--- /dev/null
+# This code is copyright ...... under the GPL v2.
+# This code is derived from scratch_gpio_handler by Simon Walters, which
+# is derived from scratch_handler by Thomas Preston
+# Version 0.1: It's kind of working.
+
+from array import *
+import threading
+import socket
+import time
+import sys
+import struct
+import serial
+import io
+import datetime as dt
+import logging
+
+PORT = 42001
+DEFAULT_HOST = '127.0.0.1'
+BUFFER_SIZE = 240 #used to be 100
+SOCKET_TIMEOUT = 1
+DEVICES = ['/dev/ttyACM0', '/dev/ttyACM1','/dev/ttyACM3']
+#DEVICES = ['/dev/ttyACM0','/dev/ttyACM1']
+#DRUM_DEVICE = '/dev/ttyACM0'
+#GUITAR_DEVICE = '/dev/ttyUSB1'
+#MARACAS_DEVICE = '/dev/ttyACM1'
+ARDUINO_BAUD_RATE = 57600
+
+BROADCAST_NAMES = {'guitar': 'guitar',
+ 'drum': {0: 'cymbal',
+ 1: 'hihat',
+ 2: 'slowdrum',
+ 3: 'snare',
+ 4: 'tomtom'},
+ 'maracas': 'maracas'}
+
+SENSOR_NAMES = {'guitar': 'guitar_pitch'}
+
+logging.basicConfig(level = logging.INFO)
+#logging.basicConfig(level = logging.DEBUG)
+
+class MyError(Exception):
+ def __init__(self, value):
+ self.value = value
+
+ def __str__(self):
+ return repr(self.value)
+
+class ScratchSender(threading.Thread):
+ def __init__(self, socket):
+ threading.Thread.__init__(self)
+ self.scratch_socket = socket
+ self._stop = threading.Event()
+
+ def join(self,timeout=None):
+ self._stop.set()
+ threading.Thread.join(self, timeout)
+
+ def stopped(self):
+ return self._stop.isSet()
+
+ def run(self):
+ while not self.stopped():
+ time.sleep(0.01) # be kind to cpu - not certain why :)
+
+ def send_scratch_command(self, cmd):
+ n = len(cmd)
+ a = array('c')
+ a.append(chr((n >> 24) & 0xFF))
+ a.append(chr((n >> 16) & 0xFF))
+ a.append(chr((n >> 8) & 0xFF))
+ a.append(chr(n & 0xFF))
+ self.scratch_socket.send(a.tostring() + cmd)
+
+
+class ArduinoListener(threading.Thread):
+ def __init__(self, device, speed, sender, instruments, values):
+ threading.Thread.__init__(self)
+ self.arduino_device = serial.Serial(device, speed, timeout=0.5)
+ self._stop = threading.Event()
+ self.scratch_sender = sender
+ self.instruments = instruments
+ self.values = values
+ logging.info("Started listener on port %s" % device)
+
+ def join(self,timeout=None):
+ self._stop.set()
+ threading.Thread.join(self, timeout)
+
+ def stopped(self):
+ return self._stop.isSet()
+
+ def run(self):
+ self.arduino_device.readline() # discard the first (partial) line
+ while not self.stopped():
+ logging.debug('Thread waiting for a signal')
+ try:
+ device_line = self.arduino_device.readline()
+ if device_line :
+ instrument, instrument_value_string = device_line.rstrip().split(',', 1)
+ instrument_value = int(instrument_value_string)
+ logging.info('Instrument: %s, Value: %d' % (instrument, instrument_value))
+ if instrument in self.values:
+ try:
+ logging.info("sensor-update %s %d" % (self.values[instrument], (instrument_value * 100) / 1024))
+ self.scratch_sender.send_scratch_command("sensor-update %s %d" % (self.values[instrument], (instrument_value * 100) / 1024))
+ except KeyError:
+ # Do nothing
+ pass
+ if instrument in self.instruments:
+ if isinstance(self.instruments[instrument], dict):
+ broadcast = self.instruments[instrument][instrument_value]
+ else:
+ broadcast = self.instruments[instrument]
+ try:
+ logging.info("broadcast %s" % broadcast)
+ self.scratch_sender.send_scratch_command('broadcast %s' % broadcast)
+ except KeyError:
+ # Do nothing
+ pass
+
+ except serial.SerialException:
+ logging.error('Serial exception')
+ logging.debug('Thread run() exiting')
+
+
+def create_socket(host, port):
+ while True:
+ try:
+ logging.info('Connecting to Scratch')
+ scratch_sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+ scratch_sock.connect((host, port))
+ break
+ except socket.error:
+ logging.warning("There was an error connecting to Scratch!")
+ logging.warning("I couldn't find a Mesh session at host: %s, port: %s" % (host, port))
+ time.sleep(3)
+ return scratch_sock
+
+def cleanup_threads(threads):
+ logging.debug("Stopping %d threads" % len(threads))
+ for thread in threads:
+ thread.join()
+ logging.debug("Threads joined")
+
+if __name__ == '__main__':
+ if len(sys.argv) > 1:
+ host = sys.argv[1]
+ else:
+ host = DEFAULT_HOST
+
+cycle_trace = 'start'
+while True:
+ if (cycle_trace == 'disconnected'):
+ logging.info("Scratch disconnected")
+ cleanup_threads(listeners + sender)
+ time.sleep(1)
+ cycle_trace = 'start'
+
+ if (cycle_trace == 'start'):
+ # open the socket
+ logging.info('Connecting to Scratch...')
+ the_socket = create_socket(host, PORT)
+ logging.info('Connected to Scratch')
+ the_socket.settimeout(SOCKET_TIMEOUT)
+ sender = ScratchSender(the_socket)
+ listeners = [ArduinoListener(device, ARDUINO_BAUD_RATE, sender, BROADCAST_NAMES, SENSOR_NAMES) for device in DEVICES]
+ cycle_trace = 'running'
+ logging.info("Listeners running....")
+ sender.start()
+ for listener in listeners:
+ listener.start()
+
+ # wait for ctrl+c
+ try:
+ #just pause
+ time.sleep(0.1)
+ except KeyboardInterrupt:
+ logging.warning("Interrrupted")
+ cleanup_threads(listeners + [sender])
+ sys.exit()
+
projects / miniband.git / commitdiff
