外文文獻翻譯-基于μC OS-Ⅲ的多路數(shù)據(jù)采集設(shè)計與實現(xiàn)【中文2062字】【PDF+中文WORD】

外文文獻翻譯-基于μC OS-Ⅲ的多路數(shù)據(jù)采集設(shè)計與實現(xiàn)【中文2062字】【PDF+中文WORD】,中文2062字,PDF+中文WORD,外文文獻翻譯-基于μC,OS-Ⅲ的多路數(shù)據(jù)采集設(shè)計與實現(xiàn)【中文2062字】【PDF+中文WORD】,外文,文獻,翻譯,基于,OS,路數(shù),采集,設(shè)計,實現(xiàn),中文,2062 Design and Implementation of Multi-channel Data Acquisition Based on C/OS-Wang xiaokai,Guo gaizhi,Wang zhonghua College of Computer and Information Engineering,Inner Mongolia Normal University China , Key words:C/OS-,data acquisition,DSPIC30F6014 Abstract.This paper achieves task scheduling of the multi-channel data acquisition based on the operating system of C/OS-It realizes transplanting the operating system of C/OS-on DSPIC30F6014 to acquire the data of the voltage current temperature and power through)The experiment shows that it can acquire and process multi-data timely,then displays the information on the LCD.Introduction The multi-channel data acquisition is information processing module commonly used in the industrial control.The data it acquired is the parameter often used in industrial production.So the module of multi-channel data acquisition based onC/OS-in this paper is main functional module of the electrical regulator.It can control the conduction angle of SCR(silicon controlled rectifier)to regulate the voltage current temperature power and so on to reach the technical parameter in the industrial production according to the list of the parameter and multi-channel data timely.The processing method of multi-channel information is portable and can be used in every embedded device to acquire the multi-channel information with wide application prospect.The hardware design The description of dsPIC30F6014 chip.dsPIC30F6014 is the digital signal controller made by the world leading provider of microcontroller and analog semiconductor(Microchip).It uses high-performance modified RISC integrates with MCU and DSP seamlessly,and the CPU module uses 16-bit(data)and 24-bit(instruction)modified Harvard architecture with an enhanced instruction set including significant support for DSP.The dsPIC30F6014 has MCU and DSP double engine,so its instruction set has two classes of instructions:MCU and DSP.These two instruction classes are seamlessly integrated into a single and execute from one execution unit.The whole data space of processor is 64K,because the chip itself contains a DSP engine,and many DSP operations are executed in parallel,thus data space is split into two blocks,referred to as X and Y data memory.Each of the memory blocks have their own independent address generating unit(Address Generation Unit,AGU).The instructions of MCU class operates solely through the X memory AGU,which accesses the entire data space as one linear data space.Certain DSP instructions operate through the X and Y AGU to support read operation of dual operand at the same time,which splits the data space into two parts.dsPIC30F6014 also has abundant peripherals which allow devices to exchange the information with the outside world.The peripheral feature of dsPIC30F6014 is high-current sink/source I/O pins,five 16-bit timers/counters and 16-bit timers can be optionally configured as two 32-bit timers,3-wire SPI modules,two addressable UART module with FIFO buffer and conversion rate with 200Kips,12-Bit Analog-to-Digital Converters(A/D)with 16 input channels1.Configuration of A/D module.The dsPIC30F6014 A/D converter is convenient for acquisition data.The main job is the configuration relevant registers according to the sampling rate of acquisition signal and numerical format after quantified2.Follow the following steps to perform an A/D module.Advanced Engineering ForumOnline:2012-09-26ISSN:2234-991X,Vols.6-7,pp 796-799doi:10.4028/ 2012 Trans Tech Publications Ltd,SwitzerlandThis is an open access article under the CC-BY 4.0 license(https:/creativecommons.org/licenses/by/4.0/)1.Select source voltage to match the expected of analog input 2.Select the clock to match desired data rate with processor clock 3.Determine how sampling will happen 4.Determine how inputs will be allocated to the S/H channel 5.Determine how the conversion results will appear in the buffer 6.Select interrupt rate 7.Switch on A/D module The software design Device configuration.The user can use the device configuration register to customize certain aspects of the device.The device configuration registers are nonvolatile memory locations in the program memory.It can save dsPIC6014 configurations during power-off.The configuration registers save global configuration information