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DM6435 HPIC register not as described

Eric Bryan
Expert 1045 points

When I read the HPIC register (address 0x01C67830) with the debugger I am seeing 0x00000105.  SPRU998D July 2008 states this register should always have bit 3 set.  i.e. I should read a 0x0000010D.  Docs in error or is something broke?

 

Eric Bryan

 

  • 0
    TI__Mastermind 41665 points

    Eric Bryan said:
    When I read the HPIC register (address 0x01C67830) with the debugger I am seeing 0x00000105.  SPRU998D July 2008 states this register should always have bit 3 set.  i.e. I should read a 0x0000010D.  Docs in error or is something broke?

    I think this is a doc error, it looks like this should probably read back 0 to the host processor as you are seeing, in any case as it is a reserved value it can be ignored. Is there something going wrong in your HPI implementation that led you to suspect this bit?

  • 0 in reply to Bernie Thompson TI
    Expert 1045 points

    Was having trouble with the HPI and ran across this when testing my code.  The read from the HPI side seems ok--i.e. the bit3 is set.

  • 0 in reply to Eric Bryan
    TI__Mastermind 41665 points

    Eric Bryan said:
    The read from the HPI side seems ok--i.e. the bit3 is set.

    That makes sense and corresponds with what I would expect, thanks for the follow up, I filed this as an issue with the document so hopefully it should be fixed in a future revision.