motor speed by pwm this depond on that the pwm has t on and t off and t ther is...

卡尔曼滤波在化工传热过程中的应用-Apply of kalman filter in heat sending process in chemical industry.

windows下接收usb转串口的工具，能够支持pxa270开发板！-windows to receive a tool for serial port usb switch, capable of supporting PXA270 development board!

PROFIBUS_PA设备接口的开发与应用（终）.rar-PROFIBUS_PA Device Interface and Application Development (eventually). Rar

应用背景The CMX990 provides, on-chip: a flexible, formattable GMSK packet and freeformat modem, a dual synthesiser fed from an external source, IF and RF transceiver stages for both Rx and Tx modes, and auxiliary ADCs and DACs for system control and monitoring.关键技术Operating in the range of 400MHz to 1GHz at data rates of 4 to 16 kbps. This single-chip, half-duplex device requires a minimum of external components, keeping end-product board size, power consumption and cost to an absolute minimum. The versatile GMSK modem is configured for either packet and freeformat data operation via an efficient task-oriented Rx and Tx format and command structure combined with data scrambling, interleaving and FEC and CRC capabilities. Rx data acquisition, extraction and tracking functions use Rx data-quality feedback to support varying signal environments. IF and RF functions in the Tx path handle all the signal processing requi

ucGUI上的汉字子模提取工具，可将汉字库提取成ucGUI可直接使用的c文件-ucGUI the Chinese Submodules extraction tool, Store can be extracted directly into ucGUI use of the c file

采用等精度测频原理的频率计 要求： 设计一个用等精度测频原理的频率计。 频率测量测量范围1~9999； 其精度为 ； 用4位带小数点数码管显示其频率； 并且具有超量程、欠量程提示功能。-With equal precision frequency measurement principle of the frequency of meter requirements: design of a frequency measurement with the principle of equal precision frequency counter. Frequency Measurement Measuring Range 1 ~ 9999 its accuracy with four with a decimal point LED display its frequency and has a super-range, less range prompts.

在嵌入式系统中对Lattice CPLD软件升级时所需的VME文件生成所需源代码。基于E2PROM存储- Generate the VME file required for updating Lattice CPLD in embedded systems. It is based on E2PROM.

LCD显示程序word文件-LCD display program word document

用plc实现了三项异步电机的控制 工业控制中很实用-Plc implementation with three induction motor control is very useful in industrial control

NXP LPC3000 ARM9 Linux BSP，除了触摸屏外，其它的部分基本包含！-NXP LPC3000 ARM9 Linux BSP, apart from a touch screen, the other part of the basic included!