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libraries/AltSoftSerial/AltSoftSerial.cpp Normal file
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/* An Alternative Software Serial Library
* http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html
* Copyright (c) 2014 PJRC.COM, LLC, Paul Stoffregen, paul@pjrc.com
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
// Revisions are now tracked on GitHub
// https://github.com/PaulStoffregen/AltSoftSerial
//
// Version 1.2: Support Teensy 3.x
//
// Version 1.1: Improve performance in receiver code
//
// Version 1.0: Initial Release
#include "AltSoftSerial.h"
#include "config/AltSoftSerial_Boards.h"
#include "config/AltSoftSerial_Timers.h"
/****************************************/
/** Initialization **/
/****************************************/
static uint16_t ticks_per_bit=0;
bool AltSoftSerial::timing_error=false;
static uint8_t rx_state;
static uint8_t rx_byte;
static uint8_t rx_bit = 0;
static uint16_t rx_target;
static uint16_t rx_stop_ticks=0;
static volatile uint8_t rx_buffer_head;
static volatile uint8_t rx_buffer_tail;
#define RX_BUFFER_SIZE 80
static volatile uint8_t rx_buffer[RX_BUFFER_SIZE];
static volatile uint8_t tx_state=0;
static uint8_t tx_byte;
static uint8_t tx_bit;
static volatile uint8_t tx_buffer_head;
static volatile uint8_t tx_buffer_tail;
#define TX_BUFFER_SIZE 68
static volatile uint8_t tx_buffer[TX_BUFFER_SIZE];
#ifndef INPUT_PULLUP
#define INPUT_PULLUP INPUT
#endif
#define MAX_COUNTS_PER_BIT 6241 // 65536 / 10.5
void AltSoftSerial::init(uint32_t cycles_per_bit)
{
//Serial.printf("cycles_per_bit = %d\n", cycles_per_bit);
if (cycles_per_bit < MAX_COUNTS_PER_BIT) {
CONFIG_TIMER_NOPRESCALE();
} else {
cycles_per_bit /= 8;
//Serial.printf("cycles_per_bit/8 = %d\n", cycles_per_bit);
if (cycles_per_bit < MAX_COUNTS_PER_BIT) {
CONFIG_TIMER_PRESCALE_8();
} else {
#if defined(CONFIG_TIMER_PRESCALE_256)
cycles_per_bit /= 32;
//Serial.printf("cycles_per_bit/256 = %d\n", cycles_per_bit);
if (cycles_per_bit < MAX_COUNTS_PER_BIT) {
CONFIG_TIMER_PRESCALE_256();
} else {
return; // baud rate too low for AltSoftSerial
}
#elif defined(CONFIG_TIMER_PRESCALE_128)
cycles_per_bit /= 16;
//Serial.printf("cycles_per_bit/128 = %d\n", cycles_per_bit);
if (cycles_per_bit < MAX_COUNTS_PER_BIT) {
CONFIG_TIMER_PRESCALE_128();
} else {
return; // baud rate too low for AltSoftSerial
}
#else
return; // baud rate too low for AltSoftSerial
#endif
}
}
ticks_per_bit = cycles_per_bit;
rx_stop_ticks = cycles_per_bit * 37 / 4;
pinMode(INPUT_CAPTURE_PIN, INPUT_PULLUP);
digitalWrite(OUTPUT_COMPARE_A_PIN, HIGH);
pinMode(OUTPUT_COMPARE_A_PIN, OUTPUT);
rx_state = 0;
rx_buffer_head = 0;
rx_buffer_tail = 0;
tx_state = 0;
tx_buffer_head = 0;
tx_buffer_tail = 0;
ENABLE_INT_INPUT_CAPTURE();
}
void AltSoftSerial::end(void)
{
DISABLE_INT_COMPARE_B();
DISABLE_INT_INPUT_CAPTURE();
flushInput();
flushOutput();
DISABLE_INT_COMPARE_A();
// TODO: restore timer to original settings?
