测试行.asm

最简单的16x16的显示屏,有原理图和实际硬件调试后通过的全部代码!一起交流,共同进步!

         SCLK_595   EQU  P1.2   ;时钟
         SDATA_595  EQU  P1.1   ;数据
		 RCK_595    EQU  P1.0   ;锁存
				ORG 00H
                LJMP START
                ORG 30H
START:			MOV  P0,#0FFH
                MOV  P2,#0FFH
		        MOV  R0,#0     //
	 	        MOV  R1,#0	   	// 
				MOV  R2,#8
				MOV  R3,#0
				MOV  R5,#2
				MOV  21H,#0FFH
				//MOV  22H,#00H
START1:        // MOV  DPTR,#TAB
 WRITE:	        
				INC  R0
				//MOV  A,R1
				//MOVC A,@A+DPTR
				MOV  2AH,#00H		  //2AH送数据
				LCALL  WR_595	  //送一位数据
        	    CJNE R0,#2,WRITE	   //2组数据发完否？
				MOV  R0,#0
				LCALL  OUT_595	   //输出锁存
	            LCALL  OUT_8550	   //行输出
                //MOV  P0,#0
				//MOV  P2,#0
				LCALL  DELAY1
                LJMP START



;---------------------------------------------------------------
;行输出子程序
;---------------------------------------------------------------
OUT_8550:		
                DJNZ  R5,P0KSC
				MOV   R5,#2
P2KSC: 			CLR  C
                MOV  A,21H
P2KSC1:         RLC  A
				MOV  P2,A
				LCALL  DELAY1 
				INC  R3
				CJNE R3,#8,P2KSC1
				MOV  R3,#00H
				MOV  P2,#0FFH
				RET

P0KSC:		    CLR  C
				MOV A,21H
P0KSC1:			RLC  A
				MOV  P0,A
				LCALL  DELAY1
				INC  R3
				CJNE R3,#8,P0KSC1
				MOV  R3,#00H
				MOV  P0,#0FFH
                
              //  MOV  20H,#00H
 LOOP:         
                LJMP  OUT_8550 
;---------------------------------------------------------------
;输出锁存器输出数据子程序
;---------------------------------------------------------------
OUT_595:
                CLR  RCK_595
                NOP
                SETB RCK_595      ;上升沿将数据送到输出锁存器
                NOP
                CLR  RCK_595
                RET
;--------------------------------------------------------------
;移位寄存器接收数据子程序
;--------------------------------------------------------------
WR_595:
                MOV R2,#08H
                MOV A,2AH
WR_LOOP:
                RLC A
                MOV SDATA_595,C
                SETB SCLK_595       ;上升沿发生移位
                CLR SCLK_595
                DJNZ R2,WR_LOOP
				MOV  R2,#8
                RET
;--------------------------------------------------------------
;延时子程序
;--------------------------------------------------------------
DELAY:
                MOV 43H,#14H           ; every LED(2ms)
   DL2:         MOV 44H,#14H
   DL1:
                DJNZ 44H,DL1
                DJNZ 43H,DL2
                RET

DELAY1:         MOV  7AH,#255
DLL1:			MOV  7BH,#255
DLL2:			DJNZ 7BH,DLL2
                DJNZ 7AH,DLL1
				RET

TAB:	//DB      00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H,00H

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