Nuvoton / Mbed OS NuMaker-mbed-SD-FileSystem-example

NuMaker SD-File-System with SD mode

main.cpp@23:036c20fd7064, 2020-05-14 (annotated)

Committer:
ccli8
Date:
Thu May 14 17:58:54 2020 +0800
Revision:
23:036c20fd7064
Parent:
21:dfd65207a645
Child:
25:1d348ccfc209
Change default file system type to FAT from Little



This is not to destroy user's SD card usually in FAT. In addition, user can inspect its content easily on Windows.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ccli8 21:dfd65207a645 1 /* mbed Microcontroller Library
ccli8 21:dfd65207a645 2 * Copyright (c) 2006-2019 ARM Limited
ccli8 21:dfd65207a645 3 *
ccli8 21:dfd65207a645 4 * Licensed under the Apache License, Version 2.0 (the "License");
ccli8 21:dfd65207a645 5 * you may not use this file except in compliance with the License.
ccli8 21:dfd65207a645 6 * You may obtain a copy of the License at
ccli8 21:dfd65207a645 7 *
ccli8 21:dfd65207a645 8 * http://www.apache.org/licenses/LICENSE-2.0
ccli8 21:dfd65207a645 9 *
ccli8 21:dfd65207a645 10 * Unless required by applicable law or agreed to in writing, software
ccli8 21:dfd65207a645 11 * distributed under the License is distributed on an "AS IS" BASIS,
ccli8 21:dfd65207a645 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
ccli8 21:dfd65207a645 13 * See the License for the specific language governing permissions and
ccli8 21:dfd65207a645 14 * limitations under the License.
ccli8 21:dfd65207a645 15 */
ccli8 21:dfd65207a645 16 #include "mbed.h"
ccli8 21:dfd65207a645 17 #include <stdio.h>
ccli8 21:dfd65207a645 18 #include <errno.h>
ccli8 21:dfd65207a645 19
ccli8 21:dfd65207a645 20 #include "NuSDBlockDevice.h"
ccli8 21:dfd65207a645 21
ccli8 21:dfd65207a645 22 // Maximum number of elements in buffer
ccli8 21:dfd65207a645 23 #define BUFFER_MAX_LEN 10
ccli8 21:dfd65207a645 24
ccli8 21:dfd65207a645 25 // NUSD for block device
ccli8 21:dfd65207a645 26 NuSDBlockDevice *bd = new NuSDBlockDevice();
ccli8 21:dfd65207a645 27
ccli8 21:dfd65207a645 28 // Instead of the default block device, you can define your own block device.
ccli8 21:dfd65207a645 29 // For example: HeapBlockDevice with size of 2048 bytes, read size 1, write size 1 and erase size 512.
ccli8 21:dfd65207a645 30 // #include "HeapBlockDevice.h"
ccli8 21:dfd65207a645 31 // BlockDevice *bd = new HeapBlockDevice(2048, 1, 1, 512);
ccli8 21:dfd65207a645 32
ccli8 21:dfd65207a645 33
ccli8 23:036c20fd7064 34 // This example uses FAT file system as the default.
ccli8 23:036c20fd7064 35 #include "FATFileSystem.h"
ccli8 23:036c20fd7064 36 FATFileSystem fs("fs");
ccli8 21:dfd65207a645 37
ccli8 23:036c20fd7064 38 // Uncomment in the following two lines and comment out the previous two to use Little file system.
