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<?xml version="1.0" encoding="UTF-8"?> | ||
<projectDescription> | ||
<name>ArduinoCore</name> | ||
<comment></comment> | ||
<projects> | ||
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<name>org.eclipse.cdt.managedbuilder.core.genmakebuilder</name> | ||
<triggers>clean,full,incremental,</triggers> | ||
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<key>?name?</key> | ||
<value></value> | ||
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<key>org.eclipse.cdt.make.core.append_environment</key> | ||
<value>true</value> | ||
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<key>org.eclipse.cdt.make.core.autoBuildTarget</key> | ||
<value>all</value> | ||
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<value></value> | ||
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<value>make</value> | ||
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<value>${workspace_loc:/ArduinoCore/Release}</value> | ||
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<value>clean</value> | ||
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</projectDescription> |
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#Fri Jun 03 18:42:45 CAT 2011 | ||
avrtarget/ClockFrequency=16000000 | ||
avrtarget/ExtRAMSize=0 | ||
avrtarget/ExtendedRAM=false | ||
avrtarget/MCUType=atmega328 | ||
avrtarget/UseEEPROM=false | ||
avrtarget/UseExtendedRAMforHeap=true | ||
avrtarget/perConfig=false | ||
eclipse.preferences.version=1 |
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/* | ||
HardwareSerial.cpp - Hardware serial library for Wiring | ||
Copyright (c) 2006 Nicholas Zambetti. All right reserved. | ||
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 | ||
Modified 23 November 2006 by David A. Mellis | ||
Modified 28 September 2010 by Mark Sproul | ||
*/ | ||
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#include <stdlib.h> | ||
#include <stdio.h> | ||
#include <string.h> | ||
#include <inttypes.h> | ||
#include "wiring.h" | ||
#include "wiring_private.h" | ||
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// this next line disables the entire HardwareSerial.cpp, | ||
// this is so I can support Attiny series and any other chip without a uart | ||
#if defined(UBRRH) || defined(UBRR0H) || defined(UBRR1H) || defined(UBRR2H) || defined(UBRR3H) | ||
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#include "HardwareSerial.h" | ||
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// Define constants and variables for buffering incoming serial data. We're | ||
// using a ring buffer (I think), in which rx_buffer_head is the index of the | ||
// location to which to write the next incoming character and rx_buffer_tail | ||
// is the index of the location from which to read. | ||
#if (RAMEND < 1000) | ||
#define RX_BUFFER_SIZE 32 | ||
#else | ||
#define RX_BUFFER_SIZE 128 | ||
#endif | ||
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struct ring_buffer | ||
{ | ||
unsigned char buffer[RX_BUFFER_SIZE]; | ||
int head; | ||
int tail; | ||
}; | ||
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#if defined(UBRRH) || defined(UBRR0H) | ||
ring_buffer rx_buffer = { { 0 }, 0, 0 }; | ||
#endif | ||
#if defined(UBRR1H) | ||
ring_buffer rx_buffer1 = { { 0 }, 0, 0 }; | ||
#endif | ||
#if defined(UBRR2H) | ||
ring_buffer rx_buffer2 = { { 0 }, 0, 0 }; | ||
#endif | ||
#if defined(UBRR3H) | ||
ring_buffer rx_buffer3 = { { 0 }, 0, 0 }; | ||
#endif | ||
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inline void store_char(unsigned char c, ring_buffer *rx_buffer) | ||
{ | ||
int i = (unsigned int)(rx_buffer->head + 1) % RX_BUFFER_SIZE; | ||
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// if we should be storing the received character into the location | ||
// just before the tail (meaning that the head would advance to the | ||
// current location of the tail), we're about to overflow the buffer | ||
