pulse consistency test using wait_us

Revision:
1:0f0c1a9a174a
Parent:
0:18409537564c
--- a/SoftPWM.lib	Sat Mar 30 06:37:35 2019 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-https://os.mbed.com/users/komaida424/code/SoftPWM/#7918ce37626c