77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
/* An Alternative Software Serial Library
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* http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html
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* Copyright (c) 2014 PJRC.COM, LLC, Paul Stoffregen, paul@pjrc.com
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef AltSoftSerial_h
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#define AltSoftSerial_h
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#include <inttypes.h>
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#if ARDUINO >= 100
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#include "Arduino.h"
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#else
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#include "WProgram.h"
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#include "pins_arduino.h"
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#endif
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#if defined(__arm__) && defined(CORE_TEENSY)
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#define ALTSS_BASE_FREQ F_BUS
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#else
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#define ALTSS_BASE_FREQ F_CPU
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#endif
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/** AltSoftSerial class */
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class AltSoftSerial : public Stream
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{
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public:
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AltSoftSerial() { } //!< Constructor
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~AltSoftSerial() { end(); } //!< Destructor
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static void begin(uint32_t baud) { init((ALTSS_BASE_FREQ + baud / 2) / baud); } //!< begin
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static void end(); //!< end
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int peek(); //!< peek
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int read(); //!< read
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int available(); //!< available
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#if ARDUINO >= 100
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size_t write(uint8_t byte) { writeByte(byte); return 1; } //!< write
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void flush() { flushOutput(); } //!< flush
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#else
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void write(uint8_t byte) { writeByte(byte); } //!< write
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void flush() { flushInput(); } //!< flush
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#endif
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using Print::write;
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static void flushInput(); //!< flushInput
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static void flushOutput(); //!< flushOutput
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// for drop-in compatibility with NewSoftSerial, rxPin & txPin ignored
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//AltSoftSerial(uint8_t rxPin, uint8_t txPin, bool inverse = false) { }
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bool listen() { return false; } //!< listen
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bool isListening() { return true; } //!< isListening
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bool overflow() { bool r = timing_error; timing_error = false; return r; } //!< overflow
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static int library_version() { return 1; } //!< library_version
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static void enable_timer0(bool) { } //!< enable_timer0
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static bool timing_error; //!< timing_error
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private:
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static void init(uint32_t cycles_per_bit);
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static void writeByte(uint8_t byte);
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};
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#endif
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