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annotate projects/d-box/StatusLED.cpp @ 269:ac8eb07afcf5

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Oxygen text added to each render.cpp file for the default projects. Text includes project explanation from Wiki, edited in places. Empty project added as a default project. Doxyfile updated. Each of the project locations added to INPUT configuration option. Consider just watching the whole project file so all new projects are automatically pulled through.
author Robert Jack <robert.h.jack@gmail.com>
date Tue, 17 May 2016 15:40:16 +0100
parents 59edd5780fef
children
rev   line source
andrewm@0 1 /*
andrewm@0 2 * StatusLED.cpp
andrewm@0 3 *
andrewm@0 4 * Routines for manipulating the status LED
andrewm@0 5 *
andrewm@0 6 * (c) 2014 Andrew McPherson and Victor Zappi
andrewm@0 7 * QMUL, Centre for Digital Music
andrewm@0 8 */
andrewm@0 9
andrewm@0 10 #include <iostream>
andrewm@0 11 #include "StatusLED.h"
andrewm@68 12 #include <GPIOcontrol.h>
andrewm@0 13
andrewm@0 14 extern int gShouldStop;
andrewm@0 15 extern int gVerbose;
andrewm@0 16
andrewm@0 17 using namespace std;
andrewm@0 18
andrewm@0 19 StatusLED::StatusLED() {
andrewm@0 20 gpio_number = -1;
andrewm@0 21 milliseconds_on = 0;
andrewm@0 22 milliseconds_off = 100;
andrewm@0 23 blink_thread = -1;
andrewm@0 24 }
andrewm@0 25
andrewm@0 26 StatusLED::~StatusLED() {
andrewm@0 27 if(gpio_number >= 0) {
andrewm@0 28 this_should_stop = true;
andrewm@0 29 pthread_join(blink_thread, NULL);
andrewm@0 30 gpio_unexport(gpio_number);
andrewm@0 31 }
andrewm@0 32 }
andrewm@0 33
andrewm@0 34 bool StatusLED::init(int gpio_pin) {
andrewm@0 35 gpio_number = gpio_pin;
andrewm@0 36 this_should_stop = false;
andrewm@0 37
andrewm@0 38 if(gpio_export(gpio_number)) {
andrewm@0 39 if(gVerbose)
andrewm@0 40 cout << "Warning: couldn't export status LED pin\n";
andrewm@0 41 }
andrewm@0 42 if(gpio_set_dir(gpio_number, OUTPUT_PIN)) {
andrewm@0 43 if(gVerbose)
andrewm@0 44 cout << "Couldn't set direction on status LED pin\n";
andrewm@0 45 return false;
andrewm@0 46 }
andrewm@0 47 if(gpio_set_value(gpio_number, LOW)) {
andrewm@0 48 if(gVerbose)
andrewm@0 49 cout << "Couldn't set value on status LED pin\n";
andrewm@0 50 return false;
andrewm@0 51 }
andrewm@0 52
andrewm@0 53
andrewm@0 54 if ( pthread_create(&blink_thread, NULL, static_blink_loop, this) )
andrewm@0 55 {
andrewm@0 56 cout << "Error:unable to create status LED thread" << endl;
andrewm@0 57 return false;
andrewm@0 58 }
andrewm@0 59
andrewm@0 60 return true;
andrewm@0 61 }
andrewm@0 62
andrewm@0 63 void StatusLED::on() {
andrewm@0 64 milliseconds_on = 100;
andrewm@0 65 milliseconds_off = 0;
andrewm@0 66 }
andrewm@0 67
andrewm@0 68 void StatusLED::off() {
andrewm@0 69 milliseconds_on = 0;
andrewm@0 70 milliseconds_off = 100;
andrewm@0 71 }
andrewm@0 72
andrewm@0 73 void StatusLED::blink(int ms_on, int ms_off) {
andrewm@0 74 milliseconds_on = ms_on;
andrewm@0 75 milliseconds_off = ms_off;
andrewm@0 76 }
andrewm@0 77
andrewm@0 78 void* StatusLED::blink_loop(void *) {
andrewm@0 79 while(!gShouldStop && !this_should_stop) {
andrewm@0 80 if(milliseconds_on != 0)
andrewm@0 81 gpio_set_value(gpio_number, HIGH);
andrewm@0 82 usleep(1000 * milliseconds_on);
andrewm@0 83 if(gShouldStop)
andrewm@0 84 break;
andrewm@0 85 if(milliseconds_off != 0)
andrewm@0 86 gpio_set_value(gpio_number, LOW);
andrewm@0 87 usleep(1000 * milliseconds_off);
andrewm@0 88 }
andrewm@0 89 pthread_exit(NULL);
andrewm@0 90 }