89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
/*
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TasmotaSerial.h - Minimal implementation of software serial for Tasmota
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Copyright (C) 2019 Theo Arends
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This library is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef TasmotaSerial_h
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#define TasmotaSerial_h
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/*********************************************************************************************\
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* TasmotaSerial supports up to 115200 baud with default buffer size of 64 bytes using optional no iram
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*
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* Based on EspSoftwareSerial v3.4.3 by Peter Lerup (https://github.com/plerup/espsoftwareserial)
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\*********************************************************************************************/
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#define TM_SERIAL_BAUDRATE 9600 // Default baudrate
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#define TM_SERIAL_BUFFER_SIZE 64 // Receive buffer size
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#include <core_version.h> // Arduino_Esp8266 version information (ARDUINO_ESP8266_RELEASE and ARDUINO_ESP8266_RELEASE_2_3_0)
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#ifndef ARDUINO_ESP8266_RELEASE_2_3_0
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#define TM_SERIAL_USE_IRAM // Enable to use iram (+368 bytes)
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#endif
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#include <inttypes.h>
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#include <Stream.h>
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class TasmotaSerial : public Stream {
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public:
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TasmotaSerial(int receive_pin, int transmit_pin, int hardware_fallback = 0, int nwmode = 0, int buffer_size = TM_SERIAL_BUFFER_SIZE);
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virtual ~TasmotaSerial();
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bool begin(long speed, int stop_bits = 1);
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bool begin();
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bool hardwareSerial();
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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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void rxRead();
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uint32_t getLoopReadMetric(void) const { return m_bit_follow_metric; }
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using Print::write;
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private:
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bool isValidGPIOpin(int pin);
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size_t txWrite(uint8_t byte);
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// Member variables
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int m_rx_pin;
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int m_tx_pin;
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uint32_t m_stop_bits;
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uint32_t ss_byte;
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uint32_t ss_bstart;
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uint32_t ss_index;
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uint32_t m_bit_time;
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uint32_t m_bit_start_time;
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uint32_t m_bit_follow_metric = 0;
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uint32_t m_in_pos;
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uint32_t m_out_pos;
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uint32_t serial_buffer_size;
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bool m_valid;
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bool m_nwmode;
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bool m_hardserial;
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bool m_hardswap;
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bool m_high_speed = false;
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bool m_very_high_speed = false; // above 100000 bauds
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uint8_t *m_buffer;
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void _fast_write(uint8_t b); // IRAM minimized version
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};
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#endif // TasmotaSerial_h
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