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Dependencies:   IOTAtelier1819-FileSystem BSP_B-L475E-IOT01

main.cpp@26:130bb1173866, 2018-11-23 (annotated)

Committer:
lmottola
Date:
Fri Nov 23 09:15:36 2018 +0000
Revision:
26:130bb1173866
Parent:
25:65a9183a2178
Child:
27:6961ff206736
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
lmottola 26:130bb1173866 1
mbed_official 0:8e251d9511b8 2 #include "mbed.h"
mbed_official 0:8e251d9511b8 3 #include <stdio.h>
mbed_official 0:8e251d9511b8 4 #include <errno.h>
mbed_official 0:8e251d9511b8 5
mbed_official 0:8e251d9511b8 6 // Block devices
mbed_official 25:65a9183a2178 7 #if COMPONENT_SPIF
mbed_official 0:8e251d9511b8 8 #include "SPIFBlockDevice.h"
mbed_official 25:65a9183a2178 9 #endif
mbed_official 25:65a9183a2178 10
mbed_official 25:65a9183a2178 11 #if COMPONENT_DATAFLASH
mbed_official 1:2bfc377bcc2a 12 #include "DataFlashBlockDevice.h"
mbed_official 25:65a9183a2178 13 #endif
mbed_official 25:65a9183a2178 14
mbed_official 25:65a9183a2178 15 #if COMPONENT_SD
mbed_official 0:8e251d9511b8 16 #include "SDBlockDevice.h"
mbed_official 25:65a9183a2178 17 #endif
mbed_official 25:65a9183a2178 18
mbed_official 0:8e251d9511b8 19 #include "HeapBlockDevice.h"
mbed_official 0:8e251d9511b8 20
mbed_official 0:8e251d9511b8 21 // File systems
mbed_official 0:8e251d9511b8 22 #include "LittleFileSystem.h"
mbed_official 0:8e251d9511b8 23 #include "FATFileSystem.h"
mbed_official 0:8e251d9511b8 24
mbed_official 0:8e251d9511b8 25 // Physical block device, can be any device that supports the BlockDevice API
lmottola 26:130bb1173866 26 /*SPIFBlockDevice bd(
mbed_official 0:8e251d9511b8 27 MBED_CONF_SPIF_DRIVER_SPI_MOSI,
mbed_official 0:8e251d9511b8 28 MBED_CONF_SPIF_DRIVER_SPI_MISO,
mbed_official 0:8e251d9511b8 29 MBED_CONF_SPIF_DRIVER_SPI_CLK,
lmottola 26:130bb1173866 30 MBED_CONF_SPIF_DRIVER_SPI_CS);*/
lmottola 26:130bb1173866 31
lmottola 26:130bb1173866 32 #define BLOCK_SIZE 512
lmottola 26:130bb1173866 33 HeapBlockDevice bd(2048, BLOCK_SIZE);
mbed_official 0:8e251d9511b8 34
mbed_official 0:8e251d9511b8 35 // File system declaration
mbed_official 0:8e251d9511b8 36 LittleFileSystem fs("fs");
mbed_official 0:8e251d9511b8 37
mbed_official 0:8e251d9511b8 38 // Set up the button to trigger an erase
mbed_official 0:8e251d9511b8 39 InterruptIn irq(BUTTON1);
mbed_official 0:8e251d9511b8 40 void erase() {
mbed_official 0:8e251d9511b8 41 printf("Initializing the block device... ");
mbed_official 0:8e251d9511b8 42 fflush(stdout);
mbed_official 0:8e251d9511b8 43 int err = bd.init();
mbed_official 0:8e251d9511b8 44 printf("%s\n", (err ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 45 if (err) {
mbed_official 0:8e251d9511b8 46 error("error: %s (%d)\n", strerror(-err), err);
mbed_official 0:8e251d9511b8 47 }
mbed_official 0:8e251d9511b8 48
mbed_official 0:8e251d9511b8 49 printf("Erasing the block device... ");
mbed_official 0:8e251d9511b8 50 fflush(stdout);
mbed_official 0:8e251d9511b8 51 err = bd.erase(0, bd.size());
mbed_official 0:8e251d9511b8 52 printf("%s\n", (err ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 53 if (err) {
