有关start的使用相关说明，请参考如下链接，建议在user guide中熟悉基本应有流程，在reference manual中熟悉下软件的框架结构，谢谢！
1.start 启动网址 http://start.atmel.com/#
2.Atmel START User Guide http://atmel-studio-doc.s3-website-us-east-1.amazonaws.com/webhelp/GUID-4E095027-601A-4343-844F-2034603B4C9C-en-US-1/index.html?GUID-31CAFDCB-DD38-462B-893D-B5A7DC63B24A
3.ASF4 API Reference Manual http://atmel-studio-doc.s3-website-us-east-1.amazonaws.com/webhelp/GUID-2A8AADED-413E-4021-AF0C-D99E61B8160D-en-US-1/index.html?GUID-114A439B-E85D-46AB-B76E-20DA43F285CA
4.ASF4 API Reference Manual pdf版本下载地址 https://github.com/yuchengstudio/START/blob/master/ASF4%20API%20Reference%20Manual.pdf