Lino Barreca
5 years ago
committed by
Scott Lahteine
Scott Lahteine
31 changed files with 1289 additions and 519 deletions
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/*
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* SoftwareSerial.cpp (formerly NewSoftSerial.cpp) |
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* |
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* Multi-instance software serial library for Arduino/Wiring |
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* -- Interrupt-driven receive and other improvements by ladyada |
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* (http://ladyada.net)
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* -- Tuning, circular buffer, derivation from class Print/Stream, |
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* multi-instance support, porting to 8MHz processors, |
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* various optimizations, PROGMEM delay tables, inverse logic and |
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* direct port writing by Mikal Hart (http://www.arduiniana.org)
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* -- Pin change interrupt macros by Paul Stoffregen (http://www.pjrc.com)
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* -- 20MHz processor support by Garrett Mace (http://www.macetech.com)
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* -- ATmega1280/2560 support by Brett Hagman (http://www.roguerobotics.com/)
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* -- STM32 support by Armin van der Togt |
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* |
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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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* |
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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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* |
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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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* The latest version of this library can always be found at |
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* http://arduiniana.org.
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*/ |
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//
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// Includes
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//
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#include "SoftwareSerial.h" |
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#include <timer.h> |
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#define OVERSAMPLE 3 // in RX, Timer will generate interruption OVERSAMPLE time during a bit. Thus OVERSAMPLE ticks in a bit. (interrupt not synchonized with edge).
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// defined in bit-periods
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#define HALFDUPLEX_SWITCH_DELAY 5 |
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// It's best to define TIMER_SERIAL in variant.h. If not defined, we choose one here
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// The order is based on (lack of) features and compare channels, we choose the simplest available
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// because we only need an update interrupt
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#if !defined(TIMER_SERIAL) |
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#if defined (TIM18_BASE) |
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#define TIMER_SERIAL TIM18 |
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#elif defined (TIM7_BASE) |
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#define TIMER_SERIAL TIM7 |
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#elif defined (TIM6_BASE) |
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#define TIMER_SERIAL TIM6 |
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#elif defined (TIM22_BASE) |
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#define TIMER_SERIAL TIM22 |
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#elif defined (TIM21_BASE) |
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#define TIMER_SERIAL TIM21 |
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#elif defined (TIM17_BASE) |
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#define TIMER_SERIAL TIM17 |
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#elif defined (TIM16_BASE) |
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#define TIMER_SERIAL TIM16 |
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#elif defined (TIM15_BASE) |
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#define TIMER_SERIAL TIM15 |
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#elif defined (TIM14_BASE) |
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#define TIMER_SERIAL TIM14 |
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#elif defined (TIM13_BASE) |
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#define TIMER_SERIAL TIM13 |
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#elif defined (TIM11_BASE) |
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#define TIMER_SERIAL TIM11 |
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#elif defined (TIM10_BASE) |
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#define TIMER_SERIAL TIM10 |
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#elif defined (TIM12_BASE) |
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#define TIMER_SERIAL TIM12 |
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#elif defined (TIM19_BASE) |
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#define TIMER_SERIAL TIM19 |
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#elif defined (TIM9_BASE) |
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#define TIMER_SERIAL TIM9 |
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#elif defined (TIM5_BASE) |
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#define TIMER_SERIAL TIM5 |
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#elif defined (TIM4_BASE) |
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#define TIMER_SERIAL TIM4 |
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#elif defined (TIM3_BASE) |
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#define TIMER_SERIAL TIM3 |
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#elif defined (TIM2_BASE) |
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#define TIMER_SERIAL TIM2 |
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#elif defined (TIM20_BASE) |
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#define TIMER_SERIAL TIM20 |
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#elif defined (TIM8_BASE) |
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#define TIMER_SERIAL TIM8 |
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#elif defined (TIM1_BASE) |
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#define TIMER_SERIAL TIM1 |
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#else |
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#error No suitable timer found for SoftwareSerial, define TIMER_SERIAL in variant.h |
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#endif |
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#endif |
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//
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// Statics
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//
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HardwareTimer SoftwareSerial::timer(TIMER_SERIAL); |
