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93 lines
2.4 KiB
C++
93 lines
2.4 KiB
C++
/*
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* Author: Yevgeniy Kiveisha <yevgeniy.kiveisha@intel.com>
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* Copyright (c) 2014 Intel Corporation.
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*
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* This program and the accompanying materials are made available under the
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* terms of the The MIT License which is available at
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* https://opensource.org/licenses/MIT.
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*
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* SPDX-License-Identifier: MIT
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*/
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#include <iostream>
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#include <signal.h>
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#include <stdio.h>
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#include "lpd8806.hpp"
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#include "upm_utilities.h"
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void scanner(upm::LPD8806& sensor, uint8_t r, uint8_t g, uint8_t b, uint8_t wait);
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int doWork = 0;
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void
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sig_handler(int signo)
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{
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printf("got signal\n");
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if (signo == SIGINT) {
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printf("exiting application\n");
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doWork = 1;
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}
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}
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int
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main(int argc, char** argv)
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{
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//! [Interesting]
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upm::LPD8806 sensor(0, 7, 10);
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upm_delay_us(1000000);
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sensor.show();
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while (!doWork) {
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// Back-and-forth lights
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scanner(sensor, 127, 0, 0, 30); // red, slow
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scanner(sensor, 0, 0, 127, 15); // blue, fast
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upm_delay_us(1000000);
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}
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//! [Interesting]
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std::cout << "exiting application" << std::endl;
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return 0;
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}
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void
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scanner(upm::LPD8806& sensor, uint8_t r, uint8_t g, uint8_t b, uint8_t wait)
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{
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int i, j, pos, dir;
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pos = 0;
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dir = 1;
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for (i = 0; i < ((sensor.getStripLength() - 1) * 8); i++) {
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// Draw 5 pixels centered on pos. setPixelColor() will clip
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// any pixels off the ends of the strip, no worries there.
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// we'll make the colors dimmer at the edges for a nice pulse
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// look
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sensor.setPixelColor(pos - 2, r / 4, g / 4, b / 4);
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sensor.setPixelColor(pos - 1, r / 2, g / 2, b / 2);
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sensor.setPixelColor(pos, r, g, b);
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sensor.setPixelColor(pos + 1, r / 2, g / 2, b / 2);
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sensor.setPixelColor(pos + 2, r / 4, g / 4, b / 4);
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sensor.show();
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upm_delay_us(wait * 1000);
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// If we wanted to be sneaky we could erase just the tail end
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// pixel, but it's much easier just to erase the whole thing
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// and draw a new one next time.
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for (j = -2; j <= 2; j++) {
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sensor.setPixelColor(pos + j, 0, 0, 0);
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}
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// Bounce off ends of strip
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pos += dir;
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if (pos < 0) {
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pos = 1;
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dir = -dir;
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} else if (pos >= sensor.getStripLength()) {
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pos = sensor.getStripLength() - 2;
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dir = -dir;
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}
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}
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}
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