serialhdl: Retry opening of serial port
Continually retry to open the serial port. This helps with connecting to some micro-controllers. Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
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@ -59,14 +59,29 @@ class SerialReader:
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def connect(self):
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def connect(self):
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# Initial connection
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# Initial connection
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logging.info("Starting serial connect")
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logging.info("Starting serial connect")
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self.ser = serial.Serial(self.serialport, self.baud, timeout=0)
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while 1:
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stk500v2_leave(self.ser, self.reactor)
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starttime = time.time()
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self.serialqueue = self.ffi_lib.serialqueue_alloc(self.ser.fileno(), 0)
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try:
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self.background_thread = threading.Thread(target=self._bg_thread)
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self.ser = serial.Serial(self.serialport, self.baud, timeout=0)
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self.background_thread.start()
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except OSError, e:
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# Obtain and load the data dictionary from the firmware
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logging.warn("Unable to open port: %s" % (e,))
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sbs = SerialBootStrap(self)
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self.reactor.pause(starttime + 5.)
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identify_data = sbs.get_identify_data()
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continue
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stk500v2_leave(self.ser, self.reactor)
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self.serialqueue = self.ffi_lib.serialqueue_alloc(
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self.ser.fileno(), 0)
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self.background_thread = threading.Thread(target=self._bg_thread)
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self.background_thread.start()
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# Obtain and load the data dictionary from the firmware
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sbs = SerialBootStrap(self)
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identify_data = sbs.get_identify_data(starttime + 5.)
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if identify_data is None:
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logging.warn("Timeout on serial connect")
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self.disconnect()
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self.ser.close()
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self.ser = None
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continue
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break
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msgparser = msgproto.MessageParser()
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msgparser = msgproto.MessageParser()
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msgparser.process_identify(identify_data)
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msgparser.process_identify(identify_data)
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self.msgparser = msgparser
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self.msgparser = msgparser
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@ -250,12 +265,14 @@ class SerialBootStrap:
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self.serial.register_callback(self.handle_unknown, '#unknown')
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self.serial.register_callback(self.handle_unknown, '#unknown')
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self.send_timer = self.serial.reactor.register_timer(
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self.send_timer = self.serial.reactor.register_timer(
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self.send_event, self.serial.reactor.NOW)
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self.send_event, self.serial.reactor.NOW)
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def get_identify_data(self):
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def get_identify_data(self, timeout):
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eventtime = time.time()
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eventtime = time.time()
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while not self.is_done:
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while not self.is_done and eventtime <= timeout:
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eventtime = self.serial.reactor.pause(eventtime + 0.05)
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eventtime = self.serial.reactor.pause(eventtime + 0.05)
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self.serial.unregister_callback('identify_response')
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self.serial.unregister_callback('identify_response')
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self.serial.reactor.unregister_timer(self.send_timer)
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self.serial.reactor.unregister_timer(self.send_timer)
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if not self.is_done:
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return None
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return self.identify_data
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return self.identify_data
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def handle_identify(self, params):
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def handle_identify(self, params):
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if self.is_done or params['offset'] != len(self.identify_data):
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if self.is_done or params['offset'] != len(self.identify_data):
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