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TDA4VM: How to catch WFI/WFE mode?

Baichuan
Prodigy 190 points
Part Number: TDA4VM

Hi,

  Our company wants to develop programs on the TDA4 board, and the development environment is QNX+RTOS.

  We want to judge whether arm enters WFI or WFE mode in the program. 

  Is there any way to judge whether arm enters WFI or WFE mode?

  Thank you!

  • +1
    TI__Guru** 120301 points

    Hi,

    I'm sure there are multiple ways to do it.   

    One possibility is hooking up the CCS debugger using the built-in XDS110 on the EVM, and connecting to the 2nd A72 core. 

    On a system that has low usage the 2nd A72 is likely to be idle. 

    In this case when viewing the program counter in the dis-assembly view, the WFI can be seen.

    Regards,

    kb