ccli8 23:036c20fd7064 39 //#include "LittleFileSystem.h"
ccli8 23:036c20fd7064 40 //LittleFileSystem fs("fs");
ccli8 21:dfd65207a645 41
ccli8 21:dfd65207a645 42
ccli8 21:dfd65207a645 43 // Set up the button to trigger an erase
ccli8 21:dfd65207a645 44 InterruptIn irq(BUTTON1);
ccli8 21:dfd65207a645 45 void erase() {
ccli8 21:dfd65207a645 46 printf("Initializing the block device... ");
ccli8 21:dfd65207a645 47 fflush(stdout);
ccli8 21:dfd65207a645 48 int err = bd->init();
ccli8 21:dfd65207a645 49 printf("%s\n", (err ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 50 if (err) {
ccli8 21:dfd65207a645 51 error("error: %s (%d)\n", strerror(-err), err);
ccli8 21:dfd65207a645 52 }
ccli8 21:dfd65207a645 53
ccli8 21:dfd65207a645 54 printf("Erasing the block device... ");
ccli8 21:dfd65207a645 55 fflush(stdout);
ccli8 21:dfd65207a645 56 err = bd->erase(0, bd->size());
ccli8 21:dfd65207a645 57 printf("%s\n", (err ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 58 if (err) {
ccli8 21:dfd65207a645 59 error("error: %s (%d)\n", strerror(-err), err);
ccli8 21:dfd65207a645 60 }
ccli8 21:dfd65207a645 61
ccli8 21:dfd65207a645 62 printf("Deinitializing the block device... ");
ccli8 21:dfd65207a645 63 fflush(stdout);
ccli8 21:dfd65207a645 64 err = bd->deinit();
ccli8 21:dfd65207a645 65 printf("%s\n", (err ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 66 if (err) {
ccli8 21:dfd65207a645 67 error("error: %s (%d)\n", strerror(-err), err);
ccli8 21:dfd65207a645 68 }
ccli8 21:dfd65207a645 69 }
ccli8 21:dfd65207a645 70
ccli8 21:dfd65207a645 71
ccli8 21:dfd65207a645 72 // Entry point for the example
ccli8 21:dfd65207a645 73 int main() {
ccli8 21:dfd65207a645 74 printf("--- Mbed OS filesystem example ---\n");
ccli8 21:dfd65207a645 75
ccli8 21:dfd65207a645 76 // Setup the erase event on button press, use the event queue
ccli8 21:dfd65207a645 77 // to avoid running in interrupt context
ccli8 21:dfd65207a645 78 irq.fall(mbed_event_queue()->event(erase));
ccli8 21:dfd65207a645 79
ccli8 21:dfd65207a645 80 // Try to mount the filesystem
ccli8 21:dfd65207a645 81 printf("Mounting the filesystem... ");
ccli8 21:dfd65207a645 82 fflush(stdout);
ccli8 21:dfd65207a645 83 int err = fs.mount(bd);
ccli8 21:dfd65207a645 84 printf("%s\n", (err ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 85 if (err) {
ccli8 21:dfd65207a645 86 // Reformat if we can't mount the filesystem
ccli8 21:dfd65207a645 87 // this should only happen on the first boot
ccli8 21:dfd65207a645 88 printf("No filesystem found, formatting... ");
ccli8 21:dfd65207a645 89 fflush(stdout);
ccli8 21:dfd65207a645 90 err = fs.reformat(bd);
ccli8 21:dfd65207a645 91 printf("%s\n", (err ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 92 if (err) {
ccli8 21:dfd65207a645 93 error("error: %s (%d)\n", strerror(-err), err);
ccli8 21:dfd65207a645 94 }
ccli8 21:dfd65207a645 95 }
ccli8 21:dfd65207a645 96
ccli8 21:dfd65207a645 97 // Open the numbers file
ccli8 21:dfd65207a645 98 printf("Opening \"/fs/numbers.txt\"... ");
ccli8 21:dfd65207a645 99 fflush(stdout);
ccli8 21:dfd65207a645 100 FILE *f = fopen("/fs/numbers.txt", "r+");
ccli8 21:dfd65207a645 101 printf("%s\n", (!f ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 102 if (!f) {
ccli8 21:dfd65207a645 103 // Create the numbers file if it doesn't exist
