start sd implementation

main/components/sdcard.h

@@ -0,0 +1,26 @@
+#ifndef SDCARD_COMPONENT
+#define SDCARD_COMPONENT
+
+#include <string.h>
+#include <sys/unistd.h>
+#include <sys/stat.h>
+#include "esp_vfs_fat.h"
+#include "sdmmc_cmd.h"
+#include "../hw/buscfg.h"
+
+#define TAGSD "SDSubsys"
+
+#define COUNTER_FILE "cnt.txt"
+
+#define MOUNT_POINT "/sdcard"
+
+void writeFile(FILE *f, const void *data, size_t size);
+
+extern FILE *csvFile;
+extern FILE *sensFile;
+
+#define MAX_PATH 80
+
+void initSD(void);
+
+#endif