// ******************************************************************************************* //

#include "p24fj64ga002.h"
#include "keypad.h"

// ******************************************************************************************* //

void KeypadInitialize() {
	
	// TODO: Configure IOs and Change Notificaiton interrupt for keypad scanning. This 
	// configuration should ensure that if any key is pressed, a change notification interrupt 
	// will be generated.
}

// ******************************************************************************************* //

char KeypadScan() {
	char key = -1;
	
	// TODO: Implement the keypad scanning procedure to detect if exactly one button of the 
	// keypad is pressed. The function should return:
	//
	//      0          : Return 0 if no keys are pressed.
	//      '0' - '9'  : Return the ASCII character '0' to '9' if one of the 
	//                   numeric (0 - 9) keys are pressed.
	//      '+'        : Return the ASCII character '+' if the A key is pressed. 
	//      '-'        : Return the ASCII character '-' if the B key is pressed. 
	//      '*'        : Return the ASCII character '*' if the C key is pressed. 
	//      '/'        : Return the ASCII character '/' if the D key is pressed. 
	//       -1        : Return -1 if the * or # keys are pressed, or if more than 
	//                   one key is pressed simultaneously.
	
	return key;
}

// ******************************************************************************************* //