Gradient LED demo program, it can be extended more LED Gradient Method

ATMEL AT91SAM USB Mass Storage Module

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

SD卡和AIC23数字音频输出实验, FreeDev Audio Dsp Board采用了TI公司的TVL320AIC23 1、控制接口使用I2C，Quartus中将CS置低（器件地址0011010）。 2、数字音频接口使用了组件FreeDev_aic23,有三种测试和应用 模式，中断结合DMA方式能在NIOS II中采集和发送数据。中断信号 产生于模块中FIFO缓冲区的半满信号，读取数据端口自动清除中断 请求信号。 3、I2C IP 和FreeDev_aic23 IP分别在Quartus 工程目录中 4、SD卡读写通过SD_DAT0、SD_CLK、SD_CMD三个PIO信号线用软件 控制时序。 5、该范例读SD卡数据，通过DMA将Buffer数据送到FreeDev_aic23的 FIFO中实现数据播放。 6、SD卡中的数据必须是以48K*16bit保存的采样数据。数据可以通过SD读卡器写入。

电能计量芯片SA9904的读写程序，用的是SPI方式，IAR MAP430开发环境！-SA9904 chip energy metering reading and writing process, using the SPI mode, IAR MAP430 development environment!

公开源代码的嵌入式操作系统r&s!建议学习！-An open source embeded OS- r&S. Recommended to study!

IAR 环境 LPC2478 的串口程序-IAR environment, LPC2478 serial program

it is usb based power switch controlled via usb based on avr microcontroller

ecos 操作系统参考手册。内容比较全。希望有用。-ecos refer manual.

基于8051单片机的nrf905发送/接收c程序-8051 based on the nrf905 Send/Receive c procedures

基于ATMEGA16的DA转换的C程序源代码，拿过来就 用-Based on ATmega16 the DA conversion process C source code, get back on the use