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AltSoftSerial.h
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AltSoftSerial.h
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/******************************************************************************
* @file AltSoftSerial.h
* @author Rémi Pincent - INRIA
* @date 24 nov. 2015
*
* @brief Bit-Banging uart - Tx buffered
*
* Project : AltSoftSerial
* Contact: Rémi Pincent - remi.pincent@inria.fr
*
* Originally from
*
* LICENSE :
* AltSoftSerial (c) by Rémi Pincent
* AltSoftSerial is licensed under a
* Creative Commons Attribution-NonCommercial 3.0 Unported License.
*
* You should have received a copy of the license along with this
* work. If not, see <http://creativecommons.org/licenses/by-nc/3.0/>.
*
* ORIGINALLY FROM :
* 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>
#include <ring_buffer.h>
extern "C"
{
#include <timeslot.h>
}
#if ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#include "pins_arduino.h"
#endif
class AltSoftSerial : public Stream
{
private :
static const uint8_t TX_BUFFER_SIZE = 80;
uint8_t _u8_txPin;
uint16_t _u16_ticks_per_bit;
uint32_t _u32_mics_per_byte;
bool _b_uartBusy;
bool timing_error;
uint8_t _u8_sendByte;
RingBuffer<uint8_t> _txBuffer;
int8_t _bit_pos;
public:
/** instance */
static AltSoftSerial SoftSerial;
public:
AltSoftSerial();
virtual ~AltSoftSerial() { end(); }
void begin(uint32_t baud, uint8_t txPin);
void end();
/** RX not implemented */
int peek(){return 0;};
/** RX not implemented */
int read(){return 0;};
/** RX not implemented */
int available(){return 0;};
#if ARDUINO >= 100
size_t write(uint8_t byte) { writeByte(byte); return 1; }
void flush() { flushOutput(); }
#else
void write(uint8_t byte) { writeByte(byte); }
void flush() { flushInput(); }
#endif
using Print::write;
/** RX not implemented */
void flushInput(){return;};
void flushOutput();
// for drop-in compatibility with NewSoftSerial, rxPin & txPin ignored
AltSoftSerial(uint8_t rxPin, uint8_t txPin, bool inverse = false) : AltSoftSerial() { }
bool listen() { return false; }
bool isListening() { return true; }
bool overflow() { bool r = timing_error; timing_error = false; return r; }
static int library_version() { return 1; }
static void txTimer0IRQ(TsNextAction* arg_p_nextAction);
static void prepare(TsNextAction*);
private:
void initTimer(void);
void stopTimer(void);
bool writeByte(uint8_t byte);
void startTimer0();
};
#endif