; main file of led_plex project
;
+; schematics: http://hackdaworld.org/download/led_plex/led_plex.png
+;
; author: hackbard@hackdaworld.org
;
.include "../include/tn2313def.inc"
; defines
+.def zero = r1
+.def one = r2
.def tmp1 = r16
.def tmp2 = r17
.def uart_rxtx = r18
+.def hc595_sink = r19
+.def hc595_source = r20
+.def column = r21
+.def count = r22
;
; interrupts
rjmp T0_OVF
; UART RX
-rjmp UART_RX
+rjmp UART_RECEIVE
; UART UDRE
reti
; WDT OVF
reti
-
-; include control defines
-.include "ctrl.def"
+;
+; init and main code
+;
RESET:
INIT:
; gio port init
- rcall GIO_PORT_INIT
+ rcall PORT_INIT
+
+ ; timer0 init
+ rcall TIMER0_INIT
+
+ ; timer0 interrupt enable
+ rcall TIMER0_INT_INIT
+
+ ; timer1 init
+ rcall TIMER1_INIT
- ; timer init
- rcall TIMER_INIT
+ ; timer1 interrupt enable
+ rcall TIMER1_INT_INIT
; uart init
rcall UART_INIT
; uart interrupt enable
rcall UART_INT_RX_INIT
+ ; zero and one initialization
+ ldi tmp1,0
+ mov zero,tmp1
+ ldi tmp1,1
+ mov one,tmp1
+
; set stackpointer
ldi tmp1,low(RAMEND)
out SPL,tmp1
- ; global interrupt enable
- ;sei
+ ; framebuffer init: Z :)
+ ldi ZL,low(FB_C)
+ ldi ZH,high(FB_C)
+ ldi tmp1,0xff
+ st Z+,tmp1
+ ldi tmp1,0xc3
+ st Z+,tmp1
+ ldi tmp1,0xa5
+ st Z+,tmp1
+ ldi tmp1,0x99
+ st Z+,tmp1
+ ldi tmp1,0x99
+ st Z+,tmp1
+ ldi tmp1,0xa5
+ st Z+,tmp1
+ ldi tmp1,0xc3
+ st Z+,tmp1
+ ldi tmp1,0xff
+ st Z,tmp1
+
+ ; led init
+ ldi hc595_sink,0x00
+ ldi hc595_source,0x01
+ ldi column,0
+ rcall SET_HC595
+
+ ; more init
+ ldi count,0x21
; signal ready output
- ldi uart_rxtx,0x23
+ ldi uart_rxtx,0x68
rcall UART_TX
+ ; global interrupt enable
+ sei
+
MAIN:
; loop forever
;
T1_OVF:
+
+ ;
+ ; write font into framebuffer sram
+ ;
+
+.ifdef DEBUG_PORTS
+ ldi uart_rxtx,0x21
+ rcall UART_TX
+.endif
+ ; calculate address
+
+ ; font base address
+ ldi ZL,low(FONTS*2)
+ ldi ZH,high(FONTS*2)
+.ifdef DEBUG_PORTS
+ mov uart_rxtx,ZH
+ rcall UART_TX
+ mov uart_rxtx,ZL
+ rcall UART_TX
+ ldi uart_rxtx,0x2d
+ rcall UART_TX
+.endif
+
+ ; framebuffer base address
+ ldi YL,low(FB_C)
+ ldi YH,high(FB_C)
+.ifdef DEBUG_PORTS
+ mov uart_rxtx,YH
+ rcall UART_TX
+ mov uart_rxtx,YL
+ rcall UART_TX
+ ldi uart_rxtx,0x2d
+ rcall UART_TX
+.endif
+
+ ; font offset
+ mov XL,count
+ ldi XH,0
+ ; times 8 == 3 left shifts
+ rol XL
+ rol XH
+ rol XL
+ rol XH
+ rol XL
+ rol XH
+.ifdef DEBUG_PORTS
+ mov uart_rxtx,XH
+ rcall UART_TX
+ mov uart_rxtx,XL
+ rcall UART_TX
+ ldi uart_rxtx,0x2d
+ rcall UART_TX
+.endif
+
+ ; final font address
+ add ZL,XL
+ adc ZH,zero
+ add ZH,XH
+.ifdef DEBUG_PORTS
+ mov uart_rxtx,ZH
+ rcall UART_TX
+ mov uart_rxtx,ZL
+ rcall UART_TX
+ ldi uart_rxtx,0x2d
+ rcall UART_TX
+ mov uart_rxtx,count
+ rcall UART_TX
+.endif
+
+ ; move font data into framebuffer
+ lpm tmp1,Z+
+ st Y+,tmp1
+ lpm tmp1,Z+
+ st Y+,tmp1
+ lpm tmp1,Z+
+ st Y+,tmp1
+ lpm tmp1,Z+
+ st Y+,tmp1
+ lpm tmp1,Z+
+ st Y+,tmp1
+ lpm tmp1,Z+
+ st Y+,tmp1
+ lpm tmp1,Z+
+ st Y+,tmp1
+ lpm tmp1,Z
+ st Y,tmp1
+
+ ; TESTING
+ ; increment test counter
+ inc count
+ cpi count,0x80
+ brne EXIT_T1_OVF
+ ldi count,0x21
+
+EXIT_T1_OVF:
+
reti
T0_OVF:
+
+ ; debug output
+ cbi PORTD,3
+
+ ; shift source
+ rol hc595_source
+ inc column
+ cpi column,8
+ brne SINK_UPDATE
+ ldi column,0
+ ldi hc595_source,1
+
+ ; update sink
+SINK_UPDATE:
+
+ ldi ZL,low(FB_C)
+ ldi ZH,high(FB_C)
+ add ZL,column
+ adc ZH,zero
+ ld hc595_sink,Z
+
+.ifdef DEBUG_PORTS
+ ldi uart_rxtx,0x2d
+ rcall UART_TX
+ ldi uart_rxtx,0x3e
+ rcall UART_TX
+ ldi uart_rxtx,0x30
+ add uart_rxtx,column
+ rcall UART_TX
+ ldi uart_rxtx,0x3a
+ rcall UART_TX
+ ldi uart_rxtx,0x20
+ rcall UART_TX
+.endif
+
+ ; set hc595
+ rcall SET_HC595
+
+.ifdef DEBUG_PORTS
+ ldi uart_rxtx,0x0a
+ rcall UART_TX
+ ldi uart_rxtx,0x0d
+ rcall UART_TX
+.endif
+
+ ; debug output
+ sbi PORTD,3
+
reti
-UART_RX:
+UART_RECEIVE:
reti
+; include fonts
+FONTS:
+.include "fonts.asm"
+
+;
+; sram
+;
+
+.dseg
+
+; current framebuffer content
+FB_C: .byte 8
+
+
projects / my-code / atmel.git / blobdiff