dylan1: add study.c study.h

study/study.c

@@ -0,0 +1,10 @@
+#include "study.h"
+uint8_t g_class;
+void study_set_class(uint8_t class)
+{
+	g_class = class;
+}
+uint8_t study_get_class(void)
+{
+	return g_class;
+}

study/study.h

@@ -0,0 +1,4 @@
+#include "stdio.h"
+
+void study_set_class(uint8_t class);
+uint8_t study_get_class(void);