AVR-Chat

--- In AVR-Chat@yahoogroups.com, John Samperi <samperi@a...> wrote:
>
> At 12:26 PM 2/11/2005, you wrote:
> >I was wondering if I could combine both equates to do something 
like this
> >.equ LCD_Enable = Portc, 0
> 
> No. You can make a macro that would substitute the instructions I 
guess

I've done this by equating the PORTC and the pin separately, 
something like 

.equ  LCD_PORT = PORTC
.equ  LCD_DDR  = DDRC
.equ  LCD_Epin = 3

Now in the init code I can say:

sbi LCD_DDR,LCD_Epin ; to make it an output.
cbi LCD_PORT,LCD_Epin ; to make it low

In the main code, I might

sbi LCD_PORT,LCD_Epin
cbi LCD_PORT_LCD_Epin

Which makes for very portable code.