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The UsbKbd example WDM device driver illustrates how to interrogate a USB device, specifically a USB keyboard.

Very suitable for beginners to use JAVA development PPT course equipped with Microsoft s office software will be able to view the open let us begin

The VISA probes for LabVIEW 7.0 greatly extend the amount of relevant information displayed when using LabVIEW probes on VISA refnums. They are used automatically by LabVIEW in place of the generic probe when they are installed.

Plait distance machine, very friendly of download line, a lot of list slice machine all can total use

计算一段程序运行的时间，可精确到us 误差小；

C51源程序集锦 This a demo program showing a way to perform simultaneous RS-232 transmit and receive using only one hardware timer. The transmit and receive routines divide each bit time into 4 slices to allow synchronizing to incoming data that may be out of synch with outgoing data. ...

以CPLD器件EPM7128SLC84-15为核心实现的简易数字频率计，采用在一定时间内对数字脉冲计数的方法，可直接测量TTL电平的数字脉冲信号的频率、周期和脉宽。其他一些信号可经过信号预处理电路变换后测量。 量程：1Hz～999999Hz 输入信号：（1）TTL电平数字脉冲信号；（2）方波/正弦波，幅度0.5~5V 显示：七段数码管显示频率（Hz ...

应用单片机的时候，经常会遇到需要短时间延时的情况。需要的延时时间很短，一般都是几十到几百微妙(us)。有时候还需要很高的精度，比如用单片机驱动DS18B20的时候，误差容许的范围在十几us以内，不然很容易出错。这种情况下，用计时器往往有点小题大做。而在极端的情况下，计时器甚至已经全部派上了别的用途。这时就需要我 ...

this program is very interesting for to calculate with simple operation and advance operation. simple operation such us +,-,:,x and advance operation such as calculate sin,cos and tan implementation

CT DCOM源代码，实现CT MR US等DICOM格式转换。