The TAS3204 is a highly-integrated audio system-on-chip (SOC) consisting of a fully-programmable, 48-bit digital audio processor, a 3:1 stereo analog input MUX, four ADCs, four DACs, and other analog functionality. The TAS3204 is programmable with the graphical PurePath Studio™ suite of DSP code development software. PurePath Studio is a highly intuitive, drag-and-drop environment that minimizes software development effort while allowing the end user to utilize the power and flexibility of the TAS3204’s digital audio processing core. TAS3204 processing capability includes speaker equalization and crossover, volume/bass/treble control, signal mixing/MUXing/splitting, delay compensation, dynamic range compression, and many other basic audio functions. Audio functions such as matrix decoding, stereo widening, surround sound virtualization and psychoacoustic bass boost are also available with either third-party or TI royalty-free algorithms. The TAS3204 contains a custom-designed, fully-programmable 135-MHz, 48-bit digital audio processor. A 76-bit accumulator ensures that the high precision necessary for quality digital audio is maintained during arithmetic operations. Four differential 102 dB DNR ADCs and four differential 105 dB DNR DACs ensure that high quality audio is maintained through the whole signal chain as well as increasing robustness against noise sources such as TDMA interference. The TAS3204 is composed of eight functional blocks: Clocking System Digital Audio Interface Analog Audio Interface Power supply Clocks, digital PLL I2C control interface 8051 MCUcontroller Audio DSP – digital audio processing 特性 Digital Audio Processor Fully Programmable With the Graphical, Drag-and-Drop PurePath Studio™ Software Development Environment 135-MHz Operation 48-Bit Data Path With 76-Bit Accumulator Hardware Single-Cycle Multiplier (28 × 48)
上传时间： 2016-05-06
上传用户：fagong
Abstract—In the future communication applications, users may obtain their messages that have different importance levels distributively from several available sources, such as distributed storage or even devices belonging to other users. This scenario is the best modeled by the multilevel diversity coding systems (MDCS). To achieve perfect (information-theoretic) secrecy against wiretap channels, this paper investigates the fundamental limits on the secure rate region of the asymmetric MDCS (AMDCS), which include the symmetric case as a special case. Threshold perfect secrecy is added to the AMDCS model. The eavesdropper may have access to any one but not more than one subset of the channels but know nothing about the sources, as long as the size of the subset is not above the security level. The question of whether superposition (source separation) coding is optimal for such an AMDCS with threshold perfect secrecy is answered. A class of secure AMDCS (S-AMDCS) with an arbitrary number of encoders is solved, and it is shown that linear codes are optimal for this class of instances. However, in contrast with the secure symmetric MDCS, superposition is shown to be not optimal for S-AMDCS in general. In addition, necessary conditions on the existence of a secrecy key are determined as a design guideline.
标签： Fundamental Limits Secure Class on of
上传时间： 2020-01-04
上传用户：kddlas
在半导体制冷技术的工作性能及其优缺点研究的基础上,设计了以单片机为核心控制元件,以TEC1-12706为执行元件的半导体制冷温度控制系统。采用高精度分段式PID控制算法配合PWM输出控制的方法实现温度控制;选择数字传感器DS18B20为温度检测元件,还包含1602液晶显示模块、按键调整输入模块和H桥驱动模块等。实际测试表明,该系统结构简单易行,操作方便,工作性能优良,同时针对该系统专门设计的温控算法,使半导体制冷器能更好地适应不同工况而充分发挥其制冷制热工作特性。Based on the study of the performance and advantages and disadvantages of thermoelectric cooler(TEC)technology,a thermoelectric cooling temperature control system with single-chip microcomputer as the core control element and TEC1-12706 as the executive element was designed. High precision piecewise PID control algorithm combined with PWM output control method is adopted to realize temperature control. The digital sensor DS18B20 is selected as the temperature detection element. It also includes 1602 LCD module,key adjustment input module and H bridge drive module. The actual test shows that the system has simple structure,convenient operation and excellent performance. Meanwhile,the temperature control algorithm specially designed for the system can make the semiconductor cooler better adapt to different working conditions and give full play to its refrigeration and heating characteristics.
