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Mcasp can't work after syslink.ko loading

golden tiger
Intellectual 625 points

Dear all:

    The CPU is CA8168, including C674x DSP + ARM Cortex-A8.

   (1) I  utilize  mcasp  to transfer data  in ARM. But when I load the syslink.ko to implement other functions in DSP, the mcasp can't  work and no data transfer.

   (2) Then I change the order between mcasp and syslink.ko. The syslink.ko load first, then mcasp is used. But  after engine_open() is called, the mcasp also can't work.

   I don't know why the syslink.ko  can affect the mcasp. The mcasp run in ARM, the  syslink.ko and engine_open() is used to init DSP.

   The mcasp transfer data by EDMA.

 

 

Thanks

  • 0
    TI__Mastermind 20805 points

    Can you connect to the DSP with CCS?   It would be interesting to use the ROV tool and look at the Hwi module and see what interrupts are being used.   I wonder if there's a conflict between the interrupt used for SYS LINK communications and the MCASP and/or EDMA?