diff --git a/driver/board_driver/01-led/led.s b/driver/board_driver/01-led/led.s
index 6fb66a5..fc421da 100644
--- a/driver/board_driver/01-led/led.s
+++ b/driver/board_driver/01-led/led.s
@@ -1,6 +1,9 @@
-
-
-
+
+
+.global _start
+
+_start:
+    ldr r0, =0x40000000
 
 
 
diff --git a/driver/board_driver/01-led/makefile b/driver/board_driver/01-led/makefile
new file mode 100644
index 0000000..40b8c67
--- /dev/null
+++ b/driver/board_driver/01-led/makefile
@@ -0,0 +1,7 @@
+
+led:led.s
+	arm-linux-gnueabihf-gcc -c -v led.s
+	arm-linux-gnueabihf-gcc -o led led.o
+
+clean:
+	rm -f *.o
\ No newline at end of file