stlc542.asm

来自「单片机混合编程 嵌入式/单片机编程单片机混合编程 嵌入式/单片机编程」· 汇编 代码 · 共 59 行

; 这是被CALLT542.C调用的TLC542汇编程序，文件名为STLC542.ASM

   ?PR?_a_func?SPL2     SEGMENT CODE
   ?DT?_a_func?SPL2     SEGMENT DATA OVERLAYABLE
   ?DT?SPL2             SEGMENT DATA

   PUBLIC   chai
   PUBLIC   ?_a_func?BYTE
   PUBLIC    _a_func

   RSEG  ?DT?_a_func?SPL2
	 ?_a_func?BYTE:
	 aa:DS 1
   RSEG  ?DT?SPL2
	 chai:DS 1
   RSEG  ?PR?_a_func?SPL2
	 _a_func:

DOUT     EQU P1.2
CLK      EQU P1.3
CS       EQU P1.4
ADDR     EQU P1.5


	 MOV aa,R7
	 MOV R5,aa
	 NOP
	 NOP
	 NOP
	 NOP
	 NOP
	 NOP
	 NOP
	 NOP
	 NOP
	 NOP
	 CLR CS
	 PUSH PSW
	 PUSH ACC
	 MOV R3,#8
  RSA1:  MOV A,R4
	 MOV C,DOUT
	 RLC A
	 MOV R4,A
	 MOV A,R5
	 RLC A
	 MOV ADDR,C
	 MOV R5,A
	 SETB CLK
	 CLR CLK
	 DJNZ R3,RSA1
	 SETB CS
	 MOV A,R4
	 MOV R7,A
	 POP ACC
	 POP PSW
	 RET
	 END