included xilinx FAT and SD code

bsp_z7/main.c

@@ -14,6 +14,7 @@
 #include "xscugic.h"
 #include "xscutimer.h"
 #include "xuartps_hw.h"
+#include "ff.h"
 
 /*
  * Configure the hardware as necessary to run this demo.
@@ -47,6 +48,8 @@ XScuGic xInterruptController;
 
 extern SemaphoreHandle_t malloc_mutex;
 
+FATFS fatfs;
+
 int get_descriptor_rw() {
   return 1;
 }
@@ -61,7 +64,33 @@ int main(void) {
   /* Configure the hardware ready to run. */
   prvSetupHardware();
 
-   mission();
+  FRESULT rc;
+  FIL fil;
+	TCHAR *path = "0:/"; /* Logical drive number is 0 */
+  uint8_t buffer[100];
+  buffer[0] = 'a';
+  buffer[1] = 'b';
+  buffer[2] = 'c';
+  buffer[3] = 'd';
+  UINT read_size;
+
+	/* Register volume work area, initialize device */
+	rc = f_mount(&fatfs, path, 0);
+  xil_printf("mount: %i\n", rc);
+  rc = f_open(&fil, "file.txt", FA_READ | FA_WRITE);
+  xil_printf("open: %i\n", rc);
+  rc = f_write(&fil, buffer, 1, &read_size );
+  xil_printf("write: %i\n", rc);
+  f_lseek(&fil, 0);
+  rc = f_read(&fil, buffer, sizeof(buffer), &read_size );
+  xil_printf("read: %i: ", rc);
+  for (int i = 0; i < read_size; i++) {
+    xil_printf("%c (%02x) ", buffer[i], buffer[i]);
+  }
+  xil_printf("\n");
+  f_close(&fil);
+
+  mission();
 }
 
 static void prvSetupHardware(void) {