removed old asm file

master
Ondřej Hruška 8 years ago
parent 03658ad213
commit ee846562bb
  1. 351
      projects/lcdsnake/lcd_default.asm

@ -1,351 +0,0 @@
; Zapojeni (Připojen DMC-50399 v 4-bitovem modu):
; +------u------+
; Vcc -> reset --+ /RST Vcc +-- napajeni +5V
; --+ PD0 PB7 +-- RS (0=instr W, BF+addr R; 1=data W/R)
; --+ PD1 PB6 +-- R/W (1=read,0=write)
; --+ PA1 PB5 +-- E (clock, active falling edge)
; --+ PA0 PB4 +--
; --+ PD2 PB3 +-- DATA 7
; --+ PD3 PB2 +-- DATA 6
; --+ PD4 PB1 +-- DATA 5
; --+ PD5 PB0 +-- DATA 4
; GND --+ GND PD6 +--
; +-------------+
;DMC-50399:
; 1 - GND
; 2 - +5V
; 3 - 0V (lcd driver)
; 4 - RS
; 5 - R/W
; 6 - E
; 7 - DATA 0
; 8 - DATA 1
;...
;14 - DATA 7
.device attiny2313
;běží na 4MHz, ckdiv8=1 (vypnuto)
;250x16=1ms=1000us
;LFUSE: 0xE2 -U lfuse:w:0xE2:m
;HFUSE: 0xDF -U hfuse:w:0xDF:m
;K O N S T A N T Y + P R E Z D I V K Y P O R T U A P I N U
.equ LCDPORT = PORTB
.equ LCDPIN = PINB
.equ LCDDDR = DDRB
.equ RS = 7
.equ RW = 6
.equ E = 5
.equ LCD_CLEAR = 0b00000001
.equ LCD_HOME = 0b00000010
.equ LCD_MODE_INC_NOSHIFT = 0b00000110
.equ LCD_MODE_INC_SHIFT = 0b00000111
.equ LCD_MODE_DEC_NOSHIFT = 0b00000100
.equ LCD_MODE_DEC_SHIFT = 0b00000101
.equ LCD_DISPLAY_DISABLED = 0b00001000
.equ LCD_DISPLAY_NOCURSOR = 0b00001100
.equ LCD_DISPLAY_CURSOR = 0b00001110
.equ LCD_DISPLAY_ALTER = 0b00001101
.equ LCD_DISPLAY_CURSOR_ALTER = 0b00001111
.equ LCD_CURSOR_LEFT = 0b00010000
.equ LCD_CURSOR_RIGHT = 0b00010100
.equ LCD_SHIFT_LEFT = 0b00011000
.equ LCD_SHIFT_RIGHT = 0b00011100
;5x7 font, 1-line
.equ LCD_MODE_4BIT_1LINE = 0b00100000
;.equ LCD_MODE_8BIT_1LINE = 0b00110000
;5x7 font, 2-line
.equ LCD_MODE_4BIT_2LINE = 0b00101000
;.equ LCD_MODE_8BIT_2LINE = 0b00111000
.equ ROW1_ADDR = 0x00
.equ ROW2_ADDR = 0x40
.equ ROW3_ADDR = 0x14
.equ ROW4_ADDR = 0x54
;aliases
.def ZH = r31
.def ZL = r30
.def YH = r29
.def YL = r28
.def XH = r27
.def XL = r26
; Z A C A T E K P R O G R A M U
;vektory preruseni
.org 0x0000 ;RESET
rjmp RESET ;skok na start po resetu
.org 0x0013
;nastaveni po resetu
.DB "HD44780 INTERFACE" ;(nazev programu)
RESET:
ldi r16,low(RAMEND) ;nastavi stack pointer
out SPL,r16
cli ;zakazat vsechna preruseni
; Nastaveni portu
;PORTB = LCDPORT
ldi r16,0b11111111 ;smer portu B
out LCDDDR,r16
ldi r16,0b00000000 ;vypnout B
out LCDPORT,r16
sei ;Global Interrupt Enable
; == display init ==
rcall LCD_INIT
ldi r17,LCD_MODE_INC_NOSHIFT
rcall TX_INSTR
ldi r17,LCD_DISPLAY_NOCURSOR
rcall TX_INSTR
; == load user-defined characters to CGRAM == (default, array label named MYCHARS, end-mark=0xFE)
ldi r17,0
rcall CGRAM_SET_ADDR
ldi ZH,high(MYCHARS*2)
ldi ZL,low(MYCHARS*2)
CGRAM_loop:
lpm r17,Z+
cpi r17,0xFE
breq CGRAM_loop_end
rcall TX_DATA
rjmp CGRAM_loop
CGRAM_loop_end:
; == pgm body ==
;load text to DDRAM
ldi r17,ROW1_ADDR
rcall DDRAM_SET_ADDR
ldi ZH,high(MYTEXT1*2)
ldi ZL,low(MYTEXT1*2)
DDRAM_loop:
lpm r17,Z+
cpi r17,0xFE
breq DDRAM_loop_end
rcall TX_DATA
rjmp DDRAM_loop
DDRAM_loop_end:
