[Debugger] Implementation of transport over serial connection (#2800)

JerryScript-DCO-1.0-Signed-off-by: Robert Sipka rsipka.uszeged@partner.samsung.com

jerry-debugger/jerry_client_serial.py

@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+
+# Copyright JS Foundation and other contributors, http://js.foundation
+#
+# 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 select
+import serial
+
+class Serial(object):
+    """ Create a new socket using the given address family, socket type and protocol number. """
+    def __init__(self, serial_config):
+        config = serial_config.split(',')
+        config_size = len(config)
+
+        port = config[0] if config_size > 0 else "/dev/ttyUSB0"
+        baudrate = config[1] if config_size > 1 else 115200
+        bytesize = int(config[2]) if config_size > 2 else 8
+        parity = config[3] if config_size > 3 else 'N'
+        stopbits = int(config[4]) if config_size > 4 else 1
+
+        self.ser = serial.Serial(port=port, baudrate=baudrate, parity=parity,
+                                 stopbits=stopbits, bytesize=bytesize, timeout=1)
+
+    def connect(self):
+        """ Connect to the server, write a 'c' to the serial port """
+        self.send_data('c')
+
+    def close(self):
+        """"  close the serial port. """
+        self.ser.close()
+
+    def receive_data(self, max_size=1024):
+        """ The maximum amount of data to be received at once is specified by max_size. """
+        return self.ser.read(max_size)
+
+    def send_data(self, data):
+        """ Write data to the serial port. """
+        return self.ser.write(data)
+
+    def ready(self):
+        """ Monitor the file descriptor. """
+        result = select.select([self.ser.fileno()], [], [], 0)[0]
+
+        return self.ser.fileno() in result