u-blox / easy-connect

Version of easy-connect with the u-blox cellular platforms C027 and C030 added.

Dependents:   HelloMQTT

esp8266-driver/ESP8266/ATParser/BufferedSerial/Buffer/MyBuffer.h@6:304d3ba87a01, 2017-11-03 (annotated)

Committer:
RobMeades
Date:
Fri Nov 03 13:01:23 2017 +0000
Revision:
6:304d3ba87a01
Parent:
0:19aa55d66228 
Add comment concerning N2XX baud rate.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
group-ublox 0:19aa55d66228 1
group-ublox 0:19aa55d66228 2 /**
group-ublox 0:19aa55d66228 3 * @file Buffer.h
group-ublox 0:19aa55d66228 4 * @brief Software Buffer - Templated Ring Buffer for most data types
group-ublox 0:19aa55d66228 5 * @author sam grove
group-ublox 0:19aa55d66228 6 * @version 1.0
group-ublox 0:19aa55d66228 7 * @see
group-ublox 0:19aa55d66228 8 *
group-ublox 0:19aa55d66228 9 * Copyright (c) 2013
group-ublox 0:19aa55d66228 10 *
group-ublox 0:19aa55d66228 11 * Licensed under the Apache License, Version 2.0 (the "License");
group-ublox 0:19aa55d66228 12 * you may not use this file except in compliance with the License.
group-ublox 0:19aa55d66228 13 * You may obtain a copy of the License at
group-ublox 0:19aa55d66228 14 *
group-ublox 0:19aa55d66228 15 * http://www.apache.org/licenses/LICENSE-2.0
group-ublox 0:19aa55d66228 16 *
group-ublox 0:19aa55d66228 17 * Unless required by applicable law or agreed to in writing, software
group-ublox 0:19aa55d66228 18 * distributed under the License is distributed on an "AS IS" BASIS,
group-ublox 0:19aa55d66228 19 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
group-ublox 0:19aa55d66228 20 * See the License for the specific language governing permissions and
group-ublox 0:19aa55d66228 21 * limitations under the License.
group-ublox 0:19aa55d66228 22 */
group-ublox 0:19aa55d66228 23
group-ublox 0:19aa55d66228 24 #ifndef MYBUFFER_H
group-ublox 0:19aa55d66228 25 #define MYBUFFER_H
group-ublox 0:19aa55d66228 26
group-ublox 0:19aa55d66228 27 #include <stdint.h>
group-ublox 0:19aa55d66228 28 #include <string.h>
group-ublox 0:19aa55d66228 29
group-ublox 0:19aa55d66228 30 /** A templated software ring buffer
group-ublox 0:19aa55d66228 31 *
group-ublox 0:19aa55d66228 32 * Example:
group-ublox 0:19aa55d66228 33 * @code
group-ublox 0:19aa55d66228 34 * #include "mbed.h"
group-ublox 0:19aa55d66228 35 * #include "MyBuffer.h"
group-ublox 0:19aa55d66228 36 *
group-ublox 0:19aa55d66228 37 * MyBuffer <char> buf;
group-ublox 0:19aa55d66228 38 *
group-ublox 0:19aa55d66228 39 * int main()
group-ublox 0:19aa55d66228 40 * {
group-ublox 0:19aa55d66228 41 * buf = 'a';
group-ublox 0:19aa55d66228 42 * buf.put('b');
group-ublox 0:19aa55d66228 43 * char *head = buf.head();
group-ublox 0:19aa55d66228 44 * puts(head);
group-ublox 0:19aa55d66228 45 *
group-ublox 0:19aa55d66228 46 * char whats_in_there[2] = {0};
group-ublox 0:19aa55d66228 47 * int pos = 0;
group-ublox 0:19aa55d66228 48 *
group-ublox 0:19aa55d66228 49 * while(buf.available())
group-ublox 0:19aa55d66228 50 * {
group-ublox 0:19aa55d66228 51 * whats_in_there[pos++] = buf;
group-ublox 0:19aa55d66228 52 * }
group-ublox 0:19aa55d66228 53 * printf("%c %c\n", whats_in_there[0], whats_in_there[1]);
group-ublox 0:19aa55d66228 54 * buf.clear();
group-ublox 0:19aa55d66228 55 * error("done\n\n\n");
group-ublox 0:19aa55d66228 56 * }
group-ublox 0:19aa55d66228 57 * @endcode
group-ublox 0:19aa55d66228 58 */
group-ublox 0:19aa55d66228 59
group-ublox 0:19aa55d66228 60 template <typename T>
group-ublox 0:19aa55d66228 61 class MyBuffer
group-ublox 0:19aa55d66228 62 {
group-ublox 0:19aa55d66228 63 private:
group-ublox 0:19aa55d66228 64 T *_buf;
group-ublox 0:19aa55d66228 65 volatile uint32_t _wloc;
group-ublox 0:19aa55d66228 66 volatile uint32_t _rloc;
group-ublox 0:19aa55d66228 67 uint32_t _size;
group-ublox 0:19aa55d66228 68
group-ublox 0:19aa55d66228 69 public:
group-ublox 0:19aa55d66228 70 /** Create a Buffer and allocate memory for it
group-ublox 0:19aa55d66228 71 * @param size The size of the buffer
group-ublox 0:19aa55d66228 72 */
group-ublox 0:19aa55d66228 73 MyBuffer(uint32_t size = 0x100);
group-ublox 0:19aa55d66228 74
group-ublox 0:19aa55d66228 75 /** Get the size of the ring buffer
