mbed-os5 only for TYBLE16

Dependents:   TYBLE16_simple_data_logger TYBLE16_MP3_Air

Revision:
1:9db0e321a9f4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/DOXYGEN_FRONTPAGE.md	Tue Dec 31 06:02:27 2019 +0000
@@ -0,0 +1,8 @@
+# mbed OS code base
+
+This is the code documentation for mbed OS.
+
+For more information, please see:
+
+* [The mbed OS API References](https://docs.mbed.com/docs/mbed-os-api-reference/)
+* [The mbed OS Handbook](https://docs.mbed.com/docs/mbed-os-handbook/)