量測/測試所面臨之問題 此測試驗證上,要使用NI公司之LAB VIEW及DAQ CARD來取代AUDIO PRECISION及其所附軟體ATS。首先需克服硬體解析度上的差異,再來是FFT(FAST FOURIER TRANSFORM,快速傳立業轉換)演算未予的撰寫,這將會影響MULTI-TONE訊號上PEAK值的偵測。另外,以RS-232為I/O介面,并呼叫客戶所提供之DLL檔來與DUT內的IC溝通,但因LAB VIEW無法直接呼叫其STRUCTURE,故需用VC++再編譯一層新的DLL來供LAB VIEW使用。
上傳時間: 2013-12-13
上傳用戶:longlong12345678
MMC/SD卡以其優越的性能,在單片機嵌入式設備中得到廣泛應用。將MMC/SD卡作為外部掉電存儲介質應用于音頻信號發生器中,通過8051F330單片機上的SPI接口,實現單片機—MMC/SD卡的存儲擴展,設計了此硬件平臺上的MMC/SD卡的單片機驅動程序,并給出了相應的程序代碼,滿足音頻信號發生器的大容量存儲要求。 Abstract: MMC/SD card is more and more widely used in the single chip embedded devices for their excellent performances.This article introduces the application of MMC/SD card as the external power down storage medium in AUDIO signal generator. The extension technology especially for storage of single chip-MMC/SD card via SPI interfaces in 8051F330 single chip, including designs single chip drive program of MMC/SD card based on hardware platform,and also gives the key coding of the program. The implementation of big capacity storage is meaningful in AUDIO signal generator.
上傳時間: 2014-12-27
上傳用戶:黃華強
利用AT89C51型單片機定時和中斷功能,配以LM386型音頻功率放大器,構成了作息號音自動播放器,為學校和機關管理提供方便。 Abstract: Using timing and interrupt function of the AT89C51 single-chip microcomputer and the LM386 AUDIO power amplifier.It is constituted the automatic bugle player.This player facilitates the institution and the school daily management.
上傳時間: 2013-10-10
上傳用戶:wivai
基于單片機的汽車多功能報警系統設計The Design of Automobile Multi-function AlarmingBased on Single Chip Computer劉法治趙明富寧睡達(河 南 科 技 學 院 ,新 鄉 453 00 3)摘要介紹了一種基于單片機控制的汽車多功能報警系統,它能對汽車的潤滑系統油壓、制動系統氣壓、冷卻系統溫度、輪胎欠壓及防盜進行自動檢測,并在發現異常情況時,發出聲光報警。闡述了該報警系統的硬件組成及軟件設計方法。關鍵詞單片機傳感器數模轉換報警Abstract Am ulti-fimctiona utomobilea larnungs ystemb asedo ns inglec hipc omputerco ntorlis in torducedin th isp aper.Th eo ilpr essuero flu bricatesystem, air pressure of braking system, temperature of cooling system, under pressure of tyre and guard against theft, detected automaticaly場thesystem. AUDIO and visual alarms wil be provided under abnormal conditions廠The hardware composition and software design of the system, described.Keywords Singlec hipc omputer Sensor Digital-t-oanaloguec onversion Alarmin 汽車多功能報苦器硬件系統設計根據 系 統 實際需要和產品性價比,選用ATMEL公司新生產的采用CMOs工藝的低功耗、高性能8位單片機AT89S52作為系統的控制器。AT89S52的片內有8k Bytes LSP Flash閃爍存儲器,可進行100(〕次寫、擦除操作;256Bytes內部數據存儲器(RAM);3 2 根可編程輸N輸出線;2個可編程全雙工串行通道;看門狗(WTD)電路等。系統由傳感器、單片機、模數轉換器、無線信號發射電路、指示燈驅動電路、聲光報警驅動電KD一9563,發出三聲二閃光。并觸發一個高電平,驅動無線信號發射電路。
上傳時間: 2013-11-09
上傳用戶:gxmm
