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node-red/nodes/core/hardware/nrgpio.py

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#!/usr/bin/python
#
# Copyright 2014 IBM Corp.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# Import library functions we need
import RPi.GPIO as GPIO
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import struct
import sys
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import os
import subprocess
bounce = 20 # bounce time in mS to apply
if sys.version_info >= (3,0):
print("Sorry - currently only configured to work with python 2.x")
sys.exit(1)
if len(sys.argv) > 2:
cmd = sys.argv[1].lower()
pin = int(sys.argv[2])
GPIO.setmode(GPIO.BOARD)
GPIO.setwarnings(False)
if cmd == "pwm":
#print "Initialised pin "+str(pin)+" to PWM"
GPIO.setup(pin,GPIO.OUT)
p = GPIO.PWM(pin, 100)
p.start(0)
while True:
try:
data = raw_input()
if 'close' in data:
sys.exit(0)
p.ChangeDutyCycle(float(data))
except (EOFError, SystemExit): # hopefully always caused by us sigint'ing the program
GPIO.cleanup(pin)
sys.exit(0)
except Exception as ex:
print "bad data: "+data
elif cmd == "buzz":
#print "Initialised pin "+str(pin)+" to Buzz"
GPIO.setup(pin,GPIO.OUT)
p = GPIO.PWM(pin, 100)
p.stop()
while True:
try:
data = raw_input()
if 'close' in data:
sys.exit(0)
elif float(data) == 0:
p.stop()
else:
p.start(50)
p.ChangeFrequency(float(data))
except (EOFError, SystemExit): # hopefully always caused by us sigint'ing the program
GPIO.cleanup(pin)
sys.exit(0)
except Exception as ex:
print "bad data: "+data
elif cmd == "out":
#print "Initialised pin "+str(pin)+" to OUT"
GPIO.setup(pin,GPIO.OUT)
if len(sys.argv) == 4:
GPIO.output(pin,int(sys.argv[3]))
while True:
try:
data = raw_input()
if 'close' in data:
sys.exit(0)
data = int(data)
except (EOFError, SystemExit): # hopefully always caused by us sigint'ing the program
GPIO.cleanup(pin)
sys.exit(0)
except:
data = 0
if data != 0:
data = 1
GPIO.output(pin,data)
elif cmd == "in":
#print "Initialised pin "+str(pin)+" to IN"
def handle_callback(chan):
print GPIO.input(chan)
if len(sys.argv) == 4:
if sys.argv[3].lower() == "up":
GPIO.setup(pin,GPIO.IN,GPIO.PUD_UP)
elif sys.argv[3].lower() == "down":
GPIO.setup(pin,GPIO.IN,GPIO.PUD_DOWN)
else:
GPIO.setup(pin,GPIO.IN)
else:
GPIO.setup(pin,GPIO.IN)
print GPIO.input(pin)
GPIO.add_event_detect(pin, GPIO.BOTH, callback=handle_callback, bouncetime=bounce)
while True:
try:
data = raw_input()
if 'close' in data:
sys.exit(0)
except (EOFError, SystemExit): # hopefully always caused by us sigint'ing the program
GPIO.cleanup(pin)
sys.exit(0)
elif cmd == "byte":
#print "Initialised BYTE mode - "+str(pin)+
list = [7,11,13,12,15,16,18,22]
GPIO.setup(list,GPIO.OUT)
while True:
try:
data = raw_input()
if 'close' in data:
sys.exit(0)
data = int(data)
except (EOFError, SystemExit): # hopefully always caused by us sigint'ing the program
GPIO.cleanup()
sys.exit(0)
except:
data = 0
for bit in range(8):
if pin == 1:
mask = 1 << (7 - bit)
else:
mask = 1 << bit
GPIO.output(list[bit], data & mask)
elif cmd == "borg":
#print "Initialised BORG mode - "+str(pin)+
GPIO.setup(11,GPIO.OUT)
GPIO.setup(13,GPIO.OUT)
GPIO.setup(15,GPIO.OUT)
r = GPIO.PWM(11, 100)
g = GPIO.PWM(13, 100)
b = GPIO.PWM(15, 100)
r.start(0)
g.start(0)
b.start(0)
while True:
try:
data = raw_input()
if 'close' in data:
sys.exit(0)
c = data.split(",")
r.ChangeDutyCycle(float(c[0]))
g.ChangeDutyCycle(float(c[1]))
b.ChangeDutyCycle(float(c[2]))
except (EOFError, SystemExit): # hopefully always caused by us sigint'ing the program
GPIO.cleanup()
sys.exit(0)
except:
data = 0
elif cmd == "rev":
print GPIO.RPI_REVISION
elif cmd == "ver":
print GPIO.VERSION
elif cmd == "mouse": # catch mice button events
file = open( "/dev/input/mice", "rb" )
oldbutt = 0
def getMouseEvent():
global oldbutt
global pin
buf = file.read(3)
pin = pin & 0x07
button = ord( buf[0] ) & pin # mask out just the required button(s)
if button != oldbutt: # only send if changed
oldbutt = button
print button
while True:
try:
getMouseEvent()
except:
file.close()
sys.exit(0)
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elif cmd == "kbd": # catch keyboard button events
try:
while not os.path.isdir("/dev/input/by-path"):
time.sleep(10)
infile = subprocess.check_output("ls /dev/input/by-path/ | grep -m 1 'kbd'", shell=True).strip()
infile_path = "/dev/input/by-path/" + infile
EVENT_SIZE = struct.calcsize('llHHI')
file = open(infile_path, "rb")
event = file.read(EVENT_SIZE)
while event:
(tv_sec, tv_usec, type, code, value) = struct.unpack('llHHI', event)
#if type != 0 or code != 0 or value != 0:
if type == 1:
# type,code,value
print("%u,%u" % (code, value))
event = file.read(EVENT_SIZE)
print "0,0"
file.close()
sys.exit(0)
except:
file.close()
sys.exit(0)
elif len(sys.argv) > 1:
cmd = sys.argv[1].lower()
if cmd == "rev":
print GPIO.RPI_REVISION
elif cmd == "ver":
print GPIO.VERSION
else:
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print "Bad parameters - in|out|pwm|buzz|byte|borg|mouse|kbd|ver {pin} {value|up|down}"
print " only ver (gpio version) and rev (board revision) accept no pin parameter."
else:
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print "Bad parameters - in|out|pwm|buzz|byte|borg|mouse|kbd|ver {pin} {value|up|down}"