ST7540 power line modem demokit graphical user interface (GUI)
Contents
1. r 17 Frequency detection time SE SE SS SE SE eee hh nr 18 Output voltage freeze ee eee eee eee eens 18 Beds oe es Ore EE EE AE esegue E eqs 18 Header seels ole MEE TE SEEN doe EEN IE OE EE ER EE KEER TOR 19 Frame Length COUNL pawawaak AR MR Se Seay an d de d a irap dct di uii ep weds OR me wate da 19 Header LENGIR ARE nak MAAM GA AKA DAA BEA ALONE EE RR EE OD 19 Extended control register 3x vaca kdo WG DNA RC P dea DE a BUR qe deu aad ded end 20 Eg SIES els PRES N N EET EE EE OE EE EER ER KANG GN 20 EE EE ET DEE OR N EE EE NET 20 Pie lei ens hee nacuse ee bene hone bs KA RES DA RE he nk oe heen MAAM KA 20 BASS e ote de TIT TII TIT DI OE EE KAO 4 21 Limitations on control register parameters SES ESE SE eee 21 Summary Of EVENIS 2222278 5 245 3 525 rex 99 EOS BANYAGA AMAG a anes REG 22 Ping master parameters cee hh hh 29 Ping slave parameters anaana dk drin ac od Road e DE ded ao OR nd OG LA deco ied 31 a cde A CP cr r TT 43 SZA www BDTIC com ST UM0239 List of figures List of figures Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24 Figure 25 Figure 26 Figure 27 Figure 28 cU RENE N EO ET ME SE EE ER ER OR ON EET EED 10 TOODA2. GTi UMO239 YI User manual 517540 Power Line Modem Demokit Graphical User Interface GUI Introduction The ST7538 40 FSK Power Line Modem Demo Kit is a software tool that allows interfacing one or more ST Power Line Modem PLM Demo Boards with a Personal Computer Only PLM Demo Boards equipped with ST7538 and ST7540 devices are supported The typical Application Environment consists of a PC that communicates through a ST7 microcontroller placed on a general purpose board called EVALCOMMBOARD see Section 1 5 with a Power Line Modem Board equipped with ST7538 or ST7540 products as shown in Figure The interface used to communicate between the PC and the EVALCOMMBOARD is the RS 232 USB interface will be supported in future At start up the Software recognizes automatically which type of device is connected to PC and modifies its appearance differently for the ST7538 or the ST7540 This document describes the ST7540 operating mode see Section 7 5 A schematic of the application environment EVALST7538DUAL or EVALST7540 1 EVALCOMMBOARD RS 232 or USB PERSONAL ST 7538 40 DEMOKIT GUI With the ST 7538 40 FSK Power Line Modem Demo Kit it is possible to e Write read ST7540 or ST 7538 Control Register e Open a Tx session e Open a Rx session e Open a Ping session minimum two devices required July 2006 Rev 1 1 44 www st com www BDTIC com ST Contents UM0239 Contents 1 Installat
3. e LINK o LINK Sensitivity MONTOS S ngitidty MONITOR Header Length Mode Pre Filter no Heats Length Mode Pre Filter oe NORMAL MEN OFF BEE isore NORMAL S OFF 7 fh ci igi T 7 Extended Reg Pei Hac Foe Length ias iU Extended Reg Fr Hati Frame Length Hed DISABLED Jasa t DISABLED vj JAYA zu mes s U MSB CONTROL REGISTER LSB MSB CONTROL REGISTER LSB 000100110001001011010010 Bits 23 0 000100110001001011010010 Bits 23 0 111111111010101010101010 Bits 47 24 111111111010101010101010 Bits 47 24 Ho ose Once the Control Registers are correctly configured communication can begin between the boards Communication session without Frame Synchronization In this example the board connected to COM 1 is used as the Transmitter while the board connected to COMS is used as the Receiver Five messages are transmitted across the Mains and the receiving method is not synchronized so incoming data from ST7540 are sent directly to the PC Actions to perform on GUI connected with COM3 1 Click Rx on toolbar to open the Rx Monitor dialog box 2 Set FRAME SYNC to OFF 3 Click ON Now the receiving board is waiting incoming data It activates itself only when a preamble is detected across the Mains Actions to perform on GUI connected with COM1 1 Click Tx on toolbar to open the Tx Monitor dialog box 2 Write the preamble AAAAAAAA
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5. 1 Minimum Wait time values are 9600 bps 800 ms 1200 bps 150 ms 2400 bps 75 ms 4800 bps 40 ms Starting a Master Ping session Click Ping Start to start the ping session The MCU on EVALCOMMBOARD continuously transmits the current status of every message transmitted to the PC Click Ping Stop to end the ping session Click Close to close the Ping Master dialog box a www BDTIC com ST UM0239 Ping sessions 7 2 Opening a Ping Slave session 7 2 1 Ping Slave parameters As shown in Figure 17 Table 25 following parameters can be selected for the Slave device and the ping session Figure 17 Ping slave window PING ST7540 PING SLAVE WINDOW Ping Slave 100 100 100 Slave Address 4 1 50 50 50 0 0 0 0 0 0 Medium Access Control Messages Messages Messages K SLAVE ADDRESS Get Statistical Data MEDIUM ACCESS CONTROL SETTINGS corrected RX more Max Max Wait through FEC than once Wait Slot Nr Time ms E ic a E 3 0 g EF 1000 100 100 50 50 O 0 0 0 Last Received Message LAST RECEIVED 0 MESSAGE Non Messages with INFORMATIONS PING START Received PING S Z CLOSE STATISTICAL INFORMATION OK D Corrected U RX more 0 than once KO O Wrong FCS O Non RX D Messages wrong FCS EXECUTE STOP CLOSE BUTTONS Table 25 Ping slave param