基于ADSP-BF561的數字攝像系統設計Design of Digital Video Camera System Based on Digital Signal ProcessorADSP-BF561(浙江大學 信息與通信工程研究所,浙江 杭州 310027) 馬海杰, 劉云海摘要:介紹了基于ADI雙核的數字信號處理芯片ADSP-BF561 的數字攝像系統實現方案。系統包括硬件和軟件兩部分,硬件主要有ADSP-BF561及其外圍電路、音視頻模數/數模轉換、CF卡/微硬盤接口等部分。軟件主要有操作系統及音視頻編解碼算法等部分。關鍵詞:ADSP-BF561 ;數字攝像機;微硬盤;MPEG-4;A/D;D/A中圖分類號:TN948.41文獻標識碼:AAbstract: An implementation of digital video camera system based on ADI dual core digital signal processor ADSP-BF561 is introduced. The system can be divided into two parts——hardware and software design. The hardware design includes ADSP-BF561 and perpheral apparatus, A/D,D/A, CF card or Microdrive and so on. The software includes operating system , AUDIO and video coding algorithm.Key words: ADSP-BF561; digital video camera; microdrive; MPEG-4;A/D;D/A
上傳時間: 2013-11-10
上傳用戶:yl1140vista
Abstract: When people want portable music, they usually rely on battery-powered AUDIO devices. With a bit of engineeringblood (or curiosity) running in your veins, it is not difficult to build a wireless Bluetooth® stereo AUDIO system that can becontrolled with any device that has a Bluetooth connection and a music player
上傳時間: 2013-10-09
上傳用戶:天空說我在
The NXP LPC315x combine an 180 MHz ARM926EJ-S CPU core, High-speed USB 2.0OTG, 192 KB SRAM, NAND flash controller, flexible external bus interface, an integratedAUDIO codec, Li-ion charger, Real-Time Clock (RTC), and a myriad of serial and parallelinterfaces in a single chip targeted at consumer, industrial, medical, and communicationmarkets. To optimize system power consumption, the LPC315x have multiple powerdomains and a very flexible Clock Generation Unit (CGU) that provides dynamic clockgating and scaling.The LPC315x is implemented as multi-chip module with two side-by-side dies, one fordigital fuctions and one for analog functions, which include a Power Supply Unit (PSU),AUDIO codec, RTC, and Li-ion battery charger.
上傳時間: 2014-01-17
上傳用戶:Altman
AUDIO100 AUDIO tester是短歌行網站(WWW.AUDIO100.COM)開發的音頻信號發生器軟件,提供了35種不同頻率的正弦波信號,也提供了3組粉紅噪音信號和一組20Hz-20kHz的掃頻信號,所有信號的幅度為-20dB。AUDIO100 AUDIO tester中的波形信號全部從專業音頻信號發生儀器采樣,所產生波形的頻率極為準確,失真度也極小,并且提供了專業的音頻測試信號說明。在1.0以前的版本均為測試版本,在以后的版本中將加入更多頻率的正弦波和不同頻率的方波、三角波等波形信號,成為一個具有專業品質的軟信號發生器。
上傳時間: 2013-11-11
上傳用戶:zl520l
AUDIO100 AUDIO tester是短歌行網站(WWW.AUDIO100.COM)開發的音頻信號發生器軟件,提供了35種不同頻率的正弦波信號,也提供了3組粉紅噪音信號和一組20Hz-20kHz的掃頻信號,所有信號的幅度為-20dB。AUDIO100 AUDIO tester中的波形信號全部從專業音頻信號發生儀器采樣,所產生波形的頻率極為準確,失真度也極小,并且提供了專業的音頻測試信號說明。在1.0以前的版本均為測試版本,在以后的版本中將加入更多頻率的正弦波和不同頻率的方波、三角波等波形信號,成為一個具有專業品質的軟信號發生器。
上傳時間: 2013-10-18
上傳用戶:半熟1994
The AVTransmit2 class is very similar to the VideoTransmit, but uses RTP managers to send the video and AUDIO streams.
標簽: VideoTransmit AVTransmit2 the managers
上傳時間: 2015-03-15
上傳用戶:stampede