Василий Басалаев / mbed-I2CIO

Modification of mbed-src library only for STM32F030F4, very cheap microcontroller in 20-Pin TSSOP package, with 16Kbytes of Flash and 4Kbytes of Ram. **Target for online compilator must be Nucleo 32F030R8.** 01.02.2018 Acosinwork: Fork of mbed-STM32F030F4 library. Support for Troyka GPIO expander by Amperka. http://amperka.ru/product/troyka-gpio-expander

Fork of mbed-STM32F030F4 by Nothing Special

common/LocalFileSystem.cpp@12:6f07dd7cbe47, 2018-02-01 (annotated)

Committer:
acosinwork
Date:
Thu Feb 01 10:37:10 2018 +0000
Revision:
12:6f07dd7cbe47
Parent:
0:38ccae254a29 
Change pin mapping and set internall oscillator as default. Fork to support Troyka GPIO expander (I2C I/O); http://amperka.ru/product/troyka-gpio-expander

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mega64 0:38ccae254a29 1 /* mbed Microcontroller Library
mega64 0:38ccae254a29 2 * Copyright (c) 2006-2013 ARM Limited
mega64 0:38ccae254a29 3 *
mega64 0:38ccae254a29 4 * Licensed under the Apache License, Version 2.0 (the "License");
mega64 0:38ccae254a29 5 * you may not use this file except in compliance with the License.
mega64 0:38ccae254a29 6 * You may obtain a copy of the License at
mega64 0:38ccae254a29 7 *
mega64 0:38ccae254a29 8 * http://www.apache.org/licenses/LICENSE-2.0
mega64 0:38ccae254a29 9 *
mega64 0:38ccae254a29 10 * Unless required by applicable law or agreed to in writing, software
mega64 0:38ccae254a29 11 * distributed under the License is distributed on an "AS IS" BASIS,
mega64 0:38ccae254a29 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
mega64 0:38ccae254a29 13 * See the License for the specific language governing permissions and
mega64 0:38ccae254a29 14 * limitations under the License.
mega64 0:38ccae254a29 15 */
mega64 0:38ccae254a29 16 #include "LocalFileSystem.h"
mega64 0:38ccae254a29 17
mega64 0:38ccae254a29 18 #if DEVICE_LOCALFILESYSTEM
mega64 0:38ccae254a29 19
mega64 0:38ccae254a29 20 #include "semihost_api.h"
mega64 0:38ccae254a29 21 #include <string.h>
mega64 0:38ccae254a29 22 #include <stdio.h>
mega64 0:38ccae254a29 23
mega64 0:38ccae254a29 24 namespace mbed {
mega64 0:38ccae254a29 25
mega64 0:38ccae254a29 26 /* Extension to FINFO type defined in RTL.h (in Keil RL) - adds 'create time'. */
mega64 0:38ccae254a29 27 typedef struct {
mega64 0:38ccae254a29 28 unsigned char hr; /* Hours [0..23] */
mega64 0:38ccae254a29 29 unsigned char min; /* Minutes [0..59] */
mega64 0:38ccae254a29 30 unsigned char sec; /* Seconds [0..59] */
mega64 0:38ccae254a29 31 unsigned char day; /* Day [1..31] */
mega64 0:38ccae254a29 32 unsigned char mon; /* Month [1..12] */
mega64 0:38ccae254a29 33 unsigned short year; /* Year [1980..2107] */
mega64 0:38ccae254a29 34 } FTIME;
mega64 0:38ccae254a29 35
mega64 0:38ccae254a29 36 typedef struct { /* File Search info record */
