cstartup

pwm 源程序代码 可以用于电源或是电机控制 经过修改(PWM source code can be used for power supply or a motor control modification)

基于stm32，实现4*4按键。文件中.c和.h文件可直接添加到自己的项目中(Based on STM32 development, 4*4 matrix key is realized. The. C and. h keys can be added directly to the kile framework.)

单片机MC9S08AW60脉宽调制 TPM1CH3 LS2亮度控制 KBI SEG控制亮度等级 。本工程为定时器输出PWM波测试工程实例通过对PWM占空比的调节,实现小灯的渐亮的功能,当占空比为100％时再从0％逐渐增加.PWM的周期一定要足够的快,否则其输出电压的波动范围很大,且测不出一个稳定的电压值,这样通过就观察不到小灯渐亮效果. 另外,在改变PWM的周期和占空比之前和之后要分别禁止和使用。(MC9S08AW60 pulse width modulation TPM1CH3 LS2 brightness control KBI SEG brightness level. This project is an example of testing the output PWM wave of the timer. By adjusting the duty ratio of the PWM, the function of the small lamp gradually brightening is realized. When the duty ratio is 100%, the period of the small lamp gradually increases from 0%. The period of the PWM must be fast enough. Otherwise, the fluctuation range of the output voltage is large and a stable voltage value can not be measured, so the effect of the gradual brightening of the small lamp can not be observed. In addition, the period of the PWM is changed. Before and after duty cycle should be prohibited and used separately.)

ALIENTEK MINISTM32 实验17 SPI实验(The ALIENTEK MINISTM32 experiment 17 SPI experiments)

介绍如何简单可靠而方便测量 4～20mA 信号的文章。许多仪器仪表在远距离传送信号时，都有可能采取 4～20mA 的方式进行传送。本文对使用运算放大器或者不用运算放大器的场合都有介绍。给出了接口电阻的计算方法以及调整4mA＝零点，20mA＝满度的详细说明。并附有局部连接的原理图。(How simple, reliable and convenient measurement of 4 ~ 20mA signal article. Many instruments in the long-distance signal transmission, may take 4 ~ 20mA way transmission. In this paper, an operational amplifier or op amp do not have a description occasions. Shows the calculation of the interface resistance and adjust the 4mA = zero, 20mA = full scale details. Local connections together with the schematic.)

说明：  电力系统继电保护原理（第三版）-天津大学.pdf 电子书籍。(Power System Protection Principles (third edition)- Tianjin University. Pdf e-books.)

实现数码管0-7的静态显示，采用c语言编写。(play led)

铸造过程中温度场的描述的仿真模拟，可以写到文件中(Casting process described temperature field can be written to a file)

单片机ad转换，将采集的模拟信号转换成数字信号(Single-chip ad conversion, the analog signal will be collected into a digital signal)

增强型单片机c8051f230与2.4G射频芯片所组成的无线通信系统，通过串口进行无线通信。文件内为汇编源程序。(C8051f230 with enhanced single-chip 2.4G RF chip which consists of wireless communication systems, through the serial port for wireless communications. Source file for compilation.)