}
/****************************************/
/** Transmission **/
/****************************************/
void AltSoftSerial::writeByte(uint8_t b)
{
uint8_t intr_state, head;
head = tx_buffer_head + 1;
if (head >= TX_BUFFER_SIZE) head = 0;
while (tx_buffer_tail == head) ; // wait until space in buffer
intr_state = SREG;
cli();
if (tx_state) {
tx_buffer[head] = b;
tx_buffer_head = head;
} else {
tx_state = 1;
tx_byte = b;
tx_bit = 0;
ENABLE_INT_COMPARE_A();
CONFIG_MATCH_CLEAR();
SET_COMPARE_A(GET_TIMER_COUNT() + 16);
}
SREG = intr_state;
}
ISR(COMPARE_A_INTERRUPT)
{
uint8_t state, byte, bit, head, tail;
uint16_t target;
state = tx_state;
byte = tx_byte;
target = GET_COMPARE_A();
while (state < 10) {
target += ticks_per_bit;
if (state < 9)
bit = byte & 1;
else
bit = 1; // stopbit
byte >>= 1;
state++;
if (bit != tx_bit) {
if (bit) {
CONFIG_MATCH_SET();
} else {
CONFIG_MATCH_CLEAR();
}
SET_COMPARE_A(target);
tx_bit = bit;
tx_byte = byte;
tx_state = state;
// TODO: how to detect timing_error?
return;
}
}
head = tx_buffer_head;
tail = tx_buffer_tail;
if (head == tail) {
if (state == 10) {
// Wait for final stop bit to finish
tx_state = 11;
SET_COMPARE_A(target + ticks_per_bit);
} else {
tx_state = 0;
CONFIG_MATCH_NORMAL();
DISABLE_INT_COMPARE_A();
}
} else {
if (++tail >= TX_BUFFER_SIZE) tail = 0;
tx_buffer_tail = tail;
tx_byte = tx_buffer[tail];
tx_bit = 0;
CONFIG_MATCH_CLEAR();
if (state == 10)
SET_COMPARE_A(target + ticks_per_bit);
else
SET_COMPARE_A(GET_TIMER_COUNT() + 16);
tx_state = 1;
// TODO: how to detect timing_error?
}
}
void AltSoftSerial::flushOutput(void)
{
while (tx_state) /* wait */ ;
}
/****************************************/
/** Reception **/
/****************************************/
ISR(CAPTURE_INTERRUPT)
{
uint8_t state, bit, head;
uint16_t capture, target;
uint16_t offset, offset_overflow;
capture = GET_INPUT_CAPTURE();
bit = rx_bit;
if (bit) {
CONFIG_CAPTURE_FALLING_EDGE();
rx_bit = 0;
} else {
CONFIG_CAPTURE_RISING_EDGE();
rx_bit = 0x80;
}
state = rx_state;
if (state == 0) {
if (!bit) {
uint16_t end = capture + rx_stop_ticks;
SET_COMPARE_B(end);
ENABLE_INT_COMPARE_B();
rx_target = capture + ticks_per_bit + ticks_per_bit/2;
rx_state = 1;
}
} else {
target = rx_target;
offset_overflow = 65535 - ticks_per_bit;
while (1) {
offset = capture - target;
if (offset > offset_overflow) break;
rx_byte = (rx_byte >> 1) | rx_bit;
target += ticks_per_bit;
state++;
if (state >= 9) {
DISABLE_INT_COMPARE_B();
head = rx_buffer_head + 1;
if (head >= RX_BUFFER_SIZE) head = 0;
if (head != rx_buffer_tail) {
rx_buffer[head] = rx_byte;
rx_buffer_head = head;
}
CONFIG_CAPTURE_FALLING_EDGE();
rx_bit = 0;
rx_state = 0;
return;
}
}
rx_target = target;
rx_state = state;
}
//if (GET_TIMER_COUNT() - capture > ticks_per_bit) AltSoftSerial::timing_error = true;
}
ISR(COMPARE_B_INTERRUPT)
{
uint8_t head, state, bit;
DISABLE_INT_COMPARE_B();
CONFIG_CAPTURE_FALLING_EDGE();
state = rx_state;
bit = rx_bit ^ 0x80;
while (state < 9) {
rx_byte = (rx_byte >> 1) | bit;
state++;
}
head = rx_buffer_head + 1;
if (head >= RX_BUFFER_SIZE) head = 0;
if (head != rx_buffer_tail) {
rx_buffer[head] = rx_byte;
rx_buffer_head = head;
