set7219.asm

汇编程序(cygnal c8051f021)

RS7219:	  MOV DAT1,#09H //硬件译码
					MOV DAT2,#0FFH 
					LCALL SEND
					MOV DAT1,#0AH //强度5
					MOV DAT2,#04H
					LCALL SEND
					MOV DAT1,#0BH //限扫4
					MOV DAT2,#03H
					LCALL SEND						
					MOV DAT1,#0CH// 启动	
					MOV DAT2,#01H
					LCALL SEND
					RET

SEND:			MOV R0,#08H
					CLR LOAD
					MOV 040H,A
					PUSH 040H
SENDLOOP: CLR CLK										
					MOV C,DAT1.7
					MOV DIN,C
					SETB CLK
					MOV A,DAT1
					RL A
					MOV DAT1,A
					DJNZ R0,SENDLOOP
SEND1:		MOV R3,#08H
SENDLOOP1:CLR CLK
					MOV C,DAT2.7
					MOV DIN,C
					SETB CLK
					MOV A,DAT2
					RL A
					MOV DAT2,A
					DJNZ R3,SENDLOOP1
					SETB LOAD
					POP 040H
					MOV A,040H
					RET