upm/examples/c++/lpd8806.cxx

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/*
* Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
* Copyright (c) 2014 Intel Corporation.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include <iostream>
#include <signal.h>
#include <stdio.h>
#include "lpd8806.hpp"
#include "upm_utilities.h"
void scanner(upm::LPD8806& sensor, uint8_t r, uint8_t g, uint8_t b, uint8_t wait);
int doWork = 0;
void
sig_handler(int signo)
{
printf("got signal\n");
if (signo == SIGINT) {
printf("exiting application\n");
doWork = 1;
}
}
int
main(int argc, char** argv)
{
//! [Interesting]
upm::LPD8806 sensor(0, 7, 10);
upm_delay_us(1000000);
sensor.show();
while (!doWork) {
// Back-and-forth lights
scanner(sensor, 127, 0, 0, 30); // red, slow
scanner(sensor, 0, 0, 127, 15); // blue, fast
upm_delay_us(1000000);
}
//! [Interesting]
std::cout << "exiting application" << std::endl;
return 0;
}
void
scanner(upm::LPD8806& sensor, uint8_t r, uint8_t g, uint8_t b, uint8_t wait)
{
int i, j, pos, dir;
pos = 0;
dir = 1;
for (i = 0; i < ((sensor.getStripLength() - 1) * 8); i++) {
// Draw 5 pixels centered on pos. setPixelColor() will clip
// any pixels off the ends of the strip, no worries there.
// we'll make the colors dimmer at the edges for a nice pulse
// look
sensor.setPixelColor(pos - 2, r / 4, g / 4, b / 4);
sensor.setPixelColor(pos - 1, r / 2, g / 2, b / 2);
sensor.setPixelColor(pos, r, g, b);
sensor.setPixelColor(pos + 1, r / 2, g / 2, b / 2);
sensor.setPixelColor(pos + 2, r / 4, g / 4, b / 4);
sensor.show();
upm_delay_us(wait * 1000);
// If we wanted to be sneaky we could erase just the tail end
// pixel, but it's much easier just to erase the whole thing
// and draw a new one next time.
for (j = -2; j <= 2; j++) {
sensor.setPixelColor(pos + j, 0, 0, 0);
}
// Bounce off ends of strip
pos += dir;
if (pos < 0) {
pos = 1;
dir = -dir;
} else if (pos >= sensor.getStripLength()) {
pos = sensor.getStripLength() - 2;
dir = -dir;
}
}
}