Roy Krikke / Mbed OS DISCO-F746NG_BLOCK_DEVICE_SDCARD

Example of using block device class for creating a block device to access a SD/MMC card via SD/MMC interface on DISCO_F746NG

Dependencies:   BD_SD_DISCO_F746NG

Example of using block device class for creating a block device to access a SD/MMC card via SD/MMC interface on DISCO_F746NG development board. This block device API provides an interface for access to block-based storage. You can use a block device to back a full file system or write to it directly. More about Block Devices

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main.cpp@2:d64219bde156, 2018-04-04 (annotated)

Committer:
roykrikke
Date:
Wed Apr 04 19:55:23 2018 +0000
Revision:
2:d64219bde156
Parent:
1:ffacc9d0b308 
Code Style & Formatting

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 2:d64219bde156 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 2:d64219bde156 7 *
roykrikke 1:ffacc9d0b308 8 * http://www.apache.org/licenses/LICENSE-2.0
roykrikke 2:d64219bde156 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:d64219bde156 19 #include "SDBlockDeviceDISCOF746NG.h"
roykrikke 0:4cdf28a602a8 20
roykrikke 0:4cdf28a602a8 21 DigitalOut led (LED1);
roykrikke 0:4cdf28a602a8 22
roykrikke 0:4cdf28a602a8 23 // Instantiate the Block Device for sd card on DISCO-F746NG
roykrikke 2:d64219bde156 24 SDBlockDeviceDISCOF746NG bd;
roykrikke 0:4cdf28a602a8 25 uint8_t block[512] = "Hello World!\n";
roykrikke 0:4cdf28a602a8 26
roykrikke 0:4cdf28a602a8 27 int
roykrikke 2:d64219bde156 28 main ()
roykrikke 2:d64219bde156 29 {
roykrikke 2:d64219bde156 30 Serial pc (SERIAL_TX, SERIAL_RX);
roykrikke 2:d64219bde156 31 pc.baud(115200);
roykrikke 2:d64219bde156 32 printf("Start\n");
roykrikke 2:d64219bde156 33
roykrikke 2:d64219bde156 34 // Call the SDBlockDeviceDISCOF746NG instance initialisation method.
roykrikke 2:d64219bde156 35 printf("sd card init...\n");
roykrikke 2:d64219bde156 36 if (0 != bd.init()) {
roykrikke 2:d64219bde156 37 printf("Init failed \n");
roykrikke 2:d64219bde156 38 return -1;
roykrikke 2:d64219bde156 39 }
roykrikke 0:4cdf28a602a8 40
roykrikke 2:d64219bde156 41 printf("sd size: %llu\n", bd.size());
roykrikke 2:d64219bde156 42 printf("sd read size: %llu\n", bd.get_read_size());
roykrikke 2:d64219bde156 43 printf("sd program size: %llu\n", bd.get_program_size());
roykrikke 2:d64219bde156 44 printf("sd erase size: %llu\n\n", bd.get_erase_size());
roykrikke 2:d64219bde156 45
roykrikke 2:d64219bde156 46 printf("sd erase...\n");
roykrikke 2:d64219bde156 47 if (0 != bd.erase (0, bd.get_erase_size())) {
roykrikke 2:d64219bde156 48 printf("Error Erasing block \n");
roykrikke 2:d64219bde156 49 }
roykrikke 0:4cdf28a602a8 50
roykrikke 2:d64219bde156 51 // Write some the data block to the device
roykrikke 2:d64219bde156 52 printf("sd write: %s\n", block);
roykrikke 2:d64219bde156 53 if (0 == bd.program(block, 0, 512)) {
roykrikke 2:d64219bde156 54 // read the data block from the device
roykrikke 2:d64219bde156 55 printf("sd read: ");
roykrikke 2:d64219bde156 56 if (0 == bd.read(block, 0, 512)) {
roykrikke 2:d64219bde156 57 // print the contents of the block
roykrikke 2:d64219bde156 58 printf("%s", block);
roykrikke 2:d64219bde156 59 }
roykrikke 2:d64219bde156 60 }
roykrikke 0:4cdf28a602a8 61
roykrikke 2:d64219bde156 62 ////////////////////////////////////////////////////////////////////////////////
roykrikke 2:d64219bde156 63
roykrikke 2:d64219bde156 64 for(int i; i < 10; i++) {
roykrikke 2:d64219bde156 65 memset(block, i, sizeof(block));
roykrikke 2:d64219bde156 66 if(bd.program(block, (i*512), sizeof(block)) != 0) {
roykrikke 2:d64219bde156 67 printf("Error at: %i\r\n",i);
roykrikke 2:d64219bde156 68 }
roykrikke 0:4cdf28a602a8 69 }
roykrikke 2:d64219bde156 70
roykrikke 2:d64219bde156 71 if(bd.erase((1*512), sizeof(block)) != 0) {
roykrikke 2:d64219bde156 72 printf("Error Erasing block\n");
roykrikke 2:d64219bde156 73 }
roykrikke 0:4cdf28a602a8 74
roykrikke 2:d64219bde156 75 memset(block, 'x', sizeof(block));
roykrikke 2:d64219bde156 76 if(bd.program(block, (1*512), sizeof(block)) != 0) {
roykrikke 2:d64219bde156 77 printf("Error\r\n");
roykrikke 2:d64219bde156 78 }
roykrikke 2:d64219bde156 79
roykrikke 2:d64219bde156 80 ////////////////////////////////////////////////////////////////////////////////
roykrikke 0:4cdf28a602a8 81
roykrikke 2:d64219bde156 82 // Call the BD_SD_DISCO_F746NG instance de-initialisation method.
roykrikke 2:d64219bde156 83 printf("sd card deinit...\n");
roykrikke 2:d64219bde156 84 if (0 != bd.deinit()) {
roykrikke 2:d64219bde156 85 printf ("Deinit failed \n");
roykrikke 2:d64219bde156 86 return -1;
roykrikke 2:d64219bde156 87 }
roykrikke 2:d64219bde156 88
roykrikke 2:d64219bde156 89 // Blink led with 2 Hz
roykrikke 2:d64219bde156 90 while(true) {
roykrikke 2:d64219bde156 91 led = !led;
roykrikke 2:d64219bde156 92 wait (0.5);
roykrikke 2:d64219bde156 93 }
roykrikke 0:4cdf28a602a8 94 }