add basic serial communication

software/device.py

@@ -0,0 +1,116 @@
+import serial
+
+class Device:
+
+    def __init__(self):
+        self.ser = serial.Serial()
+
+    def open(self, tty):
+        # (port=None, baudrate=9600, bytesize=EIGHTBITS, parity=PARITY_NONE, stopbits=STOPBITS_ONE, timeout=None, xonxoff=False, rtscts=False, writeTimeout=None, dsrdtr=False, interCharTimeout=None)
+        self.ser.port = tty
+        self.timeout = 1
+        self.ser.open()
+
+    def close(self):
+        self.ser.close()
+
+    def command(self, text):
+        if not self.ser.isOpen():
+            return None
+        self.ser.write(text + '\n')
+        return self.ser.readline().strip()
+
+    """
+    Ping the device
+
+    C> PING
+    E> PONG
+    """
+    def ping(self):
+        return self.command('PING') == 'PONG'
+
+    """
+    Read version
+
+    C> VERSION
+    E> VERSION EDUBRM 1.0.0
+    """
+    def version(self):
+        r = self.command('VERSION')
+        if r:
+            r = r.split(' ')
+            if len(r) == 3 and r[0] == 'VERSION' and r[1] == 'EDUBRM':
+                return r[2]
+        return None
+
+    """
+    Read current configuration
+
+    * O = output
+    * I = input
+    * F = input with glitch filter
+    * P = input with pull-up resistor(10kOhm)
+    * A = input with pull-up resistor and glitch filter
+    * Letter in uppercase means that pin is permitted
+    * Letter in lowercase means pin is not permitted
+
+    C> CFGIO
+    E> CFGIO FOOOPPPPPPPPPPPPOPfPPPPPPIIioAOP
+    """
+    def cfgio(self):
+        r = self.command('CFGIO')
+        if r and r.startswith('CFGIO '):
+            return r[6:]
+        return None
+
+    """
+    Configure GPIO
+
+    C> CFGIO iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
+    E> CFGIO OK
+    """
+    def cfgio(self, state):
+        r = self.command('CFGIO %s' % state)
+        return r == 'CFGIO OK'
+
+    """
+    Read all inputs
+
+    C> GETIO
+    E> GETIO 10011111111111110111111111111101
+    """
+    def getio(self):
+        r = self.command('GETIO')
+        if r and r.startswith('GETIO '):
+            return r[6:]
+        return None
+
+    """
+    Set all outputs to logical 1
+
+    C> SETIO 11111111111111111111111111111111
+    E> SETIO OK
+    """
+    def setio(self, state):
+        r = self.command('SETIO %s' % state)
+        return r == 'SETIO OK'
+
+    """
+    Set all outputs to logical 0
+
+    C> CLRIO 11111111111111111111111111111111
+    E> CLRIO OK
+    """
+    def clrio(self, state):
+        r = self.command('CLRIO %s' % state)
+        return r == 'CLRIO OK'
+
+    """
+    Sending pulse on specified pin of specified duration
+
+    C> PULSE 8 100
+    E> PULSE OK
+    """
+    def pulse(self, pin, duration):
+        r = self.command('PULSE %d %d' % (pin, duration))
+        return r == 'PULSE OK'

software/test-serial.py

@@ -0,0 +1,7 @@
+#!/usr/bin/python
+
+from device import Device
+
+d = Device()
+d.open('')
+d.close()