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應(yīng)用德國Micronas公司的CDC3207G微控制器開發(fā)了一款汽車儀表板系統(tǒng)。詳細(xì)地介紹了該系統(tǒng)的硬件原理，以及步進(jìn)電機，音頻控制，LCD顯示，LED指示燈和報警燈等幾個模塊的實現(xiàn)方法。應(yīng)用μC/OS-II實時操作系統(tǒng)開發(fā)軟件。著重介紹了啟動代碼的設(shè)計和任務(wù)的規(guī)劃。
Abstract:
A dashboard system is developed by using CDC3207G microcontroller made by Micronas.The hardware of the sys-tem and the realization of the step motor module,audio module,LCD display and LED indicator and alarm module are ex-plained in detail.The μC/OS-II real-time operating system is used for the software development and the starting code design and the task planning is explained specifically.
標(biāo)簽：
3207G
3207
CDC
汽車儀表板
上傳時間：
2013-10-26
上傳用戶：x4587
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Virtex-5, Spartan-DSP FPGAs Application Note
This application note demonstrates how efficient implementations of Digital Up Converters(DUC) and Digital Down Converters (DDC) can be done by leveraging the Xilinx DSP IPportfolio for increased productivity and reduced time to development. step-by-step instruction is given on how to perform system-level trade off analysis and develop the most efficient FPGA implementation, thus allowing engineers a flexible, low-cost and low-power alternative to ASSP technologies.
標(biāo)簽：
Spartan-DSP
Virtex
FPGAs
Ap
上傳時間：
2013-10-23
上傳用戶：raron1989
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AT89C2051驅(qū)動步進(jìn)電機的電路和源碼:AT89C2051驅(qū)動步進(jìn)電機的電路和源碼 程序:stepper.c stepper.hex/* * stepPER.C * sweeping stepper's rotor cw and cww 400 steps * Copyright (c) 1999 by W.Sirichote */＃i nclude c:\mc5151io.h /* include i/o header file */ ＃i nclude c:\mc5151reg.hregister unsigned char j,flag1,temp; register unsigned int cw_n,ccw_n;unsigned char step[8]={0x80,0xc0,0x40,0x60,0x20,0x30,0x10,0x90} #define n 400/* flag1 mask byte 0x01 run cw() 0x02 run ccw() */main(){ flag1=0; serinit(9600); disable(); /* no need timer interrupt */ cw_n = n; /* initial step number for cw */ flag1 |=0x01; /* initial enable cw() */while(1){ { tick_wait(); /* wait for 10ms elapsed */energize(); /* round-robin execution the following tasks every 10ms */ cw(); ccw(); } }}cw(){ if((flag1&0x01)!=0) { cw_n--; /* decrement cw step number */ if (cw_n !=0) j++; /* if not zero increment index j */ else {flag1&=~0x01; /* disable cw() execution */ ccw_n = n; /* reload step number to ccw counter */ flag1 |=0x02; /* enable cww() execution */ } }
標(biāo)簽：
C2051
2051
89C
AT
上傳時間：
2013-11-21
上傳用戶：boyaboy
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The XL6003 regulator is fixed frequency PWM Boost (step-up) DC/DC converter, capable ofdriving 1050mA load current with excellent line and load regulation. The regulator is simple to use because it includes internal frequency compensation and a fixed-frequency oscillator so that it requires a minimum number of external components to work. The XL6003 could directly drive 5~10 3W LED units at VIN=12V.
標(biāo)簽：
Boost
6003
300
36V
上傳時間：
2013-11-07
上傳用戶：xy@1314
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The TL2575 and TL2575HV represent superior alternatives to popular three-terminal linear regulators. Due totheir high efficiency, the devices significantly reduce the size of the heatsink and, in many cases, no heatsink isrequired. Optimized for use with standard series of inductors available from several different manufacturers, theTL2575 and TL2575HV greatly simplify the design of switch-mode power supplies by requiring a minimaladdition of only four to six external components for operation.
