Martin Zeller

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5 years, 1 month ago.

CAN at PIN PA11,PA12

Hello,

i bought a STM32F446ZEJ6 Chip and designd a own Board with this Controller. Everything works fine, i can upload code and use pins for blinky etc. But if i use the Pins PA11,PA12 for a CAN-Bus communication, nothing happens.

I write the code in the mbed online editor and compile the code with NUCLEO-F446ZE. If i compile the code with NUCLEO-F446RE and load it on the STM32F446ZEJ6 , the CAN-Bus communication works.

Maybe the compiler blocks the function on PA11,PA12 because they are used for USB_DM and USB_DP on the NUCLEO-F446ZE developementboard? Is there any solution to run the code on the mentioned pins with the compiler for the NUCLEO-F446ZE plattform?

Nice greetings

Question relating to:

Last updated: 20 Apr 2021
STM32 Nucleo-144 development board with STM32F446ZE MCU, supports Arduino, ST Zio and morpho connectivity

1 Answer

Zoltan Hudak
5 years, 1 month ago.

Hello Martin,

I don't have a NUCLEO-F446ZE board to test it but you can try to remove the USB driver by adding a mbed_app.json configuration file to the project:

mbed_app.json

{
    "target_overrides": {
        "*": {
            "device_has_remove": ["USBDEVICE"]
        }
    }
}