NuMaker PWM1 drive +5V DC servo motor

Revision:
11:9772684c13d1
Parent:
6:9bc95d11af03
--- a/mbed-os.lib	Wed Apr 18 16:56:13 2018 +0800
+++ b/mbed-os.lib	Wed Apr 18 16:57:19 2018 +0800
@@ -1,1 +1,1 @@
-https://github.com/ARMmbed/mbed-os/#ca661f9d28526ca8f874b05432493a489c9671ea
+https://github.com/ARMmbed/mbed-os/#f9ee4e849f8cbd64f1ec5fdd4ad256585a208360