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#!/usr/bin/env python
# $Id: k8055.py,v 1.2 2007/03/15 14:50:55 pjetur Exp $
"""
Python version of K8055 command line program
Copyright (C) 2007 by Pjetur G. Hjaltason
Syntax : python k8055.py [-p:(number)] [-d:(value)] [-a1:(value)] [-a2:(value)]
[-num:(number) [-delay:(number)] [-dbt1:(value)]
[-dbt2:(value)] [-reset1] [-reset2] [-debug] [-h|--help]
-p:(number) Set board number (0/1/2/3)
-d:(value) Set digital output value (bitmask, 8 bits in decimal)
-a1:(value) Set analog output 1 value (0-255)
-a2:(value) Set analog output 2 value (0-255)
-num:(number) Set number of measures (-1 for no read)
-delay:(number) Set delay between two measures (in msec)
-dbt1:(value) Set debounce time for counter 1 (in msec)
-dbt2:(value) Set debounce time for counter 2 (in msec)
-reset1 Reset counter 1
-reset2 Reset counter 2
-debug Activate debug mode
-h or --help Print this text
Example : python k8055.py -p:1 -d:147 -a1:25 -a2:203
NOTE:
Because of the nature of commands sent to the K8055 board, this
program has no way of knowing previous state of the analog or
digial outputs, thus each run of this command will clear the previous
state - and set a new state - of the analog and digital outputs
See header of libk8055.c for more details of K8055 commands
"""
import sys
from time import sleep, time
from pyk8055 import *
def main(argv):
# preset values
p , db = 0,0 # Port, debug
r1, r2 = 0,0 # reset1, reset2
dl = -1 # delay
db1,db2 = -1,-1 # debounce1, debounce2
a1,a2,d = -1,-1,-1 # analog1, analog2, digital
nm = 1 # number of times to read, default once
# not the standard getopts way, but...
for arg in argv:
if arg in ("-h", "--help"):
print __doc__
sys.exit(0)
elif arg[:4] == "-a1:" : a1 = int(arg[4:])
elif arg[:4] == "-a2:" : a2 = int(arg[4:])
elif arg[:5] == "-num:" : nm = int(arg[5:])
elif arg[:3] == "-d:" : d = int(arg[3:])
elif arg[:3] == "-p:" : p = int(arg[3:])
elif arg[:7] == "-delay:" : dl = int(arg[7:])
elif arg[:6] == "-dbt1:" : db1 = int(arg[6:])
elif arg[:6] == "-dbt2:" : db2 = int(arg[6:])
elif arg == "-reset1" : r1 = 1
elif arg == "-reset2" : r2 = 1
elif arg == "-debug" : db = 1
else:
print __doc__
sys.exit(0)
try:
# Open device
if db == 1: k = k8055(p,True) # Debug mode
else: k = k8055(p)
# set requested
if r1 != 0: k.ResetCounter(1)
if r2 != 0: k.ResetCounter(2)
if db1 != -1: k.SetCounterDebounceTime(1, db1)
if db2 != -1: k.SetCounterDebounceTime(2, db2)
# Try to set all digital/analog values at the same time
if (d != -1 and a1 != -1 and a2 != -1) : SetAllValues(d,a1,a2)
elif (d != -1 and a1 != -1 ) : SetAllValues(d,a1,0)
elif (d != -1 and a2 != -1 ) : SetAllValues(d,0,a2)
elif (a1 != -1 and a2 != -1 ) : SetAllValues(0,a1,a2)
# Else only one specified
else:
if d != -1: k.WriteAllDigital(d)
if a1 != -1: k.OutputAnalogChannel(1,a1)
if a2 != -1: k.OutputAnalogChannel(2,a2)
# Now we loop (or not) for the specified number of times
# reading all the input values
# Each read of all values will take about 2-8ms, at least
# on my setup - so no sense in using delay less than 10
if (dl > 0) & (dl < 10): dl = 10
if (nm > 0) & (dl > 0):
tst = tstart = time()
i = 0
while nm > 0:
ds = str(k)
tnow = time()
tms = (tnow - tstart) * 1000.0
delta= dl - (tms - dl*i)
#tst = tnow
print str(int(tms+0.4999))+";"+ds
sleep((delta)/1000.0) # compensate for read time
nm -= 1
i += 1
elif nm > 0:
print "0;"+ str(k)
k.CloseDevice()
except IOError:
print "Could not open the k8055 (port:%s)" % str(p)
main(sys.argv[1:])
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