jeszcze tak apropo avr i osd
inicjalizacja:
.include "m644def.inc"
.def zero = r10
.def one = r11
.def two = r12
;-------------------------------------------------------------------------------;
; Data Segment ;
;-------------------------------------------------------------------------------;
.dseg
.org SRAM_Start
;-------------------------------------------------------------------------------
; Video Engine constants
;
;-------------------------------------------------------------------------------
.equ SCREEN_WIDTH = 40
;-------------------------------------------------------------------------------
; Video Engine variables
;
;-------------------------------------------------------------------------------
Line_Counter: .byte 2
Line_Menu: .byte 2
Line_Status: .byte 2
;-------------------------------------------------------------------------------
; General
Display_Start: .byte 2
Lines: .byte 1
Menu_Buffer: .byte SCREEN_WIDTH*34
Status_Buffer: .byte SCREEN_WIDTH*2
Menu_Item: .byte 1
Menu_Option: .byte 1
;-------------------------------------------------------------------------------;
; Keyboard definitions ;
;-------------------------------------------------------------------------------;
.equ START_Key = PD5
.equ SELECT_Key = PD6
.equ OPTION_Key = PD7
.equ RESET_Key = PC7
;-------------------------------------------------------------------------------;
; party version
.equ QMEG = PC4
.equ MEMORY = PC2
.equ EN_S = PA3
.equ EN_C = PC6
.equ SS_MODE = PA5
.macro enable_covox
sbi PORTC,EN_C
.endmacro
.macro disable_covox
cbi PORTC,EN_C
.endmacro
.macro enable_stereo
sbi PORTA,EN_S
.endmacro
.macro disable_stereo
cbi PORTA,EN_S
.endmacro
.macro set_qmeg
sbi PORTC,QMEG
.endmacro
.macro set_standard
cbi PORTC,QMEG
.endmacro
.macro set_320k
sbi PORTC,MEMORY
.endmacro
.macro set_1mb
cbi PORTC,MEMORY
.endmacro
.macro set_d280
sbi PORTA,SS_MODE
.endmacro
.macro set_d600
cbi PORTA,SS_MODE
.endmacro
;-------------------------------------------------------------------------------;
; Code Segment ;
;-------------------------------------------------------------------------------;
.cseg
.overlap
.org 0
rjmp start
.org INT1Addr
rjmp Video_Engine
.org OC0Aaddr
rjmp Video_Engine
.org SPMRaddr
.macro wait
ldi @0,@1
ll: dec @0
brne ll
.endmacro
.org 0x40
MenuAddress: .dw Menu
FontAddress: .dw Fonts
start: cli ; Disable Interrupts
sbi DDRC,RESET_Key
cbi PORTC,RESET_Key
ldi r16,low(RAMEND-64)
ldi r17,high(RAMEND-64)
out SPL,r16
out SPH,r17 ; Setup Stack Pointer
rcall MCU_Setup ; Setup ports
rcall SPI_Setup ; Setup SPI
rcall INT_Setup ; Setup INT1
ldi zl,low(Text*2)
ldi zh,high(Text*2)
ldi xl,low(Menu_Buffer)
ldi xh,high(Menu_Buffer)
ldi r18,4
l0: ldi r17,SCREEN_WIDTH
l1: lpm r16,z
rcall ATASCII2CHR
adiw zl,1
st x+,r16
dec r17
brne l1
dec r18
brne l0
ldi zl,low(Mode_OSD*2) ;
ldi zh,high(Mode_OSD*2) ;
rcall Init_VideoEngine ; Restart Video Engine in specified mode
enable_covox
;-------------------------------------------------------------------------------
; Initial setup of microcontroller
MCU_Setup: ldi r16,0b11111111
out DDRA,r16 ; set PORT A as output
ldi r16,0b01111111
out DDRC,r16 ; set PORT C as output
ldi r16,0b00000010
out DDRD,r16 ; set PORT D as input
ldi r16,0b00000000
cbi PORTC,PC7
out PORTD,r16
clr r16
mov zero,r16
inc r16
mov one,r16
inc r16
mov two,r16
lds r16,MCUCR
ori r16,1<<JTD
sts MCUCR,r16
sts MCUCR,r16
ret
;-------------------------------------------------------------------------------;
; INT Setup
INT_Setup: ldi r16,0b00001000
sts EICRA,r16
ldi r16,0b00000010
out EIMSK,r16
ret
;-------------------------------------------------------------------------------;
; SPI Setup
SPI_Setup: sts UBRR0H,zero
sts UBRR0L,zero
sbi DDRA, PA0 ; Setting the XCKn port pin as output, enables master mode.
ldi r16,(1<<UMSEL01)|(1<<UMSEL00)|(0<<UCPHA0)|(0<<UCPOL0) ; Set MSPI mode of operation and SPI data mode 0.
sts UCSR0C,r16
ldi r16,(1<<TXEN0) ; Enable transmitter.
sts UCSR0B,r16
sts UBRR0H,zero ; Set baud rate.
sts UBRR0L,one ; IMPORTANT: The Baud Rate must be set after the transmitter is enabled!
ret
;-------------------------------------------------------------------------------
; Display Text
; R17 font raster line number
;-------------------------------------------------------------------------------
;-------------------------------------------------------------------------------
; ATASCII to charset code
; fonts i use are from atari 8bit computer, it uses special mapping for fonts
; since there is only 6 bits for all letters and digits, thus some reorganisation
; is required.
