大概找了找资料,看不太懂,也不知道行不行,您参考下试试:
http://blog.csdn.net/harbinzju/article/details/7023630
http://www.doc88.com/p-181616654261.html
http://blog.163.com/bestfighter_210@126/blog/static/10361887201023134118608/
http://www.eefocus.com/embedded/268057
http://it.people.com.cn/GB/119390/118343/148712/148715/8939231.html