ON Semiconductor / mbed-os

5.2.1 - Updated I2C files

Dependents:   mbed-TFT-example-NCS36510 mbed-Accelerometer-example-NCS36510 mbed-Accelerometer-example-NCS36510

drivers/LocalFileSystem.cpp@0:098463de4c5d, 2017-01-25 (annotated)

Committer:
group-onsemi
Date:
Wed Jan 25 20:34:15 2017 +0000
Revision:
0:098463de4c5d
Initial commit

Who changed what in which revision?

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group-onsemi 0:098463de4c5d 1 /* mbed Microcontroller Library
group-onsemi 0:098463de4c5d 2 * Copyright (c) 2006-2013 ARM Limited
group-onsemi 0:098463de4c5d 3 *
group-onsemi 0:098463de4c5d 4 * Licensed under the Apache License, Version 2.0 (the "License");
group-onsemi 0:098463de4c5d 5 * you may not use this file except in compliance with the License.
group-onsemi 0:098463de4c5d 6 * You may obtain a copy of the License at
group-onsemi 0:098463de4c5d 7 *
group-onsemi 0:098463de4c5d 8 * http://www.apache.org/licenses/LICENSE-2.0
group-onsemi 0:098463de4c5d 9 *
group-onsemi 0:098463de4c5d 10 * Unless required by applicable law or agreed to in writing, software
group-onsemi 0:098463de4c5d 11 * distributed under the License is distributed on an "AS IS" BASIS,
group-onsemi 0:098463de4c5d 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
group-onsemi 0:098463de4c5d 13 * See the License for the specific language governing permissions and
group-onsemi 0:098463de4c5d 14 * limitations under the License.
group-onsemi 0:098463de4c5d 15 */
group-onsemi 0:098463de4c5d 16 #include "drivers/LocalFileSystem.h"
group-onsemi 0:098463de4c5d 17
group-onsemi 0:098463de4c5d 18 #if DEVICE_LOCALFILESYSTEM
group-onsemi 0:098463de4c5d 19
group-onsemi 0:098463de4c5d 20 #include "platform/semihost_api.h"
group-onsemi 0:098463de4c5d 21 #include <string.h>
group-onsemi 0:098463de4c5d 22 #include <stdio.h>
group-onsemi 0:098463de4c5d 23
group-onsemi 0:098463de4c5d 24 namespace mbed {
group-onsemi 0:098463de4c5d 25
group-onsemi 0:098463de4c5d 26 /* Extension to FINFO type defined in RTL.h (in Keil RL) - adds 'create time'. */
group-onsemi 0:098463de4c5d 27 typedef struct {
group-onsemi 0:098463de4c5d 28 unsigned char hr; /* Hours [0..23] */
group-onsemi 0:098463de4c5d 29 unsigned char min; /* Minutes [0..59] */
group-onsemi 0:098463de4c5d 30 unsigned char sec; /* Seconds [0..59] */
group-onsemi 0:098463de4c5d 31 unsigned char day; /* Day [1..31] */
group-onsemi 0:098463de4c5d 32 unsigned char mon; /* Month [1..12] */
group-onsemi 0:098463de4c5d 33 unsigned short year; /* Year [1980..2107] */
group-onsemi 0:098463de4c5d 34 } FTIME;
group-onsemi 0:098463de4c5d 35
group-onsemi 0:098463de4c5d 36 typedef struct { /* File Search info record */
group-onsemi 0:098463de4c5d 37 char name[32]; /* File name */
group-onsemi 0:098463de4c5d 38 long size; /* File size in bytes */
group-onsemi 0:098463de4c5d 39 int fileID; /* System File Identification */
group-onsemi 0:098463de4c5d 40 FTIME create_time; /* Date & time file was created */
