ASM gnu-as direction collection

.equ

this is equalivalent of #define FOO 6 in c example:

.equ LED_PIN,      25
.equ GPIO_DIR_IN,  0
.equ GPIO_DIR_OUT, 1
.equ PIN_HIGH,     1
.equ PIN_LOW,      0

https://sourceware.org/binutils/docs-2.24/as/Equ.html#Equ

.syntax

https://sourceware.org/binutils/docs/as.html#Instruction-Set-Syntax https://www.sourceware.org/binutils/docs/as/ARM-Directives.html#index-_002esyntax-directive_002c-ARM

this is either unified or divided