1 files changed, 7 insertions, 0 deletions
diff --git a/demos/ARMCM3-STM32F103-FATFS-GCC/main.c b/demos/ARMCM3-STM32F103-FATFS-GCC/main.c
index e01977ac0..ef06c6614 100644
--- a/demos/ARMCM3-STM32F103-FATFS-GCC/main.c
+++ b/demos/ARMCM3-STM32F103-FATFS-GCC/main.c
@@ -105,6 +105,8 @@ static void TimerHandler(eventid_t id) {
  */
 static void InsertHandler(eventid_t id) {
   FRESULT err;
+  uint32_t clusters;
+  FATFS *fsp;
 
   (void)id;
   /*
@@ -117,6 +119,11 @@ static void InsertHandler(eventid_t id) {
     mmcDisconnect(&MMCD1);
     return;
   }
+  err = f_getfree("/", &clusters, &fsp);
+  if (err != FR_OK) {
+    mmcDisconnect(&MMCD1);
+    return;
+  }
 }
 
 /*