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SPC3 chip agreement
SPC3 is dedicated to the development of intelligent communication from the station chip, which supports the PROFIBUS-DP protocol. Figure 1 shows the SPC3 structure, and its main properties are as follows: 44 feet, PQFP package; automatically detect the baud rate on the PROFIBUS, from 9. 6kbps to 12Mbps; RS-485 transmission; complete PROFIBUS-DP protocol; integrated monitoring time device; 5V DC power supply.
SPC3 has an integrated 1. 5KB dual-port RAM, the address space from 00H to 5FFH. To 8 bytes for the internal unit, divided into 192 sections. According to the function can be divided into three regions:
00H to 015H to set the registers and status indicators. 016H to 03FH for the parameter configuration area, and length of BUF pointer in this locale. 040H to 5FFH area for the user, to receive applications from the IO and master data. The BUF's configuration, including the length and BUF initial address of SPC3 must be in "offline" status to complete; in operation, in addition to variable-length input and output BUF, other configurations can not be changed. In addition, SPC3 internally also integrates a watchdog timer, can work in three different conditions: the baud rate monitoring, control and DP baud rate control.
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TMS320F206
TMS320F206 is 16-bit fixed-point DSP, computing rate of 40MIPS. It uses static CMOS integrated circuit manufacturing process, the structure of the 'C5x, based on a modified Harvard architecture, there is a program bus and three data bus, pipelining, a parallel 32bit arithmetic logic unit, 16 × 16bit parallel hardware multiply , on-chip memory, on-chip peripherals and highly specialized instruction set. On-chip resources include: an internal clock generator, external clock source × 1, × 2, × 4 and / 2 to generate the CPU clock; chip also RAM4.5KB, FLASH32KB, can be suitable for many engineering applications, 32KB FLASH can be used as program memory, the system design and debugging a great deal of convenience; three external interrupt INT1, INT2, INT; 1 synchronous serial port and an asynchronous serial port; a software programmable timer; four independent programmable I / O pins, an output pin XF and 1 input pin B IO; JTAG emulation interface, scan, used to implement online simulation test.
Hardware system structure
Figure 2 shows the PROFIBUS-DP slave hardware block diagram of the system by the MAX125, TMS320F206, SPC3, EPM7128SQC100, DS1286, HK1225, external RAM and address DIP switches to form a PROFIBUS-DP slave, for railway signal power failure diagnosis. Three-phase AC voltage and current signals by the MAX125 synchronous sampling, DSP algorithms through certain data processing and data computing, and then integrated the relevant switch signal of the diagnosis, control of electrical equipment. While according to the requirements of the PROFIBUS master the necessary data and fault information through the protocol chip SPC3 to the Master. Also the main station from the station by SPC3 settings and remote control of electrical equipment.
As a complete integrated SPC3 DP protocol, the standard diagnostic information from the SPC3 automatically formed and transmitted, so the user will communicate with the DP master to the information stored in the buffer can be specified; when the user needs to receive the information coming from the main station , they only need access to the specified buffer.
TMS320F206 intelligent software design
Data acquisition, data processing, fault diagnosis, and record the necessary information to complete the program in TMS320F206. For continuous monitoring of the system, data acquisition using interrupt method, continuous data collection. Fault information is used for soft interrupt method, the fault alarm information as soon as possible to the SPC3 diagnostics buffer in order to wait for the main station in time for polling. Figure 4 shows the system's main program flow chart.
