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

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2019-05-20 20:35:05 +02:00
# Import library functions we need
import RPi.GPIO as GPIO
import struct
import sys
import os
import subprocess
from time import sleep
try:
raw_input # Python 2
except NameError:
raw_input = input # Python 3
bounce = 25
if len(sys.argv) > 2:
cmd = sys.argv[1].lower()
pin = int(sys.argv[2])
GPIO.setmode(GPIO.BCM)
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GPIO.setwarnings(False)
if cmd == "pwm":
#print("Initialised pin "+str(pin)+" to PWM")
try:
freq = int(sys.argv[3])
except:
freq = 100
GPIO.setup(pin,GPIO.OUT)
p = GPIO.PWM(pin, freq)
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:
if len(sys.argv) == 4:
data = int(sys.argv[3])
else:
data = 0
if data != 0:
data = 1
GPIO.output(pin,data)
elif cmd == "in":
#print("Initialised pin "+str(pin)+" to IN")
bounce = float(sys.argv[4])
def handle_callback(chan):
if bounce > 0:
sleep(bounce/1000.0)
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print(GPIO.input(chan))
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)
if bounce > 0:
GPIO.add_event_detect(pin, GPIO.BOTH, callback=handle_callback, bouncetime=int(bounce))
else :
GPIO.add_event_detect(pin, GPIO.BOTH, callback=handle_callback)
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sleep(0.1)
print(GPIO.input(pin))
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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 == "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)
elif cmd == "kbd": # catch keyboard button events
try:
while not os.path.isdir("/dev/input/by-path"):
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)
elif cmd == "info":
print(GPIO.RPI_INFO)
else:
print("Bad parameters - in|out|pwm|buzz|byte|borg|mouse|kbd|ver|info {pin} {value|up|down}")
print(" only ver (gpio version) and info (board information) accept no pin parameter.")
else:
print("Bad parameters - in|out|pwm|buzz|byte|borg|mouse|kbd|ver|info {pin} {value|up|down}")