UART 2 controlled by the M4 core but no prints

Hi
I am trying to use M4 for development. And as the title, UART2 is controlled by the M4 core, and when the board is running, I connect a serial to UART2, but I can not see any prints.
So MQX RTOS is already running on M4?
And if MQX is already running on M4, where is the MQX image? Is it on the SD card?
Thanks!

 

Dear tonyuan,
we cannot release the MQX image because is protected by copyright (not our copyright, FYI). It's on M4.
How have you connected to UART2?
Following the guide, you have to use very specific pins. Have you followed the guide about this?

 

Hi Andrea

Thanks for replying.
I can run MQX on M4 now. I have got the code of MQX and compile a image myself.
And at least, the example runs ok, and UART2 have prints.

 

Then everything's fine, I'll close the topic.