Re: Definiowane portów/flag w C - Grupy dyskusyjne w eGospodarka.pl

eGospodarka.pl › Grupy › pl.misc.elektronika › Definiowane portów/flag w C › Re: Definiowane portów/flag w C

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Subject: Re: Definiowane portów/flag w C
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> A na bezczelnego ?
>
> #define F_LED GPIO,7
>
> ... setbit(F_LED) ...
>
> https://gcc.gnu.org/onlinedocs/cpp/Argument-Prescan.
html
>

Do takiego zadzialania potrzeba "podwojnego makra":

#define _test_set_bit(port,pin) do{ (port)->PDOR |=(1<<(pin)); }while(0)
#define test_set_bit(x) _test_set_bit(x)
#define LEG_G_7 GPIOB,7

i wtedy
test_set_bit(LEG_G_7);
preprocesor rozwinie poprawnie:
do{ (((GPIO_Type *)(0x400FF040u)))->PDOR |=(1<<(7)); }while(0);

Przy pojedynczym makro (jak pierwsze) arm-none-eabi-gcc zglasza blad ze makro ma miec
2 parametry a przekazany jest tylko 1.

$ arm-none-eabi-gcc -E -mcpu=cortex-m0plus makro.c -o makro2.lst
makro.c:14:23: error: macro "test_set_bit" requires 2 arguments, but only 1 given
test_set_bit(LEG_G_7);

Marcin