ccli8 21:dfd65207a645 104 printf("No file found, creating a new file... ");
ccli8 21:dfd65207a645 105 fflush(stdout);
ccli8 21:dfd65207a645 106 f = fopen("/fs/numbers.txt", "w+");
ccli8 21:dfd65207a645 107 printf("%s\n", (!f ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 108 if (!f) {
ccli8 21:dfd65207a645 109 error("error: %s (%d)\n", strerror(errno), -errno);
ccli8 21:dfd65207a645 110 }
ccli8 21:dfd65207a645 111
ccli8 21:dfd65207a645 112 for (int i = 0; i < 10; i++) {
ccli8 21:dfd65207a645 113 printf("\rWriting numbers (%d/%d)... ", i, 10);
ccli8 21:dfd65207a645 114 fflush(stdout);
ccli8 21:dfd65207a645 115 err = fprintf(f, " %d\n", i);
ccli8 21:dfd65207a645 116 if (err < 0) {
ccli8 21:dfd65207a645 117 printf("Fail :(\n");
ccli8 21:dfd65207a645 118 error("error: %s (%d)\n", strerror(errno), -errno);
ccli8 21:dfd65207a645 119 }
ccli8 21:dfd65207a645 120 }
ccli8 21:dfd65207a645 121 printf("\rWriting numbers (%d/%d)... OK\n", 10, 10);
ccli8 21:dfd65207a645 122
ccli8 21:dfd65207a645 123 printf("Seeking file... ");
ccli8 21:dfd65207a645 124 fflush(stdout);
ccli8 21:dfd65207a645 125 err = fseek(f, 0, SEEK_SET);
ccli8 21:dfd65207a645 126 printf("%s\n", (err < 0 ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 127 if (err < 0) {
ccli8 21:dfd65207a645 128 error("error: %s (%d)\n", strerror(errno), -errno);
ccli8 21:dfd65207a645 129 }
ccli8 21:dfd65207a645 130 }
ccli8 21:dfd65207a645 131
ccli8 21:dfd65207a645 132 // Go through and increment the numbers
ccli8 21:dfd65207a645 133 for (int i = 0; i < 10; i++) {
ccli8 21:dfd65207a645 134 printf("\rIncrementing numbers (%d/%d)... ", i, 10);
ccli8 21:dfd65207a645 135 fflush(stdout);
ccli8 21:dfd65207a645 136
ccli8 21:dfd65207a645 137 // Get current stream position
ccli8 21:dfd65207a645 138 long pos = ftell(f);
ccli8 21:dfd65207a645 139
ccli8 21:dfd65207a645 140 // Parse out the number and increment
ccli8 21:dfd65207a645 141 char buf[BUFFER_MAX_LEN];
ccli8 21:dfd65207a645 142 if (!fgets(buf, BUFFER_MAX_LEN, f)) {
ccli8 21:dfd65207a645 143 error("error: %s (%d)\n", strerror(errno), -errno);
ccli8 21:dfd65207a645 144 }
ccli8 21:dfd65207a645 145 char *endptr;
ccli8 21:dfd65207a645 146 int32_t number = strtol(buf, &endptr, 10);
ccli8 21:dfd65207a645 147 if (
ccli8 21:dfd65207a645 148 (errno == ERANGE) || // The number is too small/large
ccli8 21:dfd65207a645 149 (endptr == buf) || // No character was read
ccli8 21:dfd65207a645 150 (*endptr && *endptr != '\n') // The whole input was not converted
ccli8 21:dfd65207a645 151 ) {
ccli8 21:dfd65207a645 152 continue;
ccli8 21:dfd65207a645 153 }
ccli8 21:dfd65207a645 154 number += 1;
ccli8 21:dfd65207a645 155
ccli8 21:dfd65207a645 156 // Seek to beginning of number
ccli8 21:dfd65207a645 157 fseek(f, pos, SEEK_SET);
ccli8 21:dfd65207a645 158
ccli8 21:dfd65207a645 159 // Store number
ccli8 21:dfd65207a645 160 fprintf(f, " %d\n", number);
ccli8 21:dfd65207a645 161
ccli8 21:dfd65207a645 162 // Flush between write and read on same file
ccli8 21:dfd65207a645 163 fflush(f);
ccli8 21:dfd65207a645 164 }
ccli8 21:dfd65207a645 165 printf("\rIncrementing numbers (%d/%d)... OK\n", 10, 10);
ccli8 21:dfd65207a645 166
ccli8 21:dfd65207a645 167 // Close the file which also flushes any cached writes
ccli8 21:dfd65207a645 168 printf("Closing \"/fs/numbers.txt\"... ");