// and so we don't write the character or advance the head. | ||
if (i != rx_buffer->tail) { | ||
rx_buffer->buffer[rx_buffer->head] = c; | ||
rx_buffer->head = i; | ||
} | ||
} | ||
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#if defined(USART_RX_vect) | ||
SIGNAL(USART_RX_vect) | ||
{ | ||
#if defined(UDR0) | ||
unsigned char c = UDR0; | ||
#elif defined(UDR) | ||
unsigned char c = UDR; // atmega8535 | ||
#else | ||
#error UDR not defined | ||
#endif | ||
store_char(c, &rx_buffer); | ||
} | ||
#elif defined(SIG_USART0_RECV) && defined(UDR0) | ||
SIGNAL(SIG_USART0_RECV) | ||
{ | ||
unsigned char c = UDR0; | ||
store_char(c, &rx_buffer); | ||
} | ||
#elif defined(SIG_UART0_RECV) && defined(UDR0) | ||
SIGNAL(SIG_UART0_RECV) | ||
{ | ||
unsigned char c = UDR0; | ||
store_char(c, &rx_buffer); | ||
} | ||
//#elif defined(SIG_USART_RECV) | ||
#elif defined(USART0_RX_vect) | ||
// fixed by Mark Sproul this is on the 644/644p | ||
//SIGNAL(SIG_USART_RECV) | ||
SIGNAL(USART0_RX_vect) | ||
{ | ||
#if defined(UDR0) | ||
unsigned char c = UDR0; | ||
#elif defined(UDR) | ||
unsigned char c = UDR; // atmega8, atmega32 | ||
#else | ||
#error UDR not defined | ||
#endif | ||
store_char(c, &rx_buffer); | ||
} | ||
#elif defined(SIG_UART_RECV) | ||
// this is for atmega8 | ||
SIGNAL(SIG_UART_RECV) | ||
{ | ||
#if defined(UDR0) | ||
unsigned char c = UDR0; // atmega645 | ||
#elif defined(UDR) | ||
unsigned char c = UDR; // atmega8 | ||
#endif | ||
store_char(c, &rx_buffer); | ||
} | ||
#elif defined(USBCON) | ||
#warning No interrupt handler for usart 0 | ||
#warning Serial(0) is on USB interface | ||
#else | ||
#error No interrupt handler for usart 0 | ||
#endif | ||
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//#if defined(SIG_USART1_RECV) | ||
#if defined(USART1_RX_vect) | ||
//SIGNAL(SIG_USART1_RECV) | ||
SIGNAL(USART1_RX_vect) | ||
{ | ||
unsigned char c = UDR1; | ||
store_char(c, &rx_buffer1); | ||
} | ||
#elif defined(SIG_USART1_RECV) | ||
#error SIG_USART1_RECV | ||
#endif | ||
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#if defined(USART2_RX_vect) && defined(UDR2) | ||
SIGNAL(USART2_RX_vect) | ||
{ | ||
unsigned char c = UDR2; | ||
store_char(c, &rx_buffer2); | ||
} | ||
#elif defined(SIG_USART2_RECV) | ||
#error SIG_USART2_RECV | ||
#endif | ||
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#if defined(USART3_RX_vect) && defined(UDR3) | ||
SIGNAL(USART3_RX_vect) | ||
{ | ||
unsigned char c = UDR3; | ||
store_char(c, &rx_buffer3); | ||
} | ||
#elif defined(SIG_USART3_RECV) | ||
#error SIG_USART3_RECV | ||
#endif | ||
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// Constructors //////////////////////////////////////////////////////////////// | ||
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HardwareSerial::HardwareSerial(ring_buffer *rx_buffer, | ||
volatile uint8_t *ubrrh, volatile uint8_t *ubrrl, | ||
volatile uint8_t *ucsra, volatile uint8_t *ucsrb, | ||
volatile uint8_t *udr, | ||
uint8_t rxen, uint8_t txen, uint8_t rxcie, uint8_t udre, uint8_t u2x) | ||
{ | ||
_rx_buffer = rx_buffer; | ||
_ubrrh = ubrrh; | ||
_ubrrl = ubrrl; | ||
_ucsra = ucsra; | ||
_ucsrb = ucsrb; | ||
_udr = udr; | ||
_rxen = rxen; | ||
_txen = txen; | ||
_rxcie = rxcie; | ||
_udre = udre; | ||
_u2x = u2x; | ||
} | ||
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// Public Methods ////////////////////////////////////////////////////////////// | ||
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void HardwareSerial::begin(long baud) | ||
{ | ||
uint16_t baud_setting; | ||
bool use_u2x = true; | ||
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#if F_CPU == 16000000UL | ||
// hardcoded exception for compatibility with the bootloader shipped | ||
// with the Duemilanove and previous boards and the firmware on the 8U2 | ||
// on the Uno and Mega 2560. | ||
if (baud == 57600) { | ||
use_u2x = false; | ||
