DslrIr.cpp

00001 /**
00002 * MBED code functionality, including idea of modulating PWM signal, taken from
00003 * https://os.mbed.com/users/viswesr/code/DSLR_Camera_IR_Remote/
00004 * As the given values did not work on the Nikon D3300, they were modified,
00005 * parameterized, and put into library form.
00006 * 
00007 * Inspiration, default values, and an Arduino validation signal were taken from
00008 * https://bayesianadventures.wordpress.com/2013/08/09/nikon-ml-l3-ir-remote-hack/
00009 *
00010 * Library instructions were taken from https://os.mbed.com/cookbook/Writing-a-Library
00011 */
00012 
00013 #include "DslrIr.h"
00014 
00015 DslrIr::DslrIr(PinName pin) : _pin(pin) 
00016 {
00017     _pin.period_us(PWM_PERIOD);                // set PWM period for Carrier Frequency of 38.4 KHz
00018     _pin = 0;
00019 }
00020 
00021 
00022 
00023 
00024 void DslrIr::trigger()
00025 {
00026     _pin = ACTIVE_DUTY_CYCLE;
00027     wait_us(SEQ_ON_1_PERIOD);
00028     _pin = 0;
00029     wait_us(SEQ_OFF_1_PERIOD);
00030     _pin = ACTIVE_DUTY_CYCLE;
00031     wait_us(SEQ_ON_2_PERIOD);
00032     _pin = 0;
00033     wait_us(SEQ_OFF_2_PERIOD);
00034     _pin = ACTIVE_DUTY_CYCLE;
00035     wait_us(SEQ_ON_3_PERIOD);
00036     _pin = 0;
00037     wait_us(SEQ_OFF_3_PERIOD);
00038     _pin = ACTIVE_DUTY_CYCLE;
00039     wait_us(SEQ_ON_4_PERIOD);
00040     _pin = 0;
00041     wait_us(SEQ_OFF_4_PERIOD);  // Repeat after 63.2 us
00042     _pin = ACTIVE_DUTY_CYCLE;
00043     _pin = ACTIVE_DUTY_CYCLE;
00044     wait_us(SEQ_ON_1_PERIOD);
00045     _pin = 0;
00046     wait_us(SEQ_OFF_1_PERIOD);
00047     _pin = ACTIVE_DUTY_CYCLE;
00048     wait_us(SEQ_ON_2_PERIOD);
00049     _pin = 0;
00050     wait_us(SEQ_OFF_2_PERIOD);
00051     _pin = ACTIVE_DUTY_CYCLE;
00052     wait_us(SEQ_ON_3_PERIOD);
00053     _pin = 0;
00054     wait_us(SEQ_OFF_3_PERIOD);
00055     _pin = ACTIVE_DUTY_CYCLE;
00056     wait_us(SEQ_ON_4_PERIOD);
00057     _pin = 0;
00058 }