Compiler/F28M35H52C: meaning of different GPIO registers?

Erik,

GpioCtrlRegs and GpioG1CtrlRegs are identical, as you can see they are defined by the same struct.

They are also assigned to the same memory address in the nonBIOS.cmd file.

   UNION run =           GPIOG1CTRL,  PAGE = 1
   {
       GpioCtrlRegsFile
       GpioG1CtrlRegsFile
   }
   UNION run =           GPIOG1DAT,  PAGE = 1
   {
       GpioDataRegsFile
       GpioG1DataRegsFile
   }
   UNION run =           GPIOG1TRIP,  PAGE = 1
   {
       GpioTripRegsFile
       GpioG1TripRegsFile
   }

You can use either struct whenever you like. I do not have a good reason why the GPIO registers were split into two structures GpioG1 and GpioG2. However I do suspect that GpioCtrlRegs was kept for backwards compatibility purposes so that a customer could directly reuse existing source code.

Regards,
Cody