Using SD cards with STM32F407VET6 boards.

Dependencies:   SDFileSystem mbed

Using SD cards with STM32F407VET6 black boards

To use the on-board micro SD card slot with this demo program connect the board pins one another with wires as indicated below.

Wiring
SPI pinsSDIO pins
PC_3<=>PD_2
PC_2<=>PC_8
PB_10<=>PC_12
PC_0<=>PC_11
Revision:
0:fad6683294f8
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Apr 28 10:03:42 2018 +0000
@@ -0,0 +1,77 @@
+#include "mbed.h"
+#include "SDFileSystem.h"
+#include "errno.h"
+
+SDFileSystem    fs(PC_3, PC_2, PB_10, PC_0, "sd");  // mosi, miso, sck, cs
+FILE*           fp;
+
+/**
+ * @brief
+ * @note
+ * @param
+ * @retval
+ */
+int main()
+{
+    printf("Mounting file system...\r\n");
+
+    int err = fs.mount();
+    printf("%s\r\n", (err ? "Failed :(\r\n" : "OK\r\n"));
+    if (err)
+        return err;
+
+    // Open the file.
+    printf("Opening file '/sd/mytest/sdtest.txt'... ");
+    fp = fopen("/sd/mytest/sdtest.txt", "w+");
+    printf("%s\r\n", (!fp ? "Failed :(\r\n" : "OK\r\n"));
+
+    if (!fp)
+    {
+        // Check whether directory '/sd/mytest' exists.
+        printf("\r\nChecking directory '/sd/mytest'...\r\n");
+
+        struct stat info;
+        err = stat("/sd/mytest", &info);
+        if (err)
+        {
+            printf("Directory '/sd/mytest' does not exist.\r\n");
+            printf("Trying to create it...");
+            err = mkdir("/sd/mytest", 0777);
+            printf("%s\r\n", (err ? "Failed :(\r\n" : "OK\r\n"));
+            if (err)
+                return err;
+        }
+
+        // Create a new 'sdtest.txt' file.
+        printf("File not found, creating a new one...\r\n");
+        fp = fopen("/sd/mytest/sdtest.txt", "w+");
+        printf("%s\r\n", (!fp ? "Failed :(" : "OK"));
+        if (!fp)
+        {
+            error("error: %s (%d)\r\n", strerror(errno), -errno);
+            return errno;
+        }
+    }
+
+    for (int i = 0; i < 10; i++)
+    {
+        printf("Writing numbers (%d/%d)... ", i, 10);
+        err = fprintf(fp, "    %d\r\n", i);
+        if (err < 0)
+        {
+            printf("Fail :(\r\n");
+            error("error: %s (%d)\r\n", strerror(errno), -errno);
+        }
+        else
+            printf("OK\r\n");
+    }
+
+    printf("Writing numbers (%d/%d)... OK\r\n\r\n", 10, 10);
+    err = fclose(fp);
+    printf("Closing file '/sd/mytest/sdtest.txt'... ");
+    printf("%s\r\n", (err ? "Failed :(\r\n" : "OK\r\n"));
+    if (err)
+        return err;
+
+    return 0;
+}