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Configuration DM6437 GPIO via PCI

afshin afshar
Prodigy 20 points
Other Parts Discussed in Thread: CCSTUDIO

Hello everybody,

I have a problem configuring GPIO on EVMDM6437 via PCI.I Configure EVM board for PCI boot mode.

    SW2-1:  Off
    SW2-2:  Off
    SW2-3:  Off
    SW2-4:  On

    SW1-1:  On (Boot Mode = 0x1)
    SW1-2:  Off
    SW1-3:  Off
    SW1-4:  Off
    SW1-5:  On (FastBoot = 1)

I want to use GPIO[100] as output . I configure the GPIO register via PCI with PCI64_RegWrite32() API (in CCStudio_v3.3 folder)

but I always fail it

please help me.

Thanks for helping

  • 0
    TI__Genius 15310 points

    Hi,

    This is the feed back from developer.  Hope this help.

    This doesn’t really sound like a boot issue, rather just a user trying to configure the device via a PCI host.  The only thoughts I can offer on this is that simply configuring the GPIO register is likely not enough.  I would guess they would need to make sure the GPIO module is powered up via the LPSC, then make sure pinmux settings are correct, then make sure the pins are powered via the VDD3P3V_PWDN register, and then finally configure the GPIO registers to make the correct pin an output.