Add submission # 6676

#6676

Author: ArduinoBot

registry.txt

@@ -8278,3 +8278,4 @@ https://github.com/aneesharnavch/microdsp.git|Contributed|microdsp
 https://github.com/muchaste/Ardoxy.git|Contributed|Ardoxy
 https://github.com/qqqlab/ESPnow-RC.git|Contributed|ESPnow-RC
 https://github.com/AntonioPrevitali/ApJSY333.git|Contributed|ApJSY333
+https://github.com/CQUPTHXC/HXC_CAN.git|Contributed|HXC_CAN