6. 250 Vrms Pre filter The Pre filter parameter Bit 23 enables a pre filter on the Reception path Table 19 Pre filter EE Disabled default Frame header The Frame Header Bits 39 24 defines the Header to recognize when the Header Recognition function is enabled It can consist of one 16 bit header or by two 8 bit headers depending on the Header Length value Bit 20 This function is available only if the Extended Control Register parameter Bit 21 is enabled Table 20 Pre filter MSB LSB From 0x0000 to OxFFFF Default Ox9B58 Frame length This parameter Bits 47 40 defines the number of data expressed in 16 bit words e g Frame Length equal to 1 16 bits to send to the Host Controller on the RxD line when the Header Recognition and Frame Length Count parameters are enabled and a Header has been detected This function is available only if the Extended Control Register parameter Bit 21 is enabled lt www BDTIC com ST UM0239 4 2 19 4 3 x Getting started Table 21 Frame length MSB LSB From 0x00 to OxFF Limitations on Control Register parameters Certain parameters are limited during programming because either their functions are not supported by the tool software limitations or because they depend on other Control Register parameters hardware limitations Table 22 lists these limitations Table 22 Limitations on control register parameters merac eds al l
7. I amp PC Division icatic rch www BDTIC com ST UM0239 Note 8 2 lt Communication session examples After selecting COM port the Status Bar is updated showing information about the selected COM port SW FW revisions and the Link status Before starting a Communication session the user must perform a Write Control Register for the two windows 3 Click REG on the toolbar to open the Control Register dialog box 4 Ensure that the Dual Channel feature is disabled 5 Because only few bits change for the sessions in respect to the default Control Register parameters click Read CTRL Register and then Update CTRL Panel 6 Set the Carrier Frequency to 72 kHz and the Detection Method to Preamble to ensure that the incoming data are received only when a preamble is detected across the Mains Now the two Control Register dialog boxes should appear as shown in Figure 22 Figure 22 Control Register dialog boxes after setup COM 1 COM 3 Carrier Freq Baudrate Deviation Interface Watchdog J RESET Carrier Freq Baudrate Deviation Interface Watchdog jj RESET 72kHz 240 j o5 v sync rj ENABLED v EVENT 72kHz A 240 j os rj SYNC rj ENABLED v EVENT Detection Detection J THERMAL Detection Detection J THERMAL Timeout Method Time put Pigeze Output Clock EVENT Timeout Method Time 2 Output Clock EVENT is m PRE 1 ms GISABLED 4MHz gt 1s rj PRE 1 ms M MHz E dl
8. Master waits for a time selected randomly between 4ms and 4 Max Wait Slot Nr ms before to analyze if it is possible to transmit a packet Defines the maximum time to wait when BU or PD Medium Access control Max wait time are selected before to transmit the packet When the Max Wait Time is elapsed the packet is transmitted even if BU or CD PD lines are actives Current message settings Shows information about the acknowledgement of the current message sent Last Addressed Slave represents which Slave is the recipient of message Current message LEDs show if a message is acknowledged properly OK not correctly status acknowledged No Ack if the acknowledged message has errors corrected by FEC Master used FEC or if the acknowledged message has errors not corrected by FEC Wrong FCS Statistical data display These data are available for each Slave Enter the name of the Slave device in Slave Description textbox OK messages the total number of messages properly received plus those corrected through FEC Corrected messages the number of messages corrected through FEC KO messages the total number of messages with wrong FCS plus the number of message not acknowledged Wrong FCS messages the number of messages with wrong FCS even after correction Not ACK messages the number of messages not acknowledged Click Save Statistics to store collected data in a text file Statistical data for Slave
9. To File SW sync OFF 8 5 Ping session In this example the board connected to COM1 is the Master while the board connected to COMsS is the Slave 100 messages are exchanged from Master to Slave and statistical data as for Master as for Slave are saved in two text files Actions to perform on GUI connected with COM3 1 Click PING on toolbar to open the Ping dialog box Select Slave and click OK 3 Set Slave Address to 1 4 Write Ping session nr 1 in Slave Description field 5 Set Medium Access Control to PD Max Wait Slot Nr to 10 and Max Wait Time ms to 1000 6 Click Ping Start Actions to perform on GUI connected with COM1 Click PING on toolbar to open the Ping dialog box Select Master and click OK Set Master Address and Nr of Slave Addresses to 1 Set Nr of Messages to 100 and Repetition Control to 3 Set Wait Time ms to 255 Set Medium Access Control to PD Max Wait Slot Nr to 10 and Max Wait Time ms to 1000 7 Click Ping Start to start the ping session DO NN Saving statistics When all messages are transmitted on the Ping Master dialog box click Save Statistics and selecting the path and the name of the text file in this case Ping session nr 1 Master txt x 41 44 www BDTIC com ST Communication session examples 42 44 UM0239 To save Slave statistics click Get Statistical Data to update the statistics click Save Statistics and selectin
