Figured it out! I'm stupid...

Apparently if you do not manually set .bus_off_indicator to disabled (-1), it defaults to enabled , and defaults to GPIO0.

Once I set the bus_off_indicator output to -1, everything worked perfectly.

/* Node 1 config */
twai_onchip_node_config_t cfg1 = {
.io_cfg ...

Is there something special about GPIO-0 on the ESP32-C6? Specifically the ESP32-C6-MINI-1-N4. Using ESP-IDF v5.5.1.

It does not mention anything in the datasheet, it is not a strapping pin.

I am building a device with 3 CAN busses. I know that the ESP32-C6 only has two TWAI controllers, so im ...

Im not sure what you're asking...

Classical CAN only allows 8 bytes max payload per message.

For messages with >8 bytes payload, you need to use CAN-FD (which is not supported by the ESP32's internal CAN controller).

Regarding the filtering, you dont have to use the hardware filters...you can ...

Hey can anyone help me interfacing esp32 with mcp2515 with tja1050 transceiver module.


If you are only working with one CAN bus, you dont need an MCP2515. The ESP32 already has one CAN controller built in.

All you need is the TJA1050 wired directly to the ESP32. Search "TWAI" in the ESP IDF ...

Finally had a chance to mess around with this...in case anyone else is curious...

code is sloppy and could be condensed...and of course be sure add your own stuff to check return/error codes.

Also this code assumes your SPIFFS partition size is a multiple of 1024 obviously, otherwise you can add ...

Yes that api uses memory mapped reads which are always tied to flash encryption, so it would have to be reworked to use raw flash reads for unencrypted partitions.

Is there any documentation or sample code on using the SHA hardware engine for raw hardware reads?

My suspicion was confirmed as correct.

I read out the [unencrypted] SPIFFS from the encrypted unit, then I manually encrypted that SPIFFS bin using espsecure.py with the same key I used to encrypt the app-flash, then flashed that encrypted SPIFFS bin back into the ESP32.

Then I asked the ESP32 to ...

There appears to be a problem with esp_partition_get_sha256 when requesting the sha256 hash of a SPIFFS partition on an ESP32 that has flash encryption enabled.

Yes, I know that even with flash encryption enabled, SPIFFS encryption is not supported.

That is fine, however I believe the problem is ...

Im using the RMT peripheral to bitbang a mult-master single-wire databus that uses CSMA/NDA to control arbitration and prevent collisions if two nodes attempt to Tx simultaneously.

I have it working for Tx/Rx, but Im having trouble with how to setup bus idle verification.

The End-Of-Frame marker ...

Is the ESP32-S3 "mini" module datasheet available yet?