不韋 呂 / F746_AcousticEffector_MIC

Audio singal input and output example for DISCO-F746. Input: MEMS mic, Output: CN10 OUT, Acoustic effect: echo and frequency shift. DISCO-F746 によるオーディオ信号入出力．入力：MEMS マイク，出力：CN10 OUT，音響効果：エコー，周波数変換．

Dependencies:   F746_GUI F746_SAI_IO

mbed_src_STM32F7/api/FileHandle.h@10:56f2f01df983, 2017-04-10 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Apr 10 13:44:13 2017 +0000
Revision:
10:56f2f01df983
Parent:
6:38f7dce055d0 
11

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 6:38f7dce055d0 1 /* mbed Microcontroller Library
MikamiUitOpen 6:38f7dce055d0 2 * Copyright (c) 2006-2013 ARM Limited
MikamiUitOpen 6:38f7dce055d0 3 *
MikamiUitOpen 6:38f7dce055d0 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 6:38f7dce055d0 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 6:38f7dce055d0 6 * You may obtain a copy of the License at
MikamiUitOpen 6:38f7dce055d0 7 *
MikamiUitOpen 6:38f7dce055d0 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 6:38f7dce055d0 9 *
MikamiUitOpen 6:38f7dce055d0 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 6:38f7dce055d0 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 6:38f7dce055d0 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 6:38f7dce055d0 13 * See the License for the specific language governing permissions and
MikamiUitOpen 6:38f7dce055d0 14 * limitations under the License.
MikamiUitOpen 6:38f7dce055d0 15 */
MikamiUitOpen 6:38f7dce055d0 16 #ifndef MBED_FILEHANDLE_H
MikamiUitOpen 6:38f7dce055d0 17 #define MBED_FILEHANDLE_H
MikamiUitOpen 6:38f7dce055d0 18
MikamiUitOpen 6:38f7dce055d0 19 typedef int FILEHANDLE;
MikamiUitOpen 6:38f7dce055d0 20
MikamiUitOpen 6:38f7dce055d0 21 #include <stdio.h>
MikamiUitOpen 6:38f7dce055d0 22
MikamiUitOpen 6:38f7dce055d0 23 #if defined(__ARMCC_VERSION) || defined(__ICCARM__)
MikamiUitOpen 6:38f7dce055d0 24 typedef int ssize_t;
MikamiUitOpen 6:38f7dce055d0 25 typedef long off_t;
MikamiUitOpen 6:38f7dce055d0 26
MikamiUitOpen 6:38f7dce055d0 27 #else
MikamiUitOpen 6:38f7dce055d0 28 # include <sys/types.h>
MikamiUitOpen 6:38f7dce055d0 29 #endif
MikamiUitOpen 6:38f7dce055d0 30
MikamiUitOpen 6:38f7dce055d0 31 namespace mbed {
MikamiUitOpen 6:38f7dce055d0 32
MikamiUitOpen 6:38f7dce055d0 33 /** An OO equivalent of the internal FILEHANDLE variable
MikamiUitOpen 6:38f7dce055d0 34 * and associated _sys_* functions.
MikamiUitOpen 6:38f7dce055d0 35 *
MikamiUitOpen 6:38f7dce055d0 36 * FileHandle is an abstract class, needing at least sys_write and
MikamiUitOpen 6:38f7dce055d0 37 * sys_read to be implmented for a simple interactive device.
MikamiUitOpen 6:38f7dce055d0 38 *
MikamiUitOpen 6:38f7dce055d0 39 * No one ever directly tals to/instanciates a FileHandle - it gets
MikamiUitOpen 6:38f7dce055d0 40 * created by FileSystem, and wrapped up by stdio.
MikamiUitOpen 6:38f7dce055d0 41 */
MikamiUitOpen 6:38f7dce055d0 42 class FileHandle {
MikamiUitOpen 6:38f7dce055d0 43
MikamiUitOpen 6:38f7dce055d0 44 public:
MikamiUitOpen 6:38f7dce055d0 45 /** Write the contents of a buffer to the file
MikamiUitOpen 6:38f7dce055d0 46 *
MikamiUitOpen 6:38f7dce055d0 47 * @param buffer the buffer to write from
MikamiUitOpen 6:38f7dce055d0 48 * @param length the number of characters to write
MikamiUitOpen 6:38f7dce055d0 49 *
MikamiUitOpen 6:38f7dce055d0 50 * @returns
MikamiUitOpen 6:38f7dce055d0 51 * The number of characters written (possibly 0) on success, -1 on error.
MikamiUitOpen 6:38f7dce055d0 52 */
MikamiUitOpen 6:38f7dce055d0 53 virtual ssize_t write(const void* buffer, size_t length) = 0;
MikamiUitOpen 6:38f7dce055d0 54
