New HardwareTimer for STM32 5.7.0 (#15655)
Lino Barreca
5 years ago
committed by
Scott Lahteine
parent
4762dfe797
commit
ac71cdc265
@ -0,0 +1,391 @@
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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)
|
||||
* -- Pin change interrupt macros by Paul Stoffregen (http://www.pjrc.com)
|
||||
* -- 20MHz processor support by Garrett Mace (http://www.macetech.com)
|
||||
* -- ATmega1280/2560 support by Brett Hagman (http://www.roguerobotics.com/)
|
||||
*
|
||||
* 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.
|
||||
*
|
||||
* This library is distributed in the hope that it will be useful,
|
||||
* 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.
|
||||
*
|
||||
* 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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* The latest version of this library can always be found at
|
||||
* http://arduiniana.org.
|
||||
*/
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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
|
||||
static bool initialised;
|
||||
static HardwareTimer timer;
|
||||
static const IRQn_Type timer_interrupt_number;
|
||||
static uint32_t timer_interrupt_priority;
|
||||
static SoftwareSerial *active_listener;
|
||||
static SoftwareSerial *volatile active_out;
|
||||
static SoftwareSerial *volatile active_in;
|
||||
static int32_t tx_tick_cnt;
|
||||
static volatile int32_t rx_tick_cnt;
|
||||
static uint32_t tx_buffer;
|
||||
static int32_t tx_bit_cnt;
|
||||
static uint32_t rx_buffer;
|
||||
static int32_t rx_bit_cnt;
|
||||
static uint32_t cur_speed;
|
||||
|
||||
// private methods
|
||||
void send();
|
||||
void recv();
|
||||
void setTX();
|
||||
void setRX();
|
||||
void setSpeed(uint32_t speed);
|
||||
void setRXTX(bool input);
|
||||
static void handleInterrupt(HardwareTimer *timer);
|
||||
|
||||
public:
|
||||
// public methods
|
||||
|
||||
SoftwareSerial(uint16_t receivePin, uint16_t transmitPin, bool inverse_logic = false);
|
||||
virtual ~SoftwareSerial();
|
||||
void begin(long speed);
|
||||
bool listen();
|
||||
void end();
|
||||
bool isListening() { return active_listener == this; }
|
||||
bool stopListening();
|
||||
bool overflow() {
|
||||
bool ret = _buffer_overflow;
|
||||
if (ret) _buffer_overflow = false;
|
||||
return ret;
|
||||
}
|
||||
int peek();
|
||||
|
||||
virtual size_t write(uint8_t byte);
|
||||
virtual int read();
|
||||
virtual int available();
|
||||
virtual void flush();
|
||||
operator bool() { return true; }
|
||||
|
||||
static void setInterruptPriority(uint32_t preemptPriority, uint32_t subPriority);
|
||||
|
||||
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