; Load Constant Definitions

#include "core$\_$cm$4\_$constants.s$"$

; Load STM$32$L$476$xx Constants

#include $"$stm$32$l$476$xx$\_$constants.s$"$

; Green LED $<-->$ PA$\mathrm{.}5$

LED$\_$PIN EQU $5$

AREA main, CODE, READONLY

EXPORT $\_\_$main ; make $\_\_$main visible to linker

ENTRY

$\_\_$main PROC

; Enable the clock to GPIO Port A

LDR r$0,=$RCC$\_$BASE

LDR r$1,[$r$0,$ #RCC$\_$AHB$2$ENR$\_$OFFSET$]$

ORR r$1,$ r$1,$ #$(1<<$ RCC$\_$AHB$2$ENR$\_$GPIOAEN$\_$Pos$)$ ; Enable GPIO Port A clock

STR r$1,[$r$0,$ #RCC$\_$AHB$2$ENR$\_$OFFSET$]$

; MODE: $00$: Input mode, $01$: General purpose output mode

; $10$: Alternate function mode, $11$: Analog mode $($reset state$)$

LDR r$0,=$GPIOA$\_$BASE

LDR r$1,[$r$0,$ #GPIO$\_$MODER$\_$OFFSET$]$

BIC r$1,$ r$1,$ #$(3<<(2*$ LED$\_$PIN$))$ ; Clear mode bits for PA$5$

ORR r$1,$ r$1,$ #$(1<<(2*$ LED$\_$PIN$))$ ; Set mode bits to output for PA$5$

STR r$1,[$r$0,$ #GPIO$\_$MODER$\_$OFFSET$]$

; Set pin PA$5$ output data register to high to turn on the LED

LDR r$1,[$r$0,$ #GPIO$\_$ODR$\_$OFFSET$]$

ORR r$1,$ r$1,$ #$(1<<$ LED$\_$PIN$)$ ; Set bit for PA$5$

STR r$1,[$r$0,$ #GPIO$\_$ODR$\_$OFFSET$]$

stop B stop ; dead loop & program hangs here

ENDP

ALIGN

AREA myData, DATA, READWRITE

ALIGN

array DCD $1,2,3,4$

END why does it say invalid line start at the $2$ include lines