woodstock . / Mbed 2 deprecated Nucleo_Ex05_SD

This example demonstrates the reading of the SD card in the Nucleo.

Dependencies:   SDFileSystem mbed

Intro

This example demonstrates the reading of the SD card in the Nucleo.

Parts

STM32 Nucleo F446RE
QVGA 2.2 TFT SPI (with the SD card slot)
Breadboard
Wires

Wiring diagram

/media/uploads/beaglescout007/nucleo_ex05_sd.png This circuit diagram was created by fritzing.

/media/uploads/beaglescout007/tft_back.jpg

TFT J4Nucleo
SD_CSPA_9
SD_MOSIPB_15
SD_MISOPB_14
SD_SCKPB_13

https://youtu.be/nBRZO8_q78I

Used Library

Import librarySDFileSystem

A re-written SDFileSystem library with improved compatibility, CRC support, and card removal/replacement support.

Last commit 29 Aug 2016 by Neil Thiessen

main.cpp@0:b0a3ecd53c7d, 2016-03-21 (annotated)

Committer:
beaglescout007
Date:
Mon Mar 21 08:58:22 2016 +0000
Revision:
0:b0a3ecd53c7d
Release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
beaglescout007 0:b0a3ecd53c7d 1 #include "mbed.h"
beaglescout007 0:b0a3ecd53c7d 2 #include "SDFileSystem.h"
beaglescout007 0:b0a3ecd53c7d 3
beaglescout007 0:b0a3ecd53c7d 4 DigitalIn btn(USER_BUTTON);
beaglescout007 0:b0a3ecd53c7d 5
beaglescout007 0:b0a3ecd53c7d 6 // trim '\n'
beaglescout007 0:b0a3ecd53c7d 7 void ntrim(char *str)
beaglescout007 0:b0a3ecd53c7d 8 {
beaglescout007 0:b0a3ecd53c7d 9 int i;
beaglescout007 0:b0a3ecd53c7d 10 for (i = 0; str[i] != 0; ++i);
beaglescout007 0:b0a3ecd53c7d 11
beaglescout007 0:b0a3ecd53c7d 12 if (i > 0 && str[i - 1] == '\n')
beaglescout007 0:b0a3ecd53c7d 13 str[i - 1] = 0;
beaglescout007 0:b0a3ecd53c7d 14 }
beaglescout007 0:b0a3ecd53c7d 15
beaglescout007 0:b0a3ecd53c7d 16 int main()
beaglescout007 0:b0a3ecd53c7d 17 {
beaglescout007 0:b0a3ecd53c7d 18 // SD filesystem
beaglescout007 0:b0a3ecd53c7d 19 SDFileSystem *sd = new SDFileSystem(PB_15, PB_14, PB_13, PA_9, "sd", NC, SDFileSystem::SWITCH_NONE, 20000000); // mosi, miso, sclk, name, card detect, sw type, freq
beaglescout007 0:b0a3ecd53c7d 20
beaglescout007 0:b0a3ecd53c7d 21 while (1)
beaglescout007 0:b0a3ecd53c7d 22 {
beaglescout007 0:b0a3ecd53c7d 23 if (btn) continue;
beaglescout007 0:b0a3ecd53c7d 24
beaglescout007 0:b0a3ecd53c7d 25 // file open
beaglescout007 0:b0a3ecd53c7d 26 FILE *fp = fopen("/sd/test.txt", "r");
beaglescout007 0:b0a3ecd53c7d 27 if (fp == NULL)
beaglescout007 0:b0a3ecd53c7d 28 {
beaglescout007 0:b0a3ecd53c7d 29 printf("open error!!\r\n");
beaglescout007 0:b0a3ecd53c7d 30 while(1);
beaglescout007 0:b0a3ecd53c7d 31 }
beaglescout007 0:b0a3ecd53c7d 32
beaglescout007 0:b0a3ecd53c7d 33 // read text file
beaglescout007 0:b0a3ecd53c7d 34 char buf[1024];
beaglescout007 0:b0a3ecd53c7d 35 while (fgets(buf, sizeof(buf), fp) != NULL)
beaglescout007 0:b0a3ecd53c7d 36 {
beaglescout007 0:b0a3ecd53c7d 37 ntrim(buf);
beaglescout007 0:b0a3ecd53c7d 38 printf("%s\r\n", buf);
beaglescout007 0:b0a3ecd53c7d 39 }
beaglescout007 0:b0a3ecd53c7d 40
beaglescout007 0:b0a3ecd53c7d 41 // file close
beaglescout007 0:b0a3ecd53c7d 42 fclose(fp);
beaglescout007 0:b0a3ecd53c7d 43
beaglescout007 0:b0a3ecd53c7d 44 wait(1);
beaglescout007 0:b0a3ecd53c7d 45 }
beaglescout007 0:b0a3ecd53c7d 46 }