sys_int.asm

来自「DSP变频调速」· 汇编 代码 · 共 32 行

*************************************************************************************
; file name: START
*************************************************************************************
	.include "x24x.h"
	.def	sys_int
;====================================================================================
stack	.set	0300H	         
;====================================================================================
sys_int:
;------------------------------------------------------------------------------------
; set clock 20MHz input CPU=20MHz, SYSTEM clock 10MHz
;------------------------------------------------------------------------------------
	LDP		#0E0H 
	SPLK	#0041H,CKCR0		;SYSCLK=CPUCLK/2,  
	SPLK	#00BBH,CKCR1		 
;	SPLK	#00C1H,CKCR0        ;enable the pll to X4
	SPLK	#40C0h,SYSCR		;CLKOUT=CPUCLK	
;------------------------------------------------------------------------------------
	SETC    INTM				;mask all intterrupt
	CLRC    CNF					;configure B0 to data memory	
	CLRC    OVM					;
	SPM     0					;
	CLRC    SXM					;
;------------------------------------------------------------------------------------
	LDP		#0H
	SPLK	#0h,IMR				;Mask all Ints
	SPLK	#0FFh,IFR			;Clear all Int Flags
;------------------------------------------------------------------------------------
	LAR		AR2,#stack
;------------------------------------------------------------------------------------	
	RET