"Hi, I'm working on an EV project. We're attempting to implement the CAN bus protocol on STM32. I'm wondering if there's a way to communicate between two STM32s using the CAN bus without using a module?"
Hi,
what is the "module" here ?
If you mean a driver chip : yes, you need one on every cpu-> CAN bus; transforms rx/tx from cpu to CANH/CANL symmetrical/complement signal line..
Something like this :
MCP2562 doing 3,3v cpu -> 5V standard CAN bus voltage level; and termination 120r on every end of line.
is about $ 1,50 on every cpu , and you work with real conditions, can connect to other CAN bus devices also.
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