}
rx_state = 0;
CONFIG_CAPTURE_FALLING_EDGE();
rx_bit = 0;
}
int AltSoftSerial::read(void)
{
uint8_t head, tail, out;
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
out = rx_buffer[tail];
rx_buffer_tail = tail;
return out;
}
int AltSoftSerial::peek(void)
{
uint8_t head, tail;
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head == tail) return -1;
if (++tail >= RX_BUFFER_SIZE) tail = 0;
return rx_buffer[tail];
}
int AltSoftSerial::available(void)
{
uint8_t head, tail;
head = rx_buffer_head;
tail = rx_buffer_tail;
if (head >= tail) return head - tail;
return RX_BUFFER_SIZE + head - tail;
}
void AltSoftSerial::flushInput(void)
{
rx_buffer_head = rx_buffer_tail;
}
#ifdef ALTSS_USE_FTM0
void ftm0_isr(void)
{
uint32_t flags = FTM0_STATUS;
FTM0_STATUS = 0;
if (flags & (1<<0) && (FTM0_C0SC & 0x40)) altss_compare_b_interrupt();
if (flags & (1<<5)) altss_capture_interrupt();
if (flags & (1<<6) && (FTM0_C6SC & 0x40)) altss_compare_a_interrupt();
}
#endif

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/* An Alternative Software Serial Library
* http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html
* Copyright (c) 2014 PJRC.COM, LLC, Paul Stoffregen, paul@pjrc.com
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#ifndef AltSoftSerial_h
#define AltSoftSerial_h
#include <inttypes.h>
#if ARDUINO >= 100
#include "Arduino.h"
#else
#include "WProgram.h"
#include "pins_arduino.h"
#endif
#if defined(__arm__) && defined(CORE_TEENSY)
#define ALTSS_BASE_FREQ F_BUS
#else
#define ALTSS_BASE_FREQ F_CPU
#endif
class AltSoftSerial : public Stream
{
public:
AltSoftSerial() { }
~AltSoftSerial() { end(); }
static void begin(uint32_t baud) { init((ALTSS_BASE_FREQ + baud / 2) / baud); }
static void end();
int peek();
int read();
int available();
#if ARDUINO >= 100
size_t write(uint8_t byte) { writeByte(byte); return 1; }
void flush() { flushOutput(); }
#else
void write(uint8_t byte) { writeByte(byte); }
void flush() { flushInput(); }
#endif
using Print::write;
static void flushInput();
static void flushOutput();
// for drop-in compatibility with NewSoftSerial, rxPin & txPin ignored
AltSoftSerial(uint8_t rxPin, uint8_t txPin, bool inverse = false) { }
bool listen() { return false; }
bool isListening() { return true; }
bool overflow() { bool r = timing_error; timing_error = false; return r; }
static int library_version() { return 1; }
static void enable_timer0(bool enable) { }
static bool timing_error;
private:
static void init(uint32_t cycles_per_bit);
static void writeByte(uint8_t byte);
};
#endif

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libraries/AltSoftSerial/README.md Normal file
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#AltSoftSerial Library#
Improved software emulated serial, using hardware timers for precise signal
timing and availability of CPU time for other libraries to respond to interrupts
during data AltSoftSerial data transmission and reception.
http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html
![AltSoftSerial on Teensy 2.0](http://www.pjrc.com/teensy/td_libs_AltSoftSerial_2.jpg)

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libraries/AltSoftSerial/config/AltSoftSerial_Boards.h Normal file
