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teemuatlut
2018-06-16 00:07:53 +03:00
parent c43793aa1e
commit 3b5dec4b13
4 changed files with 1 additions and 1 deletions
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335
Marlin/src/HAL/HAL_LPC1768/include/HardwareSerial.cpp Normal file
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/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifdef TARGET_LPC1768
#include "HardwareSerial.h"
#if SERIAL_PORT == 0 || SERIAL_PORT_2 == 0
HardwareSerial Serial = HardwareSerial(LPC_UART0);
#elif SERIAL_PORT == 1 || SERIAL_PORT_2 == 1
HardwareSerial Serial1 = HardwareSerial((LPC_UART_TypeDef *) LPC_UART1);
#elif SERIAL_PORT == 2 || SERIAL_PORT_2 == 2
HardwareSerial Serial2 = HardwareSerial(LPC_UART2);
#elif SERIAL_PORT == 3 || SERIAL_PORT_2 == 3
HardwareSerial Serial3 = HardwareSerial(LPC_UART3);
#endif
void HardwareSerial::begin(uint32_t baudrate) {
UART_CFG_Type UARTConfigStruct;
PINSEL_CFG_Type PinCfg;
UART_FIFO_CFG_Type FIFOConfig;
if (Baudrate == baudrate) return; // No need to re-initialize
if (UARTx == LPC_UART0) {
// Initialize UART0 pin connect
PinCfg.Funcnum = 1;
PinCfg.OpenDrain = 0;
PinCfg.Pinmode = 0;
PinCfg.Pinnum = 2;
PinCfg.Portnum = 0;
PINSEL_ConfigPin(&PinCfg);
PinCfg.Pinnum = 3;
PINSEL_ConfigPin(&PinCfg);
} else if ((LPC_UART1_TypeDef *) UARTx == LPC_UART1) {
// Initialize UART1 pin connect
PinCfg.Funcnum = 1;
PinCfg.OpenDrain = 0;
PinCfg.Pinmode = 0;
PinCfg.Pinnum = 15;
PinCfg.Portnum = 0;
PINSEL_ConfigPin(&PinCfg);
PinCfg.Pinnum = 16;
PINSEL_ConfigPin(&PinCfg);
} else if (UARTx == LPC_UART2) {
// Initialize UART2 pin connect
PinCfg.Funcnum = 1;
PinCfg.OpenDrain = 0;
PinCfg.Pinmode = 0;
PinCfg.Pinnum = 10;
PinCfg.Portnum = 0;
PINSEL_ConfigPin(&PinCfg);
PinCfg.Pinnum = 11;
PINSEL_ConfigPin(&PinCfg);
} else if (UARTx == LPC_UART3) {
// Initialize UART2 pin connect
PinCfg.Funcnum = 1;
PinCfg.OpenDrain = 0;
PinCfg.Pinmode = 0;
PinCfg.Pinnum = 0;
PinCfg.Portnum = 0;
PINSEL_ConfigPin(&PinCfg);
PinCfg.Pinnum = 1;
PINSEL_ConfigPin(&PinCfg);
}
/* Initialize UART Configuration parameter structure to default state:
* Baudrate = 9600bps
* 8 data bit
* 1 Stop bit
* None parity
*/
UART_ConfigStructInit(&UARTConfigStruct);
// Re-configure baudrate
UARTConfigStruct.Baud_rate = baudrate;
// Initialize eripheral with given to corresponding parameter
UART_Init(UARTx, &UARTConfigStruct);
// Enable and reset the TX and RX FIFOs
UART_FIFOConfigStructInit(&FIFOConfig);
UART_FIFOConfig(UARTx, &FIFOConfig);
// Enable UART Transmit
UART_TxCmd(UARTx, ENABLE);
// Configure Interrupts
UART_IntConfig(UARTx, UART_INTCFG_RBR, ENABLE);
UART_IntConfig(UARTx, UART_INTCFG_RLS, ENABLE);
// Set proper priority and enable interrupts
if (UARTx == LPC_UART0) {
NVIC_SetPriority(UART0_IRQn, NVIC_EncodePriority(0, 3, 0));
NVIC_EnableIRQ(UART0_IRQn);
}
else if ((LPC_UART1_TypeDef *) UARTx == LPC_UART1) {
NVIC_SetPriority(UART1_IRQn, NVIC_EncodePriority(0, 3, 0));
NVIC_EnableIRQ(UART1_IRQn);
}
else if (UARTx == LPC_UART2) {
NVIC_SetPriority(UART2_IRQn, NVIC_EncodePriority(0, 3, 0));
NVIC_EnableIRQ(UART2_IRQn);
}
else if (UARTx == LPC_UART3) {
NVIC_SetPriority(UART3_IRQn, NVIC_EncodePriority(0, 3, 0));
NVIC_EnableIRQ(UART3_IRQn);
