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add basic serial communication
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2 changed files with 123 additions and 0 deletions
116
software/device.py
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116
software/device.py
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import serial
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class Device:
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def __init__(self):
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self.ser = serial.Serial()
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def open(self, tty):
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# (port=None, baudrate=9600, bytesize=EIGHTBITS, parity=PARITY_NONE, stopbits=STOPBITS_ONE, timeout=None, xonxoff=False, rtscts=False, writeTimeout=None, dsrdtr=False, interCharTimeout=None)
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self.ser.port = tty
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self.timeout = 1
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self.ser.open()
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def close(self):
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self.ser.close()
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def command(self, text):
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if not self.ser.isOpen():
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return None
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self.ser.write(text + '\n')
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return self.ser.readline().strip()
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"""
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Ping the device
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C> PING
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E> PONG
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"""
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def ping(self):
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return self.command('PING') == 'PONG'
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"""
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Read version
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C> VERSION
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E> VERSION EDUBRM 1.0.0
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"""
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def version(self):
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r = self.command('VERSION')
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if r:
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r = r.split(' ')
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if len(r) == 3 and r[0] == 'VERSION' and r[1] == 'EDUBRM':
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return r[2]
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return None
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"""
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Read current configuration
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* O = output
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* I = input
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* F = input with glitch filter
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* P = input with pull-up resistor(10kOhm)
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* A = input with pull-up resistor and glitch filter
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* Letter in uppercase means that pin is permitted
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* Letter in lowercase means pin is not permitted
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C> CFGIO
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E> CFGIO FOOOPPPPPPPPPPPPOPfPPPPPPIIioAOP
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"""
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def cfgio(self):
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r = self.command('CFGIO')
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if r and r.startswith('CFGIO '):
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return r[6:]
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return None
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"""
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Configure GPIO
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C> CFGIO iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii
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E> CFGIO OK
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"""
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def cfgio(self, state):
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r = self.command('CFGIO %s' % state)
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return r == 'CFGIO OK'
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"""
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Read all inputs
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C> GETIO
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E> GETIO 10011111111111110111111111111101
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"""
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def getio(self):
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r = self.command('GETIO')
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if r and r.startswith('GETIO '):
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return r[6:]
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return None
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"""
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Set all outputs to logical 1
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C> SETIO 11111111111111111111111111111111
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E> SETIO OK
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"""
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def setio(self, state):
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r = self.command('SETIO %s' % state)
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return r == 'SETIO OK'
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"""
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Set all outputs to logical 0
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C> CLRIO 11111111111111111111111111111111
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E> CLRIO OK
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"""
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def clrio(self, state):
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r = self.command('CLRIO %s' % state)
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return r == 'CLRIO OK'
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"""
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Sending pulse on specified pin of specified duration
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C> PULSE 8 100
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E> PULSE OK
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"""
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def pulse(self, pin, duration):
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r = self.command('PULSE %d %d' % (pin, duration))
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return r == 'PULSE OK'
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7
software/test-serial.py
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7
software/test-serial.py
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#!/usr/bin/python
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from device import Device
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d = Device()
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d.open('')
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d.close()
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