added loggint to SD card

Application/BSP/BSP_SDLogger.h

@@ -1,4 +1,12 @@
 // SD logger steam is logged to sd card
 // buffernd logger collect logs until some amount of data is collected.
 // needs to be flushed before shutdown
-// used with ULOG 
+// used with ULOG
+
+#include <stdint.h>
+#include <stddef.h>
+
+void BSP_SDLogger_Init(int log_number);
+
+
+void BSP_SDLogger_Write(char *data, size_t length);