ST7038 Datasheet, PDF (39/63 Pages) Sitronix Technology Co., Ltd. – Dot Matrix LCD Controller/Driver

ST7038
Initial Code (8051 MPU, Parallel 8-bit Interface)
;---------------------------------------------------------------------------------
INITIAL_START:
CALL HARDWARE_RESET
CALL DELAY40mS
MOV A,#32H
;FUNCTION SET
CALL WRINS_NOCHK ;8 bit,
CALL DELAY40uS
MOV A,#32H
;FUNCTION SET
CALL WRINS_NOCHK ;8 bit,
CALL DELAY40uS
MOV
A,#54H
;Internal OSC frequency
adjustment
CALL WRINS_CHK
CALL DELAY40uS
MOV A,#31H
;FUNCTION SET
CALL WRINS_CHK
;8 bit,
CALL DELAY40uS
MOV A,#7FH
;Contrast set
CALL WRINS_CHK
CALL DELAY40uS
MOV A,#53H
;Power down/Contrast set
CALL WRINS_CHK
CALL DELAY40uS
MOV A,#14H
; Bias/Follwer set
CALL WRINS_CHK
CALL DELAY40uS
MOV A,#67H
; ICON/Power(B,R,F) set
CALL WRINS_CHK
MOV P1,#FFH
;For Check Busy Flag
RET
;---------------------------------------------------------------------------------
CHK_BUSY:
;Check Busy Flag
CLR
RS
SETB RW
SETB E
JB
P1.7,$
CLR
E
RET
CALL DELAY200mS
;for power stable
MOV A,#0CH
;DISPLAY ON
CALL WRINS_CHK
CALL DELAY40uS
MOV A,#01H
;CLEAR DISPLAY
CALL WRINS_CHK
CALL DELAY2mS
;---------------------------------------------------------------------------------
MAIN_START:
XXXX
XXXX
XXXX
;---------------------------------------------------------------------------------
WRINS_CHK:
CALL CHK_BUSY
WRINS_NOCHK:
CLR
RS
;EX:Port 3.0
CLR
RW
;EX:Port 3.1
SETB E
;EX:Port 3.2
MOV P1,A
;EX:Port 1=Data Bus
CLR
E
Ver 1.3
39/63
2008/05/27