10. dialog box 2 Write the preamble AAAAAAAA in the hexadecimal textbox 3 Add the header 9B58 in the hexadecimal textbox 4 Add the text string transmission with ST7540 synchronization length 40 bytes in the ASCII textbox 5 Select Sequence Mode and set Nr to 5 6 Click ON Five messages are transmitted Using the Hardware Frame Synchronization feature the user ensures that the transmitted bytes always arrive synchronized to the PC as shown in Figure 26 a 40 44 www BDTIC com ST UM0239 Communication session examples Figure 26 Communication with Hardware Frame Synchronization COM 1 COM 3 ZH dr YM exa transmission with ST7540 4 synchronization 74726 16e736d697373696f6e2077697468 4 transmission with ST7 4 205354373534 302073796e63687 26f6eb9 540 synchronizationtr TaB174B86fBe 74726 16e 736069737 36966 ansmission with ST75 e207 7697468205354373534302073796e6 40 synchronizationtra 3687 26f6e697a61 74696fbe7472616e736d nsmission with ST754 69737369bfbe207 7697468205354573534 D synchronizationtran 3020737 96e63687 26f6e697a61 74696f6e7 smission with ST7540 4726 16e7A6d697373696fBe 207 76974682 synchronizationtrans 05354373534302073796e63687 26f6e697 mission with ST7540 ab174696fbe7472616e736d697373696fbe synchronization 207 7697468205354373534302073796e63 687 26f6e697ab1 74696fbe a a Fwd i x NE FRAME SYNC er FORCE SENS X a xn TO BO LEVEL FRAME Header 0x9B58 RX OFF Save
11. in the hexadecimal textbox 37 44 www BDTIC com ST Communication session examples UM0239 3 Add the text string transmission without synchronization in the ASCII textbox 4 Select Sequence Mode and set Nr to 5 5 Click ON Five messages are sent with a temporal distance of 200 milliseconds Figure 23 Communication without Frame Synchronization example RX MONITOR Hexadecimal ASCH 555555323930b739b6b4b9b9b4b7b7103b2 JUUU 90 9 47 9 4 DEED ASCH b4ba3437baba1039bcb731b43937b734bd Ere ME again 30ba34b7b7Daaaaaa9d 1c985b9cdb5a5cd aaaaaaaa747261be736d697373 4 je rransmission without synchro 4 cda5bdb88 1dda5d la 1bdd5d08 1cde5b99d B9BfBe20776974688f757420737 nization alcS8bdb8a5e885d1a5bdb85555554e8e4c 96e6368726f6e697a6174696f6e EE a aaa aa EFESE ESE BEE Ee Eed Pa v Sequence E MN x BB Es CLOSE Load File Nag 34bd30ba34b7b a a 4 FRAME SING c De FORCE SENS y EN Y roBUieve 4 Synchronized ny EE Message E EE RESET SCOPE CLOSE In Figure 23 COMG section the five transmitted sequences do not appear to be received correctly This behavior is due to fact that the ST7540 starts writing data on the RX line at different time for every message because in Synchronous Mode the PLL that provides the CLR T signal must reach the lock in condition Lock in condition can only be reached after an undetermined number of demodulated data transitions maximum 5 and dur
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13. rr 36 8 1 1 Required hardware 0 00 ccc eee eee eee 36 8 1 2 Hardware setup naa SES ES SE SE eee ene 36 8 1 3 Solware SCIUD sis dox EER HEERS Hx PDA dE EUR EE 49 E i 36 8 2 Communication session without Frame Synchronization 37 8 3 Communication session with Frame Synchronization 39 8 4 Communication session with Hardware Frame Synchronization 40 8 5 xk AD EE N OE AA 41 9 Revision history pakanan s e ROES ESR AS ESME URE SERE M AE SE HE 43 STA 3 44 www BDTIC com ST List of tables UM0239 List of tables Table 1 Table 2 Table 3 Table 4 Table 5 Table 6 Table 7 Table 8 Table 9 Table 10 Table 11 Table 12 Table 13 Table 14 Table 15 Table 16 Table 17 Table 18 Table 19 Table 20 Table 21 Table 22 Table 23 Table 24 Table 25 Table 26 4 44 Commonly USCCICING c2saenchscedecectdeteeauege segues eebencesearatace at 9 Menu Dar Goed concwacn OOR RE oe Goueeoh ences HELE KAREE REGSES EDE EE 11 Summary of Control Register parameters nanana aa SE SE SE ee eee 15 Cather WCQUCNCY a6 ate b RARR tertre SS ESE RE HR AE DO ARE EER HOG babe a Pee 16 Elle ME N TT EE One Oo NE OE ET ER EE N 16 BI MA e EET TE EE ER EO HIE AA 16 Mains interfacing Mode 0 cee eee eee eens 16 WALDO AN EE eens dyed oe Addo Vink LUANE AGAD aA Shree eee eee MAA 17 Transmission ase va DE RE N AO EE eae a PR 2 17 DCTS COM MEON p T
14. the signal is transmitted or received across the mains If Dual Channel feature is disabled the Carrier Frequency parameter must be set through the ST7540 Control Register Parameter Panel Otherwise the Dual Channel Selection panel must be used For more information see Section 4 3 Selecting the Dual Channel option on page 21 15 44 www BDTIC com ST Getting started UM0239 4 2 2 4 2 3 4 2 4 16 44 Table 4 Carrier frequency Bits 2 to 0 MSB to LSB Value a n Bits 2 to 0 MSB to LSB Value kHz a ee ee AE AN EET Baudrate The Baudrate parameter Bits 4 3 defines the speed of communication Table 5 Baudrate Bits 4 to 3 MSB to LSB Value bps Bits 4 to 3 MSB to LSB Value bps AA NN EE w T 4800 Deviation The Deviation parameter Bit 5 defines the frequency difference between the mark and the space frequency When set to 0 5 the difference is one half the Baud Rate value Otherwise the difference is the Baud Rate value itself Table 6 Deviation Interfacing mode The Mains Interfacing mode Bit 14 defines when transmitting or receiving data across the Mains if the timings are managed by ST7540 by means of CLR T line Synchronous mode or by the host Asynchronous mode In Asynchronous mode data enter directly in the FSK modulator in Transmission mode and are sent directly from the demodulator to the RxD line in Reception mode In the current software firmware re
