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control.py
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control.py
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#Remote control support
#!/usr/bin/env python3
import RPi.GPIO as GPIO
from config import *
from time import sleep
from time import *
count = 0
CODES = {
0xffa25d: "ON/OFF",
0xff629d: "MODE",
0xffe21d: "MUTE",
0xff22dd: "PLAY/PAUSE",
0xff02fd: "PREVIOUS",
0xffc23d: "NEXT",
0xffe01f: "EQ",
0xffa857: "MINUS",
0xff906f: "PLUS",
0xff6897: "0",
0xff9867: "SHUFFLE",
0xffb04f: "U/SD",
0xff30cf: "1",
0xff18e7: "2",
0xff7a85: "3",
0xff10ef: "4",
0xff38c7: "5",
0xff5aa5: "6",
0xff42bd: "7",
0xff4ab5: "8",
0xff52ad: "9",
}
def setup():
#GPIO.setmode(GPIO.BOARD) # Numbers GPIOs by physical location
GPIO.setup(IR, GPIO.IN, pull_up_down=GPIO.PUD_UP)
def cnt(ev=None):
global count
count += 1
print ('Received infrared. cnt = ', count)
def loop():
GPIO.add_event_detect(IR, GPIO.FALLING, callback=cnt) # wait for falling
while True:
pass # Don't do anything
def binary_aquire(pin, duration):
# aquires data as quickly as possible
t0 = time()
results = []
while (time() - t0) < duration:
results.append(GPIO.input(pin))
return results
def on_ir_receive(pinNo, bouncetime=150):
# when edge detect is called (which requires less CPU than constant
# data acquisition), we acquire data as quickly as possible
data = binary_aquire(pinNo, bouncetime/1000.0)
if len(data) < bouncetime:
return
rate = len(data) / (bouncetime / 1000.0)
pulses = []
i_break = 0
# detect run lengths using the acquisition rate to turn the times in to microseconds
for i in range(1, len(data)):
if (data[i] != data[i-1]) or (i == len(data)-1):
pulses.append((data[i-1], int((i-i_break)/rate*1e6)))
i_break = i
# decode ( < 1 ms "1" pulse is a 1, > 1 ms "1" pulse is a 1, longer than 2 ms pulse is something else)
# does not decode channel, which may be a piece of the information after the long 1 pulse in the middle
outbin = ""
for val, us in pulses:
if val != 1:
continue
if outbin and us > 2000:
break
elif us < 1000:
outbin += "0"
elif 1000 < us < 2000:
outbin += "1"
try:
return int(outbin, 2)
except ValueError:
# probably an empty code
return None
def destroy():
GPIO.cleanup() # Release resource
exit()
if __name__ == '__main__': # Program start from here
setup()
try:
print("Starting IR Listener")
while True:
print("Waiting for signal")
GPIO.wait_for_edge(IR, GPIO.FALLING)
code = on_ir_receive(IR)
if code:
print(str(hex(code)))
else:
print("Invalid code")
except KeyboardInterrupt: # When 'Ctrl+C' is pressed, the child program destroy() will be executed.
destroy()
except RuntimeError:
# this gets thrown when control C gets pressed
# because wait_for_edge doesn't properly pass this on
destroy()
#pass