AT42QT1010.h

00001 #ifndef AT42QT1010_H
00002 #define AT42QT1010_H
00003 
00004 #include "mbed.h"
00005 
00006 ///Class for the AT42QT1010 Capactitive Touch Sensor
00007 class AT42QT1010 {
00008     
00009     public:
00010     /**Define the device without use of the on-board LED*/
00011         explicit AT42QT1010(PinName);
00012     /**Define the device using both breakout I/O pins.  Requires manual modification to the breakout before use.*/
00013         explicit AT42QT1010(PinName, PinName);
00014         ~AT42QT1010();
00015     /**Writes to the LED, if defined.
00016     @param state 0 or 1 to power the LED
00017     */
00018         void write(int state);
00019     /**Take in the current value being output by the device.*/
00020         int read();
00021     /**Shorthand for read().*/
00022         operator int(){return _data;}
00023     /**Initiate interrupts for the rising edge of data.
00024     @param fpr Function pointer to interrupt routine.
00025     */
00026         void attach_rise(void (*fpr)(void));
00027         /**Initiate interrupts for the falling edge of data.
00028     @param fpr Function pointer to interrupt routine.
00029     */
00030         void attach_fall(void (*fpr)(void));
00031     private:
00032         InterruptIn _data;
00033         DigitalOut *_led_state;
00034 };
00035 
00036 AT42QT1010::AT42QT1010(PinName data) : _data(data) {
00037     _led_state=NULL;
00038 }
00039 
00040 AT42QT1010::AT42QT1010(PinName data, PinName led_pin) : _data(data){
00041     _led_state = (DigitalOut *) new DigitalOut(led_pin);
00042 }
00043 
00044 AT42QT1010::~AT42QT1010(){
00045     if(_led_state!=NULL){
00046         delete _led_state;
00047     }
00048 }
00049 
00050 void AT42QT1010::write(int state){
00051     if(_led_state!=NULL){
00052         if(state!=0) (*_led_state)=1;
00053         else (*_led_state)=0;
00054     }
00055 }
00056 
00057 int AT42QT1010::read(){
00058     return _data;
00059 }
00060 
00061 void AT42QT1010::attach_rise(void (*fpr)(void)){
00062     _data.rise(fpr);
00063 }
00064 void AT42QT1010::attach_fall(void (*fpr)(void)){
00065     _data.fall(fpr);
00066 }
00067 
00068 #endif