group-onsemi 0:098463de4c5d 41 FTIME write_time; /* Date & time of last write */
group-onsemi 0:098463de4c5d 42 } XFINFO;
group-onsemi 0:098463de4c5d 43
group-onsemi 0:098463de4c5d 44 #define RESERVED_FOR_USER_APPLICATIONS (0x100) /* 0x100 - 0x1ff */
group-onsemi 0:098463de4c5d 45 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
group-onsemi 0:098463de4c5d 46
group-onsemi 0:098463de4c5d 47 static int xffind (const char *pattern, XFINFO *info) {
group-onsemi 0:098463de4c5d 48 unsigned param[4];
group-onsemi 0:098463de4c5d 49
group-onsemi 0:098463de4c5d 50 param[0] = (unsigned long)pattern;
group-onsemi 0:098463de4c5d 51 param[1] = (unsigned long)strlen(pattern);
group-onsemi 0:098463de4c5d 52 param[2] = (unsigned long)info;
group-onsemi 0:098463de4c5d 53 param[3] = (unsigned long)sizeof(XFINFO);
group-onsemi 0:098463de4c5d 54
group-onsemi 0:098463de4c5d 55 return __semihost(USR_XFFIND, param);
group-onsemi 0:098463de4c5d 56 }
group-onsemi 0:098463de4c5d 57
group-onsemi 0:098463de4c5d 58 #define OPEN_R 0
group-onsemi 0:098463de4c5d 59 #define OPEN_B 1
group-onsemi 0:098463de4c5d 60 #define OPEN_PLUS 2
group-onsemi 0:098463de4c5d 61 #define OPEN_W 4
group-onsemi 0:098463de4c5d 62 #define OPEN_A 8
group-onsemi 0:098463de4c5d 63 #define OPEN_INVALID -1
group-onsemi 0:098463de4c5d 64
group-onsemi 0:098463de4c5d 65 int posix_to_semihost_open_flags(int flags) {
group-onsemi 0:098463de4c5d 66 /* POSIX flags -> semihosting open mode */
group-onsemi 0:098463de4c5d 67 int openmode;
group-onsemi 0:098463de4c5d 68 if (flags & O_RDWR) {
group-onsemi 0:098463de4c5d 69 /* a plus mode */
group-onsemi 0:098463de4c5d 70 openmode = OPEN_PLUS;
group-onsemi 0:098463de4c5d 71 if (flags & O_APPEND) {
group-onsemi 0:098463de4c5d 72 openmode |= OPEN_A;
group-onsemi 0:098463de4c5d 73 } else if (flags & O_TRUNC) {
group-onsemi 0:098463de4c5d 74 openmode |= OPEN_W;
group-onsemi 0:098463de4c5d 75 } else {
group-onsemi 0:098463de4c5d 76 openmode |= OPEN_R;
group-onsemi 0:098463de4c5d 77 }
group-onsemi 0:098463de4c5d 78 } else if (flags & O_WRONLY) {
group-onsemi 0:098463de4c5d 79 /* write or append */
group-onsemi 0:098463de4c5d 80 if (flags & O_APPEND) {
group-onsemi 0:098463de4c5d 81 openmode = OPEN_A;
group-onsemi 0:098463de4c5d 82 } else {
group-onsemi 0:098463de4c5d 83 openmode = OPEN_W;
group-onsemi 0:098463de4c5d 84 }
group-onsemi 0:098463de4c5d 85 } else if (flags == O_RDONLY) {
group-onsemi 0:098463de4c5d 86 /* read mode */
group-onsemi 0:098463de4c5d 87 openmode = OPEN_R;
group-onsemi 0:098463de4c5d 88 } else {
group-onsemi 0:098463de4c5d 89 /* invalid flags */
group-onsemi 0:098463de4c5d 90 openmode = OPEN_INVALID;
group-onsemi 0:098463de4c5d 91 }
group-onsemi 0:098463de4c5d 92
group-onsemi 0:098463de4c5d 93 return openmode;
group-onsemi 0:098463de4c5d 94 }
group-onsemi 0:098463de4c5d 95
group-onsemi 0:098463de4c5d 96 FILEHANDLE local_file_open(const char* name, int flags) {
