1 files changed, 12 insertions, 1 deletions
diff --git a/include/stream.h b/include/stream.h
index 96d9823..73b3daa 100644
--- a/include/stream.h
+++ b/include/stream.h
@@ -1,7 +1,16 @@
 #include <stdint.h>
 #include <stddef.h>
 
-/* typedef struct p_stream_s p_stream_t; */
+#ifndef __STREAM_H
+#define __STREAM_H
+/* 
+ * Struct for abstract stream
+ *
+ * Stream properties: generalized variables for individual devices
+ *     props[0]: Peripheral device (fd, hi2c, huart, and so on)
+ *     props[1]: Bus device ID
+ *     
+ */
 
 typedef struct {
     int (*read)(uint8_t *buf, size_t len, void **vptr, void *sptr);
@@ -9,3 +18,5 @@ typedef struct {
     int (*init)(void **vptr, void *sptr);
     void **props;
 } p_stream_t;
+
+#endif