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。
上传时间: 2013-12-09
上传用户:aix008
ADV7181B视频解码设置和控制实验 FreeDev Digital Application Board采用了ADI公司的 ADV7181B视频解码芯片。控制接口使用I2C,40H--write,41H---read。
标签: 7181B 7181 Application ADV
上传时间: 2015-12-14
上传用户:风之骄子
Vista rally 技术之 LLTD的spec 十分有用的东东
上传时间: 2014-01-22
上传用户:qilin
Vista rally技术之pnp-x的spec 是upnp的扩展 很有用的拉
上传时间: 2013-12-02
上传用户:李彦东
这是支持华横开发板board源代码,希望有需要的可以参考
上传时间: 2015-12-19
上传用户:caiiicc
FAT:General Overview of On-Disk Format,适合MP3和U盘和存储宝开发人员使用的存储格式结析文件
标签: Overview General On-Disk Format
上传时间: 2013-12-24
上传用户:mpquest
smdk2410 cpld code s3c2410 demo board cpld code
上传时间: 2015-12-25
上传用户:moshushi0009
SD 物理层 spec 翻译 说明,主要是用SD BUS总线。
上传时间: 2015-12-27
上传用户:ljmwh2000
This directory contains a code example that demonstrates the functionality of the general purpose timers on the ADSP-BF561 EZ-KIT,用VDSP++打开
标签: functionality demonstrates directory the
上传时间: 2015-12-29
上传用户:徐孺
Carrier-phase synchronization can be approached in a general manner by estimating the multiplicative distortion (MD) to which a baseband received signal in an RF or coherent optical transmission system is subjected. This paper presents a unified modeling and estimation of the MD in finite-alphabet digital communication systems. A simple form of MD is the camer phase exp GO) which has to be estimated and compensated for in a coherent receiver. A more general case with fading must, however, allow for amplitude as well as phase variations of the MD. We assume a state-variable model for the MD and generally obtain a nonlinear estimation problem with additional randomly-varying system parameters such as received signal power, frequency offset, and Doppler spread. An extended Kalman filter is then applied as a near-optimal solution to the adaptive MD and channel parameter estimation problem. Examples are given to show the use and some advantages of this scheme.
标签: synchronization Carrier-phase multiplicativ approached
上传时间: 2013-11-28
上传用户:windwolf2000