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const IRQn_Type SoftwareSerial::timer_interrupt_number = static_cast<IRQn_Type>(getTimerUpIrq(TIMER_SERIAL)); |
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uint32_t SoftwareSerial::timer_interrupt_priority = NVIC_EncodePriority(NVIC_GetPriorityGrouping(), TIM_IRQ_PRIO, TIM_IRQ_SUBPRIO); |
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SoftwareSerial *SoftwareSerial::active_listener = nullptr; |
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SoftwareSerial *volatile SoftwareSerial::active_out = nullptr; |
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SoftwareSerial *volatile SoftwareSerial::active_in = nullptr; |
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int32_t SoftwareSerial::tx_tick_cnt = 0; // OVERSAMPLE ticks needed for a bit
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int32_t volatile SoftwareSerial::rx_tick_cnt = 0; // OVERSAMPLE ticks needed for a bit
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uint32_t SoftwareSerial::tx_buffer = 0; |
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int32_t SoftwareSerial::tx_bit_cnt = 0; |
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uint32_t SoftwareSerial::rx_buffer = 0; |
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int32_t SoftwareSerial::rx_bit_cnt = -1; // rx_bit_cnt = -1 : waiting for start bit
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uint32_t SoftwareSerial::cur_speed = 0; |
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void SoftwareSerial::setInterruptPriority(uint32_t preemptPriority, uint32_t subPriority) { |
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timer_interrupt_priority = NVIC_EncodePriority(NVIC_GetPriorityGrouping(), preemptPriority, subPriority); |
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} |
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//
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// Private methods
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//
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void SoftwareSerial::setSpeed(uint32_t speed) { |
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if (speed != cur_speed) { |
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timer.pause(); |
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if (speed != 0) { |
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// Disable the timer
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uint32_t clock_rate, cmp_value; |
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// Get timer clock
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clock_rate = timer.getTimerClkFreq(); |
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int pre = 1; |
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// Calculate prescale an compare value
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do { |
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cmp_value = clock_rate / (speed * OVERSAMPLE); |
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if (cmp_value >= UINT16_MAX) { |
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clock_rate /= 2; |
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pre *= 2; |
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} |
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} while (cmp_value >= UINT16_MAX); |
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timer.setPrescaleFactor(pre); |
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timer.setOverflow(cmp_value); |
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timer.setCount(0); |
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timer.attachInterrupt(&handleInterrupt); |
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timer.resume(); |
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NVIC_SetPriority(timer_interrupt_number, timer_interrupt_priority); |
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} |
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else |
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timer.detachInterrupt(); |
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cur_speed = speed; |
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} |
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} |
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// This function sets the current object as the "listening"
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// one and returns true if it replaces another
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bool SoftwareSerial::listen() { |
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if (active_listener != this) { |
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// wait for any transmit to complete as we may change speed
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while (active_out); |
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active_listener->stopListening(); |
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rx_tick_cnt = 1; // 1 : next interrupt will decrease rx_tick_cnt to 0 which means RX pin level will be considered.
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rx_bit_cnt = -1; // rx_bit_cnt = -1 : waiting for start bit
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setSpeed(_speed); |
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active_listener = this; |
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if (!_half_duplex) active_in = this; |
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return true; |
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} |
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return false; |
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} |
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// Stop listening. Returns true if we were actually listening.
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bool SoftwareSerial::stopListening() { |
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if (active_listener == this) { |
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// wait for any output to complete
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while (active_out); |
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if (_half_duplex) setRXTX(false); |
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active_listener = nullptr; |
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active_in = nullptr; |
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// turn off ints
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setSpeed(0); |
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return true; |
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} |
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return false; |
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} |
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inline void SoftwareSerial::setTX() { |
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if (_inverse_logic) |
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LL_GPIO_ResetOutputPin(_transmitPinPort, _transmitPinNumber); |
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else |
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LL_GPIO_SetOutputPin(_transmitPinPort, _transmitPinNumber); |
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pinMode(_transmitPin, OUTPUT); |
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} |
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inline void SoftwareSerial::setRX() { |
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pinMode(_receivePin, _inverse_logic ? INPUT_PULLDOWN : INPUT_PULLUP); // pullup for normal logic!
