msp430.py

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# coding: utf-8

"""
    MSP module

    A Interface with the hardware
"""
try:
    # Terminal Class
    from serial.tools.miniterm import Miniterm
    from serial.serialutil import SerialException
except Exception as error:
    try:
        import serial
    except ImportError as error:
        print 'Install Pyserial'
        raise error
    if float(serial.VERSION) < 2.6:
        print 'Upgrade Pyserial'
    raise error

import device as sensor
from mock import MagicMock
import util


class MSP(Miniterm):

    """docstring for MSP

    Done with the ideia that all the interface happens
    by UART

    """
    port = 0
    alive = False
    modules={}

    def __init__(self, tty, baud=9600):
        if tty is not []:
            try:
                super(MSP, self).__init__(tty, baud, 'N',
                  False, False)
            except SerialException:
                print util.ROOT_MESSAGE
                exit(-1)
            self.serial.setTimeout(1)
        else:
            """FIXME: remove the code bellow in 
            production environment"""
            self.serial = MagicMock()
            self.serial.readline = util.randomstring
            # raise Exception  
        self.port = tty
        self.enable()

    def __getitem__(self,key):
        """ Return the value of a item """
        try:
            return getattr(self,key).read_data()
        except TypeError:
            return getattr(self,key).read_data('t')
        except IndexError:
            return getattr(self,key).data
        except Exception, e:
            raise e

    def __setitem__(self,key,item):
        """ Set a value of a item """
        # getattr(self,key).write_data('r',str(item))
        getattr(self,key).write_data(str(item))

    def enable(self):
        """ Method to enable the micro """
        self.alive = True

    def desable(self):
        """ Method to desable the micro """
        self.alive = False
        self.serial.close()

if __name__ == '__main__':

    # list available ports
    print 'Available ports:'
    PORTS_AVAILABLE = util.available_ports()
    try:
        for i in PORTS_AVAILABLE:
            print '>>> %s' % i
        print '---'
    except TypeError, error:
        print "None device connected"
        exit()

    # choose a port
    if len(PORTS_AVAILABLE) == 1:
        msp430 = MSP(PORTS_AVAILABLE[0])
    print 'Ready'

    # make 10 reads from adc
    # print '\nRaw data \n----------'
    # for x in xrange(1, 11):
    #     print x, msp430.adc.read_data('t')

    # # define a new reading method
    # def thridfirst(item):
    #     """ Rewritng method """
    #     data = msp430.serial.readline()
    #     return data.split(',')[:3]

    # print msp430['adc']
    # msp430.adc.read_data = thridfirst

    # # make 10 reads from adc using the new method
    # print '\nProcessed data \n----------'
    # for x in xrange(1, 11):
    #     print x, msp430.adc.flush()

    # # example of using a active sensor
    # print '\nActive sensor\'s data \n----------'
    # for x in xrange(1, 11):
    #     print x, msp430.pwm.write_data('r', 't')

    # new microcontroller interface
    msp430.adc = sensor.Direction(msp430.serial,0)
    print '\nADC data \n----------'
    for x in xrange(1,10):
        print msp430['adc']

    msp430.guidao = sensor.Direction(msp430.serial,2)
    print '\nGuidão data \n----------'
    for x in xrange(1,10):
        print msp430['guidao']

    msp430.freio = sensor.Freio(msp430.serial,3)
    print '\nFreio data \n----------'
    for x in xrange(1,11):
        print "Writinh %d..." %x,
        msp430['freio']=x
        print msp430['freio']

    # teste number larger than 9
    msp430.teste = sensor.Direction(msp430.serial,13)
    print '\nTeste data \n----------'
    for x in xrange(1,10):
        print msp430['teste']


    # closes msp430 dependecies
    msp430.desable()