上传时间： 2022-03-27
上传用户：
本系统基于STM32单片机设计的非接触式电流检测控制系统,通过OPA548片将所给任意信号放大,由100Ω电阻和INA128芯片进行电流电压转换放大后,利用STM32单片机对获取的电压信号以0.488μs频率采样,利用STM32单片机的FFT库,获得信号的谐波信息。测量电流信号精准,该设计可广泛应用在以STM32单片机为核心控制器件的新型仪表中,性能精准且抗干扰能力强。This system is a non-contact current detection and control system based on STM32 single chip microcomputer. It amplifiesany signal through OPA548 chip, converts and amplifies the current and voltage by 100 Ω resistance and INA128 chip. The obtainedvoltage signal is sampled at the frequency of 0.488 μs by STM 32 single chip microcomputer, and the harmonic information of the signalis obtained by the FFT library of STM 32 single chip microcomputer. The measurement of current signal is accurate. This design can bewidely used in a new instrument with STM 32 single chip microcomputer as its core control device, with accurate performance and stronganti-interference capability.
上传时间： 2022-03-27
上传用户：
VIP专区-嵌入式/单片机编程源码精选合集系列（86）资源包含以下内容：1. 4*4键盘扫描程序,程序简单明了,注释清晰易懂 !.2. 1、程序目的：AT91SAM7A3的CAN功能验证与使用指导。 2、功能说明：该程序包括三个常用CAN功能的测试 1）、测试1:将CAN0 Mailbox 0中的数据传到CAN1 Mailbox.3. ISD25120语音电路程序.4. 包含2个文件包 1.基于LPC213X的SD卡SPI口读写模块 2. uCOS-II在LPC2000上的移植代码.5. cc2420-A True System-on-Chip solution for 2.4 GHz IEEE 802.15.4 / ZigB.6. MSP430FG4619对LCD进行显示的完整工程源文件包,对MSP430和LCD显示具有参考价值.7. Matlab_simulink在FPGA设计中的应用.8. vhd语言.9. NiosII的范例.10. apache 安装教程 apache 安装教程.11. 凌阳7300 原理图 凌阳7300 原理图.12. C51弹片机简单计算器.13. 循环日志读写,用于嵌入式系统记载日志文件.14. RC500 source code!.15. C++编写的日历程序.16. 日历加判断第几周,请输入一个日期.17. 请输入一个日期.18. epson mcu 启动代码与动画实现.19. 2262 lcm abcdefghijkl.20. 在EASYARM实验平台上的数字/模拟转换测试代码.21. EASYARM2200上图形液晶显示代码.22. 基于ARM处理器的SMG240128A驱动程序.23. NiosII下UCOS和移植Linux教程,很难找到的资料.24. NIosII软处理器快速入门,ALTERA FPGA的NIOSII入门指导.25. SPI 4线接口spec,对硬件和驱动有兴趣的朋友可以下载.26. 在VS2005下写的把SQLCE上的数据库数据导出为XML的应用程序.27. 这是一个关于用C语言编程时要在液晶显示器上显示汉字时需要用到的汉字字库。.28. 一个关于交通灯控制实验的原理图和程序以及详细说明.29. 此源代码是基于UCOSII 以S3c44b0xARM7为主控芯片的系统。可以显示世界各时区的时钟.30. 四轴控制电机驱动的源程序,在编译环境中已通过.31. 一个基于ZigBee技术的无线传感器网络平台.32. 5按键_SD卡MP3程序.33. ADS下开发LED的一个简单例子.34. 一种基于CPLD和PC I总线的视频采集卡的设计方案.35. arm7最小系统的编程原码,具有与上位机通讯协议,能同时控制10个开关量与三个模拟量及三个脉冲量..36. 320*240液晶屏程序.37. ARM7 S3C44B0X开发板官方原理图.38. ARM9 S3C2410外接用TFT液晶显示模块原理图.39. VGA的IP核.40. ISP1362的IP核.
