task_user_wdr.asm

.CSEG
Task_WDR:	tst WDR_ARMED		; checking if WDR armed
	breq WDR_End
	tst WDR_RST			; checking if WDR reset triggered
	brne WDR_Reset
	dec WDR_CNT_LOW		; checking counter
	brne WDR_End
	movi WDR_CNT_LOW, 0xff		; counter compare match, resetting
	ldi GREG, 0x01		; send confirmation to usart
	rcall SendByte
	ldi GREG, 0xCC
	rcall SendByte
	outi PORTC, WDR_PORTC_MASK	; only wdr on PORTC, so this is safe
	SetTimerTask TS_WDR_Release, 0xFF
WDR_End:	SetTimerTask TS_WDR, WDR_TS_DELAY
	ret

WDR_Reset:	movi WDR_CNT_LOW, 0xff
	clr WDR_RST
	ldi GREG, 0x01
	rcall SendByte
	ldi GREG, 0xAA
	rjmp SendByte

WDR_Arm:	ldi GREG, 0x02		; send confirmation to usart
	rcall SendByte
	ldi GREG, 0x06
	rcall SendByte
	mov GREG, UCC1
	rcall SendByte
	tst UCC1			; Arm or Unarm?
	breq WDR_Unarm		
	inc WDR_ARMED		; set ARMED flag
	SetTimerTask TS_WDR, WDR_TS_DELAY	; schedule task
	ret
WDR_Unarm:	clr WDR_ARMED		; clear ARMED flag
	ret

Task_WDR_Release:
	outi PORTC, 0x00		; only wdr on PORTC, so this is safe
	ret