Highfrequencycircuit-AMFM

pt100高精度测量电路，精度误差小，速度快，arm9 c51均可实现 ，仅供学习 参考(PT100 high precision measurement circuit, precision error is small, fast, C51 ARM9 can be achieved, only for learning reference )

买的一块开发板的开发文档、原理图还有PCB板，并且附有PCI9054的驱动程序及上位机测试应用程序，调试时需要安装Windriver。(Development board to buy a piece of the development of documents, there are PCB board schematics, and with the PCI9054 PC drivers and test applications, when the need to install debug Windriver.)

该例程演示了接 联合开发网 - pudn.com

AD7783模数转换程序，功能已经过调试运行，简单易懂(AD7783 A/D convert,it is very useful)

说明：  能实现对方波频率进行采集，能够采集低频到100K左右的方波(It can collect square wave frequencies from low frequency to about 100K.)

THIS IS A TEST SYSTEM FOR DIFFERENTIAL PROTECTION IN PSCAD

说明：  键盘控制，keypad_test,Arduino(Keyboard control,keypad_test,Arduino)

说明：  这是一个双极性PWM方式下的单相全桥逆变。(This is a bipolar PWM mode of the single-phase full-bridge inverter.)

按键控制流水灯，使用左移右移控制流水灯闪烁，实在不知道说啥了(Key control water lamp, use left shift right to control the flow of water lamp flashing, really do not know what to say)

说明：  按键控制STM32单片机输出PWN波占空比和频率可调(Key control STM32 MCU output PWN wave duty cycle and frequency adjustable)