ram_fill.asm

来自「C & Asm source code for cygnal microcont」· 汇编 代码 · 共 63 行

;-----------------------------------------------------------------------------
;	CYGNAL INTEGRATED PRODUCTS, INC.
;
; 	FILE NAME  	: RAM_FILL.ASM 
;  DATE        : 12 OCT 01
; 	TARGET MCU	: C8051F30x
; 	DESCRIPTION	: This program disables the watchdog timer and fills RAM with 
;				  	  value equal to address.
;
;  	NOTES:
;	(1)	This note intentionally left blank.
;
;
;-----------------------------------------------------------------------------

$include (c8051F300.inc)                  ; Include register definition file

;-----------------------------------------------------------------------------
; EQUATES
;-----------------------------------------------------------------------------


;-----------------------------------------------------------------------------
; VARIABLES
;-----------------------------------------------------------------------------
	
																
;-----------------------------------------------------------------------------
; RESET and INTERRUPT VECTORS
;-----------------------------------------------------------------------------

            ; Reset Vector
            CSEG AT 00h					
            ljmp  Main                    ; Jump beyond interrupt vector 
                                          ; space.

;-----------------------------------------------------------------------------
; CODE SEGMENT
;-----------------------------------------------------------------------------


RAM_Fill    segment  CODE

            rseg     RAM_Fill             ; Switch to this code segment.
            using    0                    ; Specify register bank for the
                                          ; following program code.

Main:
            ; Disable the WDT.
            anl   PCA0MD, #NOT(040h)      ; clear Watchdog Enable bit

            mov   R0, #00H                ; use R0 as pointer to memory location 
loop:       mov   @R0, AR0                ; write to indexed address with 
                                          ; address value
            djnz  R0, loop                ; check if finished
	
            sjmp  $                       ; loop here forever


;-----------------------------------------------------------------------------
; End of file.

END