Eduardo de Mier
Library for manual Encoders as used in user interfaces. Very simple, reduced and rock solid encoder library. Counts full pulses only. Inherent debouncing through state machine. Running on a regular timer IRQ. No IRQ jamming through bouncing. Immune to false edges giving unwanted counts when moving partial steps. Not depending on PinDetect or anything else. May be enhanced by adding acceleration and push button debouncing in the future.
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EncoderConfig.h
00001 // Encoder lib for user interfaces 00002 // Use this file for configuring the pins, timings etc. 00003 /* 00004 The MIT License (MIT) 00005 00006 Copyright (c) 2014 calima engineering 00007 00008 Permission is hereby granted, free of charge, to any person obtaining a copy 00009 of this software and associated documentation files (the "Software"), to deal 00010 in the Software without restriction, including without limitation the rights 00011 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 00012 copies of the Software, and to permit persons to whom the Software is 00013 furnished to do so, subject to the following conditions: 00014 00015 The above copyright notice and this permission notice shall be included in 00016 all copies or substantial portions of the Software. 00017 00018 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 00019 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 00020 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 00021 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 00022 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 00023 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 00024 THE SOFTWARE. 00025 */ 00026 00027 #ifndef ENCODER_CONFIG_H_ 00028 #define ENCODER_CONFIG_H_ 00029 00030 #include "project.h" 00031 00032 // Chose encoder pins 00033 // First tested with Nucleo STM32F302 00034 #define ENCODER_PIN_A D6 00035 #define ENCODER_PIN_B D7 00036 #define ENCODER_PIN_PB D5 00037 00038 // Sample every ... microseconds, default 00039 // 250µs is a good value for cheap 24 ppr encoders (ALPS EC12E24...) with strong bouncing. 00040 // 1000µs is a good value for quality 24 ppr encoders (ALPS EC12E24...) with low bouncing. 00041 // 250µs is a good value for fast 24+ ppr encoders (Sparkfun, Some Bourns types, ...). 00042 #define ENCODER_SAMPLE_PERIOD_US (250) 00043 00044 // Pushbutton debouncing in milliseconds 00045 #define ENCODER_PB_DEBOUNCE_MS (125uL) 00046 00047 00048 #endif // ENCODER_CONFIG_H_
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