Renesas / USBHost_custom_Addiso

Support Isochronous transfer additionally

Dependents:   USBHostC270_example_GR-PEACH USBHostDac_example USBHostDac_Audio_in_out

Fork of USBHost_custom by Renesas

USBHostSerial/MtxCircBuffer.h@41:5c3ebf7372ee, 2017-04-21 (annotated)

Committer:
HinoNaka
Date:
Fri Apr 21 07:23:33 2017 +0000
Revision:
41:5c3ebf7372ee
Parent:
36:f8c0979c2814 
Support Isochronous transfer

Who changed what in which revision?

UserRevisionLine numberNew contents of line
samux 8:93da8ea2708b 1 /* mbed USBHost Library
samux 8:93da8ea2708b 2 * Copyright (c) 2006-2013 ARM Limited
samux 8:93da8ea2708b 3 *
samux 8:93da8ea2708b 4 * Licensed under the Apache License, Version 2.0 (the "License");
samux 8:93da8ea2708b 5 * you may not use this file except in compliance with the License.
samux 8:93da8ea2708b 6 * You may obtain a copy of the License at
samux 8:93da8ea2708b 7 *
samux 8:93da8ea2708b 8 * http://www.apache.org/licenses/LICENSE-2.0
samux 8:93da8ea2708b 9 *
samux 8:93da8ea2708b 10 * Unless required by applicable law or agreed to in writing, software
samux 8:93da8ea2708b 11 * distributed under the License is distributed on an "AS IS" BASIS,
samux 8:93da8ea2708b 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
samux 8:93da8ea2708b 13 * See the License for the specific language governing permissions and
samux 8:93da8ea2708b 14 * limitations under the License.
samux 8:93da8ea2708b 15 */
mbed_official 0:a554658735bf 16
mbed_official 0:a554658735bf 17 #ifndef MTXCIRCBUFFER_H
mbed_official 0:a554658735bf 18 #define MTXCIRCBUFFER_H
mbed_official 0:a554658735bf 19
mbed_official 0:a554658735bf 20 #include "stdint.h"
mbed_official 0:a554658735bf 21
mbed_official 0:a554658735bf 22 //Mutex protected circular buffer
mbed_official 0:a554658735bf 23 template<typename T, int size>
mbed_official 0:a554658735bf 24 class MtxCircBuffer {
mbed_official 0:a554658735bf 25 public:
mbed_official 24:868cbfe611a7 26
mbed_official 0:a554658735bf 27 MtxCircBuffer() {
mbed_official 0:a554658735bf 28 write = 0;
mbed_official 0:a554658735bf 29 read = 0;
mbed_official 0:a554658735bf 30 }
mbed_official 0:a554658735bf 31
mbed_official 0:a554658735bf 32 bool isFull() {
dkato 36:f8c0979c2814 33 return (((write + 1) % size) == read);
mbed_official 0:a554658735bf 34 }
mbed_official 0:a554658735bf 35
mbed_official 0:a554658735bf 36 bool isEmpty() {
dkato 36:f8c0979c2814 37 return (read == write);
mbed_official 0:a554658735bf 38 }
mbed_official 24:868cbfe611a7 39
samux 4:b320d68e98e7 40 void flush() {
samux 4:b320d68e98e7 41 write = 0;
samux 4:b320d68e98e7 42 read = 0;
samux 4:b320d68e98e7 43 }
mbed_official 0:a554658735bf 44
dkato 36:f8c0979c2814 45 bool queue(T k) {
dkato 36:f8c0979c2814 46 if (isFull()) {
dkato 36:f8c0979c2814 47 return false;
mbed_official 0:a554658735bf 48 }
dkato 36:f8c0979c2814 49 buf[write] = k;
dkato 36:f8c0979c2814 50 write = (write + 1) % size;
dkato 36:f8c0979c2814 51 return true;
mbed_official 0:a554658735bf 52 }
mbed_official 0:a554658735bf 53
dkato 36:f8c0979c2814 54 uint32_t available() {
dkato 36:f8c0979c2814 55 uint32_t a = (write >= read) ? (write - read) : (size - read + write);
mbed_official 0:a554658735bf 56 return a;
mbed_official 0:a554658735bf 57 }
mbed_official 0:a554658735bf 58
mbed_official 0:a554658735bf 59 bool dequeue(T * c) {
dkato 36:f8c0979c2814 60 if (isEmpty()) {
dkato 36:f8c0979c2814 61 return false;
mbed_official 0:a554658735bf 62 }
dkato 36:f8c0979c2814 63 *c = buf[read];
dkato 36:f8c0979c2814 64 read = (read + 1) % size;
dkato 36:f8c0979c2814 65 return true;
mbed_official 0:a554658735bf 66 }
mbed_official 0:a554658735bf 67
mbed_official 0:a554658735bf 68 private:
dkato 36:f8c0979c2814 69 volatile uint32_t write;
dkato 36:f8c0979c2814 70 volatile uint32_t read;
mbed_official 0:a554658735bf 71 volatile T buf[size];
mbed_official 0:a554658735bf 72 };
mbed_official 0:a554658735bf 73
mbed_official 0:a554658735bf 74 #endif
dkato 36:f8c0979c2814 75