leaving CAN intialization mode fails (MSR->INAK not reset)

[Sebastian Ulrich]

Posted on April 25, 2017 at 08:56The original post was too long to process during our migration. Please click on the attachment to read the original post.

[Imen.D]

Posted on April 25, 2017 at 12:12

Hi

ulrich.sebastian

,

We need more details onyour

configuration ofCAN hardware, how you initialize the pins, clocks...

Have you enabled GPIO clock, ...?

About

format source code, y

ou should expand toolbar by clicking on [

...

] icon :

Click on ''More >> Syntax Highlighter'' :

Then, insert your code in the appropriatelanguage:

Thanks

Imen

[Sebastian Ulrich]

Posted on April 26, 2017 at 16:03

Hello Imen,

I added the code of the initialization routine.

There you can see, that the GPIO clock is enabled. See line 28 and following.

The function 'RCC_GetGPIOClock' simply checks the port, provided by the (proprietary, not the ST CAN_InitTypeDef) init-structure and then returns the matching identifier.

The same applies to the function 'RCC_GetPinSource'.

I hope this helps understanding the code or the problem.

If I have to mark the action as 'done' please tell me how to do this.

The mechanisms of this community are somewhat confusing to me.

Sebastian.

[Sebastian Ulrich · Accepted solution]

Posted on September 27, 2017 at 05:01

Finally we got the solution.

The problem was, the wrong configuration of the alternate function.

GPIO_AF_CAN2

// has to be replaced with GPIO_AF_9

That's all.