標(biāo)簽：
step-DOWN
SWITCHING
SIMPLE
1A
上傳時間：
2013-11-20
上傳用戶：jelenecheung
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利用TPM2定時器產(chǎn)生一通道語音信號輸出，語音數(shù)據(jù)為PCM格式:PCM的概念脈沖編碼調(diào)制(Pulse Code Modulation，PCM)是概念上最簡單、理論上最完善的編碼系統(tǒng)，是最早研制成功、使用最為廣泛的編碼系統(tǒng)，但也是數(shù)據(jù)量最大的編碼系統(tǒng)。PCM的編碼原理比較直觀和簡單，它的原理框圖如圖1-1所示。在這個編碼框圖中，它的輸入是模擬聲音信號，它的輸出是PCM樣本。圖中的“防失真濾波器”是一個低通濾波器，用來濾除聲音頻帶以外的信號；“波形編碼器”可暫時理解為“采樣器”，“量化器”可理解為“量化階大小(step-size)”生成器或者稱為“量化間隔”生成器。
標(biāo)簽：
TPM2
PCM
定時器
語音信號
上傳時間：
2013-11-21
上傳用戶：DXM35
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基于單片機的步進(jìn)電機開環(huán)控制系統(tǒng):通過ATMEL89C51單片機對步進(jìn)電機進(jìn)行控制,主要介紹了步進(jìn)電機控制器、驅(qū)動電路和LED顯示電路的設(shè)計,實現(xiàn)了步進(jìn)電機的開環(huán)控制。在步進(jìn)電機控制器的設(shè)計中,重點闡述了脈沖產(chǎn)生電路以及對速度的控制。該系統(tǒng)具有成本低、控制方便的特點。關(guān)鍵詞: 單片機; 步進(jìn)電機; 開環(huán)控制
Abstract: The design using ATMEL89C51 single chip to control the step2motor with its controller, driving circuit and LED disp lay circuit to realize step motor open2loop controlwere introduced. For the controller in this design,the circuit to p roduce pulse and the speed controlwere expatiated emphatically. This system possesses features of lower cost, easier control.Key words: single ch ip; step2motor; open2loop con trol
標(biāo)簽：
單片機
步進(jìn)電機
開環(huán)
控制系統(tǒng)
上傳時間：
2013-10-13
上傳用戶：cicizoe
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51單片機驅(qū)動步進(jìn)電機(含電路圖和源程序代碼）
源程序:stepper.c stepper.hex /* * stepPER.C * sweeping stepper's rotor cw and cww 400 steps * Copyright (c) 1999 by W.Sirichote */ ＃i nclude c:\mc5151io.h /* include i/o header file */ ＃i nclude c:\mc5151reg.h register unsigned char j,flag1,temp; register unsigned int cw_n,ccw_n; unsigned char step[8]={0x80,0xc0,0x40,0x60,0x20,0x30,0x10,0x90} #define n 400 /* flag1 mask byte 0x01 run cw() 0x02 run ccw() */
標(biāo)簽：
51單片機
驅(qū)動
步進(jìn)電機
C語言
上傳時間：
2013-11-09
上傳用戶：釣鰲牧馬
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基于linux操作系統(tǒng)的arm9開發(fā)板的驅(qū)動開發(fā)，詳細(xì)。
標(biāo)簽：
20100605
step_V
Linux
step
上傳時間：
2013-10-16
上傳用戶：zhyfjj
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This application note provides step-by-step instructions on how to recreate a Tri-Mode Ethernet(TEMAC) performance testing system using the ML405 board and MontaVista Linux 4.0. Thisapplication note shows how to set up a simple EDK Base System Builder system on the ML405Evaluation Platform and run performance tests. The network architecture for the test isdescribed. A system is built and downloaded into the FPGA. A MontaVista Linux kernel isconfigured, built, and downloaded into the ML405 Evaluation Platform. The instructions forobtaining and setting up the software used to perform the measurements, netperf, are given.
標(biāo)簽：
Virtex
TEMAC
XAPP
1023
上傳時間：
2013-11-11
上傳用戶：saharawalker
