From db605dd18b11ecfb5cd9f92c721c52cb70543384 Mon Sep 17 00:00:00 2001 From: "David A. Mellis" Date: Mon, 1 Jun 2009 08:32:11 +0000 Subject: First integration of the Arduino code in Processing 5503: PreProcessor and Compiler have been integrated with changes to the Sketch. Compilation still has problems (Thread error on success, and can't handle non-pde files in a sketch). Modified the Mac OS X make.sh to copy the hardware, avr tools, and example over. Removing some of the antlr stuff. Disabling the Commander (command-line execution) for now. Added Library, LibraryManager, and Target. Added support for prefixed preferences (e.g. for boards and programmers). --- cores/arduino/HardwareSerial.cpp | 191 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 191 insertions(+) create mode 100755 cores/arduino/HardwareSerial.cpp (limited to 'cores/arduino/HardwareSerial.cpp') diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp new file mode 100755 index 0000000..f8a959a --- /dev/null +++ b/cores/arduino/HardwareSerial.cpp @@ -0,0 +1,191 @@ +/* + 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 +*/ + +#include +#include +#include +#include "wiring.h" +#include "wiring_private.h" + +#include "HardwareSerial.h" + +// 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. +#define RX_BUFFER_SIZE 128 + +struct ring_buffer { + unsigned char buffer[RX_BUFFER_SIZE]; + int head; + int tail; +}; + +ring_buffer rx_buffer = { { 0 }, 0, 0 }; + +#if defined(__AVR_ATmega1280__) +ring_buffer rx_buffer1 = { { 0 }, 0, 0 }; +ring_buffer rx_buffer2 = { { 0 }, 0, 0 }; +ring_buffer rx_buffer3 = { { 0 }, 0, 0 }; +#endif + +inline void store_char(unsigned char c, ring_buffer *rx_buffer) +{ + int i = (rx_buffer->head + 1) % RX_BUFFER_SIZE; + + // 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; + } +} + +#if defined(__AVR_ATmega1280__) + +SIGNAL(SIG_USART0_RECV) +{ + unsigned char c = UDR0; + store_char(c, &rx_buffer); +} + +SIGNAL(SIG_USART1_RECV) +{ + unsigned char c = UDR1; + store_char(c, &rx_buffer1); +} + +SIGNAL(SIG_USART2_RECV) +{ + unsigned char c = UDR2; + store_char(c, &rx_buffer2); +} + +SIGNAL(SIG_USART3_RECV) +{ + unsigned char c = UDR3; + store_char(c, &rx_buffer3); +} + +#else + +#if defined(__AVR_ATmega8__) +SIGNAL(SIG_UART_RECV) +#else +SIGNAL(USART_RX_vect) +#endif +{ +#if defined(__AVR_ATmega8__) + unsigned char c = UDR; +#else + unsigned char c = UDR0; +#endif + store_char(c, &rx_buffer); +} + +#endif + +// Constructors //////////////////////////////////////////////////////////////// + +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) +{ + _rx_buffer = rx_buffer; + _ubrrh = ubrrh; + _ubrrl = ubrrl; + _ucsra = ucsra; + _ucsrb = ucsrb; + _udr = udr; + _rxen = rxen; + _txen = txen; + _rxcie = rxcie; + _udre = udre; +} + +// Public Methods ////////////////////////////////////////////////////////////// + +void HardwareSerial::begin(long speed) +{ + *_ubrrh = ((F_CPU / 16 + speed / 2) / speed - 1) >> 8; + *_ubrrl = ((F_CPU / 16 + speed / 2) / speed - 1); + sbi(*_ucsrb, _rxen); + sbi(*_ucsrb, _txen); + sbi(*_ucsrb, _rxcie); +} + +uint8_t HardwareSerial::available(void) +{ + return (RX_BUFFER_SIZE + _rx_buffer->head - _rx_buffer->tail) % RX_BUFFER_SIZE; +} + +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 = (_rx_buffer->tail + 1) % RX_BUFFER_SIZE; + return c; + } +} + +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; +} + +void HardwareSerial::write(uint8_t c) +{ + while (!