; main file of led_plex project
;
; schematics: http://hackdaworld.org/download/led_plex/led_plex.png
;
; author: hackbard@hackdaworld.org
;

; device specific definition file
.include "../include/tn2313def.inc"

; defines
.def	tmp1		= r16
.def	tmp2		= r17
.def	uart_rxtx	= r18
.def	hc595_sink	= r19
.def	hc595_source	= r20

;
; interrupts
;

; RESET
rjmp INIT

; INT0
reti

; INT1
reti

; T1 CAPT1
reti

; T1 COMP A
reti

; T1 OVF1
rjmp T1_OVF

; T0 OVF0
rjmp T0_OVF

; UART RX
rjmp UART_RECEIVE

; UART UDRE
reti

; UART TX
reti

; ANA COMP
reti

; PCINT
reti

; T1 COMP B
reti

; T0 COMP A
reti

; T0 COMP B
reti

; USI START
reti

; USI OVF
reti

; EE READY
reti

; WDT OVF
reti

;
; init and main code
;

RESET:
INIT:

	; gio port init
	rcall PORT_INIT

	; timer0 init
	rcall TIMER0_INIT

	; timer0 interrupt enable
	rcall TIMER0_INT_INIT

	; uart init
	rcall UART_INIT

	; uart interrupt enable
	rcall UART_INT_RX_INIT

	; set stackpointer
	ldi tmp1,low(RAMEND)
	out SPL,tmp1

	; global interrupt enable
	sei 

	; signal ready output
	ldi uart_rxtx,0x68
	rcall UART_TX

	; led init
	ldi hc595_sink,0xff
	ldi hc595_source,0x01
	rcall SET_HC595

MAIN:

	; loop forever
	rjmp MAIN


; include subroutines
.include "port.asm"
.include "timer.asm"
.include "uart.asm"


;
; interrupt routines
;

T1_OVF:
	reti

T0_OVF:

	; debug output
	cbi PORTD,3
	
	; shift source
	rol hc595_source

	; update sink

	; set hc595
	rcall SET_HC595

	; debug output
	sbi PORTD,3
	
	reti

UART_RECEIVE:
	reti