}
RxQueueWritePos = RxQueueReadPos = 0;
#if TX_BUFFER_SIZE > 0
TxQueueWritePos = TxQueueReadPos = 0;
#endif
// Save the configured baudrate
Baudrate = baudrate;
}
int16_t HardwareSerial::peek() {
int16_t byte = -1;
// Temporarily lock out UART receive interrupts during this read so the UART receive
// interrupt won't cause problems with the index values
UART_IntConfig(UARTx, UART_INTCFG_RBR, DISABLE);
if (RxQueueReadPos != RxQueueWritePos)
byte = RxBuffer[RxQueueReadPos];
// Re-enable UART interrupts
UART_IntConfig(UARTx, UART_INTCFG_RBR, ENABLE);
return byte;
}
int16_t HardwareSerial::read() {
int16_t byte = -1;
// Temporarily lock out UART receive interrupts during this read so the UART receive
// interrupt won't cause problems with the index values
UART_IntConfig(UARTx, UART_INTCFG_RBR, DISABLE);
if (RxQueueReadPos != RxQueueWritePos) {
byte = RxBuffer[RxQueueReadPos];
RxQueueReadPos = (RxQueueReadPos + 1) % RX_BUFFER_SIZE;
}
// Re-enable UART interrupts
UART_IntConfig(UARTx, UART_INTCFG_RBR, ENABLE);
return byte;
}
size_t HardwareSerial::write(uint8_t send) {
#if TX_BUFFER_SIZE > 0
size_t bytes = 0;
uint32_t fifolvl = 0;
// If the Tx Buffer is full, wait for space to clear
if ((TxQueueWritePos+1) % TX_BUFFER_SIZE == TxQueueReadPos) flushTX();
// Temporarily lock out UART transmit interrupts during this read so the UART transmit interrupt won't
// cause problems with the index values
UART_IntConfig(UARTx, UART_INTCFG_THRE, DISABLE);
// LPC17xx.h incorrectly defines FIFOLVL as a uint8_t, when it's actually a 32-bit register
if ((LPC_UART1_TypeDef *) UARTx == LPC_UART1) {
fifolvl = *(reinterpret_cast<volatile uint32_t *>(&((LPC_UART1_TypeDef *) UARTx)->FIFOLVL));
} else fifolvl = *(reinterpret_cast<volatile uint32_t *>(&UARTx->FIFOLVL));
// If the queue is empty and there's space in the FIFO, immediately send the byte
if (TxQueueWritePos == TxQueueReadPos && fifolvl < UART_TX_FIFO_SIZE) {
bytes = UART_Send(UARTx, &send, 1, BLOCKING);
}
// Otherwiise, write the byte to the transmit buffer
else if ((TxQueueWritePos+1) % TX_BUFFER_SIZE != TxQueueReadPos) {
TxBuffer[TxQueueWritePos] = send;
TxQueueWritePos = (TxQueueWritePos+1) % TX_BUFFER_SIZE;
bytes++;
}
// Re-enable the TX Interrupt
UART_IntConfig(UARTx, UART_INTCFG_THRE, ENABLE);
return bytes;
#else
return UART_Send(UARTx, &send, 1, BLOCKING);
#endif
}
#if TX_BUFFER_SIZE > 0
void HardwareSerial::flushTX() {
// Wait for the tx buffer and FIFO to drain
while (TxQueueWritePos != TxQueueReadPos && UART_CheckBusy(UARTx) == SET);
}
#endif
size_t HardwareSerial::available() {
return (RxQueueWritePos + RX_BUFFER_SIZE - RxQueueReadPos) % RX_BUFFER_SIZE;
}
void HardwareSerial::flush() {
RxQueueWritePos = 0;
RxQueueReadPos = 0;
}
size_t HardwareSerial::printf(const char *format, ...) {
char RxBuffer[256];
va_list vArgs;
va_start(vArgs, format);
int length = vsnprintf(RxBuffer, 256, format, vArgs);
va_end(vArgs);
if (length > 0 && length < 256) {
for (size_t i = 0; i < (size_t)length; ++i)
write(RxBuffer[i]);
}
return length;
}
void HardwareSerial::IRQHandler() {
uint32_t IIRValue;
uint8_t LSRValue, byte;
IIRValue = UART_GetIntId(UARTx);
IIRValue &= UART_IIR_INTID_MASK; // check bit 1~3, interrupt identification
