1 /* Copyright (C) 2014-2015 by Jacob Alexander
3 * Permission is hereby granted, free of charge, to any person obtaining a copy
4 * of this software and associated documentation files (the "Software"), to deal
5 * in the Software without restriction, including without limitation the rights
6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
7 * copies of the Software, and to permit persons to whom the Software is
8 * furnished to do so, subject to the following conditions:
10 * The above copyright notice and this permission notice shall be included in
11 * all copies or substantial portions of the Software.
13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22 #ifndef __MATRIX_SCAN_H
23 #define __MATRIX_SCAN_H
25 // ----- Includes -----
27 // KLL Generated Defines
32 // ----- Defines -----
34 #if ( DebounceDivThreshold_define < 0xFF + 1 )
35 #define DebounceCounter uint8_t
36 #elif ( DebounceDivThreshold_define < 0xFFFF + 1 )
37 #define DebounceCounter uint16_t
38 #elif ( DebounceDivThreshold_define < 0xFFFFFFFF + 1 )
39 #define DebounceCounter uint32_t
41 #error "Debounce threshold is too high... 32 bit max. Check .kll defines."
48 // Freescale MK20s have GPIO ports A...E
57 // Each port has a possible 32 pins
102 // Sense/Strobe configuration
103 typedef enum Config {
104 Config_Pullup, // Internal pull-up
105 Config_Pulldown, // Internal pull-down
106 Config_Opendrain, // External pull resistor
110 typedef enum KeyPosition {
114 KeyState_Release = 3,
120 // ----- Structs -----
122 // Struct container for defining Rows (Sense) and Columns (Strobes)
123 typedef struct GPIO_Pin {
129 typedef struct KeyState {
130 KeyPosition prevState;
131 KeyPosition curState;
132 DebounceCounter activeCount;
133 DebounceCounter inactiveCount;
138 // ----- Functions -----
141 void Matrix_scan( uint16_t scanNum );
144 #endif // __MATRIX_SCAN_H