update compatibility matrix in README

andydoro · andydoro · commit 629d2c47ccd8 · 2016-03-07T12:33:43.000-05:00
diff --git a/README.md b/README.md
@@ -34,7 +34,7 @@ Atmega32u4 @ 8MHz  |      X       |             |            |
 ESP8266            |      X       |             |            | 
 Atmega2560 @ 16MHz |      X       |             |            | 
 ATSAM3X8E          |      X       |             |            | 
-ATSAM21D           |             |             |     X       | 
+ATSAM21D           |      X       |             |            | 
 ATtiny85 @ 16MHz   |             |             |     X       | 
 ATtiny85 @ 8MHz    |             |             |     X       | 
 Intel Curie @ 32MHz |             |             |     X       | 
