SD Card control on Mbed os5

Please refer following my Notebook page.
/users/kenjiArai/notebook/sd-card-control-new/#

Revision:
4:6d6ea85642ed
Parent:
3:4d7be22641c1
Child:
6:7f8bc932cede
--- a/mbed-os.lib	Sat Aug 17 03:29:11 2019 +0000
+++ b/mbed-os.lib	Tue Dec 24 10:30:40 2019 +0000
@@ -1,1 +1,1 @@
-https://github.com/ARMmbed/mbed-os/#808c45062f940790e1287bd6b8420290c062775c
+https://github.com/ARMmbed/mbed-os/#64853b354fa188bfe8dbd51e78771213c7ed37f7