cstartup.arm

ARM入门的好帮手.包含了从简单到相对较复杂的程序.

;------------------------------------------------------------------------------
;-         ATMEL Microcontroller Software Support  -  ROUSSET  -
;------------------------------------------------------------------------------
; The software is delivered "AS IS" without warranty or condition of any
; kind, either express, implied or statutory. This includes without
; limitation any warranty or condition with respect to merchantability or
; fitness for any particular purpose, or against the infringements of
; intellectual property rights of others.
;-----------------------------------------------------------------------------
;- File source          : cstartup.arm
;- Object               : C startup  for EB40 
;-
;- 1.0 05/11/00 EL      : Creation Green Hills
;------------------------------------------------------------------------------

                INCLUDE     ../../targets/eb40/eb40.inc


; *****************************************************************************
;               Angel Rom Monitor Method
;- Preprocessor Flag can be set : SEMIHOSTING
; *****************************************************************************

                IF  :DEF:AT91_DEBUG_ANGEL; {
                INCLUDE     ../../targets/cstartup_angel.arm
;----------------------------------------------------------------------
; Call __low_level_init to perform initialization before initializing
; AIC and calling main.
; Diasable all peripherial clock
;----------------------------------------------------------------------
__low_level_init
                mov         pc,r14              ; Return
                ENDIF                           ; AT91_DEBUG_ANGEL }

; *****************************************************************************
;               ICE or Sram Method
;- Preprocessor Flag can be set : SEMIHOSTING
; *****************************************************************************

                IF  :DEF:AT91_DEBUG_ICE; {
                INCLUDE     ../../targets/cstartup_ice.arm
;----------------------------------------------------------------------
; Call __low_level_init to perform initialization before initializing
; AIC and calling main.
; Enable all peripherial clock
; The peripheral clocks are automatically enabled after a reset.
;----------------------------------------------------------------------
__low_level_init
                mvn         r0,#0               ; R0<- 0xFFFFFFFF
                ldr         r1,=PS_BASE         ; Get Power saving configuartion
                str         r0,[r1, #PS_PCER]   ; Enable all peripherial clock
                mov         pc,r14              ; Return

                ENDIF                           ; AT91_DEBUG_ICE  }

; *****************************************************************************
;               Flash Method
; *****************************************************************************

                IF  :DEF:AT91_DEBUG_NONE; {
                INCLUDE     ../../targets/cstartup_flash.arm
;----------------------------------------------------------------------
; Call __low_level_init to perform initialization before initializing
; AIC and calling main.
; Diasable all peripherial clock
;----------------------------------------------------------------------
__low_level_init
                mov         pc,r14              ; Return
                ENDIF                           ; AT91_DEBUG_NONE }

 

        END