added I2C control function (Original program cannot handle I2C constructor)

Dependencies:   TextLCD X_NUCLEO_53L0A1

Fork of HelloWorld_53L0A1 by ST

Revision:
13:5a59de800135
Parent:
12:e9dedf2d2560
diff -r e9dedf2d2560 -r 5a59de800135 mbed.bld
--- a/mbed.bld	Mon Dec 18 09:56:04 2017 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-https://mbed.org/users/mbed_official/code/mbed/builds/e2bfab296f20
\ No newline at end of file