问题:
http://www.deyisupport.com/question_answer/wireless_connectivity/bluetooth/f/103/t/62156.aspx
参考资料:http://91r.net/ask/2035567.html
参考资料: http://www.18650.com.cn/news/15373393.html
Quartus II编译提示:“Error: Signal "B" drives an input pin”