-- écrit par Lukian Leizour le 12/10/2024

function print_pos()
	enc = encoder.attach(pio.GPIO18, pio.GPIO19, pio.GPIO21, function(dir, counter, button)
		print(dir, counter, button)
	end)
end

function scroll()
	neo = neopixel.attach(neopixel.WS2812B, pio.GPIO22, 8)
	pos = 0

	enc = encoder.attach(pio.GPIO18, pio.GPIO19, pio.GPIO21, function(dir, counter, button)
		neo:setPixel(pos, 0, 0, 0)
		if (dir == 1) then pos = (pos + 1) % 8
		elseif (dir == -1) then pos = (pos - 1) % 8 end
		r, g, b = wheelRGB(math.random(0, 255))
		neo:setPixel(pos, r//10, g//10, b//10)
		neo:update()
	end)
end

function led_on_off()
	on = false
	enc = encoder.attach(pio.GPIO18, pio.GPIO19, pio.GPIO21, function(dir, counter, button)
		if button == 1 then on = not on end
		if on then pinon(pio.GPIO2) else pinoff(pio.GPIO2) end
	end)
end

function led_speed()
	device = pwm.attach(pio.GPIO2, 1, 0.5)
	device:start()
	pos = 1

	enc = encoder.attach(pio.GPIO18, pio.GPIO19, pio.GPIO21, function(dir, counter, button)
		if (dir == 1) then pos = pos + 1
		elseif (dir == -1 and pos > 1) then pos = (pos - 1) end
		device:setfreq(pos)
	end)
end