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94 lines
2.6 KiB
94 lines
2.6 KiB
4 years ago
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/*
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SoftwareSerial.h
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SoftwareSerial.cpp - Implementation of the Arduino software serial for ESP8266.
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Copyright (c) 2015-2016 Peter Lerup. All rights reserved.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef SoftwareSerial_h
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#define SoftwareSerial_h
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#include <inttypes.h>
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#include <Stream.h>
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// This class is compatible with the corresponding AVR one,
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// the constructor however has an optional rx buffer size.
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// Speed up to 115200 can be used.
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class SoftwareSerial : public Stream {
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public:
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SoftwareSerial(int receivePin, int transmitPin, bool inverse_logic = false, unsigned int buffSize = 64);
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virtual ~SoftwareSerial();
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void begin(long speed);
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long baudRate();
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// Transmit control pin
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void setTransmitEnablePin(int transmitEnablePin);
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// Enable or disable interrupts during tx
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void enableIntTx(bool on);
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bool overflow();
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int peek();
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virtual size_t write(uint8_t byte);
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virtual int read();
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virtual int available();
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virtual void flush();
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operator bool() {return m_rxValid || m_txValid;}
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// Disable or enable interrupts on the rx pin
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void enableRx(bool on);
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// One wire control
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void enableTx(bool on);
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void rxRead();
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// AVR compatibility methods
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bool listen() { enableRx(true); return true; }
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void end() { stopListening(); }
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bool isListening() { return m_rxEnabled; }
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bool stopListening() { enableRx(false); return true; }
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using Print::write;
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private:
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bool isValidGPIOpin(int pin);
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// Member variables
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bool m_oneWire;
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int m_rxPin, m_txPin, m_txEnablePin;
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bool m_rxValid, m_rxEnabled;
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bool m_txValid, m_txEnableValid;
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bool m_invert;
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bool m_overflow;
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unsigned long m_bitTime;
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bool m_intTxEnabled;
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unsigned int m_inPos, m_outPos;
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int m_buffSize;
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uint8_t *m_buffer;
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};
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// If only one tx or rx wanted then use this as parameter for the unused pin
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#define SW_SERIAL_UNUSED_PIN -1
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#endif
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