diff --git a/firmware/filesystem/Makefile b/firmware/filesystem/Makefile
index 76b2d19..20e6137 100644
--- a/firmware/filesystem/Makefile
+++ b/firmware/filesystem/Makefile
@@ -12,6 +12,7 @@ OBJS += at45db041d.o
 OBJS += util.o
 OBJS += select.o
 OBJS += execute.o
+OBJS += format.o
 
 LIBNAME=fat
 
diff --git a/firmware/filesystem/format.c b/firmware/filesystem/format.c
new file mode 100644
index 0000000..7b9b55c
--- /dev/null
+++ b/firmware/filesystem/format.c
@@ -0,0 +1,55 @@
+#include <sysinit.h>
+
+#include "basic/basic.h"
+#include "basic/config.h"
+
+#include "usb/usbmsc.h"
+
+#include "lcd/print.h"
+
+#include "funk/nrf24l01p.h"
+#include "funk/mesh.h"
+#include "filesystem/at45db041d.h"
+
+uint8_t init1[] = {0xeb, 0xfe, 0x90, 0x4d, 0x53, 0x44, 0x4f, 0x53,
+                   0x35, 0x2e, 0x30, 0x00, 0x02, 0x01, 0x01, 0x00,
+                   0x01, 0x00, 0x02, 0x00, 0x04, 0xf0, 0x04, 0x00,
+                   0x3f, 0x00, 0xff};
+
+uint8_t init2[] = {0x80, 0x00, 0x29, 0x37,
+                   0x4b, 0x55, 0x33, 0x4e, 0x4f, 0x20, 0x4e, 0x41,
+                   0x4d, 0x45, 0x20, 0x20, 0x20, 0x20, 0x46, 0x41,
+                   0x54, 0x20, 0x20, 0x20, 0x20, 0x20};
+
+
+
+void format_formatDF(void)
+{
+	int n,i;
+	char buf[512];
+
+    dataflash_initialize();
+    delayms(100);
+    
+    for(i=0; i< 512; i++) buf[i] = 0x00;
+
+    for(i=0; i<1024; i++)
+        dataflash_write(buf, i, 1);
+    memcpy(buf, init1, sizeof(init1));
+    memcpy(buf+0x24, init2, sizeof(init2));
+    
+    buf[510] = 0x55;
+    buf[511] = 0xaa;
+    //memcpy(buf+510, "\x55\xaa", 2);
+    
+    dataflash_write(buf, 0, 1);
+
+    for(i=0; i< 512; i++) buf[i] = 0x00;
+
+    buf[0] = 0xf0;
+    buf[1] = 0xff;
+    buf[2] = 0xff;
+    dataflash_write(buf, 1, 1);
+
+}
+
diff --git a/firmware/filesystem/format.h b/firmware/filesystem/format.h
new file mode 100644
index 0000000..902f57a
--- /dev/null
+++ b/firmware/filesystem/format.h
@@ -0,0 +1,6 @@
+#ifndef __FORMAT_H_
+#define __FORMAT_H_
+
+void format_formatDF(void);
+
+#endif