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- /* An Alternative Software Serial Library
- * http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html
- * Copyright (c) 2014 PJRC.COM, LLC, Paul Stoffregen, paul@pjrc.com
- *
- * 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.
- */
-
- #ifndef AltSoftSerial_h
- #define AltSoftSerial_h
-
- #include <inttypes.h>
-
- #if ARDUINO >= 100
- #include "Arduino.h"
- #else
- #include "WProgram.h"
- #include "pins_arduino.h"
- #endif
-
- #if defined(__arm__) && defined(CORE_TEENSY)
- #define ALTSS_BASE_FREQ F_BUS
- #else
- #define ALTSS_BASE_FREQ F_CPU
- #endif
-
- /** AltSoftSerial class */
- class AltSoftSerial : public Stream
- {
- public:
- AltSoftSerial() { } //!< Constructor
- ~AltSoftSerial()
- {
- end(); //!< Destructor
- }
- static void begin(uint32_t baud)
- {
- init((ALTSS_BASE_FREQ + baud / 2) / baud); //!< begin
- }
- static void end(); //!< end
- int peek(); //!< peek
- int read(); //!< read
- int available(); //!< available
- #if ARDUINO >= 100
- size_t write(uint8_t byte)
- {
- writeByte(byte); //!< write
- return 1;
- }
- void flush()
- {
- flushOutput(); //!< flush
- }
- #else
- void write(uint8_t byte)
- {
- writeByte(byte); //!< write
- }
- void flush()
- {
- flushInput(); //!< flush
- }
- #endif
- using Print::write;
- static void flushInput(); //!< flushInput
- static void flushOutput(); //!< flushOutput
- // for drop-in compatibility with NewSoftSerial, rxPin & txPin ignored
- AltSoftSerial(uint8_t rxPin, uint8_t txPin, bool inverse = false)
- {
- (void)rxPin; //!< AltSoftSerial
- (void)txPin;
- (void)inverse;
- }
- bool listen()
- {
- return false; //!< listen
- }
- bool isListening()
- {
- return true; //!< isListening
- }
- bool overflow()
- {
- bool r = timing_error; //!< overflow
- timing_error = false;
- return r;
- }
- static int library_version()
- {
- return 1; //!< library_version
- }
- static void enable_timer0(bool enable)
- {
- (void)enable; //!< enable_timer0
- }
- static bool timing_error; //!< timing_error
- private:
- static void init(uint32_t cycles_per_bit);
- static void writeByte(uint8_t byte);
- };
-
- #endif
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