MikamiUitOpen 6:38f7dce055d0 55 /** Close the file
MikamiUitOpen 6:38f7dce055d0 56 *
MikamiUitOpen 6:38f7dce055d0 57 * @returns
MikamiUitOpen 6:38f7dce055d0 58 * Zero on success, -1 on error.
MikamiUitOpen 6:38f7dce055d0 59 */
MikamiUitOpen 6:38f7dce055d0 60 virtual int close() = 0;
MikamiUitOpen 6:38f7dce055d0 61
MikamiUitOpen 6:38f7dce055d0 62 /** Function read
MikamiUitOpen 6:38f7dce055d0 63 * Reads the contents of the file into a buffer
MikamiUitOpen 6:38f7dce055d0 64 *
MikamiUitOpen 6:38f7dce055d0 65 * @param buffer the buffer to read in to
MikamiUitOpen 6:38f7dce055d0 66 * @param length the number of characters to read
MikamiUitOpen 6:38f7dce055d0 67 *
MikamiUitOpen 6:38f7dce055d0 68 * @returns
MikamiUitOpen 6:38f7dce055d0 69 * The number of characters read (zero at end of file) on success, -1 on error.
MikamiUitOpen 6:38f7dce055d0 70 */
MikamiUitOpen 6:38f7dce055d0 71 virtual ssize_t read(void* buffer, size_t length) = 0;
MikamiUitOpen 6:38f7dce055d0 72
MikamiUitOpen 6:38f7dce055d0 73 /** Check if the handle is for a interactive terminal device.
MikamiUitOpen 6:38f7dce055d0 74 * If so, line buffered behaviour is used by default
MikamiUitOpen 6:38f7dce055d0 75 *
MikamiUitOpen 6:38f7dce055d0 76 * @returns
MikamiUitOpen 6:38f7dce055d0 77 * 1 if it is a terminal,
MikamiUitOpen 6:38f7dce055d0 78 * 0 otherwise
MikamiUitOpen 6:38f7dce055d0 79 */
MikamiUitOpen 6:38f7dce055d0 80 virtual int isatty() = 0;
MikamiUitOpen 6:38f7dce055d0 81
MikamiUitOpen 6:38f7dce055d0 82 /** Move the file position to a given offset from a given location.
MikamiUitOpen 6:38f7dce055d0 83 *
MikamiUitOpen 6:38f7dce055d0 84 * @param offset The offset from whence to move to
MikamiUitOpen 6:38f7dce055d0 85 * @param whence SEEK_SET for the start of the file, SEEK_CUR for the
MikamiUitOpen 6:38f7dce055d0 86 * current file position, or SEEK_END for the end of the file.
MikamiUitOpen 6:38f7dce055d0 87 *
MikamiUitOpen 6:38f7dce055d0 88 * @returns
MikamiUitOpen 6:38f7dce055d0 89 * new file position on success,
MikamiUitOpen 6:38f7dce055d0 90 * -1 on failure or unsupported
MikamiUitOpen 6:38f7dce055d0 91 */
MikamiUitOpen 6:38f7dce055d0 92 virtual off_t lseek(off_t offset, int whence) = 0;
MikamiUitOpen 6:38f7dce055d0 93
MikamiUitOpen 6:38f7dce055d0 94 /** Flush any buffers associated with the FileHandle, ensuring it
MikamiUitOpen 6:38f7dce055d0 95 * is up to date on disk
MikamiUitOpen 6:38f7dce055d0 96 *
MikamiUitOpen 6:38f7dce055d0 97 * @returns
MikamiUitOpen 6:38f7dce055d0 98 * 0 on success or un-needed,
MikamiUitOpen 6:38f7dce055d0 99 * -1 on error
MikamiUitOpen 6:38f7dce055d0 100 */
MikamiUitOpen 6:38f7dce055d0 101 virtual int fsync() = 0;
MikamiUitOpen 6:38f7dce055d0 102
MikamiUitOpen 6:38f7dce055d0 103 virtual off_t flen() {
MikamiUitOpen 6:38f7dce055d0 104 /* remember our current position */
MikamiUitOpen 6:38f7dce055d0 105 off_t pos = lseek(0, SEEK_CUR);
MikamiUitOpen 6:38f7dce055d0 106 if(pos == -1) return -1;
MikamiUitOpen 6:38f7dce055d0 107 /* seek to the end to get the file length */
MikamiUitOpen 6:38f7dce055d0 108 off_t res = lseek(0, SEEK_END);
MikamiUitOpen 6:38f7dce055d0 109 /* return to our old position */
MikamiUitOpen 6:38f7dce055d0 110 lseek(pos, SEEK_SET);
MikamiUitOpen 6:38f7dce055d0 111 return res;
MikamiUitOpen 6:38f7dce055d0 112 }
MikamiUitOpen 6:38f7dce055d0 113
MikamiUitOpen 6:38f7dce055d0 114 virtual ~FileHandle();
MikamiUitOpen 6:38f7dce055d0 115 };
MikamiUitOpen 6:38f7dce055d0 116
MikamiUitOpen 6:38f7dce055d0 117 } // namespace mbed
MikamiUitOpen 6:38f7dce055d0 118
MikamiUitOpen 6:38f7dce055d0 119 #endif