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comparison light8/io.py @ 81:70bd142d72c2

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added a SerialPot io object and made the IO code much more elegant (in io.py)
author drewp
date Fri, 12 Jul 2002 10:42:24 +0000
parents 609cb9ae53b1
children ae2ed47a5321
comparison
equal deleted inserted replaced
80:5f0c6bc8e9de 81:70bd142d72c2
1 from parport import *
2 1
3 class ParportDMX: 2 class BaseIO:
4 def __init__(self, dummy=1, dimmers=68): 3 def __init__(self):
4 self.dummy=1
5 self.__name__ = 'BaseIO'
6 # please override and set __name__ to your class name
7
8 def golive(self):
9 """call this if you want to promote the dummy object becomes a live object"""
10 print "IO: %s is going live" % self.__name__
11 self.dummy=0
12 # you'd override with additional startup stuff here,
13 # perhaps even loading a module and saving it to a class
14 # attr so the subclass-specific functions can use it
15
16 def isdummy(self):
17 return self.dummy
18
19 def __repr__(self):
20 if self.dummy:
21 return "<dummy %s instance>" % self.__name__
22 else:
23 return "<live %s instance>" % self.__name__
24
25 # the derived class will have more methods to do whatever it does,
26 # and they should return dummy values if self.dummy==1.
27
28 class ParportDMX(BaseIO):
29 def __init__(self, dimmers=68):
30 BaseIO.__init__(self)
31 self.__name__='ParportDMX'
5 self.dimmers = dimmers 32 self.dimmers = dimmers
6 self.dummy = dummy 33
7 if not dummy: 34 def golive(self):
8 getparport() 35 BaseIO.golive(self)
36 import parport
37 self.parport = parport
38 self.parport.getparport()
39
9 def sendlevels(self, levels): 40 def sendlevels(self, levels):
10 if self.dummy: return 41 if self.dummy:
42 return
43
11 levels = list(levels) + [0] 44 levels = list(levels) + [0]
12 # if levels[14] > 0: levels[14] = 100 # non-dim 45 # if levels[14] > 0: levels[14] = 100 # non-dim
13 outstart() 46 self.parport.outstart()
14 for p in range(1, self.dimmers + 2): 47 for p in range(1, self.dimmers + 2):
15 outbyte(levels[p-1]*255 / 100) 48 self.parport.outbyte(levels[p-1]*255 / 100)
49
50 class SerialPots(BaseIO):
51 """
52 this is a dummy object (that returns zeros forever) until you call startup()
53 which makes it bind to the port, etc
54
55 """
56 def __init__(self):
57 # no init here- call getport() to actually initialize
58 self.dummy=1
59 self.__name__='SerialPots' # i thought this was automatic!
60
61 def startup(self):
62 """
63 ls -l /dev/i2c-0
64 crw-rw-rw- 1 root root 89, 0 Jul 11 12:27 /dev/i2c-0
65 """
66 import serport
67 self.serport = serport
68
69 self.f = open("/dev/i2c-0","rw")
70
71 # this is for a chip with A0,A1,A2 lines all low:
72 port = 72
73
74 ioctl(self.f,I2C_SLAVE,port)
75 self.dummy=0
76
77 def getlevels(self):
78 if self.dummy:
79 return (0,0,0,0)
80 else:
81 return self.serport.read_all_adc(self.f.fileno())
82
83
84 if __name__=='__main__':
85
86 """ tester program that just dumps levels for a while """
87 from time import sleep
88 from serport import *
89
90 i=0
91 while i<100:
92 sleep(.033)
93 i=i+1
94
95 print read_all_adc(f.fileno())
96