nav_switch.h

00001 #include "mbed.h"
00002 
00003 class Nav_Switch
00004 {
00005 public:
00006     Nav_Switch(PinName up,PinName down,PinName left,PinName right,PinName fire);
00007     int read();
00008 //boolean functions to test each switch
00009     bool up();
00010     bool down();
00011     bool left();
00012     bool right();
00013     bool fire();
00014 //automatic read on RHS
00015     operator int ();
00016 //index to any switch array style
00017     bool operator[](int index) {
00018         return _pins[index];
00019     };
00020 private:
00021     BusIn _pins;
00022  
00023 };
00024 Nav_Switch::Nav_Switch (PinName up,PinName down,PinName left,PinName right,PinName fire):
00025     _pins(up, down, left, right, fire)
00026 {
00027     _pins.mode(PullUp); //needed if pullups not on board or a bare nav switch is used - delete otherwise
00028     wait(0.001); //delays just a bit for pullups to pull inputs high
00029 }
00030 inline bool Nav_Switch::up()
00031 {
00032     return !(_pins[0]);
00033 }
00034 inline bool Nav_Switch::down()
00035 {
00036     return !(_pins[1]);
00037 }
00038 inline bool Nav_Switch::left()
00039 {
00040     return !(_pins[2]);
00041 }
00042 inline bool Nav_Switch::right()
00043 {
00044     return !(_pins[3]);
00045 }
00046 inline bool Nav_Switch::fire()
00047 {
00048     return !(_pins[4]);
00049 }
00050 inline int Nav_Switch::read()
00051 {
00052     return _pins.read();
00053 }
00054 inline Nav_Switch::operator int ()
00055 {
00056     return _pins.read();
00057 }