// Receive Line Status
if (IIRValue == UART_IIR_INTID_RLS) {
LSRValue = UART_GetLineStatus(UARTx);
// Receive Line Status
if (LSRValue & (UART_LSR_OE | UART_LSR_PE | UART_LSR_FE | UART_LSR_RXFE | UART_LSR_BI)) {
// There are errors or break interrupt
// Read LSR will clear the interrupt
Status = LSRValue;
byte = UART_ReceiveByte(UARTx); // Dummy read on RX to clear interrupt, then bail out
return;
}
}
// Receive Data Available
if (IIRValue == UART_IIR_INTID_RDA) {
// Clear the FIFO
while (UART_Receive(UARTx, &byte, 1, NONE_BLOCKING)) {
#if ENABLED(EMERGENCY_PARSER)
emergency_parser.update(emergency_state, byte);
#endif
if ((RxQueueWritePos + 1) % RX_BUFFER_SIZE != RxQueueReadPos) {
RxBuffer[RxQueueWritePos] = byte;
RxQueueWritePos = (RxQueueWritePos + 1) % RX_BUFFER_SIZE;
} else
break;
}
// Character timeout indicator
} else if (IIRValue == UART_IIR_INTID_CTI) {
// Character Time-out indicator
Status |= 0x100; // Bit 9 as the CTI error
}
#if TX_BUFFER_SIZE > 0
if (IIRValue == UART_IIR_INTID_THRE) {
// Disable THRE interrupt
UART_IntConfig(UARTx, UART_INTCFG_THRE, DISABLE);
// Wait for FIFO buffer empty
while (UART_CheckBusy(UARTx) == SET);
// Transfer up to UART_TX_FIFO_SIZE bytes of data
for (int i = 0; i < UART_TX_FIFO_SIZE && TxQueueWritePos != TxQueueReadPos; i++) {
// Move a piece of data into the transmit FIFO
if (UART_Send(UARTx, &TxBuffer[TxQueueReadPos], 1, NONE_BLOCKING)) {
TxQueueReadPos = (TxQueueReadPos+1) % TX_BUFFER_SIZE;
} else break;
}
// If there is no more data to send, disable the transmit interrupt - else enable it or keep it enabled
if (TxQueueWritePos == TxQueueReadPos) {
UART_IntConfig(UARTx, UART_INTCFG_THRE, DISABLE);
} else UART_IntConfig(UARTx, UART_INTCFG_THRE, ENABLE);
}
#endif
}
#ifdef __cplusplus
extern "C" {
#endif
void UART0_IRQHandler(void) {
#if SERIAL_PORT == 0 || SERIAL_PORT_2 == 0
Serial.IRQHandler();
#endif
}
void UART1_IRQHandler(void) {
#if SERIAL_PORT == 1 || SERIAL_PORT_2 == 1
Serial1.IRQHandler();
#endif
}
void UART2_IRQHandler(void) {
#if SERIAL_PORT == 2 || SERIAL_PORT_2 == 2
Serial2.IRQHandler();
#endif
}
void UART3_IRQHandler(void) {
#if SERIAL_PORT == 3 || SERIAL_PORT_2 == 3
Serial3.IRQHandler();
#endif
}
#ifdef __cplusplus
}
#endif
#endif // TARGET_LPC1768

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/**
* Marlin 3D Printer Firmware
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef HARDWARE_SERIAL_H_
#define HARDWARE_SERIAL_H_
#include "../../inc/MarlinConfigPre.h"
#if ENABLED(EMERGENCY_PARSER)
#include "../../feature/emergency_parser.h"
#endif
#include <stdarg.h>
#include <stdio.h>
#include <Stream.h>
extern "C" {
#include <lpc17xx_uart.h>
#include "lpc17xx_pinsel.h"
}
class HardwareSerial : public Stream {
private:
LPC_UART_TypeDef *UARTx;
uint32_t Baudrate;
uint32_t Status;
uint8_t RxBuffer[RX_BUFFER_SIZE];
uint32_t RxQueueWritePos;
uint32_t RxQueueReadPos;
#if TX_BUFFER_SIZE > 0
uint8_t TxBuffer[TX_BUFFER_SIZE];
uint32_t TxQueueWritePos;
uint32_t TxQueueReadPos;
#endif
#if ENABLED(EMERGENCY_PARSER)
EmergencyParser::State emergency_state;
#endif
public:
HardwareSerial(LPC_UART_TypeDef *UARTx)
: UARTx(UARTx)
, Baudrate(0)
, RxQueueWritePos(0)
, RxQueueReadPos(0)
#if TX_BUFFER_SIZE > 0