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} |
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inline void SoftwareSerial::setRXTX(bool input) { |
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if (_half_duplex) { |
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if (input) { |
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if (active_in != this) { |
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setRX(); |
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rx_bit_cnt = -1; // rx_bit_cnt = -1 : waiting for start bit
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rx_tick_cnt = 2; // 2 : next interrupt will be discarded. 2 interrupts required to consider RX pin level
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active_in = this; |
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} |
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} |
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else { |
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if (active_in == this) { |
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setTX(); |
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active_in = nullptr; |
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} |
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} |
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} |
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} |
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inline void SoftwareSerial::send() { |
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if (--tx_tick_cnt <= 0) { // if tx_tick_cnt > 0 interrupt is discarded. Only when tx_tick_cnt reaches 0 is TX pin set.
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if (tx_bit_cnt++ < 10) { // tx_bit_cnt < 10 transmission is not finished (10 = 1 start +8 bits + 1 stop)
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// Send data (including start and stop bits)
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if (tx_buffer & 1) |
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LL_GPIO_SetOutputPin(_transmitPinPort, _transmitPinNumber); |
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else |
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LL_GPIO_ResetOutputPin(_transmitPinPort, _transmitPinNumber); |
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tx_buffer >>= 1; |
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tx_tick_cnt = OVERSAMPLE; // Wait OVERSAMPLE ticks to send next bit
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} |
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else { // Transmission finished
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tx_tick_cnt = 1; |
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if (_output_pending) { |
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active_out = nullptr; |
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// In half-duplex mode wait HALFDUPLEX_SWITCH_DELAY bit-periods after the byte has
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// been transmitted before allowing the switch to RX mode
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} |
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else if (tx_bit_cnt > 10 + OVERSAMPLE * HALFDUPLEX_SWITCH_DELAY) { |
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if (_half_duplex && active_listener == this) setRXTX(true); |
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active_out = nullptr; |
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} |
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} |
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} |
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} |
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//
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// The receive routine called by the interrupt handler
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//
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inline void SoftwareSerial::recv() { |
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if (--rx_tick_cnt <= 0) { // if rx_tick_cnt > 0 interrupt is discarded. Only when rx_tick_cnt reaches 0 is RX pin considered
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bool inbit = LL_GPIO_IsInputPinSet(_receivePinPort, _receivePinNumber) ^ _inverse_logic; |
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if (rx_bit_cnt == -1) { // rx_bit_cnt = -1 : waiting for start bit
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if (!inbit) { |
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// got start bit
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rx_bit_cnt = 0; // rx_bit_cnt == 0 : start bit received
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rx_tick_cnt = OVERSAMPLE + 1; // Wait 1 bit (OVERSAMPLE ticks) + 1 tick in order to sample RX pin in the middle of the edge (and not too close to the edge)
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rx_buffer = 0; |
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} |
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else |
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rx_tick_cnt = 1; // Waiting for start bit, but wrong level. Wait for next Interrupt to check RX pin level
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} |
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else if (rx_bit_cnt >= 8) { // rx_bit_cnt >= 8 : waiting for stop bit
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if (inbit) { |
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// Stop-bit read complete. Add to buffer.