15. the software 1 Insert the ST7538 40 Demo Board CD ROM in your PC and execute the setup exe file 2 Follow the instructions displayed by the application wizard To run the software 1 Execute the ST7538 40 PLM Demo Kit program Start Programs 55T7538 40 FSK PowerLine Modem Demo Kit 55T7538 40 FSK PowerLine Modem Demo Kit 7 44 www BDTIC com ST Installation information UM0239 1 4 1 5 8 44 Release information and boards supported This document refers to Release 3 19 of the ST7538 40 FSK PowerLine Modem Demo Kit The following Evaluation Boards are supported by the ST7538 40 FSK PowerLine Modem Demo Kit e 17538 Evaluation Board rev 2 1 8 rev 2 2 e EVALCOMMBOARD rev 1 1 EVALST7538DUAL rev 3 1 Dual Channel e EVALCOMMBOARD rev 1 1 EVALST7540 1 rev 2 1 Reference documents For more information about the EVALCOMMBOARD please refer to UM0240 User Manual Industrial Communication Board EVALCOMMBOARD For ST7538 working mode please refer to UM0241 User Manual ST7538 Power Line Modem Demokit GUI lt www BDTIC com ST UM0239 Commonly used terms 2 Commonly used terms Table 1 describes some of the commonly used terms regarding Power Line Communication and other terms used in this document Table 1 Commonly used terms Term Description Frame Check Sequence An error detection scheme that uses parity bits generated by polynomial encoding of digital signals FCS Forward Error Correcti
16. used to reset the Slave statistical data collected and no response to Master is needed After a packet transmission the Master waits for a time defined in Wait Time in Master Window the response from Slave and if a message headed for it is detected it performs the same correctness detection operation above described in order to consider the message OK or KO Repetition function To improve the reliability of communications it is possible to use the repetition function In this case if a response is not detected by Master the packet is sent again for a maximum of three times before it is definitively considered Not Acknowledged Medium access control A Medium Access Control is also implemented for both Master and Slave in order to prevent two or more devices from transmitting at the same time as described in Table 24 for the Ping Master parameters and Table 25 for Ping Slave parameters For a low level description of Ping protocol please refer to Power Line Modem Evaluation FW 33 44 www BDTIC com ST Ping sessions 7 4 Figure 19 and Figure 20 describe the Master and the Slave loops Ping session flowcharts session is in progress Figure 19 Ping master loop UM0239 respectively while a ping Ping Start V SLAVE ADD MSG NUM 0 EB Create MSG 0 5 MAC enable MAC equal to PD and Control Register set Transmit MSG 0 Y MSG NUM t
17. 1 Create MSG MSG NUM s NA YES MAC enable Wait RAND time from 1 to Max Wait Slot No 4 ms NO YES i Transmit MSG MSG NUM N Set Control Register to PD Message Acknowledged Repetition enabled and lt 3 messages transmitted YES Slave add 1 not elapsed YES Wait RAND time from 1 to Max Slave Add Slave No Wait Slot No 4 ms and Wait Time not elapsed YES NO Master Address correct NO YES YES v Calculate FCS V NO Y Ping Stop FCS calculated equal to FCS received NO YES NO Repetition enabled and lt 3 messages transmitted v Line busy and Max Wait Time not elapsed YES YES Ping Master settings MASTER ADDRESS SLAVE NUM TOT MESSAGE NUM WAIT TIME MAC MEDIUM ACCESS CONTROL MAX WAIT SLOT NR MAX WAIT TIME REPETITION Ping Master current message output data OK MESS CORR MESS KO MESS WRONG FCS MESS NO NOT ACK MESS Use FEC and calculate a new FCS Y New FCS equal to FCS of corrected message YES SLAVE ADD OK MESS Y CORR MESS l WRONG FCS MESS MSG NOT ACK Slave Add lt Slave No 3
18. 2 Toolbar controls TX SESSION PING SESSION pall RX SESSION CR ACCESS Toolbar sections are not available until the correct COM port is selected as described in Section 4 1 Selecting the COM port on page 13 11 44 www BDTIC com ST User interface UM0239 3 3 12 44 Status bar The Status Bar shows information about software firmware and about the link between PC and the Evaluation Board Figure 3 ST7540 status bar ST7540 STATUS BAR COM port Software Firmware Selected release release Link status MPA I amp PC Division ns amp Architectures IE mimm SW version 3 19 ST7540Demo ver 3 13 connected aah The left side of the Status Bar indicates the selected COM port by means of Command COM Settings menu voice The SW version field indicates the software release To the right a text string shows the device used ST7540 in this case and the the Firmware release of ST7 microcontroller equipped on IBU Communication Board The LED to the right of the Status Bar Demo Link indicates the status of communication between PC and Evaluation board If a communication error occurs bad or no response from the MCU to PC this LED turns from green to red lt www BDTIC com ST UM0239 4 4 1 x Getting started Getting started Selecting the COM port The first step required for using the PLM Demo Kit program is to select the correct COM port for communication between the P
19. 4 44 www BDTIC com ST UM0239 Figure 20 Ping slave loop Ping start I TOT RX MSG 0 TOT OK MSG 0 TOT CORR MSG 0 TOT RX MORE MSG 0 TOT WR FCS MSG 0 gt Message detected YES SLAVE ADDRESS correct YES NO MSG number 0 Calculate FCS FCS calculated equal NO to FCS received YES Message already received l Use FEC and calculate a new FCS i New FCS equal to FCS of corrected message Message already received Ping sessions Ping Slave settings SLAVE ADDRESS eMAC MEDIUM ACCESS CONTROL MAX WAIT SLOT NR MAX WAIT TIME Ping Slave Total Message Data LAST MSG REC TOT OK MSG TOT CORR MSG TOT RX MORE MSG TOT WR FCS MSG NO TOT OK MSG TOTRXMORE TOT CORR TOT WR FCS t1 MSG t 1 MSG t 1 MSG t 1 Get LAST MSG REC and create reply message YES MAC enable MAC equal to YES PD and Control d Register set Transmit to CD Baa aa message egister to NO la Wait RAND time from 1 to Max Wait Slot No 4 ms NO Line busy not elapsed YES 35 44 www BDTIC com ST Communication session examples UM0239 8 8 1 8 1 1 8 1 2 8 1 3 36 44 C