上传时间： 2013-06-08
上传用户：eeworm
信号与信息处理是信息科学中近几年来发展最为迅速的学科之一,随着片上系统(SOC,System On Chip)时代的到来,FPGA正处于革命性数字信号处理的前沿。基于FPGA的设计可以在系统可再编程及在系统调试,具有吞吐量高,能够更好地防止授权复制、元器件和开发成本进一步降低、开发时间也大大缩短等优点。然而,FPGA器件是基于SRAM结构的编程工艺,掉电后编程信息立即丢失,每次加电时,配置数据都必须重新下载,并且器件支持多种配置方式,所以研究FPGA器件的配置方案在FPGA系统设计中具有极其重要的价值,这也给用于可编程逻辑器件编程的配置接口电路和实验开发设备提出了更高的要求。 本论文基于IEEE1149.1标准和USB2.0技术,完成了FPGA配置接口电路及实验开发板的设计与实现。作者在充分理解IEEE1149.1标准和USB技术原理的基础上,针对Altcra公司专用的USB数据配置电缆USB-Blaster,对其内部工作原理及工作时序进行测试与详细分析,完成了基于USB配置接口的FPGA芯片开发实验电路的完整软硬件设计及功能时序仿真。作者最后进行了软硬件调试,完成测试与验证,实现了对Altera系列PLD的配置功能及实验开发板的功能。 本文讨论的USB下载接口电路被验证能在Altera的QuartusII开发环境下直接使用,无须在主机端另行设计通信软件,其兼容性较现有设计有所提高。由于PLD(Programmable Logic Device)厂商对其知识产权严格保密,使得基于USB接口的配置电路应用受到很大限制,同时也加大了自行对其进行开发设计的难度。 与传统的基于PC并口的下载接口电路相比,本设计的基于USB下载接口电路及FPGA实验开发板具有更高的编程下载速率、支持热插拔、体积小、便于携带、降低对PC硬件伤害,且具备其它下载接口电路不具备的SignalTapII嵌入式逻辑分析仪和调试NiosII嵌入式软核处理器等明显优势。从成本来看,本设计的USB配置接口电路及FPGA实验开发板与其同类产品相比有较强的竞争力。
上传时间： 2013-04-24
上传用户：lingduhanya
如今IC设计进入了SOC(System-on-chip)设计时代。SOC是指在单一芯片上集成了微控制器、数字信号处理器、存储器、I/O接口等，可以实现信号采集、转换、存储、处理等功能的芯片。SOC设计是基于IP可重用性的设计过程。现在已有不少公司成功地开发了各种SOC总线规范，以便于IP核的可复用性设计。其中，ARM公司开发的AMBA(Advanced Microcontroller Bus Arehitecture)规范已经成为嵌入式应用的行业标准。嵌入式SOC芯片广泛应用于消费电子产品中，近年来随着彩屏手机、PDA等移动终端的普及，液晶电视等平板显示器件的推广，液晶显示器已经逐渐取代CRT成为主流的显示器件。LCD Driver IC作为液晶显示器的重要部件，需求量也日益增大。嵌入式液晶显示系统的设计是当今SOC设计中不可缺少的部分，而基于AMBA总线规范的LCD显示系统更是具备良好的性能和较大的潜力。 本文提出了一种基于AMBA总线规范的彩色TFT-LCD数字图像显示解决方案，硬件设计上包括APB存储接口模块、LCD控制模块，并用VHDL硬件描述语言进行了功能仿真，采用Mentor公司Modelsim5.8完成了系统功能验证；软件设计上完成了基于SAMSUNG公司S6D0110 TFT-LCD驱动芯片的测试程序的编写和系统测试。本设计不需要掌握TFT-LCD内部构造，复杂的内部驱动原理，只需要掌握AMBA总线规范和LCD的MPU并行接口时序，采用本课题设计出的LCD显示控制模块简单实用，便于推广应用。 本课题基于Xilinx公司的VirtexⅡ FF1152 PROTO开发平台完成了软件调试，实现了TFT-LCD图像显示。调试结果表明硬件和软件设计正确且取得了较为满意的结果。
上传时间： 2013-06-02
上传用户：小枫残月
信号与信息处理是信息科学中近几年来发展最为迅速的学科之一,随着片上系统(SOC,System On Chip)时代的到来,FPGA正处于革命性数字信号处理的前沿。基于FPGA的设计可以在系统可再编程及在系统调试,具有吞吐量高,能够更好地防止授权复制、元器件和开发成本进一步降低、开发时间也大大缩短等优点。然而,FPGA器件是基于SRAM结构的编程工艺,掉电后编程信息立即丢失,每次加电时,配置数据都必须重新下载,并且器件支持多种配置方式,所以研究FPGA器件的配置方案在FPGA系统设计中具有极其重要的价值,这也给用于可编程逻辑器件编程的配置接口电路和实验开发设备提出了更高的要求。 本论文基于IEEE1149.1标准和USB2.0技术,完成了FPGA配置接口电路及实验开发板的设计与实现。作者在充分理解IEEE1149.1标准和USB技术原理的基础上,针对Altcra公司专用的USB数据配置电缆USB-Blaster,对其内部工作原理及工作时序进行测试与详细分析,完成了基于USB配置接口的FPGA芯片开发实验电路的完整软硬件设计及功能时序仿真。