Coding my own open source 24x ECU [beta available]

[AngelMarc]

I've probably flashed it well over 100 times iterating this code. Pretty sure all code goes on EEPROM, separate part on board, internal is bootloader. It still shows up as a flash drive if holding boot button when plugged in, but that's it.

[AngelMarc]

Betting a lot of the adaptation from mycropython to Arduino uses a bunch of the same interpitter nonsense. Probably why compiler was less picky than for the Teensy.

[AngelMarc]

Will probably make a revision soon. Initialize pattern history to be 10101010 or 01010101. As is, there's potential for a false match at initial start up in one area of the wheel. When I initially set pattern length to 8, I figured the extra would help and just be simpler. Might later change it to 6 teeth per pattern and initialize 101010 or 010101, for the same 90 degree sync potential GM originally went for.
A logic analyzer/oscilloscope that can record would help show it with pictures and what not, but whatever. Thinking through what the ECU reads on startup... I know it needs done.

[AngelMarc]

Should reset pattern history to initialized values on low RPM cut too. That matters.

[AngelMarc]

I went ahead and made both those changes in 1st post, with 0 testing first.

[AngelMarc]

Considering direction of rotation and the specific pattern used, might not have mattered. Makes sense, designed to work with a very basic ASIC. Need to remember it's short teeth that decode as a 1. The more I mess with this wheel setup, the more I like it. The mechanical logic to it is great.

[AngelMarc]

It's reverted. I need to come up with a repeatable test and test both options. I'll blame it on lack of sleep, not that my reason matters for the end result. Shouldn't have pushed an untested update.

[AngelMarc]

Some sanity checking.
https://chatgpt.com/share/68652bb2-e238 ... 5993269e90
EDIT: I didn't tell it the answer was 5, or 6 including 1st corrupt bit as Delco CIC datasheet says.

[MPC001]

Some sanity checking.
https://chatgpt.com/share/68652bb2-e238 ... 5993269e90

How reliable, accurate, helpful is the AI support?

[AngelMarc]

lol I added a picture.
I also typed the pattern and looked for partially initialized values that could line up in 2 spots. After failing to notice any, I tried AI; sometimes it blows your mind like it understands perfectly the 1st time and points out some shit you'd never think of, other times you'd swear it has dimentia.When I originally thought there could be a problem, I forgot short teeth equal 1.