option.inc

s3c2440芯片嵌入linux（2.6内核）系统后的LED控制程序。通过它可以学习再linux下一般I/O口的操作方法

;===========================================
; NAME: OPTION.A
; DESC: Configuration options for .S files
; HISTORY:
; 02.28.2002: ver 0.0
; 03.11.2003: ver 0.0	attached for 2440.
; jan E, 2004: ver0.03  modified for 2440A01.
;===========================================

;Start address of each stacks,
_STACK_BASEADDRESS	EQU 0x33ff8000
_MMUTT_STARTADDRESS	EQU 0x33ff8000
_ISR_STARTADDRESS	EQU 0x33ffff00

		GBLL	USE_MAIN 
;USE_MAIN	SETL	{TRUE}
USE_MAIN	SETL	{FALSE}

		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	UCLK
UCLK	SETA	48000000

		GBLA	XTAL_SEL
		GBLA	FCLK
		GBLA	CPU_SEL

;(1) Select CPU 	
;CPU_SEL	SETA	32440000	; 32440000:2440X.
CPU_SEL SETA	32440001	; 32440001:2440A

;(2) Select XTaL
XTAL_SEL	SETA	12000000
;XTAL_SEL	SETA	16934400

;(3) Select FCLK
FCLK		SETA	304000000
;FCLK		SETA	296352000
		
;(4) Select Clock Division (Fclk:Hclk:Pclk)
CLKDIV_VAL	EQU	7	; 0=1:1:1, 1=1:1:2, 2=1:2:2, 3=1:2:4, 4=1:4:4, 5=1:4:8, 6=1:3:3, 7=1:3:6.
			


 [ XTAL_SEL = 12000000
 
	[ FCLK = 271500000
M_MDIV		EQU	173		;Fin=12.0MHz Fout=271.5MHz
M_PDIV		EQU	2
		[ CPU_SEL = 32440001
M_SDIV		EQU	2		; 2440A
   		|
M_SDIV		EQU	1		; 2440X
   		]
	]
	
	[ FCLK = 304000000
M_MDIV		EQU	68		;Fin=12.0MHz Fout=304.8MHz
M_PDIV		EQU	1
		[ CPU_SEL = 32440001
M_SDIV		EQU	1		; 2440A
		|
M_SDIV		EQU	0		; 2440X
		]
	]


	[ UCLK = 48000000
U_MDIV		EQU	56		;Fin=12.0MHz Fout=48MHz
U_PDIV		EQU	2
U_SDIV		EQU	2
	]
	[ UCLK = 96000000
U_MDIV		EQU	56		;Fin=12.0MHz Fout=96MHz
U_PDIV		EQU	2
U_SDIV		EQU	1

	]

  |	; else if XTAL_SEL = 16.9344Mhz

	[ FCLK = 266716800
M_MDIV		EQU	118	;Fin=16.9344MHz
M_PDIV		EQU	2
		[ CPU_SEL = 32440001
M_SDIV		EQU	2		; 2440A
		|
M_SDIV		EQU	1		; 2440X
		]
	]
	
	[ FCLK = 296352000
M_MDIV		EQU	97	;Fin=16.9344MHz
M_PDIV		EQU	1
		[ CPU_SEL = 32440001
M_SDIV		EQU	2		; 2440A
		|
M_SDIV		EQU	1		; 2440X
		]
	]
	[ FCLK = 541900800
M_MDIV		EQU	120	;Fin=16.9344MHz
M_PDIV		EQU	2
		[ CPU_SEL = 32440001
M_SDIV		EQU	1		; 2440A
		|
M_SDIV		EQU	0		; 2440X
		]
	]
	
	[ UCLK = 48000000
U_MDIV		EQU	60	;Fin=16.9344MHz Fout=48MHz
U_PDIV		EQU	4
U_SDIV		EQU	2
	]
	[ UCLK = 96000000
U_MDIV		EQU	60	;Fin=16.9344MHz Fout=96MHz
U_PDIV		EQU	4
U_SDIV		EQU	1
	]
	
   ]	; end of if XTAL_SEL = 12000000.
  

	END