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USB ColdFire Multilink debugger
Joseph S. Mar 25, 2015 at 11:34 AM (11:34 hours)
Staff: Takao Y.

  • Hi,

    Hope you can help.

    Does the debugger for the USB ColdFire Multilink debugging pod and application use IRQ7 for communications with the target board?

    If so, does this preclude the use of IRQ7 as a GPIO for our application? That is, is IRQ7 dedicated to the debugger or can it possibly be relocated. Judging from the Debugger Settings configuration in the CodeWarrior IDE, it doesn't look like. We can relocate our GPIO use of the associated port of IRQ7 (Port NQ, bit D7) to another port but not without a whole lot of rerouting on our board and Port NQ D7 is the preferred use of GPIO for us.

    Please confirm.

    Joe Stepien
    FSR, Inc




    Comments

  • Greetings,

    For debugging with any P&E hardware interface that supports ColdFire, here is the signals and pins we need and expect:

    a. BKPT, DSI, and DSCLK are drive low by the P&E interface
    b. RESET is driven low by interface for 20ms and then released
    c. PST0-3 lines driven high by processor.
    d. Activity seen on DSI, DSO, DSCLK means successfully in debug.

    So as long as IRQ7 is not sharing a pin assignment with any of the signals I mentioned above, then you should be fine.


    Takao Yamada

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