#!/usr/bin/python
from MCP23S17 import *
from thread import *
from random import randint

class lightChip(MCP23S17):
    def __init__(self, addr,cable_select,clock,miso,mosi):
        MCP23S17.__init__(self,addr, cable_select, clock, miso, mosi, False)
	self.setDirection(0xff,0x00) # configure a as input, b as outputs
        self.sendSPI(0x0C, 0xFF) # pullups aktivieren
	self.sendSPI(0x02, 0xFF) # logik invertieren
	self.state=[0,0,0,0,0,0,0,0]
	start_new_thread(self.shine,())	

    def shine(self):
        self.shining=True
	lastval = 0
	selected = 0
        while self.shining:
            d=0
            for t in range(10,0,-1):
		for chnl in range(0,8):
			if self.state[chnl]>=t:
				d|=1<<chnl
                self.sendSPI(0x13,d)
		time.sleep(0.00001)
	    val = self.readSPI(0x12);
	    if val != lastval:
		if val == 32:
			selected = (selected+1) % 8
			start_new_thread(self.blink,(selected,))
		elif val == 64:
			self.state[selected] = min(self.state[selected]+1,10)
		elif val == 128:
			self.state[selected] = max(self.state[selected]-1,0)
		elif val == 96:
		    for channel in range(0,8):
			self.state[channel]=10
		elif val == 192:
		    for channel in range(0,8):
                        self.state[channel]=0
		elif val == 160:
		    self.halloween()
                else:
                    print val
			
		lastval = val
	self.sendSPI(0x13,0)
	print "stopped"

    def activate(self,num):
	self.sendSPI(0x13,1<<(num-1))

    def halloween(self):
	for c in range(0,50):
            channel = randint(1,8)
	    duration = randint(10,100)/400.0
	    count = randint(1,20)
	    pause = randint(1,120)
	    for i in range(0,count):
	            self.activate(channel)
        	    time.sleep(randint(0,20)/250.0)
		    self.activate(11)
		    time.sleep(randint(10,150)/200.0)
            self.activate(6)
            time.sleep(pause)
	    

    def blink(self,channel):
        old = self.state[channel]
        for c in range(0,2):
	    self.state[channel] = 1
	    time.sleep(0.01)
	    self.state[channel] = 0
	    time.sleep(0.2)
	self.state[channel] = old

if __name__ == "__main__":
    GPIO.cleanup()
    GPIO.setmode(GPIO.BOARD);        
    GPIO.setwarnings(True);

    CS=13
    CLK=11
    MOSI=7
    MISO=5
    
    CS=16
    CLK=12
    MOSI=10
    MISO=8
    print "configuring line pins."
    GPIO.setup(CLK,  GPIO.OUT)
    GPIO.setup(MOSI, GPIO.OUT)
    GPIO.setup(MISO, GPIO.IN)
    GPIO.setup(CS,   GPIO.OUT)
    
    print "initializing line level."
    GPIO.output(CS,  GPIO.HIGH);
    GPIO.output(CLK, GPIO.LOW);
    chip = lightChip(0,CS, CLK, MISO, MOSI)

    t=0.06
    for i in range(0,6):
	for b in range(1,11):
		for c in range(0,8):
			chip.state[c]=b
		time.sleep(t)
	time.sleep(0.5)
	for b in range(10,-1,-1):
		for c in range(0,8):
			chip.state[c]=b
		time.sleep(t)

    t=0.1
    for i in range(0,20):

	chip.state[1]=10
	time.sleep(t)
	chip.state[1]=0

	chip.state[4]=10
	time.sleep(t)
	chip.state[4]=0

	chip.state[2]=10
	time.sleep(t)
	chip.state[2]=0
	
	chip.state[3]=10
	time.sleep(t)
	chip.state[3]=0

	chip.state[6]=10
	time.sleep(t)
	chip.state[6]=0

	chip.state[7]=10
	time.sleep(t)
	chip.state[7]=0

    chip.state[7]=0
    t=0.06
    for i in range(0,100):
	chip.state[1]=10
	chip.state[2]=10
	chip.state[3]=10
	chip.state[4]=10
	chip.state[5]=10
	time.sleep(t)
	chip.state[1]=0
	chip.state[2]=0
	chip.state[3]=0
	chip.state[4]=0
	chip.state[5]=0

	chip.state[0]=10
	chip.state[7]=10
	time.sleep(t)
	chip.state[7]=0
	chip.state[0]=0
    time.sleep(1)
    GPIO.cleanup()