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Query on DM6467 McASP port

Shaan
Intellectual 450 points

Hi,

                I have a query regarding Audio capture support on DM6467. If ACLKR0 ( Bit clock)  and AFSR0 ( Frame Sync ) are not present  ( pulled low ) and we start the McASP , should the complete DM6467 freeze ?  This problem we have seen in couple of products based on DM6467 processor and once it freezes you can’t do much but have to perform a power on reset. Please let us know if there is a solution to this problem.

 

Regards,

Shantanu Bhaduri

  • 0
    TI__Genius 14405 points

    I don't recall seeing such behavior. It might be something else. Are you doing this under Linux? what else is running?

    Are you able to create a standalone CCS testcase and try following the initialization guideline in the McASP user guide to isolate this issue?

  • 0 in reply to Paul.Yin
    Intellectual 450 points

    Yin,

                 We have seen this in audio test application which comes with LSP_01_30_00_082 .  We have seen this very consistently . In one of our boards , we use a FPGA to drive Bit clock and word clock to McASP. If we don't enable the clocks from FPGA and start the McASP , the system hangs . Is there some kind of while loop present in the code which can do this ?