#! /usr/bin/env python

from serial import serialposix as ser
import time
import math


serport = ser.Serial ( port='/dev/ttyACM0', baudrate=115200 )
time.sleep ( 1 ) # wait for the Arduino bootloader to quit

pix_buffer = [0. for i in range ( 64 )]
def linear ( val ):	return max ( 0, min ( 127, int ( 127 * val**2 ) ) )
def picfunc ( pix, t ):
	pix_buffer[pix] += ( 0.6 * ( 1 & ( int ( time.time ( ) ) >> (63 - pix) ) ) - pix_buffer[pix] ) / 20
	return linear ( pix_buffer[pix] )

t = 0.0
try:
	while True:
		time.sleep ( 0.01 )
		t += 0.01
		serport.write ( chr ( 255 ) + ''.join ( map ( chr, [picfunc ( x, t ) for x in range ( 64 )] ) ) )
except KeyboardInterrupt:
	serport.write ( chr ( 255 ) + ''.join ( map ( chr, [0 for x in range ( 64 )] ) ) )
	serport.close ( )