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很强的射频卡reader源代码，支持ISO14443A、ISO14443B等卡片，支持Mifare卡，desfire 4卡，内嵌入3DES算法(A strong source of RF card reader, support ISO14443A, ISO14443B such as card, Mifare card support, desfire 4 cards, embedded 3DES algorithm)

应用51单片机控制蜂鸣器产生不同的频率，而形成曲调。(Application of 51 single chip microcomputer control buzzer to generate different frequencies, and the formation of the tunes.)

说明：  单片机c8051f120使用DAC生成正弦和余弦波形例程，内带说明(SCM c8051f120 generated using the sine and cosine waveform DAC routines, which take note)

可以用的飞思卡尔智能车测试程序，非常不错的(Freescale smart car test procedures can be used, very good)

STM32F103共享电平车无线终端源代码(STM32F103 source code for shared motor,electric bike.)

The sliding DFT is a spectral analysis method based on the classical FFT, implemented over a subset of the N center frequencies of the N-point DFT. The sliding DFT (SDFT) algorithm performs an N-point DFT on time samples within a sliding-window.

适用MINI板的基础例程 STM32奋斗板2M U盘-mini(Basic routines applicable to MINI boards)

Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.

8通道12位AD采集芯片LTC2309的IIC应用(LTC2309: 8-channel, 12-Bit SAR ADC with I2C interface)

1.具有环境信息采集功能，可以采集环境的温度、湿度和光照强度。 2.具有联网功能，可以将采集到的环境信息直接上传到Yeelink云平台上。 3.具有网络查看功能，可以用任何联网设备，在互联网上查看采集点的信息。(1 with environmental information collection function, you can collect temperature, humidity and light intensity environment. 2 with networking capabilities, you can collect environmental information directly uploaded to Yeelink cloud platform. 3 has a network view feature, you can use any networked device, view the information collection point on the Internet.)