CRTI_Progs / USBDevice

device USB Samir

Dependents:   USBJoystick_HelloWorld3

Fork of USBDevice by Samuel Mokrani

USBSerial/CircBuffer.h@1:2544b20d1413, 2017-05-10 (annotated)

Committer:
bouaziz
Date:
Wed May 10 20:52:59 2017 +0000
Revision:
1:2544b20d1413
Parent:
0:140cdf8e2d60 
essai clavier emulation

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 0:140cdf8e2d60 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
samux 0:140cdf8e2d60 2 *
samux 0:140cdf8e2d60 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 0:140cdf8e2d60 4 * and associated documentation files (the "Software"), to deal in the Software without
samux 0:140cdf8e2d60 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
samux 0:140cdf8e2d60 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
samux 0:140cdf8e2d60 7 * Software is furnished to do so, subject to the following conditions:
samux 0:140cdf8e2d60 8 *
samux 0:140cdf8e2d60 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 0:140cdf8e2d60 10 * substantial portions of the Software.
samux 0:140cdf8e2d60 11 *
samux 0:140cdf8e2d60 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 0:140cdf8e2d60 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 0:140cdf8e2d60 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 0:140cdf8e2d60 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 0:140cdf8e2d60 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 0:140cdf8e2d60 17 */
samux 0:140cdf8e2d60 18
samux 0:140cdf8e2d60 19 #ifndef CIRCBUFFER_H
samux 0:140cdf8e2d60 20 #define CIRCBUFFER_H
samux 0:140cdf8e2d60 21
samux 0:140cdf8e2d60 22 template <class T>
samux 0:140cdf8e2d60 23 class CircBuffer {
samux 0:140cdf8e2d60 24 public:
samux 0:140cdf8e2d60 25 CircBuffer(int length) {
samux 0:140cdf8e2d60 26 write = 0;
samux 0:140cdf8e2d60 27 read = 0;
samux 0:140cdf8e2d60 28 size = length + 1;
samux 0:140cdf8e2d60 29 buf = (T *)malloc(size * sizeof(T));
samux 0:140cdf8e2d60 30 };
samux 0:140cdf8e2d60 31
samux 0:140cdf8e2d60 32 bool isFull() {
samux 0:140cdf8e2d60 33 return ((write + 1) % size == read);
samux 0:140cdf8e2d60 34 };
samux 0:140cdf8e2d60 35
samux 0:140cdf8e2d60 36 bool isEmpty() {
samux 0:140cdf8e2d60 37 return (read == write);
samux 0:140cdf8e2d60 38 };
samux 0:140cdf8e2d60 39
samux 0:140cdf8e2d60 40 void queue(T k) {
samux 0:140cdf8e2d60 41 if (isFull()) {
samux 0:140cdf8e2d60 42 read++;
samux 0:140cdf8e2d60 43 read %= size;
samux 0:140cdf8e2d60 44 }
samux 0:140cdf8e2d60 45 buf[write++] = k;
samux 0:140cdf8e2d60 46 write %= size;
samux 0:140cdf8e2d60 47 }
samux 0:140cdf8e2d60 48
samux 0:140cdf8e2d60 49 uint16_t available() {
samux 0:140cdf8e2d60 50 return (write >= read) ? write - read : size - read + write;
samux 0:140cdf8e2d60 51 };
samux 0:140cdf8e2d60 52
samux 0:140cdf8e2d60 53 bool dequeue(T * c) {
samux 0:140cdf8e2d60 54 bool empty = isEmpty();
samux 0:140cdf8e2d60 55 if (!empty) {
samux 0:140cdf8e2d60 56 *c = buf[read++];
samux 0:140cdf8e2d60 57 read %= size;
samux 0:140cdf8e2d60 58 }
samux 0:140cdf8e2d60 59 return(!empty);
samux 0:140cdf8e2d60 60 };
samux 0:140cdf8e2d60 61
samux 0:140cdf8e2d60 62 private:
samux 0:140cdf8e2d60 63 volatile uint16_t write;
samux 0:140cdf8e2d60 64 volatile uint16_t read;
samux 0:140cdf8e2d60 65 uint16_t size;
samux 0:140cdf8e2d60 66 T * buf;
samux 0:140cdf8e2d60 67 };
samux 0:140cdf8e2d60 68
samux 0:140cdf8e2d60 69 #endif