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DM365 GPIO registers

Michael16400
Intellectual 515 points

Hello,

I want to initialize some GPIO registers in my GEL file in order to light a debug LED on my board (very simple).

On chapter 6.8.1 there are all the registers but it's not clear what register address I should use. How do I apply the offset number in the first column of table 6-11 to my application?

I just want to set the value of a pin in assembly...

Thanks,

Mike

  • 0
    TI__Mastermind 37340 points

    Since you mention GEL file, I assume you are using CCS.  If so, the Target Content tests available from Spectrum Digital may be your best starting point.  It has a gpio library.

  • 0 in reply to Juan Gonzales
    Intellectual 515 points

    Thanks!

    The value for the GPIO register is: 0x01C67000

    In the code, they do the following: "GPIO_PCR = 1" (commented "Free GPIO from emulation"). It acts on the memory address 0x01C67004 which is not documented in the SPRUFH8B user guide. Is it necessary to do that step?

    Also when I want to switch on a LED, I first set the output direction corresponding to the pin to 0 (output) using DIR and then launch SET_DATA and nothing happens, i.e. the LED does not bright. When I'm printing the registers, the corresponding pin in the OUT_DATA register are set (which is what I would expect) but also in the SET_DATA and in CLR_DATA (weird!) registers.

    Did I do anything wrong?

     

    Thanks,

    Mike

     

    Juan Gonzales said:

    Since you mention GEL file, I assume you are using CCS.  If so, the Target Content tests available from Spectrum Digital may be your best starting point.  It has a gpio library.