Rotary encoder library.
Dependents: RotaryEncoder_TestProgram ST7735_Pong accuBlast_display
RotaryEncoder.cpp
- Committer:
- shintamainjp
- Date:
- 2010-12-19
- Revision:
- 0:6537b3b709b6
- Child:
- 1:8000eddbf4aa
File content as of revision 0:6537b3b709b6:
/** * ============================================================================= * Rotary Encoder class (Version 0.0.1) * ============================================================================= * Copyright (c) 2010 Shinichiro Nakamura (CuBeatSystems) * * 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. * ============================================================================= */ #include "RotaryEncoder.h" /** * Create rotary encoder. * * @param pin1_name * @param pin2_name * @param min Minimum value. * @param max Maximum value. * @param val Default value. */ RotaryEncoder::RotaryEncoder(PinName pin1_name, PinName pin2_name, int min, int max, int val) : pin1(pin1_name), pin2(pin2_name), min(min), max(max), val(val) { pin1.mode(PullUp); pin2.mode(PullUp); ticker.attach_us(this, &RotaryEncoder::func_ticker, 500); } /** * Dispose. */ RotaryEncoder::~RotaryEncoder() { } /** * Internal tick function. */ void RotaryEncoder::func_ticker() { static uint8_t code; code = (code << 2) + (((pin1.read() << 1) | (pin2.read() << 0)) & 3); code &= 15; switch (i) { case 0x7: if (min < val) { val--; } else { val = min; } break; case 0xd: if (val < max) { val++; } else { val = max; } break; } }