woodstock .
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
This circuit diagram was created by fritzing.
| TFT J4 | Nucleo |
|---|---|
| SD_CS | PA_9 |
| SD_MOSI | PB_15 |
| SD_MISO | PB_14 |
| SD_SCK | PB_13 |
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
Revision 0:b0a3ecd53c7d, committed 2016-03-21
- Comitter:
- beaglescout007
- Date:
- Mon Mar 21 08:58:22 2016 +0000
- Commit message:
- Release
Changed in this revision
diff -r 000000000000 -r b0a3ecd53c7d SDFileSystem.lib --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/SDFileSystem.lib Mon Mar 21 08:58:22 2016 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/neilt6/code/SDFileSystem/#3fa5eaf48e81
diff -r 000000000000 -r b0a3ecd53c7d main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Mon Mar 21 08:58:22 2016 +0000
@@ -0,0 +1,46 @@
+#include "mbed.h"
+#include "SDFileSystem.h"
+
+DigitalIn btn(USER_BUTTON);
+
+// trim '\n'
+void ntrim(char *str)
+{
+ int i;
+ for (i = 0; str[i] != 0; ++i);
+
+ if (i > 0 && str[i - 1] == '\n')
+ str[i - 1] = 0;
+}
+
+int main()
+{
+ // SD filesystem
+ 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
+
+ while (1)
+ {
+ if (btn) continue;
+
+ // file open
+ FILE *fp = fopen("/sd/test.txt", "r");
+ if (fp == NULL)
+ {
+ printf("open error!!\r\n");
+ while(1);
+ }
+
+ // read text file
+ char buf[1024];
+ while (fgets(buf, sizeof(buf), fp) != NULL)
+ {
+ ntrim(buf);
+ printf("%s\r\n", buf);
+ }
+
+ // file close
+ fclose(fp);
+
+ wait(1);
+ }
+}
diff -r 000000000000 -r b0a3ecd53c7d mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Mon Mar 21 08:58:22 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/c0f6e94411f5 \ No newline at end of file