微处理器开发

开发平台：

Unix_Linux

option.s：源码内容

							;===========================================
; NAME: OPTION.A
; DESC: Configuration options for .S files
; HISTORY:
; 02.28.2002: ver 0.0
;===========================================
SDRAM_END			EQU	0x34000000
;Start address of each stacks,
_STACK_BASEADDRESS	EQU (SDRAM_END-0x8000)	;0x33ff8000
_MMUTT_STARTADDRESS	EQU (SDRAM_END-0x8000)	;0x33ff8000
_ISR_STARTADDRESS	EQU (SDRAM_END-0x100)	;0x33ffff00
		GBLL 	PLL_ON_START  
PLL_ON_START	SETL 	{TRUE}
		GBLL	ENDIAN_CHANGE
ENDIAN_CHANGE	SETL	{FALSE}
		GBLA	ENTRY_BUS_WIDTH
ENTRY_BUS_WIDTH	SETA	16	
;BUSWIDTH = 16,32
		GBLA    BUSWIDTH	;max. bus width for the GPIO configuration
BUSWIDTH	SETA    32
		GBLA	FCLK
FCLK		SETA	50000000
	[ FCLK = 50000000	
M_MDIV		EQU	0x5c	;Fin=12.0MHz Fout=50.0MHz
M_PDIV		EQU	0x4
M_SDIV		EQU	0x2
    	]
	END

						