CAN on STM32F103 RB - Nucleo 64

[Nicolas Cmb]

Posted on May 17, 2017 at 12:00

Hi Community,

I'm a CAN protocol beginner and I'm quite lost about it. Let’s start from the beginning; I’m working on a CAN bus protocol with two STM32F103 RB – Nucleo 64 microcontrollers and two transceivers MCP2551. The objective is to send a message from a microcontroller to the other one (and eventually show on is UART).

I’ve done a little scheme of my installation but I’ve got problems with my program.

I’m quite lost about what I have to do, especially to begin a simple CAN transmission.

When I'm pressing the button the led, which should be flashing, is freeze, so obviously he's waiting for something but what ?How can I just send a message to the other microcontroller ?

And finally, I heard about CAN’s mask and I don't know how they are uses, and for what. I have enclosed a part of my code.

Thank you for your help,

- Nicolas -

[Tesla DeLorean]

Posted on May 17, 2017 at 13:55

Aren't there HAL examples for CAN under the CubeMX F1 Install?

On the receive end you configure a filter which allows you to cherry-pick messages on the bus. The filter is configured with a bitwise AND, followed by a comparison.

You understand binary representation, and the AND operation, right? When you AND something with a bit vector, that acts as a MASK letting though only the bits you have SET in the mask.

[Nicolas Cmb]

Posted on May 17, 2017 at 15:56

Hi

Turvey.Clive.002

‌,

thank you for your help

[Imen.D]

Posted on May 17, 2017 at 15:14

Hi

Cmb.Nicolas

,

You can inspire from this CAN example shows how to configure the CAN:

STM32Cube_FW_F1_V1.4.0\Projects\STM3210E_EVAL\Examples\CAN\CAN_Networking

Hope this bring you some help.

Imen

[Nicolas Cmb]

Posted on May 17, 2017 at 15:57

Thank you

DAHMEN.IMEN

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