基于F020的DDS， 非常常用的程序， AD9851在电子竞赛中，经常用到。...

visual socpe 的通信协议。只需更改宏，即可适用于不同平台#define UART_VS_PORT         #define UART_SendData(data)  默认给出的是STM32的驱动。

资源描述This application note shows how to control a permanent magnet synchronous motor (PMSM) with the sensorless field-oriented control (FOC) algorithm, using an ARM® Cortex®-M0-based PSoC 4 device. The FOC algorithm is frequently used in motor control applications because it allows motors to operate with less noise and more stable torque output than other algorithms. Sensorless FOC adds the advantage of reducing the cost due to the absence of rotor position sensors. Sensorless FOC is used in many applications including consumer (air conditioner, refrigerator), industrial (blower, pump), and commercial (elevator, escalator) products.

i2c总线的verilog代码，绝对好用-i2c bus Verilog code, the absolute ease of use

RAM掉电保护电路--Design of RAM power-off protection circuit.

基于ARM7的无纸记录仪的U盘读写方法(请多指教）-ARM7-based Paperless Recorder U-disk read and write methods (please advise)

针对AT91RM9200的U-BOOT1.30制作的官方AT91RM9200DK的补丁，FLASH为28F128J3A，-AT91RM9200 for the U-BOOT1.30 produced AT91RM9200DK official patch, FLASH for 28F128J3A,

嵌入式原理作业嵌入式原理及应用试题- embedded principle and application questions

> CONTACT, NORMALLY OPEN        Xname           Rname          Yname                              ----] [----     ----] [----    ----] [----     If the signal going into the instruction is false, then the output     signal is false. If the signal going into the instruction is true,     then the output signal is true if and only if the given input pin,     output pin, or internal relay is true, else it is false. This     instruction can examine the state of an input pin, an output pin,     or an internal relay. >

应用背景 所有红外遥控器的输出都是用编码后串行数据对38～40kHz的方波进行脉冲幅度调制而产生的。如果直接对已调波进行测量，由于单片机的指令周期是微秒（μs）级，而已调波的脉宽只有20多μs，会产生很大的误差。因此先要对已调波进行解调，对解调后的波形进行测量。红外遥控接收芯片CX20106可以完成对遥控信号的前置放大、限幅放大、带通滤波、峰值检波和波形整形，只需加上简单的外围电路即可完成对已调波的解调 关键技术 用红外转发器控制电器，首先要进行对码，把要控制的家电遥控器对准红外转发器，把遥控器的功能键学习到红外转发器中，学习成功后，就可以控制了，例如，学习了空调遥控器的开、关，用POLYHOME智能主机操作空调开，主机发出射频信号到红外转发器，红外转发器把射频信号转成红外信号的“开”发射出去，就能把空调打开了，射频可以穿墙，红外信号是不能穿墙的，这就能实现远距离控制电器。