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/* An Alternative Software Serial Library
* http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html
* Copyright (c) 2014 PJRC.COM, LLC, Paul Stoffregen, paul@pjrc.com
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
// Teensy 2.0
//
#if defined(__AVR_ATmega32U4__) && defined(CORE_TEENSY)
//#define ALTSS_USE_TIMER1
//#define INPUT_CAPTURE_PIN 22 // receive
//#define OUTPUT_COMPARE_A_PIN 14 // transmit
//#define OUTPUT_COMPARE_B_PIN 15 // unusable PWM
//#define OUTPUT_COMPARE_C_PIN 4 // unusable PWM
#define ALTSS_USE_TIMER3
#define INPUT_CAPTURE_PIN 10 // receive
#define OUTPUT_COMPARE_A_PIN 9 // transmit
// Teensy++ 2.0
//
#elif defined(__AVR_AT90USB1286__) && defined(CORE_TEENSY)
#define ALTSS_USE_TIMER1
#define INPUT_CAPTURE_PIN 4 // receive
#define OUTPUT_COMPARE_A_PIN 25 // transmit
#define OUTPUT_COMPARE_B_PIN 26 // unusable PWM
#define OUTPUT_COMPARE_C_PIN 27 // unusable PWM
//#define ALTSS_USE_TIMER3
//#define INPUT_CAPTURE_PIN 17 // receive
//#define OUTPUT_COMPARE_A_PIN 16 // transmit
//#define OUTPUT_COMPARE_B_PIN 15 // unusable PWM
//#define OUTPUT_COMPARE_C_PIN 14 // unusable PWM
// Teensy 3.x
//
#elif defined(__MK20DX128__) || defined(__MK20DX256__) || defined(__MK64FX512__) || defined(__MK66FX1M0__)
#define ALTSS_USE_FTM0
#define INPUT_CAPTURE_PIN 20 // receive (FTM0_CH5)
#define OUTPUT_COMPARE_A_PIN 21 // transmit (FTM0_CH6)
#define OUTPUT_COMPARE_B_PIN 22 // unusable PWM (FTM0_CH0)
#define OUTPUT_COMPARE_C_PIN 23 // PWM usable fixed freq
#define OUTPUT_COMPARE_D_PIN 5 // PWM usable fixed freq
#define OUTPUT_COMPARE_E_PIN 6 // PWM usable fixed freq
#define OUTPUT_COMPARE_F_PIN 9 // PWM usable fixed freq
#define OUTPUT_COMPARE_G_PIN 10 // PWM usable fixed freq
// Wiring-S
//
#elif defined(__AVR_ATmega644P__) && defined(WIRING)
#define ALTSS_USE_TIMER1
#define INPUT_CAPTURE_PIN 6 // receive
#define OUTPUT_COMPARE_A_PIN 5 // transmit
#define OUTPUT_COMPARE_B_PIN 4 // unusable PWM
// Arduino Uno, Duemilanove, LilyPad, etc
//
#elif defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
#define ALTSS_USE_TIMER1
#define INPUT_CAPTURE_PIN 8 // receive
#define OUTPUT_COMPARE_A_PIN 9 // transmit
#define OUTPUT_COMPARE_B_PIN 10 // unusable PWM
// Arduino Leonardo & Yun (from Cristian Maglie)
//
#elif defined(ARDUINO_AVR_YUN) || defined(ARDUINO_AVR_LEONARDO) || defined(__AVR_ATmega32U4__)
//#define ALTSS_USE_TIMER1
//#define INPUT_CAPTURE_PIN 4 // receive
//#define OUTPUT_COMPARE_A_PIN 9 // transmit
//#define OUTPUT_COMPARE_B_PIN 10 // unusable PWM
//#define OUTPUT_COMPARE_C_PIN 11 // unusable PWM
#define ALTSS_USE_TIMER3
#define INPUT_CAPTURE_PIN 13 // receive
#define OUTPUT_COMPARE_A_PIN 5 // transmit
// Arduino Mega
//
#elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
//#define ALTSS_USE_TIMER4
//#define INPUT_CAPTURE_PIN 49 // receive
//#define OUTPUT_COMPARE_A_PIN 6 // transmit
//#define OUTPUT_COMPARE_B_PIN 7 // unusable PWM
//#define OUTPUT_COMPARE_C_PIN 8 // unusable PWM
#define ALTSS_USE_TIMER5
#define INPUT_CAPTURE_PIN 48 // receive
#define OUTPUT_COMPARE_A_PIN 46 // transmit