20. 5 and by a header i e Ox9B58 To mask the Header enter the corresponding hexadecimal value in the Mask textbox This feature enables the use of less than 16 bits or more than one header The Masked Header textbox displays the masked header The Data Bytes parameter selects how many bytes the MCU must transmit to the PC after a header recognition when in Frame Sync mode If frame synchronization is not required the user can switch OFF the Frame Sync feature and data are sent directly from the ST7540 to the PC Note that since the first data demodulation time is unpredictable byte synchronization is not ensured Sensitivity modes In addition to two sensitivity modes selectable through the Control Register Sensitivity Mode see Section 4 2 15 Sensitivity mode it is possible to force ST7540 sensitivity to the BU SZA www BDTIC com ST UM0239 Note Receive sessions level about 83 5 dBuVrms by selecting the Force Sens to BU Level parameter When enabled the TxD line is forced to 1 thus obtaining a lower sensitivity If synchronization software is used Control Register Header Recognition Bit 18 must be set to 0 in order to have a proper behavior of the RX session For more information see Section 4 2 11 Header recognition on page 18 Receiving data On EVALCOMMBOARD the green DL3 LED is turned on in Receive mode Two reception methods are available Reception with synchronization or Reception without syn
21. 7540 CR WRITING READING PROCEDURES WRITING READING B B Extended register Enable Read always 48 bits from ST7540 CR Bit 21 equal to 1 Last 24 bits are significant not all 0 or all 1 no 4 Syyes no yes Write 24 bits c no extended Get only functions first 24 bits available On the Control Register window click Write CTRL Register to transmit the 24 or 48 bit Control Register string to the ST7540 PLM Demo Board Click Read CTRL Register to read the contents of the Control Register string This displays the Read Control Register dialog box shown in Figure 12 Figure 12 Read CTRL Register dialog box REG ST7540 READ CR WINDOW READ REGISTER 000100110110001011010111 AA MR AE RAK AA MAA AA RAK AAE RA A MAK AAR A AA MAK AAE RAN AE MA QUA MAK AAE KA Update Ctrl Panel Es ER If no communication issues occur the Read Control Register string which is similar to the Write Control Register string displays the content of the ST7540 Control Register Note that 24 or 48 bits are read depending on parameters Extended Control Register Bit 21 and Header Recognition Bit 18 Click the Read button in the Read Control Register dialog box to perform a new reading of Control Register string values Click the Update Ctrl Panel button to update the Control Hegister parameter values with the 24 48 bits that are read Click Close to clos
22. C and the ST7538 40 PLM Demo Board and the ST7 MCU EVALCOMMBOARD Warning When running the program for the first time the user must perform a Control Register Writing operation before being able to access the other GUI sections This action is mandatory because the only communication interface available from the MCU on EVALCOMMBOARD to ST7540 is synchronous while the default Mains interface of ST7540 is asynchronous The only action that can be performed before a Control Register Writing is a Control Register Reading because Control Register Access is always synchronous Figure 4 COM selection SH ST 7538 40 FSK POWERLINE MODEM DEMO Eies Commands Help K 7 Toolbar Sire Save on Exit COM4 Once the correct COM port is selected the program starts communication with the EVALCOMMBOARD and automatically recognizes the type of device ST7538 or ST7540 on the PLM Board and the firmware revision of the ST7 microcontroller on EVALCOMMBOARD The status bar also displays this data as shown in Figure 3 If a communication problem occurs during COM selection e g if the Demo Board has not been properly connected to PC a message box appears and the user must select the device to manage see Figure 5 The user must select the ST7540 device to ensure correct program behavior see Note 7 It is possible to control a maximum of four devices from COM1 to COMA using a single Personal Computer by launching four inst
23. CONTOS ena deen ice Ex ORE WR oho ee ROOS AAR ED ORE OE PLE EEEE IHE S 11 S9T7540 Status oa EE ET EN OE N EE RE TERT 12 COM SelecllOll x ud SEA 8652 Oud Ae POR Ras e En ERAS HA SORA HORE OR EO Geen DEE DR Ee 13 Device selection and communication error during COM selection 14 Control Register WIDOOW 0x sie AKDA NP KAKO ME NR DR AAR or EED GE KA AL DERE 14 ST7540 Control Register parameter SE ES ES eee se es ee 15 Dual channel selection panel EE EE EE SS SE ee eee ee 22 E JEN PONG EE N N TE EE EE EE EE EN 22 Write control register string and parameters position ES cee eee ee eee 23 Control register writing reading procedures SS SE ESE SES ES eee 24 Read CTRL Register dialog DOX SE SE eee se ee 24 Transmission Monitor dialog box EE SE SE SE ee eens 25 Receive Monitor dialog box SEE SE SE eee mh nh 26 PING K WO OWS EE TEE tw oe ate OE ER EE MAA LANA wh eer od nat Gg 28 Ping Master dialog box eee eee een es ee 29 Ping slave WINDOW s ac oa EE RR een din drei ED EDE RE ED BAOG GALANG 31 PING MESSAGE TONMNAL s uk e ne ced hobs oo Rb HOEKE RR ER RASPER DR eee DANG Eee He A 32 Png mMasler OOD aa ET dae eo OT ER OR eS ae ees ROK 34 PING SAC loos sa EER AR teu OR EDS hee eas KA RE DEAD AE TEA MALANG NG ANA 35 Communication setup COM selection EE EE EE EE ee ee eee 36 Control Register dialog boxes after Setup 1 6 SE ESE SE SE ES ee se es ee 37 Communication without F
