i2c sometimes change bytes when uart interrupts occures (IDFGH-3451)

[moggiozzi]

Environment

• Development Kit: Custom board
• Module or chip used: ESP32-WROOM-32
• IDF version (run git describe --tags to find it): v4.1-beta1-266-g56c1646e2
• Build System: idf.py
• Compiler version (run xtensa-esp32-elf-gcc --version to find it): xtensa-esp32-elf-gcc (crosstool-NG esp-2019r2) 8.2.0
• Operating System: Windows
• (Windows only) environment type: ESP Command Prompt
• Using an IDE?: No
• Power Supply: USB

Problem Description

In my board mlx90640 connected to ESP32 i2c.
When communicate over uart and i2c at the same time I read incorrect bytes from i2c.

Expected Behavior

Read correct bytes from i2c.

Steps to reproduce

Run project from https://github.com/moggiozzi/mlxtest
Related issue melexis/mlx90640-library#68

[Alvin1Zhang]

Thanks for reporting. We have a fix internally under review, will share updates once the fix is available on GitHub.

[pchevali]

Hi,
Does this issue has been solved ? I am noticing the same behaviour, with my board

[AxelLin]

Thanks for reporting. We have a fix internally under review, will share updates once the fix is available on GitHub.

@Alvin1Zhang
Could you share which commit fixes this issue?

[AxelLin]

Thanks for reporting. We have a fix internally under review, will share updates once the fix is available on GitHub.

@Alvin1Zhang Could you share which commit fixes this issue?

@Alvin1Zhang Could you share the commit fix? Or at least update the status?

[ginkgm]

Hi @moggiozzi ,

We don't have a MLX90640 , is there a simpler example to reproduce the issue?

Do you have external pull-ups on the I2C pins of your board? what's the value?

Is it possible for you to reproduce the issue at a fixed place? when the issue happens, what's on the I2C bus, what's the expected data and what's read instead?

Hi @pompompom ,

I have the same questions for you as above. And what's your HW and IDF version please?

Michael