Opencv 3.1 project on GR-PEACH board
Fork of gr-peach-opencv-project by
USBHost_custom/USBHostSerial/CircBufferHostSerial.h@170:54ff26da7eb6, 2017-07-04 (annotated)
- Committer:
- thedo
- Date:
- Tue Jul 04 06:23:13 2017 +0000
- Revision:
- 170:54ff26da7eb6
- Parent:
- 166:3a9487d57a5c
project opencv 3.1 on GR PEACH board, no use SD card.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
thedo | 166:3a9487d57a5c | 1 | /* mbed USBHost Library |
thedo | 166:3a9487d57a5c | 2 | * Copyright (c) 2006-2013 ARM Limited |
thedo | 166:3a9487d57a5c | 3 | * |
thedo | 166:3a9487d57a5c | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
thedo | 166:3a9487d57a5c | 5 | * you may not use this file except in compliance with the License. |
thedo | 166:3a9487d57a5c | 6 | * You may obtain a copy of the License at |
thedo | 166:3a9487d57a5c | 7 | * |
thedo | 166:3a9487d57a5c | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
thedo | 166:3a9487d57a5c | 9 | * |
thedo | 166:3a9487d57a5c | 10 | * Unless required by applicable law or agreed to in writing, software |
thedo | 166:3a9487d57a5c | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
thedo | 166:3a9487d57a5c | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
thedo | 166:3a9487d57a5c | 13 | * See the License for the specific language governing permissions and |
thedo | 166:3a9487d57a5c | 14 | * limitations under the License. |
thedo | 166:3a9487d57a5c | 15 | */ |
thedo | 166:3a9487d57a5c | 16 | |
thedo | 166:3a9487d57a5c | 17 | #ifndef CIRCBUFFERHOSTSERIAL_H |
thedo | 166:3a9487d57a5c | 18 | #define CIRCBUFFERHOSTSERIAL_H |
thedo | 166:3a9487d57a5c | 19 | |
thedo | 166:3a9487d57a5c | 20 | #include "stdint.h" |
thedo | 166:3a9487d57a5c | 21 | |
thedo | 166:3a9487d57a5c | 22 | template<typename T, int size> |
thedo | 166:3a9487d57a5c | 23 | class CircBufferHostSerial { |
thedo | 166:3a9487d57a5c | 24 | public: |
thedo | 166:3a9487d57a5c | 25 | |
thedo | 166:3a9487d57a5c | 26 | CircBufferHostSerial() { |
thedo | 166:3a9487d57a5c | 27 | write = 0; |
thedo | 166:3a9487d57a5c | 28 | read = 0; |
thedo | 166:3a9487d57a5c | 29 | } |
thedo | 166:3a9487d57a5c | 30 | |
thedo | 166:3a9487d57a5c | 31 | bool isFull() { |
thedo | 166:3a9487d57a5c | 32 | return (((write + 1) % size) == read); |
thedo | 166:3a9487d57a5c | 33 | } |
thedo | 166:3a9487d57a5c | 34 | |
thedo | 166:3a9487d57a5c | 35 | bool isEmpty() { |
thedo | 166:3a9487d57a5c | 36 | return (read == write); |
thedo | 166:3a9487d57a5c | 37 | } |
thedo | 166:3a9487d57a5c | 38 | |
thedo | 166:3a9487d57a5c | 39 | void flush() { |
thedo | 166:3a9487d57a5c | 40 | write = 0; |
thedo | 166:3a9487d57a5c | 41 | read = 0; |
thedo | 166:3a9487d57a5c | 42 | } |
thedo | 166:3a9487d57a5c | 43 | |
thedo | 166:3a9487d57a5c | 44 | bool queue(T k) { |
thedo | 166:3a9487d57a5c | 45 | if (isFull()) { |
thedo | 166:3a9487d57a5c | 46 | return false; |
thedo | 166:3a9487d57a5c | 47 | } |
thedo | 166:3a9487d57a5c | 48 | buf[write] = k; |
thedo | 166:3a9487d57a5c | 49 | write = (write + 1) % size; |
thedo | 166:3a9487d57a5c | 50 | return true; |
thedo | 166:3a9487d57a5c | 51 | } |
thedo | 166:3a9487d57a5c | 52 | |
thedo | 166:3a9487d57a5c | 53 | uint32_t available() { |
thedo | 166:3a9487d57a5c | 54 | uint32_t a = (write >= read) ? (write - read) : (size - read + write); |
thedo | 166:3a9487d57a5c | 55 | return a; |
thedo | 166:3a9487d57a5c | 56 | } |
thedo | 166:3a9487d57a5c | 57 | |
thedo | 166:3a9487d57a5c | 58 | bool dequeue(T * c) { |
thedo | 166:3a9487d57a5c | 59 | if (isEmpty()) { |
thedo | 166:3a9487d57a5c | 60 | return false; |
thedo | 166:3a9487d57a5c | 61 | } |
thedo | 166:3a9487d57a5c | 62 | *c = buf[read]; |
thedo | 166:3a9487d57a5c | 63 | read = (read + 1) % size; |
thedo | 166:3a9487d57a5c | 64 | return true; |
thedo | 166:3a9487d57a5c | 65 | } |
thedo | 166:3a9487d57a5c | 66 | |
thedo | 166:3a9487d57a5c | 67 | private: |
thedo | 166:3a9487d57a5c | 68 | volatile uint32_t write; |
thedo | 166:3a9487d57a5c | 69 | volatile uint32_t read; |
thedo | 166:3a9487d57a5c | 70 | volatile T buf[size]; |
thedo | 166:3a9487d57a5c | 71 | }; |
thedo | 166:3a9487d57a5c | 72 | |
thedo | 166:3a9487d57a5c | 73 | #endif |
thedo | 166:3a9487d57a5c | 74 |