fun setup
	do
		ds = [d4,d5,d6,d7]

		rs.fsel = new FunctionSelect.outp
		en.fsel = new FunctionSelect.outp
		d4.fsel = new FunctionSelect.outp
		d5.fsel = new FunctionSelect.outp
		d6.fsel = new FunctionSelect.outp
		d7.fsel = new FunctionSelect.outp

		rs.write(false)
		en.write(false)

		write(true, "33".to_hex) # init
		write(true, "32".to_hex) # init
		write(true, "28".to_hex) # 2 lines, 5x7
		write(true, "0C".to_hex) # hide cursor
		write(true, "06".to_hex) # cursor move right
		write(true, "04".to_hex) # turn on display
		write(true, "01".to_hex) # clear display
	end