Shinichiro Nakamura
Rotary encoder library.
Dependents: RotaryEncoder_TestProgram ST7735_Pong accuBlast_display
RotaryEncoder.cpp@1:8000eddbf4aa, 2010-12-19 (annotated)
- Committer:
- shintamainjp
- Date:
- Sun Dec 19 05:11:09 2010 +0000
- Revision:
- 1:8000eddbf4aa
- Parent:
- 0:6537b3b709b6
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| shintamainjp | 0:6537b3b709b6 | 1 | /** |
| shintamainjp | 0:6537b3b709b6 | 2 | * ============================================================================= |
| shintamainjp | 0:6537b3b709b6 | 3 | * Rotary Encoder class (Version 0.0.1) |
| shintamainjp | 0:6537b3b709b6 | 4 | * ============================================================================= |
| shintamainjp | 0:6537b3b709b6 | 5 | * Copyright (c) 2010 Shinichiro Nakamura (CuBeatSystems) |
| shintamainjp | 0:6537b3b709b6 | 6 | * |
| shintamainjp | 0:6537b3b709b6 | 7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| shintamainjp | 0:6537b3b709b6 | 8 | * of this software and associated documentation files (the "Software"), to deal |
| shintamainjp | 0:6537b3b709b6 | 9 | * in the Software without restriction, including without limitation the rights |
| shintamainjp | 0:6537b3b709b6 | 10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| shintamainjp | 0:6537b3b709b6 | 11 | * copies of the Software, and to permit persons to whom the Software is |
| shintamainjp | 0:6537b3b709b6 | 12 | * furnished to do so, subject to the following conditions: |
| shintamainjp | 0:6537b3b709b6 | 13 | * |
| shintamainjp | 0:6537b3b709b6 | 14 | * The above copyright notice and this permission notice shall be included in |
| shintamainjp | 0:6537b3b709b6 | 15 | * all copies or substantial portions of the Software. |
| shintamainjp | 0:6537b3b709b6 | 16 | * |
| shintamainjp | 0:6537b3b709b6 | 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| shintamainjp | 0:6537b3b709b6 | 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| shintamainjp | 0:6537b3b709b6 | 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| shintamainjp | 0:6537b3b709b6 | 20 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| shintamainjp | 0:6537b3b709b6 | 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| shintamainjp | 0:6537b3b709b6 | 22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| shintamainjp | 0:6537b3b709b6 | 23 | * THE SOFTWARE. |
| shintamainjp | 0:6537b3b709b6 | 24 | * ============================================================================= |
| shintamainjp | 0:6537b3b709b6 | 25 | */ |
| shintamainjp | 0:6537b3b709b6 | 26 | |
| shintamainjp | 0:6537b3b709b6 | 27 | #include "RotaryEncoder.h" |
| shintamainjp | 0:6537b3b709b6 | 28 | |
| shintamainjp | 0:6537b3b709b6 | 29 | /** |
| shintamainjp | 0:6537b3b709b6 | 30 | * Create rotary encoder. |
| shintamainjp | 0:6537b3b709b6 | 31 | * |
| shintamainjp | 0:6537b3b709b6 | 32 | * @param pin1_name |
| shintamainjp | 0:6537b3b709b6 | 33 | * @param pin2_name |
| shintamainjp | 0:6537b3b709b6 | 34 | * @param min Minimum value. |
| shintamainjp | 0:6537b3b709b6 | 35 | * @param max Maximum value. |
| shintamainjp | 0:6537b3b709b6 | 36 | * @param val Default value. |
| shintamainjp | 0:6537b3b709b6 | 37 | */ |
| shintamainjp | 0:6537b3b709b6 | 38 | RotaryEncoder::RotaryEncoder(PinName pin1_name, PinName pin2_name, int min, int max, int val) |
| shintamainjp | 0:6537b3b709b6 | 39 | : pin1(pin1_name), pin2(pin2_name), min(min), max(max), val(val) { |
| shintamainjp | 0:6537b3b709b6 | 40 | pin1.mode(PullUp); |
| shintamainjp | 0:6537b3b709b6 | 41 | pin2.mode(PullUp); |
| shintamainjp | 0:6537b3b709b6 | 42 | ticker.attach_us(this, &RotaryEncoder::func_ticker, 500); |
| shintamainjp | 0:6537b3b709b6 | 43 | } |
| shintamainjp | 0:6537b3b709b6 | 44 | |
| shintamainjp | 0:6537b3b709b6 | 45 | /** |
| shintamainjp | 0:6537b3b709b6 | 46 | * Dispose. |
| shintamainjp | 0:6537b3b709b6 | 47 | */ |
| shintamainjp | 0:6537b3b709b6 | 48 | RotaryEncoder::~RotaryEncoder() { |
| shintamainjp | 0:6537b3b709b6 | 49 | } |
| shintamainjp | 0:6537b3b709b6 | 50 | |
| shintamainjp | 0:6537b3b709b6 | 51 | /** |
| shintamainjp | 0:6537b3b709b6 | 52 | * Internal tick function. |
| shintamainjp | 0:6537b3b709b6 | 53 | */ |
| shintamainjp | 0:6537b3b709b6 | 54 | void RotaryEncoder::func_ticker() { |
| shintamainjp | 0:6537b3b709b6 | 55 | static uint8_t code; |
| shintamainjp | 0:6537b3b709b6 | 56 | |
| shintamainjp | 0:6537b3b709b6 | 57 | code = (code << 2) + (((pin1.read() << 1) | (pin2.read() << 0)) & 3); |
| shintamainjp | 0:6537b3b709b6 | 58 | code &= 15; |
| shintamainjp | 1:8000eddbf4aa | 59 | switch (code) { |
| shintamainjp | 0:6537b3b709b6 | 60 | case 0x7: |
| shintamainjp | 0:6537b3b709b6 | 61 | if (min < val) { |
| shintamainjp | 0:6537b3b709b6 | 62 | val--; |
| shintamainjp | 0:6537b3b709b6 | 63 | } else { |
| shintamainjp | 0:6537b3b709b6 | 64 | val = min; |
| shintamainjp | 0:6537b3b709b6 | 65 | } |
| shintamainjp | 0:6537b3b709b6 | 66 | break; |
| shintamainjp | 0:6537b3b709b6 | 67 | case 0xd: |
| shintamainjp | 0:6537b3b709b6 | 68 | if (val < max) { |
| shintamainjp | 0:6537b3b709b6 | 69 | val++; |
| shintamainjp | 0:6537b3b709b6 | 70 | } else { |
| shintamainjp | 0:6537b3b709b6 | 71 | val = max; |
| shintamainjp | 0:6537b3b709b6 | 72 | } |
| shintamainjp | 0:6537b3b709b6 | 73 | break; |
| shintamainjp | 0:6537b3b709b6 | 74 | } |
| shintamainjp | 0:6537b3b709b6 | 75 | } |