Alef Sin / PulseDecoder

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Show/hide line numbers pulse_decoder.cpp Source File

pulse_decoder.cpp

00001 #include "mbed.h"
00002 #include "pulse_decoder.h"
00003 
00004 pulse_decoder::pulse_decoder(PinName pin)
00005     : interrupt(pin), high_period(0), low_period(false)
00006 {
00007     interrupt.rise(this, &pulse_decoder::rising_edge);
00008     interrupt.fall(this, &pulse_decoder::falling_edge);
00009 }
00010 
00011 void pulse_decoder::rising_edge()
00012 {
00013     high_timer.start();
00014     low_timer.stop();
00015     
00016     low_period = low_timer.read_us();  
00017     low_timer.reset();  
00018 }
00019 
00020 void pulse_decoder::falling_edge()
00021 {
00022     high_timer.stop();
00023     low_timer.start();
00024     
00025     high_period = high_timer.read_us();
00026     high_timer.reset();
00027 }
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