LUA code and EGT makes ECU to hang

[zed65]

I'm having a weird problem with some LUA code and SPI EGT that makes the processor to hang.
Here is a guide to replicate my problem.

1. Flash the latest bundle to a F407 (black-board in my case).
2. Open console and write this into LUA:

Code: Select all

function onTick()
    adv = getOutput ("correctedIgnitionAdvance")
    print (adv)
end

3. Open Tunerstudio, create a new project.
4. Turn on EGT SPI, (tried with SPI1,2and3, same problem).

egtSpiHang.png (489.39 KiB) Viewed 1382 times

5. Reboot the processor.
6. It freezes in a couple of seconds (1-30sec).

The weird thing is that it seems to only affect the getOutput() command in LUA, everything else seems to work regarding LUA.

[AndreyB]

black-board in my case

Where does one get a black-board to test? is this reproducible on naked stm32f4discovery?

[zed65]

Search STM32F407VGT6 on Aliexpress

I think it will produce the same on a stm32f4discovery but i'm not 100%

[AndreyB]

Search STM32F407VGT6 on Aliexpress

I think it will produce the same on a stm32f4discovery but i'm not 100%

Oh so that's without actual EGT chip present?

Please link your complete tune just in case.

[zed65]

Yes, that's without the chip installed.
Let me get my actual ECU from my car (chip is present) and I check on that one.

[zed65]

Sadly it don't work on that either.
I tried both with and without an actual K-type sensor connected.

[mck1117]

andrey you should go look at the call to getMax31855EgtValue in status_loop.cpp and see if the things done in getMax31855EgtValue are a good idea to call from an arbitrary lua call stack

[AndreyB]

andrey you should go look at the call to getMax31855EgtValue in status_loop.cpp and see if the things done in getMax31855EgtValue are a good idea to call from an arbitrary lua call stack

Thank you! I've changed things https://github.com/rusefi/rusefi/commit/324378f252b049a5f83f0f42a9f44e54741ee349