STM32 CAN

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Introduction

Most STM32 MCUs are equipped with one or more CAN peripherals.

Loopback Example

The CAN peripheral on STM32 MCU's can be configured to run in loopback mode. This makes it possible to test CAN programming without actually hooking the device up to a physical CAN bus.

The source for this example is here: https://github.com/STM32World/firmware/tree/master/mcustm32f405_can_loopback

CubeMX Config

The clock is configured to maximum speed using the external crystal:

Can loopback example clock.png

Notice the APB1 bus is running at 42 MHz. The CAN peripherals are connected to this bus.

Can loopback example pinout.png

We can now configure the CAN1 periopheral:

Can loopback example can1.png Can loopback example can nvic.png

Real CAN bus example

To be added

Miscellaneous Links

To be added

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