24. MENU BAR 2 TOOLBAR 3 STATUS BAR MPA I amp PC Division Ti IBU Applications amp Architectures Team Sf The Main Window consists of 1 A menu bar 2 A toolbar 3 A status bar The following sections provide a complete description for each component 3 1 Menu bar The Menu Bar enables the user to Select the COM port for communication with the Demo Board Modify the size of the Toolbar Save the last configuration used when exiting the program GUI View help and information about this Software and ST7538 and ST7540 devices Exit the program 10 44 www BDTIC com ST UM0239 3 2 x User interface Table 2 summarizes the list of commands available in the menu bar and their functions Table 2 Menu bar commands ewe sumea Felon Opens COM port selected and begins the COM settings communication with the Demo Board ports available from COM1 to COM4 Commands Selects the size of the toolbar small Toolbar size i medium or large On exit saves the current program sep on Exit sep Qh en 1 Settings saved refer to all controls present in the ST 7538 40 FSK PowerLine Modem Demo Kit tool Opens the 517538 PowerLine Modem ST7538 Demo kit GUI User Manual Demo Kit GUI User Manual Help Toolbar The Toolbar is used to access all sections of the program The sections available are e Receiving session e Transmission session e Control Register access e Ping session Figure
25. RE NOT SPECIFIED AS AUTOMOTIVE GRADE MAY ONLY BE USED IN AUTOMOTIVE APPLICATIONS AT USER S OWN RISK Resale of ST products with provisions different from the statements and or technical features set forth in this document shall immediately void any warranty granted by ST for the ST product or service described herein and shall not create or extend in any manner whatsoever any liability of ST ST and the ST logo are trademarks or registered trademarks of ST in various countries Information in this document supersedes and replaces all information previously supplied The ST logo is a registered trademark of STMicroelectronics All other names are the property of their respective owners 2006 STMicroelectronics All rights reserved STMicroelectronics group of companies Australia Belgium Brazil Canada China Czech Republic Finland France Germany Hong Kong India Israel Italy Japan Malaysia Malta Morocco Singapore Spain Sweden Switzerland United Kingdom United States of America www st com lt 44 44 www BDTIC com ST
26. SVV GfGe synchronization 7472616e736d697373696f6e207 7697468 20535720737 96e63687 26f6e697ab1 7469 6f6e FRAME SYNC em OR EE MM FRAME Header 0x9B58 RX JOFF Save To File RESET SCOPE CLOSE 39 44 www BDTIC com ST Communication session examples UM0239 8 4 Communication session with Hardware Frame Synchronization In this example the board connected to COM1 is used as the Transmitter while the board connected to COMS is the Receiver Five messages are transmitted across the Mains and the receiving method is synchronized by ST7540 through the Header Recognition function of the Control Register This enables incoming data from the ST7540 to arrive already synchronized to EVALCOMMBOARD and are directly sent to the PC Actions to perform on GUI connected with GOM 1 Click REG on toolbar to open the Control Register parameter dialog box Enable Extended Register Enable Header Recognition Enable Frame Length Count Set Header Length Control to 16 bits Set Frame Header Control to 9B58 hexadecimal value Set Frame Length Control to 14 hexadecimal value equal to twenty 16 bit words or 40 bytes Click Write CTRL Register 2 Click Rx on toolbar to open the Rx Monitor dialog box Set Frame Sync to OFF Set Force Sens to BU Level to OFF Click ON Actions to perform on GUI connected with COM1 1 Click Tx on toolbar to open the Tx Monitor
27. ances of the program In order to identify the instances a different window background color is used for every COM port After the COM selection the user can access all GUI sections 13 44 www BDTIC com ST Getting started UM0239 Note 4 2 14 44 1 Figure 5 Device selection and communication error during COM selection C f vr EHROM MESSAGE K DEMOBOARD MOT RESPONDING COMMUNICATION ERROR DEVICE SELECTION Communication errors can occur at any time The Device Selection message box appears if an error occurs only during the first COM selection To ensure reliable communications a link status LED is present on the Status Bar as shown in Figure 3 If an incorrect device is selected the user must close and restart the Program in order to avoid undesired behavior Setting the Control Register parameters To access to the ST7540 Control Register click the REG button on the Toolbar The main window then displays the Control Register dialog box as shown in Figure 6 Figure 6 Control Register window REG p 17540 CONTROL REGISTER WINDOW 517540 CONTROL REGISTER Baudrate Deviation Interface Watchdog J RESET 2400 0 5 SYNC d ENABLED EVENT O Detection Detection THERMAL i Method Time Figezx Output Clock w EVENT 1 Control Register Params i CARR N C 1 M 3 AMH M 1s m icamwc m tms od 3 a e o Panel MONITOR Sensitivity WR Control Register String tur Mode Pre Filter en