SPC3 de ruǎnjiàn cāozuò Yóuyú TMS320F206 de sùdù kuài, zài yǔ SPC3 jìnxíng shǔ jù jiāohuàn shí xū sùdù yīzhì. Wǒmen tōngguò ruǎnjiàn shèzhì F206 de děngdài shíjiān shǐ liǎng zhě de sùdù xiāng pǐpèi. Shèjì zhōng duì SPC3 cǎiyòng jiégòu tǐ lèixíng de jìcúnqì de fāngfǎ, duì qí jìnxíng cāozuò. Shǒuxiān dìngyì yīgè yǔ 1. 5KB de shuāng kǒu RAM xiāng duìyìng de jiégòu tǐ lèixíng shùjù “SPC3”, ránhòu F206 jìcúnqì de tóu wénjiàn zhōng dìngyì yīgè “SPC3” lèixíng de jìcúnqì “spc3”, zhèyàng jiù kě fāngbiàn línghuó dì duì qí jìnxíng Cāozuòle. Ruǎnjiàn shǐyòng C yǔyán biānxiě, SPC3 de chū shǐ huà bùfèn chéngxù rúxià: Tóu wénjiàn zhōng dìngyì “spc3” jìcúnqì #Define spc3 ( * ( (volatile SPC3) 0xE800) ) /*SPC3 yǐngshè dào quánjú shùjù kōngjiān de 0xE800* / //Chū shǐ huà cāozuò: GREG=GLOBAL 16K; / *yìngshè dào 16KB quánjú shùjù kōngjiān* / Spc3. Mode_ reg0_ L=0x00d3; Spc3. Mode _reg0 _H=0x0003; /*shèzhì SPC3 de gōngzuò fāngshì* / Spc3. Is reg. Mask[0 ]=0x001e; Spc3. Is reg. Mask[1 ]=0x002d; / *shèzhì SPC3 de zhōngduàn yuán, shèzhì shūchū shùjù chǔlǐ wèi SPC3 yìngjiàn zhōngduàn* / Spc3. R len diag buf[0 ]=16; Spc3. R len diag buf[1 ]=16; Spc3. R len p rm buf=10; Spc3. R len cfg buf=2; Spc3. R len read cfg buf=2; Spc3. R len din buf=244; Spc3. R len dout buf=244; /*chū shǐ huà gè huǎnchōng qì de chángdù/* UserInputBufferPtr=DPS2 GET D IN BUF PTR ( ); / /huòqǔ dì yīgè shūrù huǎnchōng qì dì dìzhǐ UserDiagBufferPtr=DPS2 GET D IAG BUF PTR ( ); // huòqǔ dì yīgè zhěnduàn huǎnchōng qì dì dìzhǐ UserDiagFlag=TRUE; ...... Běnwén cǎiyòng yùnsuàn sùdù kuài de 16 wèi DSP shèjìle yīgè PROF IBUS2DP zhìnéng cóng zhàn, zhè shǐde xiànchǎng zǒngxiàn de yìngyòng gèngjiā guǎngfàn.
将检测到中文译成英语
Software Operation of SPC3
As TMS320F206 faster, data exchange with the SPC3 consistent speed is required. We set the F206 software to make the waiting time to match the speed of the two. The design of the structure type SPC3 register using the method of its operation. First, define a 1. 5KB dual-port RAM structure corresponding to the type of data "SPC3", then F206 register header file defines a "SPC3" type of register "spc3", so you can be flexible to facilitate the operation. Software written in C, SPC3 initialization part of the procedure is as follows:
Header file "spc3" register
# define spc3 (* ((volatile SPC3) 0xE800))
/ * SPC3 alluding to the global data space 0xE800 * /
/ / Initialization:
GREG = GLOBAL 16K; / * mapped to the 16KB global data space * /
spc3. mode_ reg0_ L = 0x00d3;
spc3. mode _reg0 _H = 0x0003; / * set the work of SPC3 * /
spc3. is reg. mask [0] = 0x001e;
spc3. is reg. mask [1] = 0x002d; / * set the SPC3 interrupt source, set the output data processing hardware interrupts for the SPC3 * /
spc3. r len diag buf [0] = 16;
spc3. r len diag buf [1] = 16;
spc3. r len p rm buf = 10;
spc3. r len cfg buf = 2;
spc3. r len read cfg buf = 2;
spc3. r len din buf = 244;
spc3. r len dout buf = 244; / * initialize the buffer length of the / *
UserInputBufferPtr = DPS2 GET D IN BUF PTR (); / / Get the address of the first input buffer
UserDiagBufferPtr = DPS2 GET D IAG BUF PTR (); / / Get the address of the first diagnostic buffer
UserDiagFlag = TRUE;
......
In this paper, operation speed, 16-bit DSP designed a PROF IBUS2DP intelligent slaves, which makes the application of more extensive field bus.
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8-bit design using TMS320F206 SPC3 8-bit data line low, and mapped to the global data space; will also DS1286, HK1225 digital input and digital output is mapped to the global data space. This, DSP for their operation, as easy as operating an external RAM. Programming in 16-bit DSP for SPC3, DS1286, HK1225 write operation, the first to write low-high 8-bit 8-bit write.
System software
PROFIBUS-DP slave (ie, fault diagnosis of terminal units) to complete the main data acquisition, data processing, fault diagnosis and the necessary energy parameters and fault information according to the requirements of the master station to the main station, and from the master station to station the assignment.
SPC3 communication software design
Design parameters will be seen as a power input of data from the station, the main station from the station's assignment as the output data, while the diagnostic process as an external fault information. For the master assignment using SPC3 interrupt handling means in order to achieve real-time. In addition, the parameters of the messages, configuration messages are SPC3 interrupt processing program to complete. SPC3 interrupt program flow chart shown in Figure 3.
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