Quick update for anyone curious: the Taycan appears to use the MC33772B, not the MC33772C. This uses the old TPL technology from NXP, not the TPL2 or TPL3 that the MC33665 chip supports. Back to the drawing board with an MC33664 transceiver instead of the MC33665.

I've been using trying to get communication to Taycan modules using two different NXP based eval boards. The latest is the KIT-PC2TPLEVB with the NXP ScriptGUI software. I've tried both TPL ports on 5 different batteries and cannot get any communication using the example_TPL2_772C script.

I'd be ...

As another aside, I saw the schematic image shows a TIC10024. That IC is for digital switches only and doesn't have ADC support. Did you mean to use a TIC12400 instead? That one does have an ADC for analog inputs.

Good catch on the second SPI interface being exposed via I2S. It's so bizarre they didn't use their own secondary SPI interface port on the Micromod connector.

I'll give that code a shot, thanks!

Thanks for your inputs on this and other forums, I released HeadlessZombie to production today.

Fingers crossed!

Now, firmware...

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This is so cool - congrats! You built out something I wanted to do myself - down to the Micromod platform. One challenge I found was the odd omissions ...

I have designed a PCB to interface with the NXP MC33771 BMS IC's using TPL. Though the full Datasheet is NDA'd there is a light version that has "most" of the functions to monitor and balance.

But I suck at programming. NXP do provide a SDK and evaluation kit with software. Using my PCB I was ...