mega64 0:38ccae254a29 37 char name[32]; /* File name */
mega64 0:38ccae254a29 38 long size; /* File size in bytes */
mega64 0:38ccae254a29 39 int fileID; /* System File Identification */
mega64 0:38ccae254a29 40 FTIME create_time; /* Date & time file was created */
mega64 0:38ccae254a29 41 FTIME write_time; /* Date & time of last write */
mega64 0:38ccae254a29 42 } XFINFO;
mega64 0:38ccae254a29 43
mega64 0:38ccae254a29 44 #define RESERVED_FOR_USER_APPLICATIONS (0x100) /* 0x100 - 0x1ff */
mega64 0:38ccae254a29 45 #define USR_XFFIND (RESERVED_FOR_USER_APPLICATIONS + 0)
mega64 0:38ccae254a29 46
mega64 0:38ccae254a29 47 static int xffind (const char *pattern, XFINFO *info) {
mega64 0:38ccae254a29 48 unsigned param[4];
mega64 0:38ccae254a29 49
mega64 0:38ccae254a29 50 param[0] = (unsigned long)pattern;
mega64 0:38ccae254a29 51 param[1] = (unsigned long)strlen(pattern);
mega64 0:38ccae254a29 52 param[2] = (unsigned long)info;
mega64 0:38ccae254a29 53 param[3] = (unsigned long)sizeof(XFINFO);
mega64 0:38ccae254a29 54
mega64 0:38ccae254a29 55 return __semihost(USR_XFFIND, param);
mega64 0:38ccae254a29 56 }
mega64 0:38ccae254a29 57
mega64 0:38ccae254a29 58 #define OPEN_R 0
mega64 0:38ccae254a29 59 #define OPEN_B 1
mega64 0:38ccae254a29 60 #define OPEN_PLUS 2
mega64 0:38ccae254a29 61 #define OPEN_W 4
mega64 0:38ccae254a29 62 #define OPEN_A 8
mega64 0:38ccae254a29 63 #define OPEN_INVALID -1
mega64 0:38ccae254a29 64
mega64 0:38ccae254a29 65 int posix_to_semihost_open_flags(int flags) {
mega64 0:38ccae254a29 66 /* POSIX flags -> semihosting open mode */
mega64 0:38ccae254a29 67 int openmode;
mega64 0:38ccae254a29 68 if (flags & O_RDWR) {
mega64 0:38ccae254a29 69 /* a plus mode */
mega64 0:38ccae254a29 70 openmode = OPEN_PLUS;
mega64 0:38ccae254a29 71 if (flags & O_APPEND) {
mega64 0:38ccae254a29 72 openmode |= OPEN_A;
mega64 0:38ccae254a29 73 } else if (flags & O_TRUNC) {
mega64 0:38ccae254a29 74 openmode |= OPEN_W;
mega64 0:38ccae254a29 75 } else {
mega64 0:38ccae254a29 76 openmode |= OPEN_R;
mega64 0:38ccae254a29 77 }
mega64 0:38ccae254a29 78 } else if (flags & O_WRONLY) {
mega64 0:38ccae254a29 79 /* write or append */
mega64 0:38ccae254a29 80 if (flags & O_APPEND) {
mega64 0:38ccae254a29 81 openmode = OPEN_A;
mega64 0:38ccae254a29 82 } else {
mega64 0:38ccae254a29 83 openmode = OPEN_W;
mega64 0:38ccae254a29 84 }
mega64 0:38ccae254a29 85 } else if (flags == O_RDONLY) {
mega64 0:38ccae254a29 86 /* read mode */
mega64 0:38ccae254a29 87 openmode = OPEN_R;
mega64 0:38ccae254a29 88 } else {
mega64 0:38ccae254a29 89 /* invalid flags */
mega64 0:38ccae254a29 90 openmode = OPEN_INVALID;
mega64 0:38ccae254a29 91 }
mega64 0:38ccae254a29 92
mega64 0:38ccae254a29 93 return openmode;
mega64 0:38ccae254a29 94 }
mega64 0:38ccae254a29 95
mega64 0:38ccae254a29 96 FILEHANDLE local_file_open(const char* name, int flags) {
mega64 0:38ccae254a29 97 int openmode = posix_to_semihost_open_flags(flags);
