Kenji Arai / Mbed OS DISCO-F769NI_BD_SD_Card_Control

microSD Card control function for DISCO-F769NI based on BD_SD_DISCO_F746NG library by Roy Krikke

Dependencies:   BD_SD_DISCO_F769NI BSP_DISCO_F769NI

Fork of DISCO-F746NG_BLOCK_DEVICE_WITH_FAT_FILESYSTEM_ON_SDCARD by Roy Krikke

Please refer following my Notebook page.
/users/kenjiArai/notebook/sd-card-control-new/#

main.cpp@2:993735af824b, 2018-03-24 (annotated)

Committer:
roykrikke
Date:
Sat Mar 24 19:27:59 2018 +0000
Revision:
2:993735af824b
Parent:
1:ffacc9d0b308
Child:
3:7f991a3d4e71
First release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
roykrikke 1:ffacc9d0b308 1 /* Example file of using SD/MMC Block device Library for MBED-OS
roykrikke 1:ffacc9d0b308 2 * Copyright 2017 Roy Krikke
roykrikke 1:ffacc9d0b308 3 *
roykrikke 1:ffacc9d0b308 4 * Licensed under the Apache License, Version 2.0 (the "License");
roykrikke 1:ffacc9d0b308 5 * you may not use this file except in compliance with the License.
roykrikke 1:ffacc9d0b308 6 * You may obtain a copy of the License at
roykrikke 1:ffacc9d0b308 7 *
roykrikke 1:ffacc9d0b308 8 * http://www.apache.org/licenses/LICENSE-2.0
roykrikke 1:ffacc9d0b308 9 *
roykrikke 1:ffacc9d0b308 10 * Unless required by applicable law or agreed to in writing, software
roykrikke 1:ffacc9d0b308 11 * distributed under the License is distributed on an "AS IS" BASIS,
roykrikke 1:ffacc9d0b308 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
roykrikke 1:ffacc9d0b308 13 * See the License for the specific language governing permissions and
roykrikke 1:ffacc9d0b308 14 * limitations under the License.
roykrikke 1:ffacc9d0b308 15 *
roykrikke 1:ffacc9d0b308 16 */
roykrikke 1:ffacc9d0b308 17
roykrikke 0:4cdf28a602a8 18 #include "mbed.h"
roykrikke 2:993735af824b 19 #include "FATFileSystem.h"
roykrikke 0:4cdf28a602a8 20 #include "BD_SD_DISCO_F746NG.h"
roykrikke 2:993735af824b 21 #include <stdio.h>
roykrikke 2:993735af824b 22 #include <errno.h>
roykrikke 0:4cdf28a602a8 23
roykrikke 0:4cdf28a602a8 24 DigitalOut led (LED1);
roykrikke 0:4cdf28a602a8 25
roykrikke 0:4cdf28a602a8 26 // Instantiate the Block Device for sd card on DISCO-F746NG
roykrikke 0:4cdf28a602a8 27 BD_SD_DISCO_F746NG bd;
roykrikke 2:993735af824b 28 FATFileSystem fs ("fs");
roykrikke 2:993735af824b 29
roykrikke 2:993735af824b 30 void
roykrikke 2:993735af824b 31 return_error (int ret_val) {
roykrikke 2:993735af824b 32 if (ret_val)
roykrikke 2:993735af824b 33 printf ("Failure. %d\r\n", ret_val);
roykrikke 2:993735af824b 34 else
roykrikke 2:993735af824b 35 printf ("done.\r\n");
roykrikke 2:993735af824b 36 }
roykrikke 2:993735af824b 37
roykrikke 2:993735af824b 38 void
roykrikke 2:993735af824b 39 errno_error (void* ret_val) {
roykrikke 2:993735af824b 40 if (ret_val == NULL)
roykrikke 2:993735af824b 41 printf (" Failure. %d \r\n", errno);
roykrikke 2:993735af824b 42 else
roykrikke 2:993735af824b 43 printf (" done.\r\n");
roykrikke 2:993735af824b 44 }
roykrikke 0:4cdf28a602a8 45
roykrikke 0:4cdf28a602a8 46 int
roykrikke 0:4cdf28a602a8 47 main () {
roykrikke 0:4cdf28a602a8 48 Serial pc (SERIAL_TX, SERIAL_RX);
roykrikke 0:4cdf28a602a8 49 pc.baud (115200);