, TxQueueWritePos(0)
, TxQueueReadPos(0)
#endif
#if ENABLED(EMERGENCY_PARSER)
, emergency_state(EmergencyParser::State::EP_RESET)
#endif
{
}
void begin(uint32_t baudrate);
int16_t peek();
int16_t read();
size_t write(uint8_t send);
#if TX_BUFFER_SIZE > 0
void flushTX();
#endif
size_t available();
void flush();
size_t printf(const char *format, ...);
operator bool() { return true; }
void IRQHandler();
};
#endif // MARLIN_SRC_HAL_HAL_SERIAL_H_

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/*
* SoftwareSerial.cpp (formerly NewSoftSerial.cpp)
*
* 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
*
* The latest version of this library can always be found at
* http://arduiniana.org.
*/
#ifdef TARGET_LPC1768
//
// Includes
//
//#include <WInterrupts.h>
#include "../../inc/MarlinConfig.h"
#include "../Delay.h"
#include <stdint.h>
#include <stdarg.h>
#include <Arduino.h>
#include <pinmapping.h>
#include "../fastio.h"
#include "SoftwareSerial.h"
void GpioEnableInt(uint32_t port, uint32_t pin, uint32_t mode);
void GpioDisableInt(uint32_t port, uint32_t pin);
//
// Statics
//
SoftwareSerial *SoftwareSerial::active_object = 0;
unsigned char SoftwareSerial::_receive_buffer[_SS_MAX_RX_BUFF];
volatile uint8_t SoftwareSerial::_receive_buffer_tail = 0;
volatile uint8_t SoftwareSerial::_receive_buffer_head = 0;
typedef struct _DELAY_TABLE {
long baud;
uint16_t rx_delay_centering;
uint16_t rx_delay_intrabit;
uint16_t rx_delay_stopbit;
uint16_t tx_delay;
} DELAY_TABLE;
// rough delay estimation
static const DELAY_TABLE table[] = {
//baud |rxcenter|rxintra |rxstop |tx { 250000, 2, 4, 4, 4, }, //Done but not good due to instruction cycle error { 115200, 4, 8, 8, 8, }, //Done but not good due to instruction cycle error
//{ 74880, 69, 139, 62, 162, }, // estimation
//{ 57600, 100, 185, 1, 208, }, // Done but not good due to instruction cycle error
//{ 38400, 13, 26, 26, 26, }, // Done
//{ 19200, 26, 52, 52, 52, }, // Done { 9600, 52, 104, 104, 104, }, // Done
//{ 4800, 104, 208, 208, 208, },
//{ 2400, 208, 417, 417, 417, },
//{ 1200, 416, 833, 833, 833,},
};
//
// Private methods
//
inline void SoftwareSerial::tunedDelay(const uint32_t count) {
DELAY_US(count);
}
// This function sets the current object as the "listening"
// one and returns true if it replaces another
bool SoftwareSerial::listen() {
if (!_rx_delay_stopbit)
return false;
if (active_object != this) {
if (active_object)
active_object->stopListening();
_buffer_overflow = false;
_receive_buffer_head = _receive_buffer_tail = 0;
active_object = this;
setRxIntMsk(true);
return true;
}
return false;
}
// Stop listening. Returns true if we were actually listening.
bool SoftwareSerial::stopListening() {
if (active_object == this) {
setRxIntMsk(false);
active_object = NULL;
return true;
}
return false;
}
//
// The receive routine called by the interrupt handler
//
void SoftwareSerial::recv() {
uint8_t d = 0;
// If RX line is high, then we don't see any start bit
// so interrupt is probably not for us
if (_inverse_logic ? rx_pin_read() : !rx_pin_read()) {
// Disable further interrupts during reception, this prevents
// triggering another interrupt directly after we return, which can
// cause problems at higher baudrates.