mega64 0:38ccae254a29 98 if (openmode == OPEN_INVALID) {
mega64 0:38ccae254a29 99 return (FILEHANDLE)NULL;
mega64 0:38ccae254a29 100 }
mega64 0:38ccae254a29 101
mega64 0:38ccae254a29 102 FILEHANDLE fh = semihost_open(name, openmode);
mega64 0:38ccae254a29 103 if (fh == -1) {
mega64 0:38ccae254a29 104 return (FILEHANDLE)NULL;
mega64 0:38ccae254a29 105 }
mega64 0:38ccae254a29 106
mega64 0:38ccae254a29 107 return fh;
mega64 0:38ccae254a29 108 }
mega64 0:38ccae254a29 109
mega64 0:38ccae254a29 110 LocalFileHandle::LocalFileHandle(FILEHANDLE fh) : _fh(fh), pos(0) {
mega64 0:38ccae254a29 111 }
mega64 0:38ccae254a29 112
mega64 0:38ccae254a29 113 int LocalFileHandle::close() {
mega64 0:38ccae254a29 114 int retval = semihost_close(_fh);
mega64 0:38ccae254a29 115 delete this;
mega64 0:38ccae254a29 116 return retval;
mega64 0:38ccae254a29 117 }
mega64 0:38ccae254a29 118
mega64 0:38ccae254a29 119 ssize_t LocalFileHandle::write(const void *buffer, size_t length) {
mega64 0:38ccae254a29 120 ssize_t n = semihost_write(_fh, (const unsigned char*)buffer, length, 0); // number of characters not written
mega64 0:38ccae254a29 121 n = length - n; // number of characters written
mega64 0:38ccae254a29 122 pos += n;
mega64 0:38ccae254a29 123 return n;
mega64 0:38ccae254a29 124 }
mega64 0:38ccae254a29 125
mega64 0:38ccae254a29 126 ssize_t LocalFileHandle::read(void *buffer, size_t length) {
mega64 0:38ccae254a29 127 ssize_t n = semihost_read(_fh, (unsigned char*)buffer, length, 0); // number of characters not read
mega64 0:38ccae254a29 128 n = length - n; // number of characters read
mega64 0:38ccae254a29 129 pos += n;
mega64 0:38ccae254a29 130 return n;
mega64 0:38ccae254a29 131 }
mega64 0:38ccae254a29 132
mega64 0:38ccae254a29 133 int LocalFileHandle::isatty() {
mega64 0:38ccae254a29 134 return semihost_istty(_fh);
mega64 0:38ccae254a29 135 }
mega64 0:38ccae254a29 136
mega64 0:38ccae254a29 137 off_t LocalFileHandle::lseek(off_t position, int whence) {
mega64 0:38ccae254a29 138 if (whence == SEEK_CUR) {
mega64 0:38ccae254a29 139 position += pos;
mega64 0:38ccae254a29 140 } else if (whence == SEEK_END) {
mega64 0:38ccae254a29 141 position += semihost_flen(_fh);
mega64 0:38ccae254a29 142 } /* otherwise SEEK_SET, so position is fine */
mega64 0:38ccae254a29 143
mega64 0:38ccae254a29 144 /* Always seems to return -1, so just ignore for now. */
mega64 0:38ccae254a29 145 semihost_seek(_fh, position);
mega64 0:38ccae254a29 146 pos = position;
mega64 0:38ccae254a29 147 return position;
mega64 0:38ccae254a29 148 }
mega64 0:38ccae254a29 149
mega64 0:38ccae254a29 150 int LocalFileHandle::fsync() {
mega64 0:38ccae254a29 151 return semihost_ensure(_fh);
mega64 0:38ccae254a29 152 }
mega64 0:38ccae254a29 153
mega64 0:38ccae254a29 154 off_t LocalFileHandle::flen() {
mega64 0:38ccae254a29 155 return semihost_flen(_fh);