#define OUTPUT_COMPARE_B_PIN 45 // unusable PWM
#define OUTPUT_COMPARE_C_PIN 44 // unusable PWM
// Sanguino
#elif defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644__)
#define ALTSS_USE_TIMER1
#define INPUT_CAPTURE_PIN 14 // receive
#define OUTPUT_COMPARE_A_PIN 13 // transmit
#define OUTPUT_COMPARE_B_PIN 12 // unusable PWM
// Unknown board
#else
#error "Please define your board timer and pins"
#endif

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/* An Alternative Software Serial Library
* http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html
* Copyright (c) 2014 PJRC.COM, LLC, Paul Stoffregen, paul@pjrc.com
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#if defined(ALTSS_USE_TIMER1)
#define CONFIG_TIMER_NOPRESCALE() (TIMSK1 = 0, TCCR1A = 0, TCCR1B = (1<<ICNC1) | (1<<CS10))
#define CONFIG_TIMER_PRESCALE_8() (TIMSK1 = 0, TCCR1A = 0, TCCR1B = (1<<ICNC1) | (1<<CS11))
#define CONFIG_TIMER_PRESCALE_256() (TIMSK1 = 0, TCCR1A = 0, TCCR1B = (1<<ICNC1) | (1<<CS12))
#define CONFIG_MATCH_NORMAL() (TCCR1A = TCCR1A & ~((1<<COM1A1) | (1<<COM1A0)))
#define CONFIG_MATCH_TOGGLE() (TCCR1A = (TCCR1A & ~(1<<COM1A1)) | (1<<COM1A0))
#define CONFIG_MATCH_CLEAR() (TCCR1A = (TCCR1A | (1<<COM1A1)) & ~(1<<COM1A0))
#define CONFIG_MATCH_SET() (TCCR1A = TCCR1A | ((1<<COM1A1) | (1<<COM1A0)))
#define CONFIG_CAPTURE_FALLING_EDGE() (TCCR1B &= ~(1<<ICES1))
#define CONFIG_CAPTURE_RISING_EDGE() (TCCR1B |= (1<<ICES1))
#define ENABLE_INT_INPUT_CAPTURE() (TIFR1 = (1<<ICF1), TIMSK1 = (1<<ICIE1))
#define ENABLE_INT_COMPARE_A() (TIFR1 = (1<<OCF1A), TIMSK1 |= (1<<OCIE1A))
#define ENABLE_INT_COMPARE_B() (TIFR1 = (1<<OCF1B), TIMSK1 |= (1<<OCIE1B))
#define DISABLE_INT_INPUT_CAPTURE() (TIMSK1 &= ~(1<<ICIE1))
#define DISABLE_INT_COMPARE_A() (TIMSK1 &= ~(1<<OCIE1A))
#define DISABLE_INT_COMPARE_B() (TIMSK1 &= ~(1<<OCIE1B))
#define GET_TIMER_COUNT() (TCNT1)
#define GET_INPUT_CAPTURE() (ICR1)
#define GET_COMPARE_A() (OCR1A)
#define GET_COMPARE_B() (OCR1B)
#define SET_COMPARE_A(val) (OCR1A = (val))
#define SET_COMPARE_B(val) (OCR1B = (val))
#define CAPTURE_INTERRUPT TIMER1_CAPT_vect
#define COMPARE_A_INTERRUPT TIMER1_COMPA_vect
#define COMPARE_B_INTERRUPT TIMER1_COMPB_vect
#elif defined(ALTSS_USE_TIMER3)
#define CONFIG_TIMER_NOPRESCALE() (TIMSK3 = 0, TCCR3A = 0, TCCR3B = (1<<ICNC3) | (1<<CS30))
#define CONFIG_TIMER_PRESCALE_8() (TIMSK3 = 0, TCCR3A = 0, TCCR3B = (1<<ICNC3) | (1<<CS31))
#define CONFIG_TIMER_PRESCALE_256() (TIMSK3 = 0, TCCR3A = 0, TCCR3B = (1<<ICNC3) | (1<<CS32))
#define CONFIG_MATCH_NORMAL() (TCCR3A = TCCR3A & ~((1<<COM3A1) | (1<<COM3A0)))
#define CONFIG_MATCH_TOGGLE() (TCCR3A = (TCCR3A & ~(1<<COM3A1)) | (1<<COM3A0))
#define CONFIG_MATCH_CLEAR() (TCCR3A = (TCCR3A | (1<<COM3A1)) & ~(1<<COM3A0))
#define CONFIG_MATCH_SET() (TCCR3A = TCCR3A | ((1<<COM3A1) | (1<<COM3A0)))
#define CONFIG_CAPTURE_FALLING_EDGE() (TCCR3B &= ~(1<<ICES3))
#define CONFIG_CAPTURE_RISING_EDGE() (TCCR3B |= (1<<ICES3))
#define ENABLE_INT_INPUT_CAPTURE() (TIFR3 = (1<<ICF3), TIMSK3 = (1<<ICIE3))
#define ENABLE_INT_COMPARE_A() (TIFR3 = (1<<OCF3A), TIMSK3 |= (1<<OCIE3A))
#define ENABLE_INT_COMPARE_B() (TIFR3 = (1<<OCF3B), TIMSK3 |= (1<<OCIE3B))
