1 | /*
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2 | Copyright (c) 2011 Arduino. All right reserved.
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3 |
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4 | This library is free software; you can redistribute it and/or
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5 | modify it under the terms of the GNU Lesser General Public
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6 | License as published by the Free Software Foundation; either
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7 | version 2.1 of the License, or (at your option) any later version.
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8 |
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9 | This library is distributed in the hope that it will be useful,
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10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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12 | See the GNU Lesser General Public License for more details.
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13 |
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14 | You should have received a copy of the GNU Lesser General Public
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15 | License along with this library; if not, write to the Free Software
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16 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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17 | */
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18 |
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19 | #ifndef _RING_BUFFER_
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20 | #define _RING_BUFFER_
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21 |
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22 | #include <stdint.h>
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23 |
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24 | // Define constants and variables for buffering incoming serial data. We're
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25 | // using a ring buffer (I think), in which head is the index of the location
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26 | // to which to write the next incoming character and tail is the index of the
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27 | // location from which to read.
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28 | #define SERIAL_BUFFER_SIZE 1024
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29 |
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30 | class RingBuffer
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31 | {
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32 | public:
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33 | uint8_t _aucBuffer[SERIAL_BUFFER_SIZE] ;
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34 | int _iHead ;
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35 | int _iTail ;
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36 |
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37 | public:
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38 | RingBuffer( void ) ;
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39 | void store_char( uint8_t c ) ;
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40 | void clear();
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41 | int read_char();
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42 | int available();
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43 | int peek();
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44 | bool isFull();
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45 |
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46 | private:
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47 | int nextIndex(int index);
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48 | } ;
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49 |
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50 | #endif /* _RING_BUFFER_ */
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