在深入了解Flash存儲器的基礎(chǔ)上，采用單片機自動檢測存儲器無效塊。主要通過讀取每一塊的第1、第2頁內(nèi)容，判斷該塊的好壞，并給出具體的實現(xiàn)過程，以及部分關(guān)鍵的電路原理圖和C語言程序代碼。該設(shè)計最終實現(xiàn)單片機自動檢測Flash壞塊的功能，并通過讀取ID號檢測Flash的性能，同時該設(shè)計能夠存儲和讀取1GB數(shù)據(jù)。
Abstract:
On the basis of in-depth understanding the Flash chips，this paper designs a new program which using the SCM to detect the invalid block.Mainly through reading the data of the first and second page to detect the invalid block.Specific implementation procedure was given,and the key circuit schematic diagram and C language program code was INtroduced.This design achieved the function of using the MCU checks the invalid block finally，and increased the function by reading the ID number of Flash to get the performance of the memory.And the design also can write and read1GB data
首先研究CAN總線和SAE J1939協(xié)議，提出一種基于MC9S12HZ256微控制器的總線式汽車數(shù)字儀表解決方案。詳細(xì)介紹SAE J1939協(xié)議的報文幀格式及應(yīng)用層協(xié)議中發(fā)動機相關(guān)參數(shù)的定義，以及步進(jìn)電機及其驅(qū)動和車速信號的處理方法。該數(shù)字儀表系統(tǒng)硬件平臺由微處理器和信號采集和信息處理及顯示等模塊組成。軟件設(shè)計部分編程實現(xiàn)了對CAN總線和各傳感器數(shù)據(jù)的讀取、處理。該系統(tǒng)能夠?qū)崟r反映車輛工況。
Abstract:
In this paper，CAN bus and SAE J1939protocol are researched，and a vehicle digital instrument solution based on MC9S12HZ256MCU is proposed.The message frame format and some engine-related parameters’definition in SAE J1939application layer protocol are INtroduced in detail.Stepper motor and its driver，the methods of speed signal process-ing are also INtroduced.The hardware platform of vehicle digital instrument is composed by MCU，signal acquisition mod-ule，and signal processing and displaying module.Data receiving and processing from CAN bus and sensors are accom-plished by programming，and vehicle condition can be reflected in real-time.
實時時鐘是微機保護(hù)裝置的重要部件，在討論PCF8583結(jié)構(gòu)與功能的基礎(chǔ)上，提出采用dsPIC33F系列微處理器與串行I2C時鐘PCF8583的接口設(shè)計方案，給出了相應(yīng)的接口電路與軟件流程。該設(shè)計方案結(jié)構(gòu)簡單，可靠性高，開發(fā)周期短，具有一定的實用與參考價值。所設(shè)計的微機保護(hù)裝置已投入現(xiàn)場運行，效果良好。
Abstract:
Real-time clock chip is an important part in microcomputer protection device.Based on discussing the structure and function of PCF8583，a new interface scheme which uses dsPIC33F microprocessor and serial clock chip（I2C）PCF8583is proposed.The method of the circuit design and the main software flow are INtroduced in this paper.The scheme has simple structure，higher reliability and shorter exploitation cycle，so has definite practicality or reference value.The microcomputer protection device has been put into operation with better effects.
介紹一種基于C8051單片機的動態(tài)心電監(jiān)護(hù)系統(tǒng)。該系統(tǒng)由兩部分組成：以C8051F320單片機為核心的數(shù)據(jù)采集裝置和以PC機為平臺的分析處理系統(tǒng)。硬件電路功耗低，由單片機自帶的USB接口將數(shù)據(jù)傳送給PC機。軟件平臺采用LabVIEW可視化虛擬儀器系統(tǒng)開發(fā)平臺，將傳統(tǒng)儀器的功能模塊集成到計算機中，用戶可通過修改虛擬儀器的程序改變其功能。采用USB接口實時傳輸心電數(shù)據(jù)，并將數(shù)據(jù)采集模塊設(shè)計為計算機外設(shè)，使該系統(tǒng)高速快捷、小巧便攜。
Abstract:
In this design，a low-cost ECG electrocardiogram monitoring system is INtroduced，which consists of two parts:data acquisition device based on C8051F320and PC terminal as the analysis and processing system.The system is low-power consumption，the data is transmitted to the PC terminal by USB interface of the C8051F320.By using the visible virtual instrument system developing platform LabVIEW，the traditional instruments function modules are integrated into the computer，so the user can modify virtual instrument software to change its function to meet their needs.Using USB in-terface to realize real-time ECG data transmission，in addition，ECG data acquisition module is designed as the computer peripheral，which makes the syetem high-speed and portable.
