.nolist
.include "m168def.inc"      ; Same family as 328P
.list

;; Interrupt Vector
.org 0x00
        rjmp        init

.org OC1Aaddr
		; Timer/Counter1 Overflow
		rjmp		Timer_OC1A

.org SPIaddr
        rjmp        SPI_Interrupt

.org ADCCaddr
        rjmp        ADC_Interrupt

.org 0x40

;; Syntax
.include "macros.inc"

;; SPI
.include "spi.inc"

;; LCD
.include "led7seg.inc"

;; ADC
.include "adc.inc"

;; Timer
.include "timer.inc"

;; Utils
.include "delay.inc"

;; Count down from 9
; Returns once we've hit zero
Main_Countdown:
        ; init from F
        ldi         r24, LED7_F

_count_loop:
        ; display
        mov         r16, r24
        rcall       LED7_Show

        ; exit if zero
        tst         r24
        breq        _count_end

        ; count down
        dec         r24

        ; wait...
        rcall        Delay_1s

        ; next
        rjmp        _count_loop

_count_end:
        ; done
        ret

;; Blink between dot and empty
Main_Blink:
_blink_loop:
        ; dot
        ldi         r16, LED7_DOT
        rcall       LED7_Show

        ; wait...
        rcall       Delay_1s
        
        ; empty
        ldi         r16, LED7_EMPTY
        rcall       LED7_Show
        
        rcall       Delay_1s
        
        ; loop
        rjmp        _blink_loop
 
;; Chase segments
Main_Spin:
_spin_init:
        ; init from top
        ldi         r24, 0b00000001 

_spin_next:
        ; display
        mov         r16, r24
        mov         r17, r24
        com         r17
        rcall       LED7_ShowRaw

        ; delay
        rcall       ADC_Read8 
        ;mov         r16, r10

        ldi         r17, 64
        mul         r16, r17
        mov         XL, r0
        mov         XH, r1 

        rcall       Timer_Sleep

        ; next segment
        lsl         r24
        
        ; go back to A if we hit G
        sbrc        r24, 6
        rjmp        _spin_init

        rjmp        _spin_next

Main:
init:
	; DEBUG
		sbi			DDRD, PORTD7
		sbi			PORTD, PORTD7

    ; Stack
        ldi         r16, high(RAMEND)
        ldi         r17, low(RAMEND)
        out         SPH, r16
        out         SPL, r17

    ; Enable interrupts
        sei

    ; ADC (slowest to start up)
        rcall       ADC_Init
    
    ; Timer
        rcall       Timer_Init

    ; SPI
        rcall       SPI_Init
    
    ; LCD (requires interrupts, blocks)
        rcall       LED7_Init    
    
    ; Run
        ; spin!
        rcall       Main_Spin
        
        ; count!
        ; rcall       Main_Countdown
        ; rcall       Main_Blink

end:
        rjmp        end