group-ublox 0:19aa55d66228 76 * @return the size of the ring buffer
group-ublox 0:19aa55d66228 77 */
group-ublox 0:19aa55d66228 78 uint32_t getSize();
group-ublox 0:19aa55d66228 79
group-ublox 0:19aa55d66228 80 /** Destry a Buffer and release it's allocated memory
group-ublox 0:19aa55d66228 81 */
group-ublox 0:19aa55d66228 82 ~MyBuffer();
group-ublox 0:19aa55d66228 83
group-ublox 0:19aa55d66228 84 /** Add a data element into the buffer
group-ublox 0:19aa55d66228 85 * @param data Something to add to the buffer
group-ublox 0:19aa55d66228 86 */
group-ublox 0:19aa55d66228 87 void put(T data);
group-ublox 0:19aa55d66228 88
group-ublox 0:19aa55d66228 89 /** Remove a data element from the buffer
group-ublox 0:19aa55d66228 90 * @return Pull the oldest element from the buffer
group-ublox 0:19aa55d66228 91 */
group-ublox 0:19aa55d66228 92 T get(void);
group-ublox 0:19aa55d66228 93
group-ublox 0:19aa55d66228 94 /** Get the address to the head of the buffer
group-ublox 0:19aa55d66228 95 * @return The address of element 0 in the buffer
group-ublox 0:19aa55d66228 96 */
group-ublox 0:19aa55d66228 97 T *head(void);
group-ublox 0:19aa55d66228 98
group-ublox 0:19aa55d66228 99 /** Reset the buffer to 0. Useful if using head() to parse packeted data
group-ublox 0:19aa55d66228 100 */
group-ublox 0:19aa55d66228 101 void clear(void);
group-ublox 0:19aa55d66228 102
group-ublox 0:19aa55d66228 103 /** Determine if anything is readable in the buffer
group-ublox 0:19aa55d66228 104 * @return 1 if something can be read, 0 otherwise
group-ublox 0:19aa55d66228 105 */
group-ublox 0:19aa55d66228 106 uint32_t available(void);
group-ublox 0:19aa55d66228 107
group-ublox 0:19aa55d66228 108 /** Overloaded operator for writing to the buffer
group-ublox 0:19aa55d66228 109 * @param data Something to put in the buffer
group-ublox 0:19aa55d66228 110 * @return
group-ublox 0:19aa55d66228 111 */
group-ublox 0:19aa55d66228 112 MyBuffer &operator= (T data)
group-ublox 0:19aa55d66228 113 {
group-ublox 0:19aa55d66228 114 put(data);
group-ublox 0:19aa55d66228 115 return *this;
group-ublox 0:19aa55d66228 116 }
group-ublox 0:19aa55d66228 117
group-ublox 0:19aa55d66228 118 /** Overloaded operator for reading from the buffer
group-ublox 0:19aa55d66228 119 * @return Pull the oldest element from the buffer
group-ublox 0:19aa55d66228 120 */
group-ublox 0:19aa55d66228 121 operator int(void)
group-ublox 0:19aa55d66228 122 {
group-ublox 0:19aa55d66228 123 return get();
group-ublox 0:19aa55d66228 124 }
group-ublox 0:19aa55d66228 125
group-ublox 0:19aa55d66228 126 uint32_t peek(char c);
group-ublox 0:19aa55d66228 127
group-ublox 0:19aa55d66228 128 };
group-ublox 0:19aa55d66228 129
group-ublox 0:19aa55d66228 130 template <class T>
group-ublox 0:19aa55d66228 131 inline void MyBuffer<T>::put(T data)
group-ublox 0:19aa55d66228 132 {
group-ublox 0:19aa55d66228 133 _buf[_wloc++] = data;
group-ublox 0:19aa55d66228 134 _wloc %= (_size-1);
group-ublox 0:19aa55d66228 135
group-ublox 0:19aa55d66228 136 return;
group-ublox 0:19aa55d66228 137 }
group-ublox 0:19aa55d66228 138
group-ublox 0:19aa55d66228 139 template <class T>
group-ublox 0:19aa55d66228 140 inline T MyBuffer<T>::get(void)
group-ublox 0:19aa55d66228 141 {
group-ublox 0:19aa55d66228 142 T data_pos = _buf[_rloc++];
group-ublox 0:19aa55d66228 143 _rloc %= (_size-1);
group-ublox 0:19aa55d66228 144
group-ublox 0:19aa55d66228 145 return data_pos;
group-ublox 0:19aa55d66228 146 }
group-ublox 0:19aa55d66228 147
group-ublox 0:19aa55d66228 148 template <class T>
group-ublox 0:19aa55d66228 149 inline T *MyBuffer<T>::head(void)
group-ublox 0:19aa55d66228 150 {
group-ublox 0:19aa55d66228 151 T *data_pos = &_buf[0];
group-ublox 0:19aa55d66228 152
group-ublox 0:19aa55d66228 153 return data_pos;
group-ublox 0:19aa55d66228 154 }
group-ublox 0:19aa55d66228 155
group-ublox 0:19aa55d66228 156 template <class T>
group-ublox 0:19aa55d66228 157 inline uint32_t MyBuffer<T>::available(void)
group-ublox 0:19aa55d66228 158 {
group-ublox 0:19aa55d66228 159 return (_wloc == _rloc) ? 0 : 1;
group-ublox 0:19aa55d66228 160 }
group-ublox 0:19aa55d66228 161
group-ublox 0:19aa55d66228 162 #endif
group-ublox 0:19aa55d66228 163