#! /usr/bin/env python
#
# This file is part of the libopencm3 project.
#
# Copyright (C) 2011 Piotr Esden-Tempski <piotr@esden.net>
#
# This library is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with this library.  If not, see <http://www.gnu.org/licenses/>.
#

import serial
import signal
import sys
import time

def signal_handler(signal, frame):
        print 'You pressed Ctrl+C!'
        ser.close();
        sys.exit(0)

signal.signal(signal.SIGINT, signal_handler);

ser = serial.Serial('/dev/cu.usbmodemDEM1', 115200, timeout=0.05);

error = 0

tim = time.time();

cycles = 0

while 1==1:

    ser.write("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890!@#$%^&*(){}");

    buf = ser.read(1024);

    cycles += 1

    if buf != "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890!@#$%^&*(){}" :
        error+=1

    print "received " + buf + " errors: " + str(error) + " cycles: " + str(cycles) + " runtime: " + str(time.time() - tim)

    #time.sleep(0.1);

ser.close();