test FatFS

increment counter on each boot

Core/Src/freertos.c

@@ -22,7 +22,7 @@
 #include "task.h"
 #include "main.h"
 #include "cmsis_os.h"
-
+#include "fatfs.h"
 /* Private includes ----------------------------------------------------------*/
 /* USER CODE BEGIN Includes */
 #include "UsbDataHandler.h"
@@ -115,8 +115,23 @@ void MX_FREERTOS_Init(void) {
 void StartDefaultTask(void *argument)
 {
   /* init code for USB_DEVICE */
-  MX_USB_DEVICE_Init();
   /* USER CODE BEGIN StartDefaultTask */
+
+
+  retSD = f_mount(&SDFatFS,SDPath,0);
+  retSD =  f_open(&SDFile, "counter.bin", FA_READ);
+  
+  uint64_t counter = 0;
+  unsigned int size=0;
+  if(retSD == 0) {
+    retSD = f_read(&SDFile, &counter, sizeof(counter),&size);
+  }
+  retSD = f_close(&SDFile);
+  counter++;
+  retSD = f_open(&SDFile, "counter.bin", FA_CREATE_ALWAYS | FA_WRITE);
+  retSD = f_write(&SDFile,&counter,sizeof(counter),&size);
+  retSD = f_close(&SDFile);
+
   /* Infinite loop */
   for(;;)
   {