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实战六、LCD显示单个B字(Actual combat six and LCD display a single B word)
实战六、LCD显示单个B字(Actual combat six and LCD display a single B word)
Actual combat 6, LCD shows a single B word
The purpose of this fight is to make you familiar with the MCD1 LCD reading and writing methods
The program file name MCD-LCD1.ASM
The procedure list is as follows:
**********************************************;
STATUS EQU 3H; defines the status register address
PORTA EQU 5H; defines the address of the RA port data register
PORTC EQU 7H; defines the address of the RC port data register
TRISA EQU 85H; defines the address control register address of the RA port
TRISC EQU 87H; defines the address control register address of the RC port
ADCON1 EQU 9FH; defines the address of the ADC module control register 1
********************;
Z EQU 2; defines the bit address of the 0 status bit
RP0 EQU 5; defines the bit address of the page select RP0
*********************;
RS EQU 1; the LCD register select pin is defined at the RA.1 pin
RW EQU 2; the LCD read / write signal pin is defined at the RA.2 pin
E EQU 3; LCD chip select signal is defined in the RA.3 foot foot
**********************;
ORG 000H
NOP; place an empty operation command required by ICD
GOTO MAIN
ORG 0008H
MAIN
BSF, STATUS, RP0; define the RA port, and the RC port is all output
MOVLW 07H
MOVWF ADCON1; set the RA port all for the ordinary digital IO port
MOVLW 00H
MOVWF TRISA
MOVWF TRISC
BCF, STATUS, RP0
CALL DELAY; when calling Ting, just power up, LCD reset does not necessarily have PIC fast
MOVLW 01H
MOVWF PORTC screen;
CALL ENABLE
MOVLW 38H
MOVWF PORTC; 8 bit, 2 line 5x7 dot matrix
CALL ENABLE
MOVLW 0FH
MOVWF PORTC; displays open, cursor open, blinking open
CALL ENABLE
MOVLW 06H
MOVWF PORTC; the text does not move and the cursor moves right
CALL ENABLE
MOVLW 0C0H
MOVWF PORTC; writes the display start address (the first line in the first position)
CALL ENABLE
MOVLW 42H
MOVWF PORTC; code for the letter B
BSF, PORTA, RS
BCF, PORTA, RW
BCF, PORTA, E
CALL DELAY
BSF, PORTA, E
$GOTO
ENABLE
BCF, PORTA, RS; subrou
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