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USB device stack

Dependents:   mbed-mX-USB-TEST1 USBMSD_SD_HID_HelloWorld HidTest MIDI_usb_bridge ... more

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USBSerial/CircBuffer.h@71:53949e6131f6, 2017-07-27 (annotated)

Committer:
Kojto
Date:
Thu Jul 27 12:14:04 2017 +0100
Revision:
71:53949e6131f6
Parent:
56:151ba33713ff 
Update libraries



Fixes the previous commmit, as some devices were not copied. USBDevice contains

now targets directory with all targets implementations

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
samux 1:80ab0d068708 21
mbed_official 51:deafa44182d9 22 template <class T, int Size>
samux 1:80ab0d068708 23 class CircBuffer {
samux 1:80ab0d068708 24 public:
mbed_official 51:deafa44182d9 25 CircBuffer():write(0), read(0){}
samux 1:80ab0d068708 26 bool isFull() {
samux 1:80ab0d068708 27 return ((write + 1) % size == read);
samux 1:80ab0d068708 28 };
samux 1:80ab0d068708 29
samux 1:80ab0d068708 30 bool isEmpty() {
samux 1:80ab0d068708 31 return (read == write);
samux 1:80ab0d068708 32 };
samux 1:80ab0d068708 33
samux 1:80ab0d068708 34 void queue(T k) {
samux 1:80ab0d068708 35 if (isFull()) {
samux 1:80ab0d068708 36 read++;
samux 1:80ab0d068708 37 read %= size;
samux 1:80ab0d068708 38 }
samux 1:80ab0d068708 39 buf[write++] = k;
samux 1:80ab0d068708 40 write %= size;
samux 1:80ab0d068708 41 }
samux 1:80ab0d068708 42
samux 1:80ab0d068708 43 uint16_t available() {
samux 1:80ab0d068708 44 return (write >= read) ? write - read : size - read + write;
samux 1:80ab0d068708 45 };
samux 1:80ab0d068708 46
samux 1:80ab0d068708 47 bool dequeue(T * c) {
samux 1:80ab0d068708 48 bool empty = isEmpty();
samux 1:80ab0d068708 49 if (!empty) {
samux 1:80ab0d068708 50 *c = buf[read++];
samux 1:80ab0d068708 51 read %= size;
samux 1:80ab0d068708 52 }
samux 1:80ab0d068708 53 return(!empty);
samux 1:80ab0d068708 54 };
samux 1:80ab0d068708 55
samux 1:80ab0d068708 56 private:
samux 1:80ab0d068708 57 volatile uint16_t write;
samux 1:80ab0d068708 58 volatile uint16_t read;
mbed_official 51:deafa44182d9 59 static const int size = Size+1; //a modern optimizer should be able to remove this so it uses no ram.
mbed_official 56:151ba33713ff 60 T buf[Size+1];
samux 1:80ab0d068708 61 };
samux 1:80ab0d068708 62
samux 1:80ab0d068708 63 #endif