} | ||
#endif | ||
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if (use_u2x) { | ||
*_ucsra = 1 << _u2x; | ||
baud_setting = (F_CPU / 4 / baud - 1) / 2; | ||
} else { | ||
*_ucsra = 0; | ||
baud_setting = (F_CPU / 8 / baud - 1) / 2; | ||
} | ||
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// assign the baud_setting, a.k.a. ubbr (USART Baud Rate Register) | ||
*_ubrrh = baud_setting >> 8; | ||
*_ubrrl = baud_setting; | ||
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sbi(*_ucsrb, _rxen); | ||
sbi(*_ucsrb, _txen); | ||
sbi(*_ucsrb, _rxcie); | ||
} | ||
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void HardwareSerial::end() | ||
{ | ||
cbi(*_ucsrb, _rxen); | ||
cbi(*_ucsrb, _txen); | ||
cbi(*_ucsrb, _rxcie); | ||
} | ||
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int HardwareSerial::available(void) | ||
{ | ||
return (unsigned int)(RX_BUFFER_SIZE + _rx_buffer->head - _rx_buffer->tail) % RX_BUFFER_SIZE; | ||
} | ||
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int HardwareSerial::peek(void) | ||
{ | ||
if (_rx_buffer->head == _rx_buffer->tail) { | ||
return -1; | ||
} else { | ||
return _rx_buffer->buffer[_rx_buffer->tail]; | ||
} | ||
} | ||
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int HardwareSerial::read(void) | ||
{ | ||
// if the head isn't ahead of the tail, we don't have any characters | ||
if (_rx_buffer->head == _rx_buffer->tail) { | ||
return -1; | ||
} else { | ||
unsigned char c = _rx_buffer->buffer[_rx_buffer->tail]; | ||
_rx_buffer->tail = (unsigned int)(_rx_buffer->tail + 1) % RX_BUFFER_SIZE; | ||
return c; | ||
} | ||
} | ||
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void HardwareSerial::flush() | ||
{ | ||
// don't reverse this or there may be problems if the RX interrupt | ||
// occurs after reading the value of rx_buffer_head but before writing | ||
// the value to rx_buffer_tail; the previous value of rx_buffer_head | ||
// may be written to rx_buffer_tail, making it appear as if the buffer | ||
// don't reverse this or there may be problems if the RX interrupt | ||
// occurs after reading the value of rx_buffer_head but before writing | ||
// the value to rx_buffer_tail; the previous value of rx_buffer_head | ||
// may be written to rx_buffer_tail, making it appear as if the buffer | ||
// were full, not empty. | ||
_rx_buffer->head = _rx_buffer->tail; | ||
} | ||
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void HardwareSerial::write(uint8_t c) | ||
{ | ||
while (!((*_ucsra) & (1 << _udre))) | ||
; | ||
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*_udr = c; | ||
} | ||
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// Preinstantiate Objects ////////////////////////////////////////////////////// | ||
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#if defined(UBRRH) && defined(UBRRL) | ||
HardwareSerial Serial(&rx_buffer, &UBRRH, &UBRRL, &UCSRA, &UCSRB, &UDR, RXEN, TXEN, RXCIE, UDRE, U2X); | ||
#elif defined(UBRR0H) && defined(UBRR0L) | ||
HardwareSerial Serial(&rx_buffer, &UBRR0H, &UBRR0L, &UCSR0A, &UCSR0B, &UDR0, RXEN0, TXEN0, RXCIE0, UDRE0, U2X0); | ||
#elif defined(USBCON) | ||
#warning no serial port defined (port 0) | ||
#else | ||
#error no serial port defined (port 0) | ||
#endif | ||
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#if defined(UBRR1H) | ||
HardwareSerial Serial1(&rx_buffer1, &UBRR1H, &UBRR1L, &UCSR1A, &UCSR1B, &UDR1, RXEN1, TXEN1, RXCIE1, UDRE1, U2X1); | ||
#endif | ||
#if defined(UBRR2H) | ||
HardwareSerial Serial2(&rx_buffer2, &UBRR2H, &UBRR2L, &UCSR2A, &UCSR2B, &UDR2, RXEN2, TXEN2, RXCIE2, UDRE2, U2X2); | ||
#endif | ||
#if defined(UBRR3H) | ||
HardwareSerial Serial3(&rx_buffer3, &UBRR3H, &UBRR3L, &UCSR3A, &UCSR3B, &UDR3, RXEN3, TXEN3, RXCIE3, UDRE3, U2X3); | ||
#endif | ||
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#endif // whole file | ||
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