newled.asm

5509开发板测试程序,通过观测XF引脚是否有方波来初步估计试验板硬件是否有问题

    .title "newled.asm"
                   .mmregs

LEDAddr0		   .set  3000h
LEDAddr1		   .set  3001h
LEDAddr2		   .set  3002h
LEDAddr3		   .set  3003h
LEDAddr4		   .set  3004h
LEDAddr5		   .set  3005h
LEDAddr6		   .set  3006h
LEDAddr7		   .set  3007h
cpldport1          .set  2000h  
swcr			   .set  2bh	
CLKMD              .set  58h  ;Added by zy	
                   .def  _c_int00
STACK				.usect "stack",100  
                   .text
_c_int00:         
                    ;对ST1进行设置
					BSET CPL   ;为"1"，直接寻址借助堆栈指针SP(埋伏笔)  原为:RSBX CPL
					BSET SXM  ;D符号扩展模式开(参见P173,P66) 原为:RSBX SXM   ;为"1"，数据进入ALU前进行符号扩展
					MOV	#00h,	SSP      ;将SP置"0"(与前两句相呼应)      
			       BCLR CPL	; Set CPL (happens at run time)
			        .CPL_off	; Tell the assembler CPL = 1
			        BSET INTM
			        
			        MOV #2002H,1C00H    ;CLKMD (Clock mode register)
					RPT #1000
					NOP
LOOP:

                   ;mov	#11111111B,	A			;1
                   MOV #0014H,    6C00H    ;External bus register is memory-mapped at port address 0xC600.
			       MOV #01H,0CH
			       MOV #2000H,	 LEDAddr1
			       
			       ;在地址线上用示波器观察是否有方波
			       MOV #0020H,0800H
			       MOV #00FFH,0801H
			       MOV #2FFFH,0803H
			       NOP
			       NOP
			       ;;;MOV #0000H,7FDH
			       ;;;MOV #1,0CH
			       MOV #0014H,6C00h      ;0000,0000,0000,0001设置EMIF为DATA EMIF mode
			       MOV #0ffffH,4401H     ;将A[15:0]设为输出(AGPIODIR) IMPORTANT!!!!
			       MOV #0000H,4400H     ;允许A[15:0]输出地址
			       MOV #0aaaah,4402H      ;输出数据到地址线上
			       nop
			       nop
			       MOV #0ffffH,4401H     ;将A[15:0]设为输出(AGPIODIR) IMPORTANT!!!!
			       MOV #0000H,4400H     ;允许A[15:0]输出地址
			       MOV #5555h,4402H      ;输出数据到地址线上
			       nop
			       nop
                   ;CALL	delay1s
                   mov	#11111111B,	AC1			;2
                   NOP
                   NOP
                   B    LOOP
			        .end