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controller/Scan/matrix/scan_loop.h
2011-11-28 22:20:04 -08:00

63 lines
1.9 KiB
C

/* Copyright (C) 2011 by Jacob Alexander
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef __SCAN_LOOP_H
#define __SCAN_LOOP_H
// ----- Includes -----
// Compiler Includes
#include <stdint.h>
// Local Includes
#include "matrix_scan.h"
// Matrix Configuration
#include <matrix.h>
// ----- Defines -----
#define KEYBOARD_BUFFER 24 // Max number of key signals to buffer
// ----- Variables -----
// NOTE: Highest Bit: Valid keypress (0x80 is valid keypress)
// Other Bits: Pressed state sample counter
extern uint8_t KeyIndex_Array [KEYBOARD_SIZE + 1];
static const uint8_t KeyIndex_Size = KEYBOARD_SIZE;
extern volatile uint8_t KeyIndex_Buffer[KEYBOARD_BUFFER];
extern volatile uint8_t KeyIndex_BufferUsed;
// ----- Functions -----
void scan_setup( void );
uint8_t scan_loop( void );
#endif // __SCAN_LOOP_H