PushButton.cpp

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00033 
00034 #include "PushButton.h"
00035 #include "Peripherals.h"
00036 
00037 PushButton::PushButton(PinName pin) : interruptButton(pin) {
00038   this->pin = pin;
00039 
00040   interruptButton.mode(PullUp);
00041   debouncingState = false;
00042   // Delay for initial pullup to take effect
00043   wait(0.01f);
00044   // Attach the address of the interrupt handler routine for pushbutton
00045   interruptButton.fall(callback(this, &PushButton::pb_hit_interrupt_fall));
00046 }
00047 
00048 bool PushButton::GetButtonFallState(void) { 
00049  return buttonFallState; 
00050 }
00051 
00052 void PushButton::SetButtonFallState(bool state) { 
00053  buttonFallState = state; 
00054 }
00055 
00056 void PushButton::clearButtonFallState(void) { 
00057  buttonFallState = false; 
00058 }
00059 
00060 int PushButton::Read(void) { 
00061  return interruptButton.read(); 
00062 }
00063 
00064 void PushButton::pb_hit_interrupt_fall(void) {
00065     /* switch debouncing */
00066     if (!debouncingState)
00067     {
00068         timeout.attach(callback(this, &PushButton::pb_debounce_timeout), debounceTime);
00069     }   
00070 }
00071 
00072 void PushButton::pb_debounce_timeout(void) {
00073     if (!interruptButton.read())
00074     {
00075         if (Peripherals::pushButton() != NULL){
00076             Peripherals::pushButton()->SetButtonFallState(true);
00077         }
00078     }
00079     debouncingState = false;
00080 }
00081