main.cpp

00001 /* IR remote for D3200 DSLR camera. Should work with other DSLR cameras that support ML-L3 remote. Implemented with mbed
00002    based on a nice documentation of ML-L3 protocol by Michele Bighignoli (http://www.bigmike.it/ircontrol/) */
00003 
00004 #include "mbed.h"
00005 
00006 /* P0_9 is connected to an IR LED and P1_14 to a button in Seeedstudio Arch.
00007    Change these pins as per your platform. */
00008 #define LED_PIN     P0_9
00009 #define BUTTON_PIN  P1_14
00010 
00011 PwmOut IRled(LED_PIN);     /* Connect a suitable current limiting resistor.
00012                               For longer range, use a transistor for driving IR LED */
00013 
00014 DigitalIn button(BUTTON_PIN);  /* Push button to enable shutter release */
00015 
00016 void shutterrelease();
00017 
00018 int main()
00019 {
00020     button.mode(PullDown);
00021     IRled.period_us(26);                // set PWM period for Carrier Frequency of 38.4 KHz
00022     IRled.write(0);
00023 
00024     while(1) {
00025         if(button) {
00026             shutterrelease();
00027         }
00028     }
00029 
00030 }
00031 
00032 void shutterrelease()
00033 {
00034     /* Shutter release command sequence */
00035     IRled.write(0.5);
00036     wait_us(2000);
00037     IRled.write(0);
00038     wait_us(27830);
00039     IRled.write(0.5);
00040     wait_us(400);
00041     IRled.write(0);
00042     wait_us(1580);
00043     IRled.write(0.5);
00044     wait_us(400);
00045     IRled.write(0);
00046     wait_us(3580);
00047     IRled.write(0.5);
00048     wait_us(400);
00049     IRled.write(0);
00050     wait_us(63200);  // Wait for 63.2ms and repeat the above sequence.
00051     IRled.write(0.5);
00052     wait_us(2000);
00053     IRled.write(0);
00054     wait_us(27830);
00055     IRled.write(0.5);
00056     wait_us(400);
00057     IRled.write(0);
00058     wait_us(1580);
00059     IRled.write(0.5);
00060     wait_us(400);
00061     IRled.write(0);
00062     wait_us(3580);
00063     IRled.write(0.5);
00064     wait_us(400);
00065     IRled.write(0);
00066 }