Bare-metal configuration with EventQueue for a Bluepill board.

Warning

It does not work with the Mbed Online Compiler.

Follow these steps to import and compile it with Mbed CLI:

mbed import https://os.mbed.com/users/hudakz/code/Baremetal_EventQue_Bluepill
mbed compile -t GCC_ARM -m bluepill
Revision:
4:b57198581ca4
Parent:
2:f6392c8bd0e0
--- a/mbed_app.json	Mon May 18 15:26:33 2020 +0000
+++ b/mbed_app.json	Thu Jun 04 21:49:34 2020 +0000
@@ -6,7 +6,6 @@
             "platform.stdio-convert-newlines"   : true,
             "platform.stdio-buffered-serial"    : true,
             "platform.stdio-flush-at-exit"      : true,
-            "platform.callback-nontrivial"      : true,
             "target.tickless-from-us-ticker"    : true,
             "target.c_lib"                      : "small"
         }