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
24 // ----- Includes -----
26 // KLL Generated Defines
31 // ----- Defines -----
33 #if ( DebounceDivThreshold_define < 0xFF + 1 )
34 #define DebounceCounter uint8_t
35 #elif ( DebounceDivThreshold_define < 0xFFFF + 1 )
36 #define DebounceCounter uint16_t
37 #elif ( DebounceDivThreshold_define < 0xFFFFFFFF + 1 )
38 #define DebounceCounter uint32_t
40 #error "Debounce threshold is too high... 32 bit max. Check .kll defines."
47 // Freescale MK20s have GPIO ports A...E
56 // Each port has a possible 32 pins
101 // Sense/Strobe configuration
102 typedef enum Config {
103 Config_Pullup, // Internal pull-up
104 Config_Pulldown, // Internal pull-down
105 Config_Opendrain, // External pull resistor
109 typedef enum KeyPosition {
113 KeyState_Release = 3,
119 // ----- Structs -----
121 // Struct container for defining Rows (Sense) and Columns (Strobes)
122 typedef struct GPIO_Pin {
128 typedef struct KeyState {
129 KeyPosition prevState;
130 KeyPosition curState;
131 DebounceCounter activeCount;
132 DebounceCounter inactiveCount;
137 // ----- Functions -----
140 void Matrix_scan( uint16_t scanNum );