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Re: [avr-libc-dev] Determine defined port

From: Harald Kipp
Subject: Re: [avr-libc-dev] Determine defined port
Date: Sun, 22 Aug 2004 18:35:31 +0200

I found a simpler solution myself by using the ## operator.

The user specifies what he easily understands

  #define MY_PORT  PORTC

There is still an enumerated list required

  #define GPIO_PORTA  1
  #define GPIO_PORTC  3

but it is hidden from the user. The code will use

  #define MY_GPIO  GPIO_##MY_PORT


  sbi(MY_PORT, 7);

will allow to add port specific code.

Yeah, I was too fast with asking questions, but may be one day someone
else benefits from this monologue. :-)

Thanks again,


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