KEY3

uclinux中文参考手册，对学习uclinux很有帮助，是全中文的参考手册(Basis Chinese reference manual, to learn Basis helpful, is the Chinese reference manual)

基于stm32 和8591，利用i2c实现DA(Based on stm32 and 8591, the use i2c achieve DA)

时间间隔测量芯片tdc-gp22与STM32应用程序(STM32 μC Sample code of Application Note)

说明：  AT17C256的I2C读写源程序，可实现一系列I2C的读写，ARM平台下此EEPROM的驱动(AT17C256 I2C literacy source, the realization of a series of I2C reader, ARM platform drive this EEPROM)

稀里糊涂学stm32系列，第五讲内容，相对于手册，学习起来更容易上手，暂时只有6讲，均上传。 (Sleepwalk learn stm32 series, talk about content, relative to the manual, learning is easier to get started, for the time being only 6 speak, are uploaded. )

JXARM9-2410 数模转换实验主程序， 实现功能：，实现JXRAM9-2410与PC机的串口通讯，JXARM9-2410 UART0 <==> PC COM (JXARM9-2410 digital-to-analog conversion experiments the main program, the realization of functions: to achieve JXRAM9-2410 and PC-Serial communication, JXARM9-2410 UART0 )

说明：  专门针对周立功Smart2200开发板的引导程序。(Specifically for weeks Smart2200 Ligong development board of the boot.)

该嵌入式C语言源代码软件工程是以STM32F103系列微控制器为核心的嵌入式数字示波器的源代码工程，主要实现0V基线对齐、探头补偿校准、波形保存和调出等功能，具有带宽0-200KHZ、垂直灵敏度10mv/div-5v/div、记录长度1024点、触发方式自动/常规/单次等参数。(The embedded C language source code software engineering is based on STM32F103 series microcontrollers as the core of the embedded digital oscilloscope source code project, the main realization of 0V baseline alignment, probe compensation calibration, waveform preservation and recall functions, with bandwidth 0- 200KHZ, vertical sensitivity 10mv / div-5v / div, record length 1024 points, trigger mode automatic / conventional / single and other parameters.)

说明：  系统中采用了电压反馈闭环，单片机通过内部软件产生一路SPWM控制信号，然后经过逻辑门变换电路变换成逆变全桥所需的四路驱动信号，再经专用驱动芯片TLP250隔离放大后，分别加到逆变全桥四个IGBT的栅极，进行驱动控制。(The voltage feedback closed loop is used in the system, and the single chip microcomputer generates all the SPWM control signal through the internal software, then transforms the four-way drive signal required by the logic gate transformation circuit into the inverter full bridge, and then adds to the gate of four IGBT of the inverter full bridge after the special drive chip TLP250 isolation and amplification, and carries on the drive control.)

W681512，华邦电子的语音编码芯片，在实际测试和使用中表现很出色。(W681512, Winbond speech coding chip, in the actual testing and use is remarkable. )