8X8 LED矩阵接口使用74HC595

英培特s3c2410开发板功能模块usb源码-British培特S3C2410 development board function module usb-source

用c51可实现0~99小时倒计时，并判断时间到系统自动断电功能！-C51 can be realized with 0 ~ 99 hours countdown, and determine time to automatically power-off function

介绍一款指纹采集芯片在嵌入式linux中的源代码.包括指纹处理及使用-Introduce a fingerprint chip embedded in the source code of linux. Including the treatment and the use of fingerprints

CPLD/FPGA设计中的时钟应用讲解 及其实例-CPLD/FPGA design applications on the clock and its examples

开发SD卡的必备资料,希望大家喜欢--Useful materials for developing SD card.

应用背景STM32 STM32 开发板自带了一颗非常强劲的MP3解码芯 片，利用该芯片我们可以实现 MP3/OGG/WMA/WAV/FLAC/AAC/MIDI等各种音频 文件的播放。关键技术本章实验功能简介：开机先检测字库是否存在，如果检测无问题，则对VS1053进行RAM测试和正弦测试，测试完后开始循环播放SD卡MUSIC文件夹里面的歌曲（必须在SD卡根目录建立一个MUSIC文件夹，并存放歌曲在里面），在TFTLCD上显示歌曲名字、播放时间、歌曲总时间、歌曲总数目、当前歌曲的编号等信息。KEY0用于选择下一曲，KEY2用于选择上一曲，WK_UP和KEY1用来调节音量。DS0还是用于指示程序运行状态，DS1用于指示VS1053正在初始化。

用ISD1700来实现读温度，比如27.5摄氏度，先分段录制声音：1,2,3,4,5,6,7,8,9,十，点，温度，摄氏度。读27.5摄氏度时，再分段找地址，读出相应的数-Reading used to achieve ISD1700 temperature, such as 27.5 degrees Celsius, the first sub-recording the voices of: 1,2,3,4,5,6,7,8,9, ten, point, temperature, degrees Celsius. Reading of 27.5 degrees Celsius, then find a sub-address, read out the corresponding number of

本程序为实验板的总体测试程序，综合测试了整个实验板上的绝大多数功能,下载程序后会依次看到以下5种状态。 1.8个流水灯先会从上到下流动一遍，同时蜂鸣器发声。 2.接着DAC电流指示灯由暗变亮 3.接着前三位数码管显示温度值 4.接着AD数值显示在数码管的前三位 5.接着等待矩阵键盘的按下，按下后相应的数码显示在数码管的后三位上-This procedure for the experiment board" s overall test program, a comprehensive test of the vast majority of the entire experiment on-board features, download the program will in turn see the following five kinds of states. 1.8 water lights will first flow from top to bottom again, at the same time buzzer sound. 2. And then DAC current indicator light changes from the dark 3. And then the top three LED display temperature 4. And then AD values displayed in the top three digital tube 5. And then wait for the keyboard matrix is pressed, press the corresponding post- digital display in the digital control on the latter three

iNDUCTION MOTOR CONTROL STRATERGIES

excel_用C操作_包含读,写,删.简单的调用实例.. excel_用C操作_包含读,写,删.简单的调用实例.. excel_用C操作_包含读,写,删.简单的调用实例..