#define DISABLE_INT_INPUT_CAPTURE() (TIMSK3 &= ~(1<<ICIE3))
#define DISABLE_INT_COMPARE_A() (TIMSK3 &= ~(1<<OCIE3A))
#define DISABLE_INT_COMPARE_B() (TIMSK3 &= ~(1<<OCIE3B))
#define GET_TIMER_COUNT() (TCNT3)
#define GET_INPUT_CAPTURE() (ICR3)
#define GET_COMPARE_A() (OCR3A)
#define GET_COMPARE_B() (OCR3B)
#define SET_COMPARE_A(val) (OCR3A = (val))
#define SET_COMPARE_B(val) (OCR3B = (val))
#define CAPTURE_INTERRUPT TIMER3_CAPT_vect
#define COMPARE_A_INTERRUPT TIMER3_COMPA_vect
#define COMPARE_B_INTERRUPT TIMER3_COMPB_vect
#elif defined(ALTSS_USE_TIMER4)
#define CONFIG_TIMER_NOPRESCALE() (TIMSK4 = 0, TCCR4A = 0, TCCR4B = (1<<ICNC4) | (1<<CS40))
#define CONFIG_TIMER_PRESCALE_8() (TIMSK4 = 0, TCCR4A = 0, TCCR4B = (1<<ICNC4) | (1<<CS41))
#define CONFIG_TIMER_PRESCALE_256() (TIMSK4 = 0, TCCR4A = 0, TCCR4B = (1<<ICNC4) | (1<<CS42))
#define CONFIG_MATCH_NORMAL() (TCCR4A = TCCR4A & ~((1<<COM4A1) | (1<<COM4A0)))
#define CONFIG_MATCH_TOGGLE() (TCCR4A = (TCCR4A & ~(1<<COM4A1)) | (1<<COM4A0))
#define CONFIG_MATCH_CLEAR() (TCCR4A = (TCCR4A | (1<<COM4A1)) & ~(1<<COM4A0))
#define CONFIG_MATCH_SET() (TCCR4A = TCCR4A | ((1<<COM4A1) | (1<<COM4A0)))
#define CONFIG_CAPTURE_FALLING_EDGE() (TCCR4B &= ~(1<<ICES4))
#define CONFIG_CAPTURE_RISING_EDGE() (TCCR4B |= (1<<ICES4))
#define ENABLE_INT_INPUT_CAPTURE() (TIFR4 = (1<<ICF4), TIMSK4 = (1<<ICIE4))
#define ENABLE_INT_COMPARE_A() (TIFR4 = (1<<OCF4A), TIMSK4 |= (1<<OCIE4A))
#define ENABLE_INT_COMPARE_B() (TIFR4 = (1<<OCF4B), TIMSK4 |= (1<<OCIE4B))
#define DISABLE_INT_INPUT_CAPTURE() (TIMSK4 &= ~(1<<ICIE4))
#define DISABLE_INT_COMPARE_A() (TIMSK4 &= ~(1<<OCIE4A))
#define DISABLE_INT_COMPARE_B() (TIMSK4 &= ~(1<<OCIE4B))
#define GET_TIMER_COUNT() (TCNT4)
#define GET_INPUT_CAPTURE() (ICR4)
#define GET_COMPARE_A() (OCR4A)
#define GET_COMPARE_B() (OCR4B)
#define SET_COMPARE_A(val) (OCR4A = (val))
#define SET_COMPARE_B(val) (OCR4B = (val))
#define CAPTURE_INTERRUPT TIMER4_CAPT_vect
#define COMPARE_A_INTERRUPT TIMER4_COMPA_vect
#define COMPARE_B_INTERRUPT TIMER4_COMPB_vect
#elif defined(ALTSS_USE_TIMER5)
#define CONFIG_TIMER_NOPRESCALE() (TIMSK5 = 0, TCCR5A = 0, TCCR5B = (1<<ICNC5) | (1<<CS50))
#define CONFIG_TIMER_PRESCALE_8() (TIMSK5 = 0, TCCR5A = 0, TCCR5B = (1<<ICNC5) | (1<<CS51))
#define CONFIG_TIMER_PRESCALE_256() (TIMSK5 = 0, TCCR5A = 0, TCCR5B = (1<<ICNC5) | (1<<CS52))
#define CONFIG_MATCH_NORMAL() (TCCR5A = TCCR5A & ~((1<<COM5A1) | (1<<COM5A0)))
#define CONFIG_MATCH_TOGGLE() (TCCR5A = (TCCR5A & ~(1<<COM5A1)) | (1<<COM5A0))
#define CONFIG_MATCH_CLEAR() (TCCR5A = (TCCR5A | (1<<COM5A1)) & ~(1<<COM5A0))
#define CONFIG_MATCH_SET() (TCCR5A = TCCR5A | ((1<<COM5A1) | (1<<COM5A0)))
#define CONFIG_CAPTURE_FALLING_EDGE() (TCCR5B &= ~(1<<ICES5))
#define CONFIG_CAPTURE_RISING_EDGE() (TCCR5B |= (1<<ICES5))
#define ENABLE_INT_INPUT_CAPTURE() (TIFR5 = (1<<ICF5), TIMSK5 = (1<<ICIE5))
#define ENABLE_INT_COMPARE_A() (TIFR5 = (1<<OCF5A), TIMSK5 |= (1<<OCIE5A))
#define ENABLE_INT_COMPARE_B() (TIFR5 = (1<<OCF5B), TIMSK5 |= (1<<OCIE5B))
#define DISABLE_INT_INPUT_CAPTURE() (TIMSK5 &= ~(1<<ICIE5))
#define DISABLE_INT_COMPARE_A() (TIMSK5 &= ~(1<<OCIE5A))
#define DISABLE_INT_COMPARE_B() (TIMSK5 &= ~(1<<OCIE5B))
