diff --git a/sw/main.c b/sw/main.c
index 33c14ce..77caeb0 100644
--- a/sw/main.c
+++ b/sw/main.c
@@ -1,3 +1,11 @@
+#define SEVEN_SEG 0x7ff0
+
+#include <stdint.h>
+
 int main() {
+    uint16_t* seven_seg;
+    seven_seg = (uint16_t*)SEVEN_SEG;
+
+    *seven_seg = 0xa5a5;
     return 0;
 }