((*_ucsra) & (1 << _udre))) + ; + + *_udr = c; +} + +// Preinstantiate Objects ////////////////////////////////////////////////////// + +#if defined(__AVR_ATmega8__) +HardwareSerial Serial(&rx_buffer, &UBRRH, &UBRRL, &UCSRA, &UCSRB, &UDR, RXEN, TXEN, RXCIE, UDRE); +#else +HardwareSerial Serial(&rx_buffer, &UBRR0H, &UBRR0L, &UCSR0A, &UCSR0B, &UDR0, RXEN0, TXEN0, RXCIE0, UDRE0); +#endif + +#if defined(__AVR_ATmega1280__) +HardwareSerial Serial1(&rx_buffer1, &UBRR1H, &UBRR1L, &UCSR1A, &UCSR1B, &UDR1, RXEN1, TXEN1, RXCIE1, UDRE1); +HardwareSerial Serial2(&rx_buffer2, &UBRR2H, &UBRR2L, &UCSR2A, &UCSR2B, &UDR2, RXEN2, TXEN2, RXCIE2, UDRE2); +HardwareSerial Serial3(&rx_buffer3, &UBRR3H, &UBRR3L, &UCSR3A, &UCSR3B, &UDR3, RXEN3, TXEN3, RXCIE3, UDRE3); +#endif + -- cgit v1.2.3-18-g5258 From 2fc32fc3411472151ce5d0e19ec42440e0c8ed3d Mon Sep 17 00:00:00 2001 From: "David A. Mellis" Date: Sun, 12 Jul 2009 01:58:15 +0000 Subject: Clearing the U2Xn bit in Serial.begin() (because it is set on the Pro / Pro Mini 328). Fixing some indentation. --- cores/arduino/HardwareSerial.cpp | 95 ++++++++++++++++++++-------------------- 1 file changed, 48 insertions(+), 47 deletions(-) (limited to 'cores/arduino/HardwareSerial.cpp') diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp index f8a959a..d7a2d6e 100755 --- a/cores/arduino/HardwareSerial.cpp +++ b/cores/arduino/HardwareSerial.cpp @@ -49,41 +49,41 @@ ring_buffer rx_buffer3 = { { 0 }, 0, 0 }; inline void store_char(unsigned char c, ring_buffer *rx_buffer) { - int i = (rx_buffer->head + 1) % RX_BUFFER_SIZE; - - // 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; - } + int i = (rx_buffer->head + 1) % RX_BUFFER_SIZE; + + // 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; + } } #if defined(__AVR_ATmega1280__) SIGNAL(SIG_USART0_RECV) { - unsigned char c = UDR0; + unsigned char c = UDR0; store_char(c, &rx_buffer); } SIGNAL(SIG_USART1_RECV) { - unsigned char c = UDR1; + unsigned char c = UDR1; store_char(c, &rx_buffer1); } SIGNAL(SIG_USART2_RECV) { - unsigned char c = UDR2; + unsigned char c = UDR2; store_char(c, &rx_buffer2); } SIGNAL(SIG_USART3_RECV) { - unsigned char c = UDR3; + unsigned char c = UDR3; store_char(c, &rx_buffer3); } @@ -96,9 +96,9 @@ SIGNAL(USART_RX_vect) #endif { #if defined(__AVR_ATmega8__) - unsigned char c = UDR; + unsigned char c = UDR; #else - unsigned char c = UDR0; + unsigned char c = UDR0; #endif store_char(c, &rx_buffer); } @@ -111,7 +111,7 @@ 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 rxen, uint8_t txen, uint8_t rxcie, uint8_t udre, uint8_t u2x) { _rx_buffer = rx_buffer; _ubrrh = ubrrh; @@ -123,14 +123,16 @@ HardwareSerial::HardwareSerial(ring_buffer *rx_buffer, _txen = txen; _rxcie = rxcie; _udre = udre; + _u2x = u2x; } // Public Methods ////////////////////////////////////////////////////////////// void HardwareSerial::begin(long speed) { - *_ubrrh = ((F_CPU / 16 + speed / 2) / speed - 1) >> 8; - *_ubrrl = ((F_CPU / 16 + speed / 2) / speed - 1); + *_ubrrh = ((F_CPU / 16 + speed / 2) / speed - 1) >> 8; + *_ubrrl = ((F_CPU / 16 + speed / 2) / speed - 1); + cbi(*_ucsra, _u2x); sbi(*_ucsrb, _rxen); sbi(*_ucsrb, _txen); sbi(*_ucsrb, _rxcie); @@ -138,54 +140,53 @@ void HardwareSerial::begin(long speed) uint8_t HardwareSerial::available(void) { - return (RX_BUFFER_SIZE + _rx_buffer->head - _rx_buffer->tail) % RX_BUFFER_SIZE; + return (RX_BUFFER_SIZE + _rx_buffer->head - _rx_buffer->tail) % RX_BUFFER_SIZE; } 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 = (_rx_buffer->tail + 1) % RX_BUFFER_SIZE; - return c; - } + // 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 = (_rx_buffer->tail + 1) % RX_BUFFER_SIZE; + return c; + } } 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; + // 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; } void HardwareSerial::write(uint8_t c) { - while (!