group-onsemi 0:098463de4c5d 97 int openmode = posix_to_semihost_open_flags(flags);
group-onsemi 0:098463de4c5d 98 if (openmode == OPEN_INVALID) {
group-onsemi 0:098463de4c5d 99 return (FILEHANDLE)NULL;
group-onsemi 0:098463de4c5d 100 }
group-onsemi 0:098463de4c5d 101
group-onsemi 0:098463de4c5d 102 FILEHANDLE fh = semihost_open(name, openmode);
group-onsemi 0:098463de4c5d 103 if (fh == -1) {
group-onsemi 0:098463de4c5d 104 return (FILEHANDLE)NULL;
group-onsemi 0:098463de4c5d 105 }
group-onsemi 0:098463de4c5d 106
group-onsemi 0:098463de4c5d 107 return fh;
group-onsemi 0:098463de4c5d 108 }
group-onsemi 0:098463de4c5d 109
group-onsemi 0:098463de4c5d 110 LocalFileHandle::LocalFileHandle(FILEHANDLE fh) : _fh(fh), pos(0) {
group-onsemi 0:098463de4c5d 111 // No lock needed in constructor
group-onsemi 0:098463de4c5d 112 }
group-onsemi 0:098463de4c5d 113
group-onsemi 0:098463de4c5d 114 int LocalFileHandle::close() {
group-onsemi 0:098463de4c5d 115 int retval = semihost_close(_fh);
group-onsemi 0:098463de4c5d 116 delete this;
group-onsemi 0:098463de4c5d 117 return retval;
group-onsemi 0:098463de4c5d 118 }
group-onsemi 0:098463de4c5d 119
group-onsemi 0:098463de4c5d 120 ssize_t LocalFileHandle::write(const void *buffer, size_t length) {
group-onsemi 0:098463de4c5d 121 lock();
group-onsemi 0:098463de4c5d 122 ssize_t n = semihost_write(_fh, (const unsigned char*)buffer, length, 0); // number of characters not written
group-onsemi 0:098463de4c5d 123 n = length - n; // number of characters written
group-onsemi 0:098463de4c5d 124 pos += n;
group-onsemi 0:098463de4c5d 125 unlock();
group-onsemi 0:098463de4c5d 126 return n;
group-onsemi 0:098463de4c5d 127 }
group-onsemi 0:098463de4c5d 128
group-onsemi 0:098463de4c5d 129 ssize_t LocalFileHandle::read(void *buffer, size_t length) {
group-onsemi 0:098463de4c5d 130 lock();
group-onsemi 0:098463de4c5d 131 ssize_t n = semihost_read(_fh, (unsigned char*)buffer, length, 0); // number of characters not read
group-onsemi 0:098463de4c5d 132 n = length - n; // number of characters read
group-onsemi 0:098463de4c5d 133 pos += n;
group-onsemi 0:098463de4c5d 134 unlock();
group-onsemi 0:098463de4c5d 135 return n;
group-onsemi 0:098463de4c5d 136 }
group-onsemi 0:098463de4c5d 137
group-onsemi 0:098463de4c5d 138 int LocalFileHandle::isatty() {
group-onsemi 0:098463de4c5d 139 lock();
group-onsemi 0:098463de4c5d 140 int ret = semihost_istty(_fh);
group-onsemi 0:098463de4c5d 141 unlock();
group-onsemi 0:098463de4c5d 142 return ret;
group-onsemi 0:098463de4c5d 143 }
group-onsemi 0:098463de4c5d 144
group-onsemi 0:098463de4c5d 145 off_t LocalFileHandle::lseek(off_t position, int whence) {
group-onsemi 0:098463de4c5d 146 lock();
group-onsemi 0:098463de4c5d 147 if (whence == SEEK_CUR) {
group-onsemi 0:098463de4c5d 148 position += pos;
group-onsemi 0:098463de4c5d 149 } else if (whence == SEEK_END) {
group-onsemi 0:098463de4c5d 150 position += semihost_flen(_fh);
group-onsemi 0:098463de4c5d 151 } /* otherwise SEEK_SET, so position is fine */
