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157 lines
3.9 KiB
C++
157 lines
3.9 KiB
C++
/*
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HardwareSerial.h - Hardware serial library for Wiring
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Copyright (c) 2006 Nicholas Zambetti. All right reserved.
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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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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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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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Modified 28 September 2010 by Mark Sproul
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*/
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#ifndef MarlinSerial_h
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#define MarlinSerial_h
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#include <math.h>
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#include <inttypes.h>
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//#include <Stream.h>
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#include <string.h>
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#define FORCE_INLINE __attribute__((always_inline)) inline
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#include "WString.h"
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#define DEC 10
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#define HEX 16
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#define OCT 8
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#define BIN 2
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#define BYTE 0
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// Define constants and variables for buffering incoming serial data. We're
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// using a ring buffer (I think), in which rx_buffer_head is the index of the
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// location to which to write the next incoming character and rx_buffer_tail
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// is the index of the location from which to read.
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#define RX_BUFFER_SIZE 128
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struct ring_buffer
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{
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unsigned char buffer[RX_BUFFER_SIZE];
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int head;
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int tail;
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};
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#if defined(UBRRH) || defined(UBRR0H)
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extern ring_buffer rx_buffer;
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#endif
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class MarlinSerial //: public Stream
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{
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public:
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MarlinSerial();
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void begin(long);
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void end();
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int peek(void);
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int read(void);
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void flush(void);
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FORCE_INLINE int available(void)
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{
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return (unsigned int)(RX_BUFFER_SIZE + rx_buffer.head - rx_buffer.tail) % RX_BUFFER_SIZE;
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}
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FORCE_INLINE void write(uint8_t c)
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{
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while (!((UCSR0A) & (1 << UDRE0)))
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;
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UDR0 = c;
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}
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FORCE_INLINE void checkRx(void)
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{
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if((UCSR0A & (1<<RXC0)) != 0) {
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unsigned char c = UDR0;
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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
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// just before the tail (meaning that the head would advance to the
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// current location of the tail), we're about to overflow the buffer
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// and so we don't write the character or advance the head.
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if (i != rx_buffer.tail) {
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rx_buffer.buffer[rx_buffer.head] = c;
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rx_buffer.head = i;
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}
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}
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}
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private:
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void printNumber(unsigned long, uint8_t);
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void printFloat(double, uint8_t);
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public:
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FORCE_INLINE void write(const char *str)
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{
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while (*str)
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write(*str++);
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}
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FORCE_INLINE void write(const uint8_t *buffer, size_t size)
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{
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while (size--)
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write(*buffer++);
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}
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FORCE_INLINE void print(const String &s)
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{
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for (int i = 0; i < s.length(); i++) {
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write(s[i]);
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}
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}
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FORCE_INLINE void print(const char *str)
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{
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write(str);
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}
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void print(char, int = BYTE);
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void print(unsigned char, int = BYTE);
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void print(int, int = DEC);
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void print(unsigned int, int = DEC);
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void print(long, int = DEC);
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void print(unsigned long, int = DEC);
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void print(double, int = 2);
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void println(const String &s);
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void println(const char[]);
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void println(char, int = BYTE);
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void println(unsigned char, int = BYTE);
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void println(int, int = DEC);
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void println(unsigned int, int = DEC);
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void println(long, int = DEC);
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void println(unsigned long, int = DEC);
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void println(double, int = 2);
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void println(void);
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};
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#if defined(UBRRH) || defined(UBRR0H)
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extern MarlinSerial MSerial;
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#endif
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#endif
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