#define GET_TIMER_COUNT() (TCNT5)
#define GET_INPUT_CAPTURE() (ICR5)
#define GET_COMPARE_A() (OCR5A)
#define GET_COMPARE_B() (OCR5B)
#define SET_COMPARE_A(val) (OCR5A = (val))
#define SET_COMPARE_B(val) (OCR5B = (val))
#define CAPTURE_INTERRUPT TIMER5_CAPT_vect
#define COMPARE_A_INTERRUPT TIMER5_COMPA_vect
#define COMPARE_B_INTERRUPT TIMER5_COMPB_vect
#elif defined(ALTSS_USE_FTM0)
// CH5 = input capture (input, pin 20)
// CH6 = compare a (output, pin 21)
// CH0 = compare b (input timeout)
#define CONFIG_TIMER_NOPRESCALE() FTM0_SC = 0; FTM0_CNT = 0; FTM0_MOD = 0xFFFF; \
FTM0_SC = FTM_SC_CLKS(1) | FTM_SC_PS(0); \
digitalWriteFast(21, HIGH); \
NVIC_SET_PRIORITY(IRQ_FTM0, 48); \
FTM0_C0SC = 0x18; \
NVIC_ENABLE_IRQ(IRQ_FTM0);
#define CONFIG_TIMER_PRESCALE_8() FTM0_SC = 0; FTM0_CNT = 0; FTM0_MOD = 0xFFFF; \
FTM0_SC = FTM_SC_CLKS(1) | FTM_SC_PS(3); \
digitalWriteFast(21, HIGH); \
NVIC_SET_PRIORITY(IRQ_FTM0, 48); \
FTM0_C0SC = 0x18; \
NVIC_ENABLE_IRQ(IRQ_FTM0);
#define CONFIG_TIMER_PRESCALE_128() FTM0_SC = 0; FTM0_CNT = 0; FTM0_MOD = 0xFFFF; \
FTM0_SC = FTM_SC_CLKS(1) | FTM_SC_PS(7); \
digitalWriteFast(21, HIGH); \
NVIC_SET_PRIORITY(IRQ_FTM0, 48); \
FTM0_C0SC = 0x18; \
NVIC_ENABLE_IRQ(IRQ_FTM0);
#define CONFIG_MATCH_NORMAL() (FTM0_C6SC = 0)
#define CONFIG_MATCH_TOGGLE() (FTM0_C6SC = (FTM0_C6SC & 0xC3) | 0x14)
#define CONFIG_MATCH_CLEAR() (FTM0_C6SC = (FTM0_C6SC & 0xC3) | 0x18)
#define CONFIG_MATCH_SET() (FTM0_C6SC = (FTM0_C6SC & 0xC3) | 0x1C)
#define CONFIG_CAPTURE_FALLING_EDGE() (FTM0_C5SC = (FTM0_C5SC & 0xC3) | 0x08)
#define CONFIG_CAPTURE_RISING_EDGE() (FTM0_C5SC = (FTM0_C5SC & 0xC3) | 0x04)
#define ENABLE_INT_INPUT_CAPTURE() FTM0_C5SC = 0x48; \
CORE_PIN20_CONFIG = PORT_PCR_MUX(4)|PORT_PCR_PE|PORT_PCR_PS
#define ENABLE_INT_COMPARE_A() FTM0_C6SC |= 0x40; \
CORE_PIN21_CONFIG = PORT_PCR_MUX(4)|PORT_PCR_DSE|PORT_PCR_SRE
#define ENABLE_INT_COMPARE_B() (FTM0_C0SC = 0x58)
#define DISABLE_INT_INPUT_CAPTURE() FTM0_C5SC &= ~0x40; \
CORE_PIN20_CONFIG = PORT_PCR_MUX(1)|PORT_PCR_PE|PORT_PCR_PS
#define DISABLE_INT_COMPARE_A() FTM0_C6SC &= ~0x40; \
CORE_PIN21_CONFIG = PORT_PCR_MUX(1)|PORT_PCR_DSE|PORT_PCR_SRE; \
digitalWriteFast(21, HIGH)
#define DISABLE_INT_COMPARE_B() (FTM0_C0SC &= ~0x40)
#define GET_TIMER_COUNT() (FTM0_CNT)
#define GET_INPUT_CAPTURE() (FTM0_C5V)
#define GET_COMPARE_A() (FTM0_C6V)
#define GET_COMPARE_B() (FTM0_C0V)
#define SET_COMPARE_A(val) (FTM0_C6V = val)
#define SET_COMPARE_B(val) if (FTM0_C0SC & FTM_CSC_CHF) FTM0_C0SC = 0x18; \
do { FTM0_C0V = (val); } while (FTM0_C0V != (val));
#define CAPTURE_INTERRUPT altss_capture_interrupt
#define COMPARE_A_INTERRUPT altss_compare_a_interrupt
#define COMPARE_B_INTERRUPT altss_compare_b_interrupt
#ifdef ISR
#undef ISR
#endif
#define ISR(f) static void f (void)
#endif

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libraries/AltSoftSerial/examples/Echo/Echo.ino Normal file
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#include <AltSoftSerial.h>
// AltSoftSerial always uses these pins:
//
// Board Transmit Receive PWM Unusable
// ----- -------- ------- ------------
// Teensy 3.0 & 3.1 21 20 22
// Teensy 2.0 9 10 (none)