; i suppose one could convert data to standard ascii table before compilation,
; but then diffrent fonts had to be converted pririor to compilation
; this way it was simplier
; R16 char code
ATASCII2CHR:
cpi r16,32
brlo ATASCII2CHR_p64
cpi r16,96
brlo ATASCII2CHR_m32
ret
ATASCII2CHR_p64:
subi r16,-64
ret
ATASCII2CHR_m32:
subi r16,32
ret
;-------------------------------------------------------------------------------;
; Libraries ;
;-------------------------------------------------------------------------------;
.include "video engine.asm"
.include "video modes.asm"
;---------------------------------------------------------
; 0000000001111111111222222222233333333334;
; 1234567890123456789012345678901234567890;
Text: .db " OSD Extension Atari configuration tool "
.db " Visit http://spiflash.org/atari/osd/ "
.db "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" ; "
.db " &2008 Candle'O'Sin"
.db " Status: "
.db " test"
;---------------------------------------------------------
video_engine:
;-------------------------------------------------------------------------------
; Video Engine interrupt handler
Video_Engine:
cli
push r16
in r16,SREG
push r16
push r17
push r18
push r19
push r20
push xh
push xl
push zh
push zl
wait r16,85
lds r16,Line_Counter
lds r17,Line_Counter+1
add r16,one
adc r17,zero
sts Line_Counter,r16
sts Line_Counter+1,r17
lds r2,Line_Menu
lds r3,Line_Menu+1
cp r16,r2
cpc r17,r3
brlo Video_Engine_End2
lds r2,Line_Status
lds r3,Line_Status+1
cp r16,r2
cpc r17,r3
brsh Video_Engine_Sync
;--------------------------------------------------------------------
; Horizontal Line starts here
lds r2,Line_Menu
lds r3,Line_Menu+1
sub r16,r2
sbc r17,r3
ldi xl,low(Menu_Buffer)
ldi xh,high(Menu_Buffer)
sts Display_Start,xl
sts Display_Start+1,xh
ldi xl,30
sts Lines,xl
rcall Horizontal_Line
rjmp Video_Engine_End2
Video_Engine_Vertical_Blank:
sts Line_Counter,zero
sts Line_Counter+1,zero
rjmp Video_Engine_End2
Video_Engine_Sync:
sbis PIND,3
rjmp Video_Engine_Sync1
rjmp Video_Engine_End2
Video_Engine_Sync1:
; wait r18,4
sbis PIND,3
rjmp Video_Engine_Vertical_Blank
Video_Engine_End2:
pop zl
pop zh
pop xl
pop xh
pop r20
pop r19
pop r18
pop r17
pop r16
out SREG,r16
pop r16
sei
reti
;-------------------------------------------------------------------------------
; Set Video Mode
; Z Offset to video mode definition
Init_VideoEngine:
cli
ldi r16,6
ldi xl,low(Line_Counter)
ldi xh,high(Line_Counter)
Init_VideoEngine_l1:
lpm r17,z
adiw zl,1
st x+,r17
dec r16
brne Init_VideoEngine_l1
lpm r16,z
ldi r17,0b00000000
sts EICRA,r17
ldi r17,0b00000010
out EIMSK,r17
sei
ret
;-------------------------------------------------------------------------------
; Horizontal Line
; R17:R16 Line number
Horizontal_Line:
mov r18,r16
lds xl,Display_Start
lds xh,Display_Start+1
ldi zl,low(Fonts*2)
ldi zh,high(Fonts*2)
movw r3:r2,zh:zl
lsr r17
ror r16
lsr r17
ror r16
lsr r17
ror r16
lds r17,Lines
cp r16,r17
brlo Display_Text_NoWarp
Display_Text_Warp:
cbi PORTA,0
ret
Display_Text_NoWarp:
ldi r20,SCREEN_WIDTH
mul r16,r20
add xl,r0
adc xh,r1
andi r18,7
ldi r19,8
ld r16,x+
add r2,r16
ld r16,x+
adc r3,r16
sbi PORTA,0
Display_Text_l1:
ld r16,x+ ;2
mul r16,r19 ;4
movw zh:zl,r3:r2 ;5
add zl,r0 ;6
adc zh,r1 ;7
add zl,r18 ;8
lpm r16,z ;11
dec r20 ;12
sts UDR0,r16 ;14
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
nop
brne Display_Text_l1 ;16
wait r16,6
cbi PORTA,0
ret
;-------------------------------------------------------------------------------
; General purpose delay loop
; R16 clocks*3+6 to wait
Delay: dec r16
brne Delay
ret
;-------------------------------------------------------------------------------
video_modes:
;-------------------------------------------------------------------------------;
; Video Mode definitions ;
;-------------------------------------------------------------------------------;
;-------------------------------------------------------------------------------
;Copper List for OSD
Mode_OSD: .dw 0 ; Line_Counter
.dw 40 ; Line_Menu
.dw 320 ; Line_Status
;-------------------------------------------------------------------------------
myslalem ze poszlo sie kochac, ale jednak jest na dysku