Basic implementation of watchdog

Dependencies:   STM_ResetSupervisor USBDevice

Revision:
2:50b1371247da
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/STM_ResetSupervisor.lib	Sun Oct 06 02:59:58 2019 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/teams/PointLabs/code/STM_ResetSupervisor/#f31b32884780