DAC5615

direct sparse solver for linear equations

使用51单片机，用其内部定时中断，和外部中断只找一个可控脉宽调制信号PWM(Using 51, with its internal timer interrupt, and external interrupt only to find a controllable pulse width modulation signal PWM)

说明：  HT32F1755单片机基础程序,LCD,延时，定时器等等(HT32F1755 microcontroller-based program, LCD, delay, timers, etc.)

基于msp430单片机的秒表及12864函数，经过149及169验证的(Msp430 microcontroller based function stopwatch and 12864, after 149 and 169 validation)

Pocket 2003 Imager_SDK_14.12.20086 for software engineereing.

该夜用照明灯系统采用AT89S52单片机为核心，利用单片机的端口分别控制LCD1602标准时钟系统、可控硅和电铃，达到智能操控照明系统(The night with the lighting system using AT89S52 microcontroller as the core, using SCM port control the LCD1602 standard clock system, SCR and bells, to the intelligent control lighting system)

STM32单片机freemodbus的移植，主从机的都有(1, transplant FreeModbus1.5 and RT-Thread1.1.1 to STM322, development platform supports Eclipse, Keil, IAR3, can be used in the Eclipse plug-in version management EGIT 4, support Modbus RTU (ASCII untested))

基于低功耗单片机msp430f5438a的spiflash w25q128驱动 读写擦除(Based on low-power microcontroller msp430f5438a of spiflash w25q128 drive to read and write erase)

基于avr单片机，1302芯片实现时钟，单字节读写(avr atmega16 ds1302)

这是一个用51单片机系统仿真ucosii工作的protues电路 本系统包括扩展64k RAM的单片机系统和杨屹移植到51单片机的ucosii 系统 使用方法： 1.安装Protues7.4版，然后用protues打开protues 8051 simulation 文件夹 中的extern ram.DSN 文件 2.打开extern ram.DSN 后，双击单片机在弹出的窗口中的Program File 选项 中选择yy.hex文件。 (yy.hex其实就是yy文件夹中keil文档编译出来的hex文 件，yy文件夹是杨屹的ucos51 系统，用keil 2 可以打开) 3.在Clock Frequency选项中输入22.184M(杨屹的ucos51 用的是22.184M hz的单片机频率) 4.双击VTERM串口调试显示屏，在Baud Rate 选项中选择19200的波特率 5.保存，点击运行就可以看到经典的hello world 了。 (1. Protues7.4 version installed, and then open the protues folder protues 8051 simulation The extern ram.DSN file 2. Open extern ram.DSN, double-click the pop-up window of SCM in the Program File option, select yy.hex file. (yy.hex actually yy folder keil out of the document compiled hex files, yy folder is Yang Yi s ucos51 system, using keil 2 Can open) 3. In the Clock Frequency option to enter 22.184M (Yang Yi of the ucos51 using a microcontroller 22.184M hz frequency) 4. Double-click VTERM serial debug display, in the Baud Rate select 19200 baud rate options 5. Save, click Run you can see the classic hello world)