((*_ucsra) & (1 << _udre))) - ; + while (!((*_ucsra) & (1 << _udre))) + ; - *_udr = c; + *_udr = c; } // Preinstantiate Objects ////////////////////////////////////////////////////// #if defined(__AVR_ATmega8__) -HardwareSerial Serial(&rx_buffer, &UBRRH, &UBRRL, &UCSRA, &UCSRB, &UDR, RXEN, TXEN, RXCIE, UDRE); +HardwareSerial Serial(&rx_buffer, &UBRRH, &UBRRL, &UCSRA, &UCSRB, &UDR, RXEN, TXEN, RXCIE, UDRE, U2X); #else -HardwareSerial Serial(&rx_buffer, &UBRR0H, &UBRR0L, &UCSR0A, &UCSR0B, &UDR0, RXEN0, TXEN0, RXCIE0, UDRE0); +HardwareSerial Serial(&rx_buffer, &UBRR0H, &UBRR0L, &UCSR0A, &UCSR0B, &UDR0, RXEN0, TXEN0, RXCIE0, UDRE0, U2X0); #endif #if defined(__AVR_ATmega1280__) -HardwareSerial Serial1(&rx_buffer1, &UBRR1H, &UBRR1L, &UCSR1A, &UCSR1B, &UDR1, RXEN1, TXEN1, RXCIE1, UDRE1); -HardwareSerial Serial2(&rx_buffer2, &UBRR2H, &UBRR2L, &UCSR2A, &UCSR2B, &UDR2, RXEN2, TXEN2, RXCIE2, UDRE2); -HardwareSerial Serial3(&rx_buffer3, &UBRR3H, &UBRR3L, &UCSR3A, &UCSR3B, &UDR3, RXEN3, TXEN3, RXCIE3, UDRE3); +HardwareSerial Serial1(&rx_buffer1, &UBRR1H, &UBRR1L, &UCSR1A, &UCSR1B, &UDR1, RXEN1, TXEN1, RXCIE1, UDRE1, U2X1); +HardwareSerial Serial2(&rx_buffer2, &UBRR2H, &UBRR2L, &UCSR2A, &UCSR2B, &UDR2, RXEN2, TXEN2, RXCIE2, UDRE2, U2X2); +HardwareSerial Serial3(&rx_buffer3, &UBRR3H, &UBRR3L, &UCSR3A, &UCSR3B, &UDR3, RXEN3, TXEN3, RXCIE3, UDRE3, U2X3); #endif - -- cgit v1.2.3-18-g5258 From 12ea12d14cfe1c7ae208651210a0cb1f73c5977f Mon Sep 17 00:00:00 2001 From: "David A. Mellis" Date: Sun, 12 Jul 2009 02:58:59 +0000 Subject: Adding improved baud rate calculation, including use (or not) of the U2X bit. (Code from gabebear). --- cores/arduino/HardwareSerial.cpp | 35 +++++++++++++++++++++++++++++++---- 1 file changed, 31 insertions(+), 4 deletions(-) (limited to 'cores/arduino/HardwareSerial.cpp') diff --git a/cores/arduino/HardwareSerial.cpp b/cores/arduino/HardwareSerial.cpp index d7a2d6e..1af6a66 100755 --- a/cores/arduino/HardwareSerial.cpp +++ b/cores/arduino/HardwareSerial.cpp @@ -128,11 +128,38 @@ HardwareSerial::HardwareSerial(ring_buffer *rx_buffer, // Public Methods ////////////////////////////////////////////////////////////// -void HardwareSerial::begin(long speed) +void HardwareSerial::begin(long baud) { - *_ubrrh = ((F_CPU / 16 + speed / 2) / speed - 1) >> 8; - *_ubrrl = ((F_CPU / 16 + speed / 2) / speed - 1); - cbi(*_ucsra, _u2x); + uint16_t baud_setting; + bool use_u2x; + + // U2X mode is needed for baud rates higher than (CPU Hz / 16) + if (baud > F_CPU / 16) { + use_u2x = true; + } else { + // figure out if U2X mode would allow for a better connection + + // calculate the percent difference between the baud-rate specified and + // the real baud rate for both U2X and non-U2X mode (0-255 error percent) + uint8_t nonu2x_baud_error = abs((int)(255-((F_CPU/(16*(((F_CPU/8/baud-1)/2)+1))*255)/baud))); + uint8_t u2x_baud_error = abs((int)(255-((F_CPU/(8*(((F_CPU/4/baud-1)/2)+1))*255)/baud))); + + // prefer non-U2X mode because it handles clock skew better + use_u2x = (nonu2x_baud_error > u2x_baud_error); + } + + 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; + } + + // assign the baud_setting, a.k.a. ubbr (USART Baud Rate Register) + *_ubrrh = baud_setting >> 8; + *_ubrrl = baud_setting; + sbi(*_ucsrb, _rxen); sbi(*_ucsrb, _txen); sbi(*_ucsrb, _rxcie); -- cgit v1.2.3-18-g5258