/************************************************************************/
/*                                                                      */
/*                      Debouncing 8 Keys								*/
/*						Sampling 4 Times								*/
/*						With Repeat Function							*/
/*                                                                      */
/*              Author: Peter Dannegger                                 */
/*                      danni@specs.de                                  */
/*                                                                      */
/************************************************************************/

#include "tast.h"


uint32_t key_state;							// debounced and inverted key state:
											// bit = 1: key pressed
uint32_t key_press;							// key press detect
uint32_t key_rpt;							// key long press and repeat


void checkKeys()
{
  static uint32_t ct0, ct1, rpt;
  uint32_t i;

  // ATTENTION! if your pins from button are inverted, change KEY_PIN to ~KEY_PIN
  i = key_state ^ KEY_PIN;		// key changed ?
  ct0 = ~( ct0 & i );			// reset or count ct0
  ct1 = ct0 ^ (ct1 & i);		// reset or count ct1
  i &= ct0 & ct1;			// count until roll over ?
  key_state ^= i;			// then toggle debounced state
  key_press |= key_state & i;		// 0->1: key press detect

  if( (key_state & REPEAT_MASK) == 0 )	// check repeat function
     rpt = REPEAT_START;		// start delay
  if( --rpt == 0 ){
    rpt = REPEAT_NEXT;			// repeat delay
    key_rpt |= key_state & REPEAT_MASK;
  }
}


uint32_t get_key_press( uint32_t key_mask )
{
//  cli();					// read and clear atomic !
  key_mask &= key_press;                        // read key(s)
  key_press ^= key_mask;                        // clear key(s)
//  sei();
  return key_mask;
}


uint32_t get_key_rpt( uint32_t key_mask )
{
//  cli();					// read and clear atomic !
  key_mask &= key_rpt;                        	// read key(s)
  key_rpt ^= key_mask;                        	// clear key(s)
//  sei();
  return key_mask;
}


uint32_t get_key_short( uint32_t key_mask )
{
//  cli();			// read key state and key press atomic !
  return get_key_press( ~key_state & key_mask );
}


uint32_t get_key_long( uint32_t key_mask )
{
  return get_key_press( get_key_rpt( key_mask ));
}

void clear_input(void)
{
  key_state = 0;
  key_press = 0;
  key_rpt = 0;
}



//void initTast()
//{
//	key1_CTRL = 0x18; // Enable pull-up on
//	key2_CTRL = 0x18; // Enable pull-up on
//	key3_CTRL = 0x18; // Enable pull-up on
//	key4_CTRL = 0x18; // Enable pull-up on
//	key5_CTRL = 0x18; // Enable pull-up on
//}