[fpc-pascal] Assigning absolute record to variable

Koenraad Lelong fpascal at brouwerij.homelinux.net
Tue May 8 22:41:19 CEST 2012


I hope I can make myself clear.

I'm making a driver to control an LCD with an STM32 microcontroller, 
using fpc-embedded-arm.
I want to make my driver re-usable, i.e. I want to be able to pass the 
needed RST- and CS-pins only one time, so I don't need to modify the 
code in multiple places if the needed pins change.

Since a pin-port is defined this way :

  PortA: TPortRegisters		absolute (APB2Base+$0800);

I thought of defining a record :

RSTPin : record
  GPIO_Port : ^TPortRegisters;
  GPIO_Pin : word;

and assigned like this :


This does not work, the pins are not initialised when used with the 
initialising function :

    GPIO_Init(RSTPin.GPIO_Port^, GPIO_InitStructure);

does not work while

    GPIO_Init(PortA, GPIO_InitStructure);

does work.

What am I missing ? I'm out of ideas at the moment.

Thanks for any help you can give,


Koenraad Lelong.

More information about the fpc-pascal mailing list