Using USBSerial on BLACKPILL board.

For more details click on the link below:

Import programBlackpill_Hello

Using low cost Blackpill (STM32F411CEU6) boards with mbed.

Revision:
2:9625237e90fa
Parent:
0:2912fe6f7530
--- a/mbed-os.lib	Sat Jan 30 11:20:01 2021 +0000
+++ b/mbed-os.lib	Thu Feb 11 06:28:02 2021 +0000
@@ -1,1 +1,1 @@
-https://github.com/ARMmbed/mbed-os/#cf4f12a123c05fcae83fc56d76442015cb8a39e9
+https://github.com/ARMmbed/mbed-os/#0c6753bb821612eb72b5f682aed7ffcc98e80a1f