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uint8_t next = (_receive_buffer_tail + 1) % _SS_MAX_RX_BUFF; |
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if (next != _receive_buffer_head) { |
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// save new data in buffer: tail points to byte destination
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_receive_buffer[_receive_buffer_tail] = rx_buffer; // save new byte
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_receive_buffer_tail = next; |
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} |
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else // rx_bit_cnt = x with x = [0..7] correspond to new bit x received
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_buffer_overflow = true; |
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} |
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// Full trame received. Restart waiting for start bit at next interrupt
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rx_tick_cnt = 1; |
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rx_bit_cnt = -1; |
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} |
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else { |
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// data bits
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rx_buffer >>= 1; |
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if (inbit) rx_buffer |= 0x80; |
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rx_bit_cnt++; // Prepare for next bit
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rx_tick_cnt = OVERSAMPLE; // Wait OVERSAMPLE ticks before sampling next bit
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} |
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} |
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} |
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//
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// Interrupt handling
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//
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/* static */ |
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inline void SoftwareSerial::handleInterrupt(HardwareTimer*) { |
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if (active_in) active_in->recv(); |
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if (active_out) active_out->send(); |
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} |
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//
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// Constructor
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//
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SoftwareSerial::SoftwareSerial(uint16_t receivePin, uint16_t transmitPin, bool inverse_logic /* = false */) : |
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_receivePin(receivePin), |
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_transmitPin(transmitPin), |
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_receivePinPort(digitalPinToPort(receivePin)), |
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_receivePinNumber(STM_LL_GPIO_PIN(digitalPinToPinName(receivePin))), |
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_transmitPinPort(digitalPinToPort(transmitPin)), |
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_transmitPinNumber(STM_LL_GPIO_PIN(digitalPinToPinName(transmitPin))), |
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_speed(0), |
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_buffer_overflow(false), |
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_inverse_logic(inverse_logic), |
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_half_duplex(receivePin == transmitPin), |
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_output_pending(0), |
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_receive_buffer_tail(0), |
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_receive_buffer_head(0) |
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{ |
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if ((receivePin < NUM_DIGITAL_PINS) || (transmitPin < NUM_DIGITAL_PINS)) { |
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/* Enable GPIO clock for tx and rx pin*/ |
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set_GPIO_Port_Clock(STM_PORT(digitalPinToPinName(transmitPin))); |
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set_GPIO_Port_Clock(STM_PORT(digitalPinToPinName(receivePin))); |
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} |
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else |
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_Error_Handler("ERROR: invalid pin number\n", -1); |
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} |
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//
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// Destructor
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//
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SoftwareSerial::~SoftwareSerial() { end(); } |
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//
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// Public methods
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//
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void SoftwareSerial::begin(long speed) { |
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#ifdef FORCE_BAUD_RATE |
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speed = FORCE_BAUD_RATE; |
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#endif |
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_speed = speed; |
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if (!_half_duplex) { |
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setTX(); |
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setRX(); |
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listen(); |
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} |
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else |
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setTX(); |
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} |
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void SoftwareSerial::end() { |
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stopListening(); |
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} |
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// Read data from buffer
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int SoftwareSerial::read() { |
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// Empty buffer?
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if (_receive_buffer_head == _receive_buffer_tail) return -1; |
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// Read from "head"
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uint8_t d = _receive_buffer[_receive_buffer_head]; // grab next byte
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_receive_buffer_head = (_receive_buffer_head + 1) % _SS_MAX_RX_BUFF; |
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return d; |
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} |
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int SoftwareSerial::available() { |
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return (_receive_buffer_tail + _SS_MAX_RX_BUFF - _receive_buffer_head) % _SS_MAX_RX_BUFF; |
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} |
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size_t SoftwareSerial::write(uint8_t b) { |
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// wait for previous transmit to complete
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_output_pending = 1; |
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while (active_out) { /* nada */ } |
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// add start and stop bits.
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tx_buffer = b << 1 | 0x200; |
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if (_inverse_logic) tx_buffer = ~tx_buffer; |
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tx_bit_cnt = 0; |
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tx_tick_cnt = OVERSAMPLE; |
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setSpeed(_speed); |
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if (_half_duplex) setRXTX(false); |
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_output_pending = 0; |
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// make us active
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active_out = this; |
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return 1; |
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} |
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void SoftwareSerial::flush() { |
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noInterrupts(); |
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_receive_buffer_head = _receive_buffer_tail = 0; |
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interrupts(); |
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} |
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int SoftwareSerial::peek() { |
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// Empty buffer?
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if (_receive_buffer_head == _receive_buffer_tail) return -1; |
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// Read from "head"
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return _receive_buffer[_receive_buffer_head]; |
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} |
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@ -0,0 +1,119 @@ |
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/**
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* SoftwareSerial.h (formerly NewSoftSerial.h) |
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* |
|||
* Multi-instance software serial library for Arduino/Wiring |
|||
* -- Interrupt-driven receive and other improvements by ladyada |
|||
* (http://ladyada.net)
|
|||
* -- Tuning, circular buffer, derivation from class Print/Stream, |
|||
* multi-instance support, porting to 8MHz processors, |
|||
* various optimizations, PROGMEM delay tables, inverse logic and |
|||
* direct port writing by Mikal Hart (http://www.arduiniana.org)
|
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* -- Pin change interrupt macros by Paul Stoffregen (http://www.pjrc.com)
|
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* -- 20MHz processor support by Garrett Mace (http://www.macetech.com)
|
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* -- ATmega1280/2560 support by Brett Hagman (http://www.roguerobotics.com/)
|
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* |
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* This library is free software; you can redistribute it and/or |
|||
* modify it under the terms of the GNU Lesser General Public |
|||
* License as published by the Free Software Foundation; either |
|||
* version 2.1 of the License, or (at your option) any later version. |
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* |
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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 |
|||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
|||
* Lesser General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public |
|||
* License along with this library; if not, write to the Free Software |
|||
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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* |
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* The latest version of this library can always be found at |
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* http://arduiniana.org.