mbed_official 0:8e251d9511b8 54 error("error: %s (%d)\n", strerror(-err), err);
mbed_official 0:8e251d9511b8 55 }
mbed_official 0:8e251d9511b8 56
mbed_official 0:8e251d9511b8 57 printf("Deinitializing the block device... ");
mbed_official 0:8e251d9511b8 58 fflush(stdout);
mbed_official 0:8e251d9511b8 59 err = bd.deinit();
mbed_official 0:8e251d9511b8 60 printf("%s\n", (err ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 61 if (err) {
mbed_official 0:8e251d9511b8 62 error("error: %s (%d)\n", strerror(-err), err);
mbed_official 0:8e251d9511b8 63 }
mbed_official 0:8e251d9511b8 64 }
mbed_official 0:8e251d9511b8 65
mbed_official 0:8e251d9511b8 66
mbed_official 0:8e251d9511b8 67 // Entry point for the example
mbed_official 0:8e251d9511b8 68 int main() {
mbed_official 0:8e251d9511b8 69 printf("--- Mbed OS filesystem example ---\n");
mbed_official 0:8e251d9511b8 70
mbed_official 12:a07d0af60cc6 71 // Setup the erase event on button press, use the event queue
mbed_official 12:a07d0af60cc6 72 // to avoid running in interrupt context
mbed_official 12:a07d0af60cc6 73 irq.fall(mbed_event_queue()->event(erase));
mbed_official 0:8e251d9511b8 74
mbed_official 0:8e251d9511b8 75 // Try to mount the filesystem
mbed_official 0:8e251d9511b8 76 printf("Mounting the filesystem... ");
mbed_official 0:8e251d9511b8 77 fflush(stdout);
mbed_official 0:8e251d9511b8 78 int err = fs.mount(&bd);
mbed_official 0:8e251d9511b8 79 printf("%s\n", (err ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 80 if (err) {
mbed_official 0:8e251d9511b8 81 // Reformat if we can't mount the filesystem
mbed_official 0:8e251d9511b8 82 // this should only happen on the first boot
mbed_official 0:8e251d9511b8 83 printf("No filesystem found, formatting... ");
mbed_official 0:8e251d9511b8 84 fflush(stdout);
mbed_official 0:8e251d9511b8 85 err = fs.reformat(&bd);
mbed_official 0:8e251d9511b8 86 printf("%s\n", (err ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 87 if (err) {
mbed_official 0:8e251d9511b8 88 error("error: %s (%d)\n", strerror(-err), err);
mbed_official 0:8e251d9511b8 89 }
mbed_official 0:8e251d9511b8 90 }
mbed_official 0:8e251d9511b8 91
mbed_official 0:8e251d9511b8 92 // Open the numbers file
mbed_official 0:8e251d9511b8 93 printf("Opening \"/fs/numbers.txt\"... ");
mbed_official 0:8e251d9511b8 94 fflush(stdout);
mbed_official 0:8e251d9511b8 95 FILE *f = fopen("/fs/numbers.txt", "r+");
mbed_official 0:8e251d9511b8 96 printf("%s\n", (!f ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 97 if (!f) {
mbed_official 0:8e251d9511b8 98 // Create the numbers file if it doesn't exist
mbed_official 0:8e251d9511b8 99 printf("No file found, creating a new file... ");
mbed_official 0:8e251d9511b8 100 fflush(stdout);
mbed_official 0:8e251d9511b8 101 f = fopen("/fs/numbers.txt", "w+");
mbed_official 0:8e251d9511b8 102 printf("%s\n", (!f ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 103 if (!f) {
mbed_official 0:8e251d9511b8 104 error("error: %s (%d)\n", strerror(errno), -errno);
mbed_official 0:8e251d9511b8 105 }
mbed_official 0:8e251d9511b8 106
mbed_official 0:8e251d9511b8 107 for (int i = 0; i < 10; i++) {
