Buttons.cpp

00001 #include "Buttons.h"
00002 #include "PinDetect.h"
00003 
00004 PinDetect nextButton(p14);
00005 PinDetect selectButton(p16);            // Input selectButton
00006 PinDetect prevButton(p15);
00007 
00008 Buttons::Buttons(void): which(0), pressed(false)
00009 {
00010 }
00011 
00012 void Buttons::init()
00013 {
00014 
00015     // Set up button (plugs into two GPIOs, active low
00016     selectButton.mode(PullUp);
00017     selectButton.setSamplesTillAssert(50);
00018     selectButton.setAssertValue(0); // active low logic
00019     selectButton.setSampleFrequency(50); // us
00020     selectButton.attach_asserted( this, &Buttons::selectPressed );
00021     
00022     nextButton.mode(PullUp);
00023     nextButton.setSamplesTillAssert(50);
00024     nextButton.setAssertValue(0); // active low logic
00025     nextButton.setSampleFrequency(50); // us
00026     nextButton.attach_asserted( this, &Buttons::nextPressed );
00027 
00028     prevButton.mode(PullUp);
00029     prevButton.setSamplesTillAssert(50);
00030     prevButton.setAssertValue(0); // active low logic
00031     prevButton.setSampleFrequency(50); // us
00032     prevButton.attach_asserted( this, &Buttons::prevPressed );
00033 }
00034 
00035 void Buttons::nextPressed() 
00036 {
00037     pressed = true;
00038     which = NEXT_BUTTON;
00039 }
00040 
00041 void Buttons::prevPressed() 
00042 {
00043     pressed = true;
00044     which = PREV_BUTTON;
00045 }
00046 
00047 void Buttons::selectPressed()
00048 {
00049     pressed = true;
00050     which = SELECT_BUTTON;
00051 }