1#!/usr/bin/env python
2
3# Author: Thomas Ingleby <thomas.c.ingleby@intel.com>
4# Copyright (c) 2014 Intel Corporation.
5#
6# Permission is hereby granted, free of charge, to any person obtaining
7# a copy of this software and associated documentation files (the
8# "Software"), to deal in the Software without restriction, including
9# without limitation the rights to use, copy, modify, merge, publish,
10# distribute, sublicense, and/or sell copies of the Software, and to
11# permit persons to whom the Software is furnished to do so, subject to
12# the following conditions:
13#
14# The above copyright notice and this permission notice shall be
15# included in all copies or substantial portions of the Software.
16#
17# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
21# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
22# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
23# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24
25import mraa
26import time
27
28x = mraa.Pwm(3)
29x.period_us(700)
30x.enable(True)
31value= 0.0
32
33while True:
34    x.write(value)
35    time.sleep(0.05)
36    value = value + 0.01
37    if value >= 1:
38        value = 0.0
39