mbed_official 0:8e251d9511b8 108 printf("\rWriting numbers (%d/%d)... ", i, 10);
mbed_official 0:8e251d9511b8 109 fflush(stdout);
mbed_official 0:8e251d9511b8 110 err = fprintf(f, " %d\n", i);
mbed_official 0:8e251d9511b8 111 if (err < 0) {
mbed_official 0:8e251d9511b8 112 printf("Fail :(\n");
mbed_official 0:8e251d9511b8 113 error("error: %s (%d)\n", strerror(errno), -errno);
mbed_official 0:8e251d9511b8 114 }
mbed_official 0:8e251d9511b8 115 }
mbed_official 0:8e251d9511b8 116 printf("\rWriting numbers (%d/%d)... OK\n", 10, 10);
mbed_official 0:8e251d9511b8 117
mbed_official 0:8e251d9511b8 118 printf("Seeking file... ");
mbed_official 0:8e251d9511b8 119 fflush(stdout);
mbed_official 0:8e251d9511b8 120 err = fseek(f, 0, SEEK_SET);
mbed_official 0:8e251d9511b8 121 printf("%s\n", (err < 0 ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 122 if (err < 0) {
mbed_official 0:8e251d9511b8 123 error("error: %s (%d)\n", strerror(errno), -errno);
mbed_official 0:8e251d9511b8 124 }
mbed_official 0:8e251d9511b8 125 }
mbed_official 0:8e251d9511b8 126
mbed_official 0:8e251d9511b8 127 // Go through and increment the numbers
mbed_official 0:8e251d9511b8 128 for (int i = 0; i < 10; i++) {
mbed_official 0:8e251d9511b8 129 printf("\rIncrementing numbers (%d/%d)... ", i, 10);
mbed_official 0:8e251d9511b8 130 fflush(stdout);
mbed_official 0:8e251d9511b8 131
mbed_official 0:8e251d9511b8 132 // Get current stream position
mbed_official 0:8e251d9511b8 133 long pos = ftell(f);
mbed_official 0:8e251d9511b8 134
mbed_official 0:8e251d9511b8 135 // Parse out the number and increment
mbed_official 0:8e251d9511b8 136 int32_t number;
mbed_official 0:8e251d9511b8 137 fscanf(f, "%d", &number);
mbed_official 0:8e251d9511b8 138 number += 1;
mbed_official 0:8e251d9511b8 139
mbed_official 0:8e251d9511b8 140 // Seek to beginning of number
mbed_official 0:8e251d9511b8 141 fseek(f, pos, SEEK_SET);
mbed_official 0:8e251d9511b8 142
mbed_official 0:8e251d9511b8 143 // Store number
mbed_official 0:8e251d9511b8 144 fprintf(f, " %d\n", number);
mbed_official 10:38d6b74b0eb7 145
mbed_official 10:38d6b74b0eb7 146 // Flush between write and read on same file
mbed_official 10:38d6b74b0eb7 147 fflush(f);
mbed_official 0:8e251d9511b8 148 }
mbed_official 0:8e251d9511b8 149 printf("\rIncrementing numbers (%d/%d)... OK\n", 10, 10);
mbed_official 0:8e251d9511b8 150
mbed_official 0:8e251d9511b8 151 // Close the file which also flushes any cached writes
mbed_official 0:8e251d9511b8 152 printf("Closing \"/fs/numbers.txt\"... ");
mbed_official 0:8e251d9511b8 153 fflush(stdout);
mbed_official 0:8e251d9511b8 154 err = fclose(f);
mbed_official 0:8e251d9511b8 155 printf("%s\n", (err < 0 ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 156 if (err < 0) {
mbed_official 0:8e251d9511b8 157 error("error: %s (%d)\n", strerror(errno), -errno);
mbed_official 0:8e251d9511b8 158 }
mbed_official 0:8e251d9511b8 159
mbed_official 0:8e251d9511b8 160 // Display the root directory
mbed_official 0:8e251d9511b8 161 printf("Opening the root directory... ");
mbed_official 0:8e251d9511b8 162 fflush(stdout);