|
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*/ |
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#ifndef SOFTWARESERIAL_H |
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#define SOFTWARESERIAL_H |
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#include <Arduino.h> |
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/******************************************************************************
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* Definitions |
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******************************************************************************/ |
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#define _SS_MAX_RX_BUFF 64 // RX buffer size
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class SoftwareSerial : public Stream { |
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private: |
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// per object data
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uint16_t _receivePin; |
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uint16_t _transmitPin; |
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GPIO_TypeDef *_receivePinPort; |
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uint32_t _receivePinNumber; |
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GPIO_TypeDef *_transmitPinPort; |
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uint32_t _transmitPinNumber; |
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uint32_t _speed; |
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uint16_t _buffer_overflow: 1; |
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uint16_t _inverse_logic: 1; |
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uint16_t _half_duplex: 1; |
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uint16_t _output_pending: 1; |
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unsigned char _receive_buffer[_SS_MAX_RX_BUFF]; |
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volatile uint8_t _receive_buffer_tail; |
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volatile uint8_t _receive_buffer_head; |
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uint32_t delta_start = 0; |
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// static data
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static bool initialised; |
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static HardwareTimer timer; |
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static const IRQn_Type timer_interrupt_number; |
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static uint32_t timer_interrupt_priority; |
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static SoftwareSerial *active_listener; |
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static SoftwareSerial *volatile active_out; |
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static SoftwareSerial *volatile active_in; |
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static int32_t tx_tick_cnt; |
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static volatile int32_t rx_tick_cnt; |
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static uint32_t tx_buffer; |
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static int32_t tx_bit_cnt; |
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static uint32_t rx_buffer; |
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static int32_t rx_bit_cnt; |
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static uint32_t cur_speed; |
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// private methods
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void send(); |
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void recv(); |
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void setTX(); |
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void setRX(); |
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void setSpeed(uint32_t speed); |
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void setRXTX(bool input); |
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static void handleInterrupt(HardwareTimer *timer); |
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public: |
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// public methods
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SoftwareSerial(uint16_t receivePin, uint16_t transmitPin, bool inverse_logic = false); |