group-onsemi 0:098463de4c5d 152
group-onsemi 0:098463de4c5d 153 /* Always seems to return -1, so just ignore for now. */
group-onsemi 0:098463de4c5d 154 semihost_seek(_fh, position);
group-onsemi 0:098463de4c5d 155 pos = position;
group-onsemi 0:098463de4c5d 156 unlock();
group-onsemi 0:098463de4c5d 157 return position;
group-onsemi 0:098463de4c5d 158 }
group-onsemi 0:098463de4c5d 159
group-onsemi 0:098463de4c5d 160 int LocalFileHandle::fsync() {
group-onsemi 0:098463de4c5d 161 lock();
group-onsemi 0:098463de4c5d 162 int ret = semihost_ensure(_fh);
group-onsemi 0:098463de4c5d 163 unlock();
group-onsemi 0:098463de4c5d 164 return ret;
group-onsemi 0:098463de4c5d 165 }
group-onsemi 0:098463de4c5d 166
group-onsemi 0:098463de4c5d 167 off_t LocalFileHandle::flen() {
group-onsemi 0:098463de4c5d 168 lock();
group-onsemi 0:098463de4c5d 169 off_t off = semihost_flen(_fh);
group-onsemi 0:098463de4c5d 170 unlock();
group-onsemi 0:098463de4c5d 171 return off;
group-onsemi 0:098463de4c5d 172 }
group-onsemi 0:098463de4c5d 173
group-onsemi 0:098463de4c5d 174 void LocalFileHandle::lock() {
group-onsemi 0:098463de4c5d 175 _mutex.lock();
group-onsemi 0:098463de4c5d 176 }
group-onsemi 0:098463de4c5d 177
group-onsemi 0:098463de4c5d 178 void LocalFileHandle::unlock() {
group-onsemi 0:098463de4c5d 179 _mutex.unlock();
group-onsemi 0:098463de4c5d 180 }
group-onsemi 0:098463de4c5d 181
group-onsemi 0:098463de4c5d 182 class LocalDirHandle : public DirHandle {
group-onsemi 0:098463de4c5d 183
group-onsemi 0:098463de4c5d 184 public:
group-onsemi 0:098463de4c5d 185 struct dirent cur_entry;
group-onsemi 0:098463de4c5d 186 XFINFO info;
group-onsemi 0:098463de4c5d 187
group-onsemi 0:098463de4c5d 188 LocalDirHandle() : cur_entry(), info() {
group-onsemi 0:098463de4c5d 189 }
group-onsemi 0:098463de4c5d 190
group-onsemi 0:098463de4c5d 191 virtual int closedir() {
group-onsemi 0:098463de4c5d 192 // No lock can be used in destructor
group-onsemi 0:098463de4c5d 193 delete this;
group-onsemi 0:098463de4c5d 194 return 0;
group-onsemi 0:098463de4c5d 195 }
group-onsemi 0:098463de4c5d 196
group-onsemi 0:098463de4c5d 197 virtual struct dirent *readdir() {
group-onsemi 0:098463de4c5d 198 lock();
group-onsemi 0:098463de4c5d 199 if (xffind("*", &info)!=0) {
group-onsemi 0:098463de4c5d 200 unlock();
group-onsemi 0:098463de4c5d 201 return NULL;
group-onsemi 0:098463de4c5d 202 }
group-onsemi 0:098463de4c5d 203 memcpy(cur_entry.d_name, info.name, sizeof(info.name));
group-onsemi 0:098463de4c5d 204 unlock();
group-onsemi 0:098463de4c5d 205 return &cur_entry;
group-onsemi 0:098463de4c5d 206 }
group-onsemi 0:098463de4c5d 207
group-onsemi 0:098463de4c5d 208 virtual void rewinddir() {
group-onsemi 0:098463de4c5d 209 lock();
group-onsemi 0:098463de4c5d 210 info.fileID = 0;
group-onsemi 0:098463de4c5d 211 unlock();
group-onsemi 0:098463de4c5d 212 }
group-onsemi 0:098463de4c5d 213
group-onsemi 0:098463de4c5d 214 virtual off_t telldir() {