mbed_official 0:8e251d9511b8 163 DIR *d = opendir("/fs/");
mbed_official 0:8e251d9511b8 164 printf("%s\n", (!d ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 165 if (!d) {
mbed_official 0:8e251d9511b8 166 error("error: %s (%d)\n", strerror(errno), -errno);
mbed_official 0:8e251d9511b8 167 }
mbed_official 0:8e251d9511b8 168
mbed_official 0:8e251d9511b8 169 printf("root directory:\n");
mbed_official 0:8e251d9511b8 170 while (true) {
mbed_official 0:8e251d9511b8 171 struct dirent *e = readdir(d);
mbed_official 0:8e251d9511b8 172 if (!e) {
mbed_official 0:8e251d9511b8 173 break;
mbed_official 0:8e251d9511b8 174 }
mbed_official 0:8e251d9511b8 175
mbed_official 0:8e251d9511b8 176 printf(" %s\n", e->d_name);
mbed_official 0:8e251d9511b8 177 }
mbed_official 0:8e251d9511b8 178
mbed_official 0:8e251d9511b8 179 printf("Closing the root directory... ");
mbed_official 0:8e251d9511b8 180 fflush(stdout);
mbed_official 0:8e251d9511b8 181 err = closedir(d);
mbed_official 0:8e251d9511b8 182 printf("%s\n", (err < 0 ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 183 if (err < 0) {
mbed_official 0:8e251d9511b8 184 error("error: %s (%d)\n", strerror(errno), -errno);
mbed_official 0:8e251d9511b8 185 }
mbed_official 0:8e251d9511b8 186
mbed_official 0:8e251d9511b8 187 // Display the numbers file
mbed_official 0:8e251d9511b8 188 printf("Opening \"/fs/numbers.txt\"... ");
mbed_official 0:8e251d9511b8 189 fflush(stdout);
mbed_official 0:8e251d9511b8 190 f = fopen("/fs/numbers.txt", "r");
mbed_official 0:8e251d9511b8 191 printf("%s\n", (!f ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 192 if (!f) {
mbed_official 0:8e251d9511b8 193 error("error: %s (%d)\n", strerror(errno), -errno);
mbed_official 0:8e251d9511b8 194 }
mbed_official 0:8e251d9511b8 195
mbed_official 0:8e251d9511b8 196 printf("numbers:\n");
mbed_official 0:8e251d9511b8 197 while (!feof(f)) {
mbed_official 0:8e251d9511b8 198 int c = fgetc(f);
mbed_official 0:8e251d9511b8 199 printf("%c", c);
mbed_official 0:8e251d9511b8 200 }
mbed_official 0:8e251d9511b8 201
mbed_official 0:8e251d9511b8 202 printf("\rClosing \"/fs/numbers.txt\"... ");
mbed_official 0:8e251d9511b8 203 fflush(stdout);
mbed_official 0:8e251d9511b8 204 err = fclose(f);
mbed_official 0:8e251d9511b8 205 printf("%s\n", (err < 0 ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 206 if (err < 0) {
mbed_official 0:8e251d9511b8 207 error("error: %s (%d)\n", strerror(errno), -errno);
mbed_official 0:8e251d9511b8 208 }
mbed_official 0:8e251d9511b8 209
mbed_official 0:8e251d9511b8 210 // Tidy up
mbed_official 0:8e251d9511b8 211 printf("Unmounting... ");
mbed_official 0:8e251d9511b8 212 fflush(stdout);
mbed_official 0:8e251d9511b8 213 err = fs.unmount();
mbed_official 0:8e251d9511b8 214 printf("%s\n", (err < 0 ? "Fail :(" : "OK"));
mbed_official 0:8e251d9511b8 215 if (err < 0) {
mbed_official 0:8e251d9511b8 216 error("error: %s (%d)\n", strerror(-err), err);
mbed_official 0:8e251d9511b8 217 }
mbed_official 0:8e251d9511b8 218
mbed_official 0:8e251d9511b8 219 printf("Mbed OS filesystem example done!\n");
mbed_official 0:8e251d9511b8 220 }
mbed_official 0:8e251d9511b8 221