end. I'll help out when 
time permits. Our goal is to create a WiFi platform base on the 
STM3210E-EVAL board. The first step (beyond the basic port) is to write 
a driver for an ethernet daughtercard to verify the BSD-based TCP/IP 
stack in ECOS.

> 
> What is still missing is proper interrupt handling and context 
> switching, as I still not quite got my head around it. So, help would be 
> really welcome. Also, there is lots of lack in the GDB stub area, as 
> well as several other "basic" features, such as running code from ram 
> entierly, etc. I also ran into a few issues with the toolchain lately, 
> as it seems to link incorrectly sometimes, but I didn't have the time 
> yet to investigate more.
> 
> Anyway, most of the basics are in place and usable. You can access the 
> current repository at
> 
> https://svn.inthemill.ch/ecos-cortex/trunk
> 
> Please feel free and checkout the sources, and give me some feedback. 
> Oyvind Harboe from Zylin has suggested that we move the repository to 
> ecosforge. This might be a good idea, if more people are interested in 
> working on this. I could also give single users write privileges, thats 
> not a problem. 

Thanks, we'll do a checkout and take a look.

Also please note that anyone working on the code should
> get an FSF copyright assignment as soon as possible. This is absolutely 
> necessary to get the port into the official eCos repository, which has 
> to be of high priority in my opinion. I for myself already got an 
> assignment.

I'll look into this.

> 
> I should be available for eCos development again in about 1-2 days.
> 
> Best regards
> Simon
> 
> 

Best Regards,
Paul

-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss