实验箱上的蜂鸣器发出对应的音调（中音），当同时按下L和1

Samsung 2440 sample keypad example in C

步进电机驱动程序msp430f247单片机-Stepper motor driver msp430f247 Singlechip

DMA例程，51单片机读写DMA的C语言程序和汇编程序-DMA routines, 51 single-chip DMA read and write C-language programming and assembler

快速付里叶变换子程序所需 RAM 空间以输入的首地址为基址,向增加的方向扩展-Fast Fourier Transform subroutine RAM space required to input the first address of the site was to increase the direction of expansion

LCD全方位应用超强功能,温度,篮球计算器,密码锁等-LCD all-round application of super-function, temperature, basketball calculator, password lock, etc.

* 功能：使用PWM6输出PWM信号，通过滤波电实现DAC转换。由KEY1控制PWM的占空比， * 每按一次按键将会改变一次PWM的占空比。 * 说明：使用示波器观察测试点PWM和PWMDAC。-* Function: Use PWM6 output PWM signal, by filtering electrical realize DAC conversion. Key1 controlled by the PWM duty cycle,* every time a button will change the PWM duty cycle.* Note: Use the oscilloscope to observe test points PWM and PWMDAC.

upsd3300_I2C.c upsd3300_lcd.c 等等几个实用的程序代码-upsd3300_I2C.c upsd3300_lcd.c so on several practical way Order code

一个简单实用的单片机键盘扫描程序。键盘为4*4扫描的键盘，通过行列扫描进行键码判断，并通过串行口或者485信号输出键码。应用于银行系统。-A simple and practical single-chip microcomputer keyboard scanner. 4* 4 keyboard for keyboard scanning, scan through the ranks to determine the key code and, through the serial port or a key code signal output 485. Applies to the banking system.

带有24C02的红外数据接收程序，24C02是用I2C写的，接收端口为P3-2-24C02 with the infrared data reception procedures, I2C 24C02 is written in the port to receive P3-2

电机调速是单片机或DSP硬件平台结合电机运行机制设计相应算法，并以软件实现-Motor speed is a microcontroller or DSP hardware platforms, operating mechanism with electrical design corresponding algorithms, and to software implementation