OK i will use C7 for CP pull down signal if i dont use Outlander charger then.aot93 wrote: ↑Sat Mar 19, 2022 10:14 pmDo you mean the 3v3 take off on the teensy?I am working on your BMS module, adapting it for my use. I will use it with VW code.
Can you tell me why do you use 3V3 output pin C7 on your BMS board? Is it some sensor? I know CAN transciever is 5V tolerant.
I tried to keep the amount of 5v signals to a minimum to avoid possibility of damaging the teensy, the T3 is much better and is 5v tolerant the T4's die very quickly at 5v
Also the can transceivers have 3v3 printed on them so it's a little less confusing when fault finding
If you mean pin C7 on the plug, this is for connection to analogue current sensor and not used in this setup.
I just like to use signal inversion. Like with ULN2803 ladder. 12V signal goes in and signal to GND comes out. Internal (or external) pullup then helps with active pin sensing. I use this with my DUE and it is kind of like opto isolation. Cant damage DUE/Teensy pins with signal to GND .
One question though. Why dont we use remaining free pins on Teensy for PP sensing? Its just sensing pull up to GND. Is there any reason for ATtiny chip?
Or is it just full compatibility with the code?