roykrikke 0:4cdf28a602a8 50 printf ("Start\n");
roykrikke 0:4cdf28a602a8 51
roykrikke 2:993735af824b 52 int error = 0;
roykrikke 2:993735af824b 53 printf ("Welcome to the filesystem example.\r\n"
roykrikke 2:993735af824b 54 "Formatting a FAT, RAM-backed filesystem. ");
roykrikke 2:993735af824b 55 error = FATFileSystem::format (&bd);
roykrikke 2:993735af824b 56 return_error (error);
roykrikke 2:993735af824b 57
roykrikke 2:993735af824b 58 printf ("Mounting the filesystem on \"/fs\". ");
roykrikke 2:993735af824b 59 error = fs.mount (&bd);
roykrikke 2:993735af824b 60 return_error (error);
roykrikke 2:993735af824b 61
roykrikke 2:993735af824b 62 printf ("Opening a new file, numbers.txt.");
roykrikke 2:993735af824b 63 FILE* fd = fopen ("/fs/numbers.txt", "w");
roykrikke 2:993735af824b 64 errno_error (fd);
roykrikke 2:993735af824b 65
roykrikke 2:993735af824b 66 for (int i = 0; i < 20; i++) {
roykrikke 2:993735af824b 67 printf ("Writing decimal numbers to a file (%d/20)\r", i);
roykrikke 2:993735af824b 68 fprintf (fd, "%d\r\n", i);
roykrikke 0:4cdf28a602a8 69 }
roykrikke 2:993735af824b 70 printf ("Writing decimal numbers to a file (20/20) done.\r\n");
roykrikke 2:993735af824b 71
roykrikke 2:993735af824b 72 printf ("Closing file.");
roykrikke 2:993735af824b 73 fclose (fd);
roykrikke 2:993735af824b 74 printf (" done.\r\n");
roykrikke 0:4cdf28a602a8 75
roykrikke 2:993735af824b 76 printf ("Re-opening file read-only.");
roykrikke 2:993735af824b 77 fd = fopen ("/fs/numbers.txt", "r");
roykrikke 2:993735af824b 78 errno_error (fd);
roykrikke 2:993735af824b 79
roykrikke 2:993735af824b 80 printf ("Dumping file to screen.\r\n");
roykrikke 2:993735af824b 81 char buff[16] = { 0 };
roykrikke 2:993735af824b 82 while (!feof (fd)) {
roykrikke 2:993735af824b 83 int size = fread (&buff[0], 1, 15, fd);
roykrikke 2:993735af824b 84 fwrite (&buff[0], 1, size, stdout);
roykrikke 2:993735af824b 85 }
roykrikke 2:993735af824b 86 printf ("EOF.\r\n");
roykrikke 0:4cdf28a602a8 87
roykrikke 2:993735af824b 88 printf ("Closing file.");
roykrikke 2:993735af824b 89 fclose (fd);
roykrikke 2:993735af824b 90 printf (" done.\r\n");
roykrikke 2:993735af824b 91
roykrikke 2:993735af824b 92 printf ("Opening root directory.");
roykrikke 2:993735af824b 93 DIR* dir = opendir ("/fs/");
roykrikke 2:993735af824b 94 errno_error (fd);
roykrikke 2:993735af824b 95
roykrikke 2:993735af824b 96 struct dirent* de;
roykrikke 2:993735af824b 97 printf ("Printing all filenames:\r\n");
roykrikke 2:993735af824b 98 while ((de = readdir (dir)) != NULL) {
roykrikke 2:993735af824b 99 printf (" %s\r\n", &(de->d_name)[0]);
roykrikke 0:4cdf28a602a8 100 }
roykrikke 0:4cdf28a602a8 101
roykrikke 2:993735af824b 102 printf ("Closeing root directory. ");
roykrikke 2:993735af824b 103 error = closedir (dir);
roykrikke 2:993735af824b 104 return_error (error);
roykrikke 2:993735af824b 105 printf ("Filesystem Demo complete.\r\n");
roykrikke 0:4cdf28a602a8 106
roykrikke 0:4cdf28a602a8 107 // Blink led with 2 Hz
roykrikke 0:4cdf28a602a8 108 while (true) {
roykrikke 0:4cdf28a602a8 109 led = !led;
roykrikke 0:4cdf28a602a8 110 wait (0.5);
roykrikke 0:4cdf28a602a8 111 }
roykrikke 0:4cdf28a602a8 112 }