assert failed: twai_handle_tx_buffer_frame twai.c:183 (p_twai_obj->tx_msg_count >= 0) if CONFIG_TWAI_ERRATA_FIX_TX_INTR_LOST=y (IDFGH-8204)

[EmbeddedDevver]

The TWAI interface has a bug that causes the chip to reboot if you short / have interference the CANBUS pins. There is a proposed solution in the IDF github.

For that I need to adjust the IDF TWAI component:

# TWAI configuration
#
CONFIG_TWAI_ERRATA_FIX_TX_INTR_LOST=y

Does anyone know how I could implement it in the Arduino/Platformio enviroment?

[Jason2866]

No you have to configure

# CONFIG_TWAI_ERRATA_FIX_TX_INTR_LOST is not set

to avoid crashing until the bug is fixed in IDF. In the meantime

• use Arduino core 2.0.4 (this change was made after release of core 2.0.4)
• or compile you Arduino libs yourself. See https://github.com/espressif/esp32-arduino-lib-builder
• use IDF with Arduino as Component

[EmbeddedDevver]

Thanks Jason for your reply.

How can I compile the TWAI for platformIO myself, I want to fix it for (platform = espressif32 @ ^4.4.0) ? Do you know where I can start with that?
Thank you!

I use platformIO

No bug is with version 3.5

platform = espressif32 @ ^3.5.0

Then there is no problem.

starting version 4.x then the bug starts eg

platform = espressif32 @ ^4.4.0

[Jason2866]

Than it is not the setting mentioned. This was changed lately. https://espressif-docs.readthedocs-hosted.com/projects/arduino-esp32/en/latest/esp-idf_component.html

[EmbeddedDevver]

Please note
espressif32 3v5 does not use TWAI but CAN.
espressif32 4.4 uses TWAI (with the bug)

[Jason2866]

Not a platformio issue anyways. You can start here https://community.platformio.org/t/framework-espidf-arduino/14949
There is already a open issue in IDF, search the error or wait until it is fixed or use the old working core.

[f-hoepfinger-hr-agrartechnik]

espressif/esp-idf#9697