28. be sent in both hexadecimal and ASCII format across the Mains Click Load File to load an ASCII or HEX text file in the textbox Click Close to close the Transmission Monitor dialog box 25 44 www BDTIC com ST Receive sessions UMO239 6 26 44 Receive sessions Click RX on the toolbar to open a receiving session and to display the Receive Monitor dialog box shown in Figure 14 Figure 14 Receive Monitor dialog box ST7540 RECEPTION WINDOW RX Textboxes Hex and ASCII FRAME SYNC or Gro de reer mR o Low Sensitivity Header 9658 Mask l fiif asked 1001 1011 0101 1000 eader RX ON Save To File RESET SCOPE CLOSE Frame synchronization controls The textboxes display the content of the incoming data in hexadecimal and ASCII format respectively To clear the Hexadecimal and ASCII textboxes click Reset Scope Frame synchronization and Header data As it is not possible to know when the ST7540 starts to demodulate data incoming from the mains a Frame Synchronization feature can be enabled in order to know when the data flow begins If the Frame Synchronization feature is enabled Frame Sync toggle switch the data flow from the ST7540 is filtered from the MCU and the data is sent to the PC only when a header defined by the Header parameter is recognized This ensures that all following bytes are correctly sent to PC if the transmitted message is preceded by a preamble i e OXAAAA or 0x555
29. chronization depending on the Frame Sync parameter setting Click ON to start receiving data Click Close to stop data reception Saving data In order to save data received from the Mains in a text file in either hexadecimal or ASCII format click Save to File before clicking ON to start receiving incoming data The maximum file size allowed is 64 KBytes To stop saving data click Stop Saving Click Close to close the Receive Monitor dialog box 27 44 www BDTIC com ST Ping sessions UM0239 7 28 44 Ping sessions In order to evaluate the reliability of a communication between two or more devices a Ping session can be performed A ping session consists of a Master that sends a sequence of messages to one or more Slaves If the messages are correctly received by Slaves they are re sent to the Master enabling the application to collect a wide variety of statistical data An error correction algorithm is also included Click PING on the toolbar to open a Ping session First select Master or Slave to set the device in the desired mode and to display the corresponding dialog box shown in Figure 15 Figure 15 Ping windows Ping Master PING ST7540 PING WINDOWS aster T Ok No re u aste e S uS ron acknt ledge PING START PINGSTOP close S 3 D Statistics for ium E 1 150 PD S jax Wai fait Slot Nr Time ms eu 10 500 0 0 Ping Slave Slave Address 2 1 Set Statistical p Save Sta
30. e the Read Control Register dialog box SZA www BDTIC com ST UM0239 5 Note lt Transmission sessions Transmission sessions Click TX on the toolbar to open a transmission session and to display the Transmission Monitor dialog box shown in Figure 13 Figure 13 Transmission Monitor dialog box TX ST7540 TRANSMISSION WINDOW Hexadecimal ASCH agaaaaaSbSeiitt Sequence Continuous E 11 E TX ON i The textboxes display the content to be sent across the Mains in hexadecimal and ASCII format respectively Transmission methods Two methods of transmission are available Sequence and Continuous The Sequence method sends the content of textboxes across the Mains for selected number of times Nr parameter with a delay of 200 ms between transmissions It is important to note that each sequence transmitted is a single transmission session to ensure that no Timeout issues occur if the message to transmit is not too long The Continuous method sends the content of the textboxes repeatedly across the Mains in a single transmission until the transmission is interrupted by the user or by a Timeout event A maximum of 127 bytes can be transmitted to the MCU Transmitting data On EVALCOMMBOARD the orange DL4 LED is turned on when a transmission begins When a Timeout Event occurs the red DL2 LED is turned on Click ON to transmit the content of textboxes that represents the data to
31. ed every time a communication is performed between the software tool and the Demo Board except for the Link Monitor LED that it is activated also when the user modifies a Control Register parameter using the Control Register Parameters Panel In this case the Write Control Register String on the panel no longer corresponds to the ST7540 Control Register For this reason the Link Monitor LED is always enabled red at first run of the program Table 23 lists possible events Table 23 Summary of events Event occurs when MCU of IBU Communication Board has been reset Thermal event Event occurs when a Thermal shutdown event has occurred Event occurs when Link monitor Write Control Register String does not correspond to ST7540 Control Register A reset or a communication problem event occurs lt www BDTIC com ST UM0239 Note 4 5 Note a Getting started If a communication problem occurs a message box describing the issue appears In this case the user must try again to perform the same operation that caused the problem until no more message boxes appear and the Link Monitor LED becomes green If communication problems persist the user can reset the microcontroller on EVALCOMMBOARD by pushing the RES button After this operation a Control Register Writing or a Control Register Reading must be performed in order to avoid undesired behavior Using the Control Register String The selected parameter values o
