led.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 "LEDTEST.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
OUTPUT             .set  4402H
CLKMD              .set  1C00h  ;Added by zy	
                   .def  _c_int00
STACK				.usect "stack",100  
                   .text
_c_int00:         
                    ;MOV #2002H,CLKMD
                    MOV #00H, DPH  ;Copy of the 9 most significant bits of the data page register (DP)
                    BCLR C54CM ;ASM is ignored,不兼容C54模式
		      		BCLR CPL   ;用DP寻址,DP direct addressing mode
					BCLR TC1
					BCLR TC2   ;Test/control flag 1
					
					MOV #0110001110110111B,CLKMD  ;七倍频,二分频
					RPT #100
					NOP
LOOP_1:

                   MOV #1103H,    6C00H    ;Data EMIF mode(Parallel Port Mode=00)
			       MOV #01H,0CH
			       MOV #2000H,	 LEDAddr1
			       
			       ;在地址线上用示波器观察是否有方波
			       MOV #0000H,0800H
			       MOV #0000H,0801H
			       MOV #0000H,0803H
			       NOP
			       NOP
			       ;;;MOV #0000H,7FDH
			       ;;;MOV #1,0CH
			       MOV #0000H,0803H     ;EMIF CE0 space control register 允许?
			       MOV #1103H,6C00h
			       MOV #0000H,4400H     ;AGPIOEN 允许A[15:0]输出地址
			       MOV #0ffffH,4401H    ;AGPIODIR 将A[15:0]设为输出(AGPIODIR) IMPORTANT!!!!
			       
			       MOV #5555h,OUTPUT    ;AGPIODATA 输出数据到地址线上
			       ;;;;MOV #0014H,6C00h
			       nop
			       nop
			       MOV #0000H,4400H     ;允许A[15:0]输出地址
			       MOV #0ffffH,4401H     ;将A[15:0]设为输出(AGPIODIR) IMPORTANT!!!!
			       
			       MOV #0AAAAh,OUTPUT   ;输出数据到地址线上
			       nop
			       nop
			       ;以下五句可观测到XF脚的高低电平的变化
			       BSET XF
			       CALL   delay1s
			       BCLR XF
			       NOP
			       CALL   delay1s
			      
			      		      			       
			       B 		 LOOP_1
                    
delay1s:
					MOV	#3000,	AR3   ;STM
delay_1				
					RPT	#6FFH
					NOP
					NOP
					NOP
					BANZ	delay_1,	*AR3-
					NOP
					NOP
 					RET
                   .end