MG3500SoC是支持H.264高清編解碼器的片上系統(tǒng)，內(nèi)部集成一個嵌入式ARM926處理器，支持高清H.264編解碼、MPEG鄄2解碼和JPEG編解碼。介紹了MG3500SoC的主要性能特點、引腳排列、主要接口功能及在DVR上的應(yīng)用，以及MG3500SoC及其周圍器件的硬件設(shè)計，提出了在設(shè)計中應(yīng)注意的問題。
Abstract:
The MG3500System-on-Chip（SoC）is high definition（HD）H.264codec,including ARM926-EJ processor，H.264encoder/decoder，MPEG2decoder and JPEG/MJPEG encoder/decoder.The features,pin assignments，interfaces and the typical application of MG3500in DVR are INtroduced in this paper.The application hardware circuit between the MG3500SoC and peripheral device are given,the questions which the syetem design needs to pay attention are explained.
詳細(xì)介紹了PCI9052接口器件的功能、結(jié)構(gòu)和使用方法，并結(jié)合實際給出了基于PCI9052器件開發(fā)PCI總線接口卡的應(yīng)用實例。
Abstract:
The main functions,structures and usage of PCI9052inferface chip are INtroduced in detail in this paper.And an
application example of designing PCI bus interface card based on PCI9052is proposed in this paper.
介紹基于ISA總線與KH-9300的數(shù)據(jù)采集板卡的設(shè)置，詳細(xì)說明8254定時計數(shù)器及8259中斷控制器的結(jié)構(gòu)特點、工作方式、控制字等，探討中斷類型、中斷處理程序、中斷矢量表及其填寫。重點講述使用TorboC編寫中斷服務(wù)程序的方法，應(yīng)注意的主要問題及程序測試的結(jié)果。
Abstract:
The settings of KH-9300 data acquisition board based on the ISA bus is INtroduced,the structural characteristics,working methods,control characters of the timing counter 8254 and interruptioncontroller 8259 are explained in detail.The interruption type,interrupt handling programs,interruption vector table and its filling also are discussed.Further,great emphasis is put on the method of interrupt service program compiled by Torbo C,the main issues that should be noted,and the results of program testing.
介紹了當(dāng)前普通標(biāo)記機控制系統(tǒng)現(xiàn)狀及其存在缺點，給出氣動標(biāo)記機及相頻修正PWM模式的工作原理。采用ATmega16單片機和USB轉(zhuǎn)換RS232接口器件CH341T實現(xiàn)驅(qū)動控制系統(tǒng)與PC的實時通訊，標(biāo)記控制系統(tǒng)可升級到USB接口。采用基于ATmega16的相頻修正PWM替換555振蕩電路產(chǎn)生的PWM，可直接通過軟件調(diào)整PWM信號。使用達(dá)林頓三極管TIP122替代直流繼電器驅(qū)動高頻電磁閥，使得電磁閥驅(qū)動電路簡單，成本低廉。該控制系統(tǒng)已成功應(yīng)用于氣動標(biāo)記機。
Abstract:
In this paper,the actuality and demerit of the common gas marking machine control systems are described.The operation principle of the gas marking machine and the phase and frequency correct PWM of ATmega16is INtroduced.The real-time communication between the driving control system and PC by CH341T which its function is translated USB to RS232is realized,the control systems is updated grade to USB interface.The PWM signal can be adjustable by software for the555surge circuit was substituted by the phase and frequency.The high frequency electromagnetic value’s driving circuit by DC relay is replaced by TIP122,therefore,the circuit is become simple and the cost cheap.The control systems has been widely used in gas marking machine.
介紹基于VHDL的微型打印機控制器的設(shè)計。論述了微型打印機的基本原理，以及實現(xiàn)控制器的VHDL語言設(shè)計。打印機的數(shù)據(jù)來自系統(tǒng)中的存儲模塊，根據(jù)需要控制打印。該微型打印機控制器可取代傳統(tǒng)的微型打印機,且抗干擾性好,可靠性高，具有較強的移植性，稍加改動就可應(yīng)用于不同場合。
Abstract:
This paper INtroduced the design method of micro printer controller based on VHDL.The basic principles of microprinter is explained,as well as the realization of the controller by VHDL language.The printer data is from the system memory modules,can control printer.The design of microprinter controller has antigood and high reliability，it can replace the traditional printer.The controller has very good portability,and need little modify that can use in different situation.
介紹了一種TI公司最新推出的MSP430F247單片機，利用它自帶的I2C模塊驅(qū)動I2C總線的溫度傳感器TMP275。TMP275是一款具有高精度、低功耗的新型溫度傳感器。由于TMP275具有可編程功能，纖小的封裝以及極大的溫度范圍，因而廣泛應(yīng)用于組建超小型溫度測量裝置。
Abstract:
A new single chip microcomputer MSP430F247 which is released by TI is INtroduced.It can drive I2C interface digital temperature sensor TMP275 with I2C module.TMP275 is a new temperature sensor which has high accurate,low power. Because TMP275 has programmable function,small packages and wide temperature range,it is applied widely in very little temperature measurment equipment.
