[riot-devel] Status of new I2C API

Hauke Petersen hauke.petersen at fu-berlin.de
Mon Feb 26 10:11:35 CET 2018


Hi again,

fixup to my previous mail: the new proposed API is better presented in 
#6576 [1]...

Cheers,
Hauke

[1] https://github.com/RIOT-OS/RIOT/pull/6576

On 02/26/2018 10:07 AM, Hauke Petersen wrote:
> Hi everyone,
>
> sorry for the late reply. The remodeling of the I2C (master) API 
> should indeed be tackled ASAP (as every newly merged implementation 
> just adds to the work)... But this is not new and I/we have been 
> talking about this for ages now...
>
> I won't be able to drive this nor to spend time on this. It would be 
> great, if anyone else could step up and take the lead. @Dylon: is this 
> maybe a job for you?!
>
> The current state:
> - tracking issue: #6577 [1]
> - new interface proposal: #4926 [2]
> - first thoughts on automated, HIL-style test setup: [3]  (see mostly 
> tests/softi2ccli/main.c)
>
> The former idea was, to rename the 'legacy' i2c functions (as proposed 
> in #6575 [4]), merge the new API and then rework all the 
> implementations and device drivers in a step-by-step manner. But with 
> more thoughts and recent experiences, the way to proceed is probably 
> using the feature-branch approach as recently done for for the new 
> ietif remodeling.
>
> So the steps that I see are:
> 1. finish the work on the testing setup [3], as in-depth testing is 
> the key for the remodeling (lessons learned from the SPI remodeling...)
> 2. implement the proposed interface [2] on some more (restricted) 
> target platforms (e.g. nrf52 TWIM) to verify, that the API details do 
> actually work on all the CPUs that we support...
> 3. rewrite existing periph drivers, adapt device drivers, and test 
> everything thoroughly. This will take significant time and effort!
>
> Best,
> Hauke
>
> [1] https://github.com/RIOT-OS/RIOT/issues/6577
> [2] https://github.com/RIOT-OS/RIOT/pull/4926
> [3] 
> https://github.com/RIOT-OS/RIOT/compare/master...haukepetersen:add_softi2cli
> [4] https://github.com/RIOT-OS/RIOT/pull/6575
>
>
>
> On 02/07/2018 01:15 PM, Dylan Laduranty wrote:
>> Dear RIOTers and maintainers,
>>
>> I would like to know the current status of the new I2C master API. 
>> It's been a long time since we heard about it. I'm willing to work on 
>> it and maybe others are also interested.
>>
>> I'm fully aware that such a big rework will take some times and a lot 
>> of efforts but this task has to be done.
>>
>> Would it be useful to create a task force ?
>>
>> What do you think ?
>>
>> Cheers
>>
>> -- 
>> Dylan Laduranty
>>
>>
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>> devel at riot-os.org
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>
>
>
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