Add I2CSlave to ov580 master.

Dependencies:   MorseGenerator2

Revision:
0:605fe136b7ea
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/.gitignore	Fri Oct 19 01:51:42 2018 +0000
@@ -0,0 +1,4 @@
+.build
+.mbed
+projectfiles
+*.py*