Ryo Od / ExioController

Controll MCP23S17 as GPIO

ExioMcp23s17RotaryEncoder.cpp@14:2073b80c69cd, 2016-11-04 (annotated)

Committer:
ryood
Date:
Fri Nov 04 16:09:03 2016 +0000
Revision:
14:2073b80c69cd
Parent:
12:33706f4ace5c 
keypad 4x4: Debounce

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ryood 5:b82675c50720 1 /**
ryood 5:b82675c50720 2 * =============================================================================
ryood 5:b82675c50720 3 * Rotary Encoder class (Version 0.0.1)
ryood 5:b82675c50720 4 * =============================================================================
ryood 5:b82675c50720 5 * Copyright (c) 2010 Shinichiro Nakamura (CuBeatSystems)
ryood 5:b82675c50720 6 *
ryood 5:b82675c50720 7 * Permission is hereby granted, free of charge, to any person obtaining a copy
ryood 5:b82675c50720 8 * of this software and associated documentation files (the "Software"), to deal
ryood 5:b82675c50720 9 * in the Software without restriction, including without limitation the rights
ryood 5:b82675c50720 10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
ryood 5:b82675c50720 11 * copies of the Software, and to permit persons to whom the Software is
ryood 5:b82675c50720 12 * furnished to do so, subject to the following conditions:
ryood 5:b82675c50720 13 *
ryood 5:b82675c50720 14 * The above copyright notice and this permission notice shall be included in
ryood 5:b82675c50720 15 * all copies or substantial portions of the Software.
ryood 5:b82675c50720 16 *
ryood 5:b82675c50720 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
ryood 5:b82675c50720 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
ryood 5:b82675c50720 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
ryood 5:b82675c50720 20 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
ryood 5:b82675c50720 21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
ryood 5:b82675c50720 22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
ryood 5:b82675c50720 23 * THE SOFTWARE.
ryood 5:b82675c50720 24 * =============================================================================
ryood 5:b82675c50720 25 */
ryood 5:b82675c50720 26
ryood 5:b82675c50720 27 /*
ryood 5:b82675c50720 28 * 2016.11.02 Customized for MCP23S17 by rood
ryood 5:b82675c50720 29 */
ryood 5:b82675c50720 30 #include "ExioMcp23s17RotaryEncoder.h"
ryood 5:b82675c50720 31
ryood 5:b82675c50720 32 /**
ryood 5:b82675c50720 33 * Create rotary encoder.
ryood 9:b0e9ec45a720 34 * @param _pDevice
ryood 6:1b3511093630 35 * @param port
ryood 5:b82675c50720 36 * @param pin1
ryood 5:b82675c50720 37 * @param pin2
ryood 5:b82675c50720 38 * @param min Minimum value.
ryood 5:b82675c50720 39 * @param max Maximum value.
ryood 5:b82675c50720 40 * @param val Default value.
ryood 5:b82675c50720 41 */
ryood 6:1b3511093630 42 ExioMcp23s17RotaryEncoder::ExioMcp23s17RotaryEncoder(
ryood 9:b0e9ec45a720 43 ExioMcp23s17* pDevice, ExioPort port, int pin1_n, int pin2_n,
ryood 6:1b3511093630 44 int min, int max, int val)
ryood 6:1b3511093630 45 : min(min), max(max), val(val)
ryood 6:1b3511093630 46 {
ryood 9:b0e9ec45a720 47 in1 = new ExioMcp23s17DigitalIn( pDevice, port, pin1_n);
ryood 9:b0e9ec45a720 48 in2 = new ExioMcp23s17DigitalIn( pDevice, port, pin2_n);
ryood 6:1b3511093630 49 in1->mode(PullUp);
ryood 6:1b3511093630 50 in2->mode(PullUp);
ryood 12:33706f4ace5c 51 //ticker.attach_us(this, &ExioMcp23s17RotaryEncoder::func_ticker, 500);
ryood 5:b82675c50720 52 }
ryood 5:b82675c50720 53
ryood 5:b82675c50720 54 /**
ryood 5:b82675c50720 55 * Dispose.
ryood 5:b82675c50720 56 */
ryood 5:b82675c50720 57 ExioMcp23s17RotaryEncoder::~ExioMcp23s17RotaryEncoder() {
ryood 6:1b3511093630 58 delete in1;
ryood 6:1b3511093630 59 delete in2;
ryood 5:b82675c50720 60 }
ryood 5:b82675c50720 61
ryood 5:b82675c50720 62 /**
ryood 5:b82675c50720 63 * Internal tick function.
ryood 5:b82675c50720 64 */
ryood 5:b82675c50720 65 void ExioMcp23s17RotaryEncoder::func_ticker() {
ryood 5:b82675c50720 66 //static uint8_t code;
ryood 5:b82675c50720 67
ryood 6:1b3511093630 68 code = (code << 2) + (((in1->read() << 1) | (in2->read() << 0)) & 3);
ryood 5:b82675c50720 69 code &= 15;
ryood 5:b82675c50720 70 switch (code) {
ryood 5:b82675c50720 71 case 0x7:
ryood 5:b82675c50720 72 if (min < val) {
ryood 5:b82675c50720 73 val--;
ryood 5:b82675c50720 74 } else {
ryood 5:b82675c50720 75 val = min;
ryood 5:b82675c50720 76 }
ryood 5:b82675c50720 77 break;
ryood 5:b82675c50720 78 case 0xd:
ryood 5:b82675c50720 79 if (val < max) {
ryood 5:b82675c50720 80 val++;
ryood 5:b82675c50720 81 } else {
ryood 5:b82675c50720 82 val = max;
ryood 5:b82675c50720 83 }
ryood 5:b82675c50720 84 break;
ryood 5:b82675c50720 85 }
ryood 5:b82675c50720 86 }