在百色郊区割接的基站中有两载波的百色市火车站和Pilot Beacon基站(交警大厦),两个基站的直线距离为1.127Km(使用Mapinfo测算的距离),存在201通过pb向283的异频硬切换(包括Data & Voice)。
上传时间: 2013-11-12
上传用户:aysyzxzm
This example shows how to update at regulate period the WWDG counter using theEarly Wakeup interrupt (EWI). The WWDG timeout is set to 262ms, refresh window set to 41h and the EWI isenabled. When the WWDG counter reaches 40h the EWI is generated and in the WWDGISR the counter is refreshed to prevent a WWDG reset and led connected to PC.07is toggled.The EXTI line9 is connected to pb.09 pin and configured to generate an interrupton falling edge.In the NVIC, EXTI line9 to 5 interrupt vector is enabled with priority equal to 0and the WWDG interrupt vector is enabled with priority equal to 1 (EXTI IT > WWDG IT). The EXTI Line9 will be used to simulate a software failure: once the EXTI line9event occurs (by pressing Key push-button on EVAL board) the correspondent interruptis served, in the ISR the led connected to PC.07 is turned off and the EXTI line9pending bit is not cleared. So the CPU will execute indefinitely EXTI line9 ISR andthe WWDG ISR will never be entered(WWDG counter not updated). As result, when theWWDG counter falls to 3Fh the WWDG reset occurs.If the EXTI line9 event don抰 occurs the WWDG counter is indefinitely refreshed inthe WWDG ISR which prevent from WWDG reset. If the WWDG reset is generated, after resuming from reset a led connected to PC.06is turned on. In this example the system is clocked by the HSE(8MHz).
上传时间: 2013-11-11
上传用户:gundamwzc
拖动开发代码,关于pb 的
标签: 代码
上传时间: 2015-01-20
上传用户:sk5201314
屏保开发代码,关于pb 的
上传时间: 2014-01-05
上传用户:aappkkee
一般的登陆验证开发代码,关于pb 的
标签: 代码
上传时间: 2015-01-20
上传用户:leehom61
一个非常不错的商业进销存软件,用pb写的。
上传时间: 2014-11-01
上传用户:坏天使kk
很普通的一个程序,数据库的应用,pb编写的
标签: 程序
上传时间: 2015-03-08
上传用户:66666
程控交换机电话自动计费软件,开发环境pb,无密码
上传时间: 2015-03-10
上传用户:lhc9102
人事管理系统源码(三套不同的)这是第二套!忘记说明了,这三套系统是pb的!
上传时间: 2014-01-22
上传用户:wanghui2438
医院管理系统,使用的PowerBuilder开发的管理系统,主要的是使用pb的数据窗口来完成对后台数据库的操作,非常方便。
标签: 管理系统
上传时间: 2015-03-15
上传用户:GavinNeko