mega64 0:38ccae254a29 156 }
mega64 0:38ccae254a29 157
mega64 0:38ccae254a29 158 class LocalDirHandle : public DirHandle {
mega64 0:38ccae254a29 159
mega64 0:38ccae254a29 160 public:
mega64 0:38ccae254a29 161 struct dirent cur_entry;
mega64 0:38ccae254a29 162 XFINFO info;
mega64 0:38ccae254a29 163
mega64 0:38ccae254a29 164 LocalDirHandle() : cur_entry(), info() {
mega64 0:38ccae254a29 165 }
mega64 0:38ccae254a29 166
mega64 0:38ccae254a29 167 virtual int closedir() {
mega64 0:38ccae254a29 168 delete this;
mega64 0:38ccae254a29 169 return 0;
mega64 0:38ccae254a29 170 }
mega64 0:38ccae254a29 171
mega64 0:38ccae254a29 172 virtual struct dirent *readdir() {
mega64 0:38ccae254a29 173 if (xffind("*", &info)!=0) {
mega64 0:38ccae254a29 174 return NULL;
mega64 0:38ccae254a29 175 }
mega64 0:38ccae254a29 176 memcpy(cur_entry.d_name, info.name, sizeof(info.name));
mega64 0:38ccae254a29 177 return &cur_entry;
mega64 0:38ccae254a29 178 }
mega64 0:38ccae254a29 179
mega64 0:38ccae254a29 180 virtual void rewinddir() {
mega64 0:38ccae254a29 181 info.fileID = 0;
mega64 0:38ccae254a29 182 }
mega64 0:38ccae254a29 183
mega64 0:38ccae254a29 184 virtual off_t telldir() {
mega64 0:38ccae254a29 185 return info.fileID;
mega64 0:38ccae254a29 186 }
mega64 0:38ccae254a29 187
mega64 0:38ccae254a29 188 virtual void seekdir(off_t offset) {
mega64 0:38ccae254a29 189 info.fileID = offset;
mega64 0:38ccae254a29 190 }
mega64 0:38ccae254a29 191 };
mega64 0:38ccae254a29 192
mega64 0:38ccae254a29 193 FileHandle *LocalFileSystem::open(const char* name, int flags) {
mega64 0:38ccae254a29 194 /* reject filenames with / in them */
mega64 0:38ccae254a29 195 for (const char *tmp = name; *tmp; tmp++) {
mega64 0:38ccae254a29 196 if (*tmp == '/') {
mega64 0:38ccae254a29 197 return NULL;
mega64 0:38ccae254a29 198 }
mega64 0:38ccae254a29 199 }
mega64 0:38ccae254a29 200
mega64 0:38ccae254a29 201 int openmode = posix_to_semihost_open_flags(flags);
mega64 0:38ccae254a29 202 if (openmode == OPEN_INVALID) {
mega64 0:38ccae254a29 203 return NULL;
mega64 0:38ccae254a29 204 }
mega64 0:38ccae254a29 205
mega64 0:38ccae254a29 206 FILEHANDLE fh = semihost_open(name, openmode);
mega64 0:38ccae254a29 207 if (fh == -1) {
mega64 0:38ccae254a29 208 return NULL;
mega64 0:38ccae254a29 209 }
mega64 0:38ccae254a29 210 return new LocalFileHandle(fh);
mega64 0:38ccae254a29 211 }
mega64 0:38ccae254a29 212
mega64 0:38ccae254a29 213 int LocalFileSystem::remove(const char *filename) {
mega64 0:38ccae254a29 214 return semihost_remove(filename);
mega64 0:38ccae254a29 215 }
mega64 0:38ccae254a29 216
mega64 0:38ccae254a29 217 DirHandle *LocalFileSystem::opendir(const char *name) {
mega64 0:38ccae254a29 218 return new LocalDirHandle();
mega64 0:38ccae254a29 219 }
mega64 0:38ccae254a29 220
mega64 0:38ccae254a29 221 } // namespace mbed
mega64 0:38ccae254a29 222
mega64 0:38ccae254a29 223 #endif