STC micro STC8A8K64D4 Series - Page 210

STC8A8K64D4 Series Manual
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MOV P1, A
MOV A, R0 ;P2 = ~(LCD_buff[j|4] & 0xf0);
ADD A, #4
MOV R0, A
MOV A, @R0
ANL A, #0f0H
CPL A
MOV P2, A
SJMP L_LCD_Scan3
L_LCD_Scan2: ; Normal phase scan
MOV A, @R0 ;P1 = LCD_buff[j];
MOV P1, A
MOV A, R0 ;P2 = (LCD_buff[j|4] & 0xf0);
ADD A, #4
MOV R0, A
MOV A, @R0
ANL A, #0f0H
MOV P2, A
L_LCD_Scan3:
MOV DPTR, #T_COM ;A COM is set as push-pull output mode
MOV A, R7
MOVC A, @A+DPTR
ORL P2M0, A
CPL A
ANL P2M1, A
INC scan_index ;if(++scan_index == 8) scan_index = 0;
MOV A, scan_index
CJNE A, #8, L_QuitLcdScan
MOV scan_index, #0
L_QuitLcdScan:
RET
;******************* Standard font**************************
T_Display:
; 0 1 2 3 4 5 6 7 8 9 A B C D E F
DB 03FH,006H,05BH,04FH,066H,06DH,07DH,007H,07FH,06FH,077H,07CH,039H,05EH,079H,071H
; black -
DB 000H,040H
;****************** Load display functions for numbers 1 to 6, and the algorithm is simple ***************************
F_LCD_load: ;R6 is the number, which is 1~6, R7 is the number to be displayed
MOV DPTR, #T_Display ;i = t_display[dat];
MOV A, R7
MOVC A, @A+DPTR
MOV B, A ;the number to be displayed
MOV A, R6
CJNE A, #1, L_NotLoadChar1
MOV R0, #LCD_buff
MOV A, @R0
MOV C, B.3 ;D
MOV ACC.6, C
MOV @R0, A
INC R0
MOV A, @R0
MOV C, B.2 ;C