STM32 learning startup code comments-EEWORLD

Collect

;Reset_Handler subroutine starts

Reset_Handler PROC

; Output subroutine Reset_Handler to external file

EXPORT Reset_Handler [WEAK]

; Import the __main function from an external file

IMPORT __main

;Introduce SystemInit function from external file

IMPORT SystemInit

; Load the SystemInit function call address into general register R0

LDR R0, =SystemInit

; Jump to the address saved in R0 to execute the program (call SystemInit function)

BLX R0

; Load the main function call address into general register R0

LDR R0, =__main

; Jump to the address saved in R0 to execute the program (call the main function)

BX R0

;Reset_Handler subroutine ends

ENDP

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