setRxIntMsk(false);//__disable_irq();//
// Wait approximately 1/2 of a bit width to "center" the sample
tunedDelay(_rx_delay_centering);
// Read each of the 8 bits
for (uint8_t i=8; i > 0; --i) {
tunedDelay(_rx_delay_intrabit);
d >>= 1;
if (rx_pin_read()) d |= 0x80;
}
if (_inverse_logic) d = ~d;
// if buffer full, set the overflow flag and return
uint8_t next = (_receive_buffer_tail + 1) % _SS_MAX_RX_BUFF;
if (next != _receive_buffer_head) {
// save new data in buffer: tail points to where byte goes
_receive_buffer[_receive_buffer_tail] = d; // save new byte
_receive_buffer_tail = next;
}
else {
_buffer_overflow = true;
}
tunedDelay(_rx_delay_stopbit);
// Re-enable interrupts when we're sure to be inside the stop bit
setRxIntMsk(true); //__enable_irq();//
}
}
uint32_t SoftwareSerial::rx_pin_read() {
return digitalRead(_receivePin);
}
//
// Interrupt handling
//
/* static */
inline void SoftwareSerial::handle_interrupt() {
if (active_object)
active_object->recv();
}
extern "C" void intWrapper() {
SoftwareSerial::handle_interrupt();
}
//
// Constructor
//
SoftwareSerial::SoftwareSerial(pin_t receivePin, pin_t transmitPin, bool inverse_logic /* = false */) :
_rx_delay_centering(0),
_rx_delay_intrabit(0),
_rx_delay_stopbit(0),
_tx_delay(0),
_buffer_overflow(false),
_inverse_logic(inverse_logic) {
setTX(transmitPin);
setRX(receivePin);
}
//
// Destructor
//
SoftwareSerial::~SoftwareSerial() {
end();
}
void SoftwareSerial::setTX(pin_t tx) {
// First write, then set output. If we do this the other way around,
// the pin would be output low for a short while before switching to
// output hihg. Now, it is input with pullup for a short while, which
// is fine. With inverse logic, either order is fine.
digitalWrite(tx, _inverse_logic ? LOW : HIGH);
pinMode(tx,OUTPUT);
_transmitPin = tx;
}
void SoftwareSerial::setRX(pin_t rx) {
pinMode(rx, INPUT_PULLUP); // pullup for normal logic!
//if (!_inverse_logic)
// digitalWrite(rx, HIGH);
_receivePin = rx;
_receivePort = LPC1768_PIN_PORT(rx);
_receivePortPin = LPC1768_PIN_PIN(rx);
/* GPIO_T * rxPort = digitalPinToPort(rx);
_receivePortRegister = portInputRegister(rxPort);
_receiveBitMask = digitalPinToBitMask(rx);*/
}
//
// Public methods
//
void SoftwareSerial::begin(long speed) {
_rx_delay_centering = _rx_delay_intrabit = _rx_delay_stopbit = _tx_delay = 0;
for(uint8_t i = 0; i < sizeof(table)/sizeof(table[0]); ++i) {
long baud = table[i].baud;
if (baud == speed) {
_rx_delay_centering = table[i].rx_delay_centering;
_rx_delay_intrabit = table[i].rx_delay_intrabit;
_rx_delay_stopbit = table[i].rx_delay_stopbit;
_tx_delay = table[i].tx_delay;
break;
}
}
attachInterrupt(_receivePin, intWrapper, CHANGE); //this->handle_interrupt, CHANGE);
listen();
tunedDelay(_tx_delay);
}
void SoftwareSerial::setRxIntMsk(bool enable) {
if (enable)
GpioEnableInt(_receivePort,_receivePin,CHANGE);
else
GpioDisableInt(_receivePort,_receivePin);
}
void SoftwareSerial::end() {
stopListening();
}
// Read data from buffer
int16_t SoftwareSerial::read() {
if (!isListening()) return -1;
// Empty buffer?