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virtual ~SoftwareSerial(); |
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void begin(long speed); |
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bool listen(); |
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void end(); |
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bool isListening() { return active_listener == this; } |
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bool stopListening(); |
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bool overflow() { |
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bool ret = _buffer_overflow; |
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if (ret) _buffer_overflow = false; |
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return ret; |
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} |
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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 true; } |
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static void setInterruptPriority(uint32_t preemptPriority, uint32_t subPriority); |
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|
|||
using Print::write; |
|||
}; |
|||
|
|||
#endif // SOFTWARESERIAL_H
|
|||
@ -1,29 +0,0 @@ |
|||
import os,shutil |
|||
from SCons.Script import DefaultEnvironment |
|||
from platformio import util |
|||
|
|||
env = DefaultEnvironment() |
|||
platform = env.PioPlatform() |
|||
board = env.BoardConfig() |
|||
|
|||
FRAMEWORK_DIR = platform.get_package_dir("framework-arduinoststm32") |
|||
CMSIS_DIR = os.path.join(FRAMEWORK_DIR, "CMSIS", "CMSIS") |
|||
assert os.path.isdir(FRAMEWORK_DIR) |
|||
assert os.path.isdir(CMSIS_DIR) |
|||
assert os.path.isdir("buildroot/share/PlatformIO/variants") |
|||
|
|||
mcu_type = board.get("build.mcu")[:-2] |
|||
variant = board.get("build.variant") |
|||
series = mcu_type[:7].upper() + "xx" |
|||
variant_dir = os.path.join(FRAMEWORK_DIR, "variants", variant) |
|||
|
|||
source_dir = os.path.join("buildroot/share/PlatformIO/variants", variant) |
|||
assert os.path.isdir(source_dir) |
|||
|
|||
if not os.path.isdir(variant_dir): |
|||
os.mkdir(variant_dir) |
|||
|
|||
for file_name in os.listdir(source_dir): |
|||
full_file_name = os.path.join(source_dir, file_name) |
|||
if os.path.isfile(full_file_name): |
|||
shutil.copy(full_file_name, variant_dir) |
|||
@ -0,0 +1,52 @@ |
|||
#pragma once |
|||
|
|||
#define HAL_MODULE_ENABLED |
|||
#define HAL_ADC_MODULE_ENABLED |
|||
#define HAL_CRC_MODULE_ENABLED |
|||
#define HAL_DMA_MODULE_ENABLED |
|||
#define HAL_GPIO_MODULE_ENABLED |
|||
#define HAL_I2C_MODULE_ENABLED |
|||
#define HAL_PWR_MODULE_ENABLED |
|||
#define HAL_RCC_MODULE_ENABLED |
|||
//#define HAL_RTC_MODULE_ENABLED Real Time Clock...do we use it?
|
|||
#define HAL_SPI_MODULE_ENABLED |
|||
#define HAL_TIM_MODULE_ENABLED |
|||
#define HAL_USART_MODULE_ENABLED |
|||
#define HAL_CORTEX_MODULE_ENABLED |
|||
//#define HAL_UART_MODULE_ENABLED // by default
|
|||
//#define HAL_PCD_MODULE_ENABLED // Since STM32 v3.10700.191028 this is automatically added if any type of USB is enabled (as in Arduino IDE)
|
|||
|
|||
#undef HAL_SD_MODULE_ENABLED |
|||
#undef HAL_DAC_MODULE_ENABLED |
|||
#undef HAL_FLASH_MODULE_ENABLED |
|||
#undef HAL_CAN_MODULE_ENABLED |
|||
#undef HAL_CAN_LEGACY_MODULE_ENABLED |
|||
#undef HAL_CEC_MODULE_ENABLED |
|||
#undef HAL_CRYP_MODULE_ENABLED |
|||
#undef HAL_DCMI_MODULE_ENABLED |
|||
#undef HAL_DMA2D_MODULE_ENABLED |
|||
#undef HAL_ETH_MODULE_ENABLED |
|||
#undef HAL_NAND_MODULE_ENABLED |
|||
#undef HAL_NOR_MODULE_ENABLED |
|||
#undef HAL_PCCARD_MODULE_ENABLED |
|||
#undef HAL_SRAM_MODULE_ENABLED |
|||
#undef HAL_SDRAM_MODULE_ENABLED |
|||
#undef HAL_HASH_MODULE_ENABLED |
|||
#undef HAL_EXTI_MODULE_ENABLED |
|||
#undef HAL_SMBUS_MODULE_ENABLED |
|||
#undef HAL_I2S_MODULE_ENABLED |
|||
#undef HAL_IWDG_MODULE_ENABLED |
|||
#undef HAL_LTDC_MODULE_ENABLED |
|||
#undef HAL_DSI_MODULE_ENABLED |
|||
#undef HAL_QSPI_MODULE_ENABLED |
|||
#undef HAL_RNG_MODULE_ENABLED |
|||
#undef HAL_SAI_MODULE_ENABLED |
|||
#undef HAL_IRDA_MODULE_ENABLED |
|||
#undef HAL_SMARTCARD_MODULE_ENABLED |
|||
#undef HAL_WWDG_MODULE_ENABLED |
|||
#undef HAL_HCD_MODULE_ENABLED |
|||
#undef HAL_FMPI2C_MODULE_ENABLED |
|||
#undef HAL_SPDIFRX_MODULE_ENABLED |
|||
#undef HAL_DFSDM_MODULE_ENABLED |
|||
#undef HAL_LPTIM_MODULE_ENABLED |
|||
#undef HAL_MMC_MODULE_ENABLED |
|||
Loading…
Reference in new issue