option.inc

来自「西铁成的320*240单色G3244液晶屏在44b0下的驱动及测试程序,适合大部」· INC 代码 · 共 54 行

;汇编程序设置

_ISR_STARTADDRESS   EQU   0xc7fff00

;16位或者32位总线设置
                GBLA    BUSWIDTH
BUSWIDTH	SETA    16

;DRAM或者SDRAM"
                GBLS    BDRAMTYPE
BDRAMTYPE	SETS    "SDRAM"

;这个值在Flash存储器编程时应该为真
;这个值在SDRAM存储器编程时应该为假
                GBLL    PLLONSTART
PLLONSTART      SETL    {TRUE}

	GBLA	PLLCLK
PLLCLK		SETA	16000000

	[	PLLCLK = 16000000	
;系统主频计算公式如下：
;Fout = (8+ M_DIV)*Fout/[(2+P_DIV)*2]
M_DIV	EQU	8	;Fout = Fin * 2
P_DIV	EQU	2
S_DIV	EQU	1
	]

	[	PLLCLK = 24000000	
M_DIV	EQU	16	;Fout = Fin * 3
P_DIV	EQU	2
S_DIV	EQU	1
	]

	[	PLLCLK = 32000000	
M_DIV	EQU	24	;Fout = Fin * 4
P_DIV	EQU	2
S_DIV	EQU	1
	]

	[	PLLCLK = 48000000	
M_DIV	EQU	40	;Fout = Fin * 6
P_DIV	EQU	2
S_DIV	EQU	1
	]

	[	PLLCLK = 64000000	
M_DIV	EQU	56	;Fout = Fin * 8
P_DIV	EQU	2
S_DIV	EQU	1
	]

;************************************************
	END