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/MtxCircBuffer.h@36:f8c0979c2814, 2017-01-23 (annotated)
- Committer:
- dkato
- Date:
- Mon Jan 23 06:05:50 2017 +0000
- Revision:
- 36:f8c0979c2814
- Parent:
- 24:868cbfe611a7
Removed mbed-rtos so that it can be used with the mbed-os library.
; Partial modification of USBHostSerial.
Who changed what in which revision?
User | Revision | Line number | New 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 |