;load text to DDRAM
ldi r17,ROW2_ADDR
rcall DDRAM_SET_ADDR
ldi ZH,high(MYTEXT2*2)
ldi ZL,low(MYTEXT2*2)
DDRAM2_loop:
lpm r17,Z+
cpi r17,0xFE
breq DDRAM2_loop_end
rcall TX_DATA
rjmp DDRAM2_loop
DDRAM2_loop_end:
;direct write to X,Y - example
ldi r16,3 ;Y, zacina 0 a roste smerem dolu
ldi r17,5 ;X, zacina nulou a roste smerem doprava
rcall LCD_CURSOR_XY
ldi r17,"%"
rcall TX_DATA
ldi r17,"%"
rcall TX_DATA
ldi r17,"%"
rcall TX_DATA
;infinite loop
loop: rjmp loop
MYTEXT1:
.DB 0,0,0," POKUSNY TEXT ",0,0,0,0xFE
MYTEXT2:
.DB "Opravdu pekny text!",0xFE
; == USER-DEFINED CHARS ==
MYCHARS:
; 5x8, first 3 bits are not used
;end of mychars
.DB 0xe,0x1f,0x15,0x1f,0x1f,0x1f,0x15 ;smajlik
;konec
.DB 0xFE
;r16=Y
;r17=X
LCD_CURSOR_XY:
cpi r16,0
brne test1
fail: ldi r16,ROW1_ADDR
rjmp addrdone
test1:
cpi r16,1
brne test2
ldi r16,ROW2_ADDR
rjmp addrdone
test2:
cpi r16,2
brne test3
ldi r16,ROW3_ADDR
rjmp addrdone
test3:
cpi r16,3
brne fail
ldi r16,ROW4_ADDR
addrdone:
add r17,r16
rcall DDRAM_SET_ADDR
ret
;r16=počet ms (cca)
delay:
push r17 ;2
push r18 ;2
d1:
ldi r17,250 ;1
d2:
ldi r18,14 ;1
d3:
dec r18 ;1
nop
brne d3 ;2 (1
dec r17 ; +1)
brne d2 ;2 (1
dec r16 ; +1)
brne d1 ;2 (1)
pop r18 ;2
pop r17 ;2
ret
LCD_INIT:
ldi r16,16
rcall delay
ldi r16,0b00000010 ;4bit
out PORTB,r16
rcall LCD_CLK
ldi r16,5
rcall delay
ldi r17,LCD_MODE_4BIT_2LINE ;set 4-bit mode
rcall TX_INSTR
ret
;r17
TX_INSTR:
swap r17 ;send high nibble
mov r16,r17
andi r16,0b00001111
out LCDPORT,r16
rcall LCD_CLK
swap r17 ;send low nibble
mov r16,r17
andi r16,0b00001111
out LCDPORT,r16
rcall LCD_CLK
ret
;r17
TX_DATA:
swap r17 ;send high nibble
mov r16,r17
andi r16,0b00001111
sbr r16,(1<<RS)
out LCDPORT,r16
rcall LCD_CLK
swap r17 ;send low nibble
mov r16,r17
andi r16,0b00001111
sbr r16,(1<<RS)
out LCDPORT,r16
rcall LCD_CLK
ret
;r17 disabled to reduce code size
;RX_DATA:
; ;input
; ldi r16,0b11110000 ;LCDPORT dirrection (RS RW E n.c.) output, (D7 D6 D5 D4) input
; out LCDDDR,r16
; ldi r16,0b00001111 ;pullups to data pins enabled
; out LCDPORT,r16
;
; clr r17
; ldi r16,(1<<RW)|(1<<RS)
; out LCDPORT,r16 ;set LCD to read mode, for data
;
; rcall LCD_CLK ;receive high nibble
; in r16,LCDPIN
; andi r16,0b00001111
; or r17,r16
; swap r17 ;store high nibble
;
; rcall LCD_CLK ;receive low nibble
; in r16,LCDPIN
; andi r16,0b00001111
; or r17,r16 ;store low nibble
;
; ;output
; ldi r16,0b11111111 ;LCDPORT as output (RS RW E n.c. D7 D6 D5 D4)
; out LCDDDR,r16
; ldi r16,0b00000000 ;LCDPORT off
; out LCDPORT,r16
;
; ;r17=received value (D7 D6 D5 D4 D3 D2 D1 D0)
; ret
LCD_CLK:
sbi LCDPORT,E ;EXECUTE on
nop
nop
nop
cbi LCDPORT,E ;EXECUTE off
ldi r16,150 ;pause: 100 for 4MHZ
clkw:
dec r16
brne clkw
ret
;r17
;7 bitu (1.radek zacina 00,druhej 40)
DDRAM_SET_ADDR:
clr r16
sbr r16,0b10000000
or r17,r16
rcall TX_INSTR
ret
;r17
;6 bitu (5,4,3 = znak, 2,1,0 = radek - shora)
CGRAM_SET_ADDR:
clr r16
sbr r16,0b01000000
or r17,r16
rcall TX_INSTR
ret
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