Mike R / USBDevice

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependents:   frdm_Slider_Keyboard idd_hw2_figlax_PanType idd_hw2_appachu_finger_chording idd_hw3_AngieWangAntonioDeLimaFernandesDanielLim_BladeSymphony ... more

Fork of USBDevice by mbed official

USBSerial/CircBuffer.h@54:2e181d51495a, 2017-03-17 (annotated)

Committer:
mjr
Date:
Fri Mar 17 22:01:47 2017 +0000
Revision:
54:2e181d51495a
Parent:
49:03527ce6840e 
Comments

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 1:80ab0d068708 1 /* Copyright (c) 2010-2011 mbed.org, MIT License
samux 1:80ab0d068708 2 *
samux 1:80ab0d068708 3 * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
samux 1:80ab0d068708 4 * and associated documentation files (the "Software"), to deal in the Software without
samux 1:80ab0d068708 5 * restriction, including without limitation the rights to use, copy, modify, merge, publish,
samux 1:80ab0d068708 6 * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the
samux 1:80ab0d068708 7 * Software is furnished to do so, subject to the following conditions:
samux 1:80ab0d068708 8 *
samux 1:80ab0d068708 9 * The above copyright notice and this permission notice shall be included in all copies or
samux 1:80ab0d068708 10 * substantial portions of the Software.
samux 1:80ab0d068708 11 *
samux 1:80ab0d068708 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
samux 1:80ab0d068708 13 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
samux 1:80ab0d068708 14 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
samux 1:80ab0d068708 15 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
samux 1:80ab0d068708 16 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
samux 1:80ab0d068708 17 */
samux 1:80ab0d068708 18
samux 1:80ab0d068708 19 #ifndef CIRCBUFFER_H
samux 1:80ab0d068708 20 #define CIRCBUFFER_H
mjr 49:03527ce6840e 21 #include "pinscape.h"
samux 1:80ab0d068708 22
samux 1:80ab0d068708 23 template <class T>
samux 1:80ab0d068708 24 class CircBuffer {
samux 1:80ab0d068708 25 public:
samux 1:80ab0d068708 26 CircBuffer(int length) {
samux 1:80ab0d068708 27 write = 0;
samux 1:80ab0d068708 28 read = 0;
samux 1:80ab0d068708 29 size = length + 1;
mjr 49:03527ce6840e 30 buf = new T[size];
samux 1:80ab0d068708 31 };
samux 1:80ab0d068708 32
bogdanm 14:d495202c90f4 33 ~CircBuffer() {
mjr 49:03527ce6840e 34 delete [] buf;
bogdanm 14:d495202c90f4 35 }
bogdanm 14:d495202c90f4 36
samux 1:80ab0d068708 37 bool isFull() {
samux 1:80ab0d068708 38 return ((write + 1) % size == read);
samux 1:80ab0d068708 39 };
samux 1:80ab0d068708 40
samux 1:80ab0d068708 41 bool isEmpty() {
samux 1:80ab0d068708 42 return (read == write);
samux 1:80ab0d068708 43 };
samux 1:80ab0d068708 44
samux 1:80ab0d068708 45 void queue(T k) {
samux 1:80ab0d068708 46 if (isFull()) {
samux 1:80ab0d068708 47 read++;
samux 1:80ab0d068708 48 read %= size;
samux 1:80ab0d068708 49 }
samux 1:80ab0d068708 50 buf[write++] = k;
samux 1:80ab0d068708 51 write %= size;
samux 1:80ab0d068708 52 }
samux 1:80ab0d068708 53
samux 1:80ab0d068708 54 uint16_t available() {
samux 1:80ab0d068708 55 return (write >= read) ? write - read : size - read + write;
samux 1:80ab0d068708 56 };
samux 1:80ab0d068708 57
samux 1:80ab0d068708 58 bool dequeue(T * c) {
samux 1:80ab0d068708 59 bool empty = isEmpty();
samux 1:80ab0d068708 60 if (!empty) {
samux 1:80ab0d068708 61 *c = buf[read++];
samux 1:80ab0d068708 62 read %= size;
samux 1:80ab0d068708 63 }
samux 1:80ab0d068708 64 return(!empty);
samux 1:80ab0d068708 65 };
samux 1:80ab0d068708 66
samux 1:80ab0d068708 67 private:
samux 1:80ab0d068708 68 volatile uint16_t write;
samux 1:80ab0d068708 69 volatile uint16_t read;
samux 1:80ab0d068708 70 uint16_t size;
samux 1:80ab0d068708 71 T * buf;
samux 1:80ab0d068708 72 };
samux 1:80ab0d068708 73
samux 1:80ab0d068708 74 #endif