USBHost custom library.
Dependents: GR-PEACH_HVC-P2_sample_client mbed-os-storage-access GR-PEACH_Digital_Signage GR-PEACH_Audio_Playback_Sample ... more
Fork of USBHost by
USBHostSerial/CircBufferHostSerial.h
- Committer:
- dkato
- Date:
- 2017-03-14
- Revision:
- 38:dd168a3e4194
File content as of revision 38:dd168a3e4194:
/* mbed USBHost Library * Copyright (c) 2006-2013 ARM Limited * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef CIRCBUFFERHOSTSERIAL_H #define CIRCBUFFERHOSTSERIAL_H #include "stdint.h" template<typename T, int size> class CircBufferHostSerial { public: CircBufferHostSerial() { write = 0; read = 0; } bool isFull() { return (((write + 1) % size) == read); } bool isEmpty() { return (read == write); } void flush() { write = 0; read = 0; } bool queue(T k) { if (isFull()) { return false; } buf[write] = k; write = (write + 1) % size; return true; } uint32_t available() { uint32_t a = (write >= read) ? (write - read) : (size - read + write); return a; } bool dequeue(T * c) { if (isEmpty()) { return false; } *c = buf[read]; read = (read + 1) % size; return true; } private: volatile uint32_t write; volatile uint32_t read; volatile T buf[size]; }; #endif