作者最后进行了软硬件调试,完成测试与验证,实现了对Altera系列PLD的配置功能及实验开发板的功能。 本文讨论的USB下载接口电路被验证能在Altera的QuartusII开发环境下直接使用,无须在主机端另行设计通信软件,其兼容性较现有设计有所提高。由于PLD(Programmable Logic Device)厂商对其知识产权严格保密,使得基于USB接口的配置电路应用受到很大限制,同时也加大了自行对其进行开发设计的难度。 与传统的基于PC并口的下载接口电路相比,本设计的基于USB下载接口电路及FPGA实验开发板具有更高的编程下载速率、支持热插拔、体积小、便于携带、降低对PC硬件伤害,且具备其它下载接口电路不具备的SignalTapII嵌入式逻辑分析仪和调试NiosII嵌入式软核处理器等明显优势。从成本来看,本设计的USB配置接口电路及FPGA实验开发板与其同类产品相比有较强的竞争力。
上传时间： 2013-06-07
上传用户：2525775
A complete design for a data acquisition card for the IBM PC is detailed in this application note. Additionally, C language code is provided to allow sampling of data at speed of more than 20kHz. The speed limitation is strictly based on the execution speed of the "C" data acquisition loop. A "Turbo" XT can acquire data at speeds greater than 20kHz. Machines with 80286 and 80386 processors can go faster than 20kHz. The computer that was used as a test bed in this application was an XT running at 4.77MHz and therefore all system timing and acquisition time measurements are based on a 4.77MHz clock speed.
上传时间： 2013-10-29
上传用户：BOBOniu
数字控制的交流调速系统所选用的微处理器、功率器件及产生PWM波的方法是影响交流调速系统性能好坏的直接因素。在介绍了正弦脉宽调制(SPWM)技术的基础上，设计了一种以8098单片机作为控制器，以智能功率模块IPM为开关器件的变频调速系统。通过软件编程，产生正弦脉冲宽度调制波形来控制绝缘栅双极晶体管的导通和关断，从而达到控制异步电动机转速的目的。实验结果表明，该系统可调频率调电压，稳定度高，调速范围宽，具有较强的实用价值 Abstract: AC variable speed with digital control systems used microprocessors， power devices and generate PWM wave is the direct factors of affecting the performance AC speed regulation system. On the basis of introducing the sinusoidal pulse width modulation (SPWM) technology，this paper designed variable speed system which used 8098 as a controller， intelligent power module IPM as switching device. Through software programming， resulting in sinusoidal pulse width modulation waveform to control the insulated gate bipolar transistor turn on and off， so as to achieve the purpose of speed control of induction motors. Experimental results show that the system can adjust frequency modulation voltage， high stability， wide speed range， has a strong practical value.
上传时间： 2013-11-14
上传用户：ynwbosss