group-onsemi 0:098463de4c5d 215 lock();
group-onsemi 0:098463de4c5d 216 int fileId = info.fileID;
group-onsemi 0:098463de4c5d 217 unlock();
group-onsemi 0:098463de4c5d 218 return fileId;
group-onsemi 0:098463de4c5d 219 }
group-onsemi 0:098463de4c5d 220
group-onsemi 0:098463de4c5d 221 virtual void seekdir(off_t offset) {
group-onsemi 0:098463de4c5d 222 lock();
group-onsemi 0:098463de4c5d 223 info.fileID = offset;
group-onsemi 0:098463de4c5d 224 unlock();
group-onsemi 0:098463de4c5d 225 }
group-onsemi 0:098463de4c5d 226
group-onsemi 0:098463de4c5d 227 protected:
group-onsemi 0:098463de4c5d 228 PlatformMutex _mutex;
group-onsemi 0:098463de4c5d 229
group-onsemi 0:098463de4c5d 230 virtual void lock() {
group-onsemi 0:098463de4c5d 231 _mutex.lock();
group-onsemi 0:098463de4c5d 232 }
group-onsemi 0:098463de4c5d 233
group-onsemi 0:098463de4c5d 234 virtual void unlock() {
group-onsemi 0:098463de4c5d 235 _mutex.unlock();
group-onsemi 0:098463de4c5d 236 }
group-onsemi 0:098463de4c5d 237 };
group-onsemi 0:098463de4c5d 238
group-onsemi 0:098463de4c5d 239 FileHandle *LocalFileSystem::open(const char* name, int flags) {
group-onsemi 0:098463de4c5d 240 // No global state modified so function is thread safe
group-onsemi 0:098463de4c5d 241
group-onsemi 0:098463de4c5d 242 /* reject filenames with / in them */
group-onsemi 0:098463de4c5d 243 for (const char *tmp = name; *tmp; tmp++) {
group-onsemi 0:098463de4c5d 244 if (*tmp == '/') {
group-onsemi 0:098463de4c5d 245 return NULL;
group-onsemi 0:098463de4c5d 246 }
group-onsemi 0:098463de4c5d 247 }
group-onsemi 0:098463de4c5d 248
group-onsemi 0:098463de4c5d 249 int openmode = posix_to_semihost_open_flags(flags);
group-onsemi 0:098463de4c5d 250 if (openmode == OPEN_INVALID) {
group-onsemi 0:098463de4c5d 251 return NULL;
group-onsemi 0:098463de4c5d 252 }
group-onsemi 0:098463de4c5d 253
group-onsemi 0:098463de4c5d 254 FILEHANDLE fh = semihost_open(name, openmode);
group-onsemi 0:098463de4c5d 255 if (fh == -1) {
group-onsemi 0:098463de4c5d 256 return NULL;
group-onsemi 0:098463de4c5d 257 }
group-onsemi 0:098463de4c5d 258 return new LocalFileHandle(fh);
group-onsemi 0:098463de4c5d 259 }
group-onsemi 0:098463de4c5d 260
group-onsemi 0:098463de4c5d 261 int LocalFileSystem::remove(const char *filename) {
group-onsemi 0:098463de4c5d 262 // No global state modified so function is thread safe
group-onsemi 0:098463de4c5d 263
group-onsemi 0:098463de4c5d 264 return semihost_remove(filename);
group-onsemi 0:098463de4c5d 265 }
group-onsemi 0:098463de4c5d 266
group-onsemi 0:098463de4c5d 267 DirHandle *LocalFileSystem::opendir(const char *name) {
group-onsemi 0:098463de4c5d 268 // No global state modified so function is thread safe
group-onsemi 0:098463de4c5d 269
group-onsemi 0:098463de4c5d 270 return new LocalDirHandle();
group-onsemi 0:098463de4c5d 271 }
group-onsemi 0:098463de4c5d 272
group-onsemi 0:098463de4c5d 273 } // namespace mbed
group-onsemi 0:098463de4c5d 274
group-onsemi 0:098463de4c5d 275 #endif