ledcon.s

来自「LED控制 ARM LPC2129 汇编程序」· S 代码 · 共 35 行

                	  INCLUDE     LPC2294.INC
           
LEDCON  	  EQU         0x02000000
               	  EXPORT   MAIN
               	  AREA       LEDCONC,CODE,READONLY
           
MAIN       	  LDR         R0,=PINSEL0 
               	  MOV        R1,#0x00000000
             		  STR         R1,[R0]
          		  LDR         R0,=PINSEL1
                	  STR         R1,[R0]
           
          	 	  LDR         R0,=IO0DIR
          	 	  LDR         R1,=LEDCON
          	  	  STR         R1,[R0]
           
MAIN_LOOP 	  LDR         R1,=LEDCON
LEDSET    	  LDR         R0,=IO0SET
          		  STR         R1,[R0]
          		  BL           DELAYS
LEDCLR   	  LDR         R0,=IO0CLR
           		  STR         R1,[R0]
         		  BL           DELAYS
       	 	  B             MAIN_LOOP
           
DELAYS
         		 MOV         R7,#0x000FF000
DELAYS_L1    	 SUBS        R7,R7,#1
         		 BNE          DELAYS_L1
          		 MOV         PC,LR
           
         		 ALIGN
          		 LTORG
           
          		 END