GPIO

模仿粒子运动的高质量随机数发生器，取粒子坐标得到随机数，附带测试结果图片(Mimic the particle motion of high-quality random number generator, taking the number of particle coordinates to be random, with test results picture)

键盘扫描码，键盘上所有按钮都有，全是我做实验是出来的。注意，可不是ASCII码，是扫描码(ASCII scan code)

说明：  ，用来控制带i2c的风扇板及读写e2prom都没问题，但是用来进行两个AVR单片机之间的通信时，有时会出现数据发送和接收错误（单片机AT1281的TWI引脚连接到i2c缓冲器PCA9513上，通信是在ATCA六槽机箱中进行，但是只用了两个槽位，其他的悬空(That is used to control with the i2c fan board and literacy e2prom all right, but used for two AVR of communication between the microcontroller, can appear sometimes sending and receiving data error (SCM AT1281 of TWI pin connected to the i2c buffer PCA9513, communication is in ATCA six slot chassis, but only two slots, other suspended)

高精度电压表(24bit) VB源程序,简单修改可实现多量程(precision voltage (24bit) VB program, a simple change can be realized more range)

说明：  - 0 = Channel 0 minus channel 1

msp430f5438系统中文资料(全)(msp430f5438system_Chinese Materials)

在51开发板上，向AT24C02 EEPROM中写入0x(xx),同时读出之后赋值给P1口。注意三处加*********(In the 51 development board， write 0x (xx)to AT24C02 EEPROM , while after reading assigned to P1 port. Note that three plus。)

三角波、锯齿波、正弦波、方波信号产生器，易于移植(The triangle wave, sawtooth, sine wave signal generator, Fang Bo, easy to transplant)

说明：  More testing with arduino for cs1180 and 485 micro.

通过RS485端口不停地发送数据0xaa用示波器观察RS485端口A、B信号线上的波形或者用RS485接收器接收发送的字符。(Through the RS485 port to send data continuously 0xaa observed with an oscilloscope RS485 ports A, B signal waveforms or use the RS485 line receiver sends characters.)