pato-z80-home-computer/assembly/applications/hd44780_lcd_test_procedure.asm

;hd44780 lcd test procedure

LCD_INSTR_REG: EQU %00000000
LCD_DATA_REG: EQU %00000001

;reset procedure
ld a,%00111000
out (LCD_INSTR_REG),a
ld a,%00001000
out (LCD_INSTR_REG),a
ld a,%00000001
out (LCD_INSTR_REG),a

;init procedure
ld a,%00111000
out (LCD_INSTR_REG),a
ld a,%00001110
out (LCD_INSTR_REG),a

;write characters to display
ld a,%01000100
out (LCD_DATA_REG),a
ld a,%01100001
out (LCD_DATA_REG),a
ld a,%01101110
out (LCD_DATA_REG),a
ld a,%01101001
out (LCD_DATA_REG),a
ld a,%01100101
out (LCD_DATA_REG),a
ld a,%01101100
out (LCD_DATA_REG),a
ld a,%01100101
out (LCD_DATA_REG),a
ld a,%00100001
out (LCD_DATA_REG),a

halt
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00			`;hd44780 lcd test procedure`

hd44780 display debugger 2020-10-18 14:47:46 +02:00			`LCD_INSTR_REG: EQU %00000000`
			`LCD_DATA_REG: EQU %00000001`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00
			`;reset procedure`
			`ld a,%00111000`
hd44780 display debugger 2020-10-18 14:47:46 +02:00			`out (LCD_INSTR_REG),a`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00			`ld a,%00001000`
hd44780 display debugger 2020-10-18 14:47:46 +02:00			`out (LCD_INSTR_REG),a`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00			`ld a,%00000001`
hd44780 display debugger 2020-10-18 14:47:46 +02:00			`out (LCD_INSTR_REG),a`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00
			`;init procedure`
			`ld a,%00111000`
hd44780 display debugger 2020-10-18 14:47:46 +02:00			`out (LCD_INSTR_REG),a`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00			`ld a,%00001110`
hd44780 display debugger 2020-10-18 14:47:46 +02:00			`out (LCD_INSTR_REG),a`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00
			`;write characters to display`
			`ld a,%01000100`
hd44780 display debugger 2020-10-18 14:47:46 +02:00			`out (LCD_DATA_REG),a`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00			`ld a,%01100001`
hd44780 display debugger 2020-10-18 14:47:46 +02:00			`out (LCD_DATA_REG),a`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00			`ld a,%01101110`
hd44780 display debugger 2020-10-18 14:47:46 +02:00			`out (LCD_DATA_REG),a`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00			`ld a,%01101001`
hd44780 display debugger 2020-10-18 14:47:46 +02:00			`out (LCD_DATA_REG),a`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00			`ld a,%01100101`
hd44780 display debugger 2020-10-18 14:47:46 +02:00			`out (LCD_DATA_REG),a`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00			`ld a,%01101100`
hd44780 display debugger 2020-10-18 14:47:46 +02:00			`out (LCD_DATA_REG),a`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00			`ld a,%01100101`
hd44780 display debugger 2020-10-18 14:47:46 +02:00			`out (LCD_DATA_REG),a`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00			`ld a,%00100001`
hd44780 display debugger 2020-10-18 14:47:46 +02:00			`out (LCD_DATA_REG),a`
Working debugger, non-working programmer and lcd test procedure with lcd mapped in memory 2020-10-14 19:09:54 +02:00
			`halt`