if (_receive_buffer_head == _receive_buffer_tail) return -1;
// Read from "head"
uint8_t d = _receive_buffer[_receive_buffer_head]; // grab next byte
_receive_buffer_head = (_receive_buffer_head + 1) % _SS_MAX_RX_BUFF;
return d;
}
size_t SoftwareSerial::available() {
if (!isListening()) return 0;
return (_receive_buffer_tail + _SS_MAX_RX_BUFF - _receive_buffer_head) % _SS_MAX_RX_BUFF;
}
size_t SoftwareSerial::write(uint8_t b) {
// By declaring these as local variables, the compiler will put them
// in registers _before_ disabling interrupts and entering the
// critical timing sections below, which makes it a lot easier to
// verify the cycle timings
bool inv = _inverse_logic;
uint16_t delay = _tx_delay;
if (inv) b = ~b;
cli(); // turn off interrupts for a clean txmit
// Write the start bit
digitalWrite(_transmitPin, !!inv);
tunedDelay(delay);
// Write each of the 8 bits
for (uint8_t i = 8; i > 0; --i) {
digitalWrite(_transmitPin, b & 1); // send 1 //(GPIO_Desc[_transmitPin].P)->DOUT |= GPIO_Desc[_transmitPin].bit;
// send 0 //(GPIO_Desc[_transmitPin].P)->DOUT &= ~GPIO_Desc[_transmitPin].bit;
tunedDelay(delay);
b >>= 1;
}
// restore pin to natural state
digitalWrite(_transmitPin, !inv);
sei(); // turn interrupts back on
tunedDelay(delay);
return 1;
}
void SoftwareSerial::flush() {
if (!isListening()) return;
cli();
_receive_buffer_head = _receive_buffer_tail = 0;
sei();
}
int16_t SoftwareSerial::peek() {
if (!isListening())
return -1;
// Empty buffer?
if (_receive_buffer_head == _receive_buffer_tail)
return -1;
// Read from "head"
return _receive_buffer[_receive_buffer_head];
}
#endif // TARGET_LPC1768

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/*
* SoftwareSerial.h (formerly NewSoftSerial.h)
*
* 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
*
* The latest version of this library can always be found at
* http://arduiniana.org.
*/
#ifndef SOFTWARESERIAL_H
#define SOFTWARESERIAL_H
#include <Arduino.h>
#include <stdint.h>
//#include "serial.h"
#include <Stream.h>
#include <Print.h>
/******************************************************************************
* Definitions
******************************************************************************/
#define _SS_MAX_RX_BUFF 64 // RX buffer size
class SoftwareSerial : public Stream
{
private:
// per object data
pin_t _receivePin;
pin_t _transmitPin;
// uint32_t _receiveBitMask; // for rx interrupts
uint32_t _receivePort;
uint32_t _receivePortPin;
// Expressed as 4-cycle delays (must never be 0!)
uint16_t _rx_delay_centering;
uint16_t _rx_delay_intrabit;
uint16_t _rx_delay_stopbit;
uint16_t _tx_delay;
uint16_t _buffer_overflow:1;
uint16_t _inverse_logic:1;
// static data
static unsigned char _receive_buffer[_SS_MAX_RX_BUFF];
static volatile uint8_t _receive_buffer_tail;
static volatile uint8_t _receive_buffer_head;
static SoftwareSerial *active_object;
// private methods
void recv();
uint32_t rx_pin_read();
void tx_pin_write(uint8_t pin_state);
void setTX(pin_t transmitPin);
void setRX(pin_t receivePin);
void setRxIntMsk(bool enable);
// private static method for timing
static inline void tunedDelay(uint32_t delay);
public:
// public methods
SoftwareSerial(pin_t receivePin, pin_t transmitPin, bool inverse_logic = false);
~SoftwareSerial();
void begin(long speed);
bool listen();
void end();
bool isListening() { return this == active_object; }
bool stopListening();
bool overflow() { bool ret = _buffer_overflow; if (ret) _buffer_overflow = false; return ret; }
int16_t peek();
virtual size_t write(uint8_t byte);
virtual int16_t read();
virtual size_t available();
virtual void flush();
operator bool() { return true; }
using Print::write;
//using HalSerial::write;
// public only for easy access by interrupt handlers
static inline void handle_interrupt() __attribute__((__always_inline__));
};
// Arduino 0012 workaround
#undef int
#undef char
#undef long
#undef byte
#undef float
#undef abs
#undef round
#endif // SOFTWARESERIAL_H