of devices,such as the source of oscillator,the mode of watchdog timer,code protection and so on._FOSC(CSW_FSCM_OFF);/turn off failsafe _FWDT(WDT_OFF);/turn off watchdog _FBORPOR(PBOR_OFF);/power-up timer disable _FGS(CODE_PROT_OFF);/user program memory isnt code-protected Configuring A/D module.This system mainly uses AN3-AN6 channel to acquire voltage,current,temperature and power,then stores the data to ADCBUF and transfers these data to the microprocessor.The microchip displays the data on the LCD3 Perform an A/D conversion according to the following steps ADCON2=0X042C;/V REFH=AVDD VREFL=AVSS ADCON3=0X000F;/Tad=8Tcy ADCON1=0X0044;/compare end sampling using timer3 ADCSSL=0X00F0;/scan input select from AN3,AN4,AN5,AN6 ADCON1bits.ADON=1;/turn on A/D Fig 1 The interrupt service flow diagram Porting C/OS-.There are two main jobs of C/OS-transplant,One thing is the design of the interrupt handler program,the other thing is the design of the time program.1.The design of the interrupt handler is an important part of hardware abstraction layer in the embedded operating system.ForC/OS-,every interrupt handler must be written in assembly language.In addition handling the Advanced Engineering Forum Vols.6-7797interrupt is not the same in different compilers.The dsPIC compiler retains a interrupt vector for each interrupt.When the interrupt occurs it will automatically jump to the interrupt vector.The first step is saving the interrupt scene,if this is not interrupt nesting,then saves the pointer of the task stack,clears the interrupt flag status,calls the C interrupt service function,interrupt exits).if this is interrupt nesting,then not saves the pointer of the task stack,calls and processes the C interrupt service function.2.The design of the system time.C/OS-,like other computer operating systems,uses the hardware time to realize the system time with a millisecond time interrupt.The design uses timer 1 for system time.The step of initializing timer is that:1 clear TM R1 bit2 setup Time1 interrupt for desired priority level 3 clear the Time1 interrupt status flag 4 enable Time1 interrupts 5 starts Time1 with prescaler settings and clock source set.2 select internal clock source.3 set the frequency demultiplication,interrupt cycle(10 ms),the interrupt priority.3 clear interrupt flag bit and enable interrupt.4 start a timer4.C/OS-architecture:(1)APP.C and APP.H are the main the application file.(2)*.h and*.c are library files provided by the manufacturer of CPU.(3)BSP.H and BSP.C are interface functions to peripherals in the aim circuit board.(4)OS_CFG_APP.C and other files are files that are processor-independent and C/OS-.(5)OS_CPU.H and other files are files that are processor-dependent and make modification when you transplant C/OS-.(6)CPU.H and other files summarize main function of CPU,for example disable and enable interrupts.(7)C/LIB is a series of source that provide common functions such as the operation of the string.(8)0S_CFG.H and OS_CFG_APP.H define mainlyC/OS-features such as idle task stack size,tick rate,etc5 Fig 2:C/OS-architecture Conclusions The paper explains in detail the design and implementation of multi-channel data acquisition based onC/OS-.The paper realizes 4-channel data acquisition with the dsPIC30F6014.The experiment shows that this system can acquire and process timely multi-channel data and schedule multi-task withC/OS-operating system.Then it meets the need of the electrical regulator.This design has the very strong versatility,just to replace the system microprocessor-dsPIC30F6014A 798Information Technology for Manufacturing Systems IIIby other processor chip,can be realize real time signal acquisition and storage processing through appropriate modifications in accordance with the method described in this paper,with a very broad application prospects.Figure 3 The running system Acknowledgment The project is Supported by the Inner Mongolia Natural Science Foundation(2010MS0918),the High Education Science Research Program of Inner Mongolia(NJ09038)and the Youth Foundation of Inner Mongolia Normal university(ZRYB09013).References 1 Microchip Technology IncdsPIC30F Enhanced Flash 16-Bit Digital Signal Controllers General Purpose and Sensor Families Data SheetEB/OL，2006 2 Wang fang.High-speed signal acquisition and processing system and its application.Northwestern polytechnic university.2006 3 Wen xia Design and Implementation of the signal acquisition circuit 4 information on 5 Jean J.Labrosse C/OS-The Real-Time KernelM Micrim 2011 Advanced Engineering Forum Vols.6-7799