WIP: Tvbgone fixes

Current patches required to use the IR LED for TV-B-GONE.

Still missing PWM support in python.

cf. #174 for TMR5.

assigned to @rahix

added 3-Module 6 - Needs Review labels

As mentioned in the issue (#174), we can't do the changes from 11c69b5b. But the other commit is something we can add already; the only issue I see is the following:

The light-sensor API (from epicardium/modules/light_sensor.c) can interact with the pin simultaneously to the GPIO code you added. We should add a locking mechanism between the two.

Yes I noticed this, in the app I disable it before for now.

I should probably put the app code here as well.

I tried to do it without PWM, but the best it can do with sleep_us() is around 16kHz when we need 36.

There is an IR LED?

Yes, it's at the top of the screen, it's used as a photo-diode by default to measure ambient light.

I should really finish this someday…

@mmu_man, I am slowly chipping away all the blockers for getting the timer peripheral free from its current use so we can get this working ... Still a lot left to do, unfortunately ...

added 311 commits

• 11c69b5b...b6832e3f - 309 commits from branch card10:master
• f41a61d1 - Expose the IR LED GPIO to python
• 5f0b229f - Use TMR3 instead of TMR5 for interrupts from epicardium

Compare with previous version

Just rebased.

added 2 commits

• 839fb434 - Expose the IR LED GPIO to python
• 52409cb3 - Use TMR3 instead of TMR5 for interrupts from epicardium

Compare with previous version

Looks good to me! Thanks for keeping our codebase clean.

However, I'm only a bot - so a human will still have to approve this request.

changed milestone to %v1.17

We discussed and maybe it is good enough to keep the timer as it is and simply deal with all the extra interrupts during IR transmission.

changed milestone to %v1.18

changed milestone to %v1.19

@mmu_man I'm trying to get IR remote capability somehow working in card10. Would you mind also sharing the actual Tvbgone code (even if it is not working at the moment due to TMR5)?

Sorry I skipped this… I uploaded my latest code there. You can probably cherry-pick the other commit here and leave the TMR5 one. IIRC it actually worked, just was too slow to send the correct modulations.