ccli8 21:dfd65207a645 169 fflush(stdout);
ccli8 21:dfd65207a645 170 err = fclose(f);
ccli8 21:dfd65207a645 171 printf("%s\n", (err < 0 ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 172 if (err < 0) {
ccli8 21:dfd65207a645 173 error("error: %s (%d)\n", strerror(errno), -errno);
ccli8 21:dfd65207a645 174 }
ccli8 21:dfd65207a645 175
ccli8 21:dfd65207a645 176 // Display the root directory
ccli8 21:dfd65207a645 177 printf("Opening the root directory... ");
ccli8 21:dfd65207a645 178 fflush(stdout);
ccli8 21:dfd65207a645 179 DIR *d = opendir("/fs/");
ccli8 21:dfd65207a645 180 printf("%s\n", (!d ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 181 if (!d) {
ccli8 21:dfd65207a645 182 error("error: %s (%d)\n", strerror(errno), -errno);
ccli8 21:dfd65207a645 183 }
ccli8 21:dfd65207a645 184
ccli8 21:dfd65207a645 185 printf("root directory:\n");
ccli8 21:dfd65207a645 186 while (true) {
ccli8 21:dfd65207a645 187 struct dirent *e = readdir(d);
ccli8 21:dfd65207a645 188 if (!e) {
ccli8 21:dfd65207a645 189 break;
ccli8 21:dfd65207a645 190 }
ccli8 21:dfd65207a645 191
ccli8 21:dfd65207a645 192 printf(" %s\n", e->d_name);
ccli8 21:dfd65207a645 193 }
ccli8 21:dfd65207a645 194
ccli8 21:dfd65207a645 195 printf("Closing the root directory... ");
ccli8 21:dfd65207a645 196 fflush(stdout);
ccli8 21:dfd65207a645 197 err = closedir(d);
ccli8 21:dfd65207a645 198 printf("%s\n", (err < 0 ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 199 if (err < 0) {
ccli8 21:dfd65207a645 200 error("error: %s (%d)\n", strerror(errno), -errno);
ccli8 21:dfd65207a645 201 }
ccli8 21:dfd65207a645 202
ccli8 21:dfd65207a645 203 // Display the numbers file
ccli8 21:dfd65207a645 204 printf("Opening \"/fs/numbers.txt\"... ");
ccli8 21:dfd65207a645 205 fflush(stdout);
ccli8 21:dfd65207a645 206 f = fopen("/fs/numbers.txt", "r");
ccli8 21:dfd65207a645 207 printf("%s\n", (!f ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 208 if (!f) {
ccli8 21:dfd65207a645 209 error("error: %s (%d)\n", strerror(errno), -errno);
ccli8 21:dfd65207a645 210 }
ccli8 21:dfd65207a645 211
ccli8 21:dfd65207a645 212 printf("numbers:\n");
ccli8 21:dfd65207a645 213 while (!feof(f)) {
ccli8 21:dfd65207a645 214 int c = fgetc(f);
ccli8 21:dfd65207a645 215 printf("%c", c);
ccli8 21:dfd65207a645 216 }
ccli8 21:dfd65207a645 217
ccli8 21:dfd65207a645 218 printf("\rClosing \"/fs/numbers.txt\"... ");
ccli8 21:dfd65207a645 219 fflush(stdout);
ccli8 21:dfd65207a645 220 err = fclose(f);
ccli8 21:dfd65207a645 221 printf("%s\n", (err < 0 ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 222 if (err < 0) {
ccli8 21:dfd65207a645 223 error("error: %s (%d)\n", strerror(errno), -errno);
ccli8 21:dfd65207a645 224 }
ccli8 21:dfd65207a645 225
ccli8 21:dfd65207a645 226 // Tidy up
ccli8 21:dfd65207a645 227 printf("Unmounting... ");
ccli8 21:dfd65207a645 228 fflush(stdout);
ccli8 21:dfd65207a645 229 err = fs.unmount();
ccli8 21:dfd65207a645 230 printf("%s\n", (err < 0 ? "Fail :(" : "OK"));
ccli8 21:dfd65207a645 231 if (err < 0) {
ccli8 21:dfd65207a645 232 error("error: %s (%d)\n", strerror(-err), err);
ccli8 21:dfd65207a645 233 }
ccli8 21:dfd65207a645 234
ccli8 21:dfd65207a645 235 printf("Mbed OS filesystem example done!\n");
ccli8 21:dfd65207a645 236 }
ccli8 21:dfd65207a645 237