// Teensy++ 2.0 25 4 26, 27
// Arduino Uno 9 8 10
// Arduino Leonardo 5 13 (none)
// Arduino Mega 46 48 44, 45
// Wiring-S 5 6 4
// Sanguino 13 14 12
AltSoftSerial altSerial;
void setup() {
Serial.begin(9600);
while (!Serial) ; // wait for Arduino Serial Monitor to open
Serial.println("AltSoftSerial Test Begin");
altSerial.begin(9600);
altSerial.println("Hello World");
}
void loop() {
char c;
if (Serial.available()) {
c = Serial.read();
altSerial.print(c);
}
if (altSerial.available()) {
c = altSerial.read();
Serial.print(c);
}
}

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libraries/AltSoftSerial/examples/ReceiveTest/ReceiveTest.ino Normal file
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// AltSoftSerial Receive Test
//
// Transmit data with Serial1 and try to receive
// it with AltSoftSerial. You must connect a wire
// from Serial1 TX to AltSoftSerial RX.
#include <AltSoftSerial.h>
AltSoftSerial altser;
const int mybaud = 9600;
// Board Serial1 TX AltSoftSerial RX
// ----- ---------- ----------------
// Teensy 3.x 1 20
// Teensy 2.0 8 (D3) 10 (C7)
// Teensy++ 2.0 3 (D3) 4 (D4)
// Arduino Leonardo 1 13
// Arduino Mega 18 48
// Serial1 on AVR @ 16 MHz minimum baud is 245
// Serial1 on Teensy 3.2 @ 96 MHz minimum baud is 733
byte sentbyte;
unsigned long prevmillis;
byte testbyte=0xF0;
void setup() {
delay(200);
Serial.begin(9600);
while (!Serial) ; // wait for Arduino Serial Monitor
Serial1.begin(mybaud); // connect a wire from TX1
altser.begin(mybaud); // to AltSoftSerial RX
Serial.println("AltSoftSerial Receive Test");
prevmillis = millis();
}
void loop() {
// transmit a test byte on Serial 1
if (millis() - prevmillis > 250) {
sentbyte = testbyte++;
Serial1.write(sentbyte);
prevmillis = millis();
}
// attempt to receive it by AltSoftSerial
if (altser.available() > 0) {
byte b = altser.read();
Serial.println(b);
if (b != sentbyte) Serial.println("***** ERROR *****");
}
}

4
libraries/AltSoftSerial/keywords.txt Normal file
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AltSoftSerial KEYWORD1
active KEYWORD2
overflow KEYWORD2
library_version KEYWORD2

18
libraries/AltSoftSerial/library.json Normal file
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{
"name": "AltSoftSerial",
"frameworks": "Arduino",
"keywords": "serial",
"description": "Alternate Software Serial",
"url": "http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html",
"downloadUrl": "http://www.pjrc.com/teensy/arduino_libraries/AltSoftSerial.zip",
"authors":
{
"name": "Paul Stoffregen",
"maintainer": true
},
"repository":
{
"type": "git",
"url": "https://github.com/PaulStoffregen/AltSoftSerial"
}
}

9
libraries/AltSoftSerial/library.properties Normal file
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name=AltSoftSerial
version=1.4
author=Paul Stoffregen
maintainer=Paul Stoffregen
sentence=Software emulated serial using hardware timers for improved compatibility
paragraph=Improved software emulated serial, using hardware timers for precise signal timing and improved compatibility with other interrupt-based libraries.
category=Communication
url=http://www.pjrc.com/teensy/td_libs_AltSoftSerial.html
architectures=avr