1 files changed, 20 insertions, 0 deletions
diff --git a/02.5-collatz/include/flash.h b/02.5-collatz/include/flash.h
new file mode 100644
index 0000000..a163a25
--- /dev/null
+++ b/02.5-collatz/include/flash.h
@@ -0,0 +1,20 @@
+#ifndef H__FLASH_
+#define H__FLASH_
+
+#include "common.h"
+
+/*
+ * Header file for dealing with flash.
+ */
+
+#define FLASH_BASE 0x40022000
+
+typedef struct {
+  __IO uint32_t ac_r; /* Flash access control register. */
+
+  /* TODO fill out the rest. */
+} PACKED flash_t;
+
+#define FLASH (*(__IO flash_t*)FLASH_BASE)
+
+#endif /* H__FLASH_ */