文本显示器汇编源代码程序

LJMP L0A49H
L0006H:
RET
DB 02H
L0008H:
RET
LJMP L0202H /*产生复位*/
XRL A, #00H
MOV R3, 29H
MOV R2, 28H
CLR 09H
CLR 0AH
LCALL L08A3H
MOV A, #10H
ADD A, 29H
L005DH:
SJMP L003CH
L005FH:
MOV A, R7
JNZ L0065H
SETB C
SJMP L0066H
L0065H:
CLR C
L0066H:
LCALL L0A46H /*开外部中断 0 用于通讯快速响应*/
LCALL L0A40H /*关闭时钟 片选信号*/
LCALL L09C2H /*初始化液晶*/
LCALL L001EH
XRL A, #5AH /*原 XRL A, #5AH */
JZ L0038H
CLR C
RET
L0038H:
MOV R5, #00H
MOV R4, #70H
MOV R2, A
CLR 09H
CLR 0AH
POP ACC
MOV R7, A
LCALL L08A3H
RET
L00F1H:
SETB 0BH
LCALL L010BH
MOV A, R7
JZ L0124H
RET
L012BH: /*初始化 */
LCALL L0A43H /*打开定时器0 */
MOV R3, DPL
MOV R2, A
CLR 09H
CLR 0AH
MOV R7, 26H
LCALL L08A3H
L00C9H:
MOV A, 26H
LCALL L0026H /* 判断在0x7FFF(0x5A)的值 是否为用户程序*/
MOV 00H, C /*识别标志位*/
LCALL L0A64H /*开所有中断*/
SETB 09H /*启动09标志位*/
MOV R7, A
L010BH:
LCALL L0D07H
MOV 22H, R7
MOV A, 22H
ANL A, #7FH
JZ L0119H
LCALL L0BF5H
MOV 28H, R3
MOV A, 28H
ANL A, #0F0H
JZ L00C9H
MOV A, 28H
SWAP A
ANL A, #0FH
MOV 23H, #00H
CLR A
MOV R7, A
MOV DPTR, #7FFEH /* 判断此值 如为0x5A 则显示no data pls down*/
MOVC A, @A+DPTR
MOV B, #10H
MUL AB
ADD A, #3AH
MOV DPL, A
MOV A, B
ADDC A, #05H
MOV R3, DPL
CLR A
MOVC A, @A+DPTR
ADD A, R7
MOV R7, A
MOV A, R5
DEC R5
JNZ L005DH
DEC R4
L003CH:
SETB C
MOV A, R5
SUBB A, #00H
MOV A, R4
SUBB A, #00H
JC L005FH 2AH, #02H
LCALL L0067H /*显示 no*/
MOV R7, #60H
MOV R5, #10H
MOV R2, #07H
MOV 2BH, A
L0072H:
MOV A, 2BH
CLR C
SUBB A, 2AH
JNC L009DH
MOV R7, 26H
MOV R5, 27H
MOV A, 23H
MOV R2, 22H
JNZ L004FH
INC 22H
L004FH:
DEC A
MOV DPL, A
MOV DPH, R2
INC 2BH
SJMP L0072H
L009DH:
RET
/*........................*/
L009EH:
MOV 26H, R7
MOV 27H, R5
MOV R3, #1AH
MOV 2AH, #04H
LCALL L0067H /*显示 data*/
RET
L001EH:
DB 75H, 0A0H
L0020H:
MOV R7, A
RET
LJMP L0260H
NOP
L0026H:
MOV 22H, #10H
MOV 29H, A
CLR A
ADDC A, 28H
MOV 28H, A
MOV A, #08H
ADD A, 26H
MOV 26H, A
MOV R7, A
MOV R7, A
MOV R7, A
MOV R7, A
MOV R7, A
MOV R7, A
MOV R7, A
MOV R7, A
L0119H:
MOV R7, 22H
RET
L011CH:
LCALL L0D07H
MOV A, R7
ANL A, #7FH
JNZ L011CH
L0124H:
MOV 39H, R5
LCALL L087BH
RET
L00F9H:
MOV R7, #3FH
LCALL L09DBH
RET
LJMP LFFFFH
IAP_RUN EQU 0FF81H
PGM_MTP EQU 0FFF0H
AUXR1 equ 0xA2
ORG 0000H
LJMP L0DB8H
L0003H: /*外部中断0 通讯中断入口地址*/
LCALL L04A2H
L0152H:
JB 00H, L0197H /*是否有用户数据 没有则显示 no data pls domn*/
MOV R7, #48H
MOV R5, #10H
MOV R2, #06H
RET
/*..................*/
L0067H:
MOV 26H, R7
MOV 27H, R5
MOV 28H, R2
MOV 29H, R3
CLR A /*液晶刷新*/
ANL A, #0FH
MOV B, #10H
MUL AB
ADD A, #3AH
MOV DPL, A
MOV A, B
ADDC A, #05H
ADD A, #08H
MOV R7, A
MOV A, R7
PUSH ACC
MOV R5, 27H
MOV A, 28H
ANL A, #0FH
L000EH:
MOV R2, #06H
MOV R3, #3AH
CLR 09H
CLR 0AH
LCALL L08A3H
RET
L001AH:
LCALL L083AH
LCALL L01F5H /*开启液晶背光*/
LCALL L0BF5H /* beep 上电响一次*/
LCALL L0CE3H /*识别 通讯中断 外部中断0 是否关闭 */
JNC L0152H