32. eens 19 4 2 14 Extended control register 0 0 0 cee ees 19 4 2 15 Sensitivity mode ESE SE EE EE eee ee 20 4 2 16 Pre filter crn a acd oa ead auras aad ac qh ators MORE Ded ack pti NGA ded 20 2 7 www BDTIC com ST UM0239 Contents 4 2 17 Frame header 0 ccc eee ee nnn 20 4 2 18 Frame length ee eens 20 4 2 19 Limitations on Control Register parameters 21 4 3 Selecting the Dual Channel option SE ESE cee ees 21 4 4 Monitoring events SE ss SE ee eens 22 4 5 Using the Control Register String 2 0 SE EE a 23 4 6 Reading Writing Control Register parameters 24 5 Transmission sessions RR REK ER ER eee 25 6 Receive SESSIONS cick esc EDE NESER DE ME SEE HR RE RE N SI a vd 26 7 PING SESSIONS ia ae RE RE RED ee er ER cates eho IE er EER eee 28 7 1 Opening a Ping Master session SE EE SE eee eee 29 7 1 1 Ping Master parameters 0 00 cee eee 29 7 1 2 Starting a Master Ping session SE SE SE SE es 30 7 2 Opening a Ping Slave session SE EE SE es 31 7 2 1 Ping Slave parameters 000 eee eee 31 7 2 2 Starting a Slave Ping session 0 ces 32 7 3 nila eelte eie MEE EE N wane tenes Eek eh ee AR ET IE 32 7 4 Ping session flowcharts SE SE ee eens 34 8 Communication session examples 36 8 1 Setup procedure SESSE
33. eters Slave address settings Slave address Defines the Address from 1 to 255 of Slave device Medium access control settings Defines which type of medium access is used Choices are none BU or PD In the two last settings packets are sent only if respectively BU or CD PD lines are not active If PD is selected while Carrier Detection CR control is used content of Control Register is changed in order to select the detection method to Preamble detection Medium Access Control If BU or CD PD lines are actives depending on Medium Access Control Max Wait Slot Nr selected the Slave waits for a time selected randomly between 4ms and 4 Max Wait Slot Nr ms before to analyze if it is possible to transmit a packet Defines the maximum time to wait when BU or PD Medium Access control Max Wait Time are selected before to transmit the packet When the Max Wait Time is elapsed the packet is transmitted even if BU or CD PD lines are actives Last received message information Last Received Shows the number of last message received This field is updated only when Message Get statistical Data button is pressed a 31 44 www BDTIC com ST Ping sessions UM0239 Table 25 Ping slave parameters continued Statistical data display The following statistical data are collected OK messages the total number of messages properly received plus those corrected through FEC Corrected messages the n
34. f the virtual ST7540 Control Register appear in the textbox at the bottom of the Control Register dialog box Figure 10 in binary format from MSB to LSB When the user modifies or clicks one of the Control Register parameters the corresponding bits of the Control Register string become red If the Extended Register control bit is set to Enabled the second part of the Control Register string Bits 47 to 24 becomes active and the extended functions are available Figure 10 Write control register string and parameters position REG CONTROL REGISTER STRING Sensitivity Header Rec Det Method 22 18 12 13 Watchdog 6 imag L igra g wr d Ss MSE CSD Bits 23 U IUUU TUTU DIE JU Bits 47 24 JU h e Pre filter Frame Count S Mains interface S Tx Time Out z Carrier 23 z 19 a 14 B 0 2 Frequency 0 2 r n Header Length Extended Output Voltage Not Used 11 Deviation 5 Frame Header 40 47 Reg 21 Freeze 17 24 39 When the Extended Register control bit bit 21 is set to Enabled the ST7540 accepts 24 or 48 bit CR strings The ST7538 40 FSK Power Line Modem Demo Kit always writes 48 bits when this bit is enabled 23 44 www BDTIC com ST Getting started UM0239 4 6 24 44 Reading Writing Control Register parameters Figure 11 summarizes the Control Register reading writing procedures with the PLM Demo Board Figure 11 Control register writing reading procedures reg ST
35. g the path and the name of the text file in this case Ping session nr 1 Slave txt Figure 27 Ping master session and save statistics Ping Master Save Statistics As Slave Description 3 s Ad C Documents and Settings X Save Statistics Salva in a Documents and Settings Ka Ci E3 Administrator E eusdadmin Display Statistics for Slave No Emile Saccani Salva come Em lt Annulla PING START PING STOP Figure 28 Ping slave session and save statistics Save Statistics As ae C Documents and Settings Salva in e Documents and Settings x da ci Ea ijj Administrator Sy eusdadmin AI Users D aot hponsite O aotsweepupd Default User Emile Saccani Nome file tat Sala Salva come Pba lt Annulla a www BDTIC com ST UM0239 Revision history 9 Revision history Table 26 Revision history om Mein ewe 24 Jul 2006 Initial release ky 43 44 www BDTIC com ST UM0239 Please Read Carefully Information in this document is provided solely in connection with ST products STMicroelectronics NV and its subsidiaries ST reserve the right to make changes corrections modifications or improvements to this document and the products and services described herein at any time without notice All ST products are sold pursuant to ST s terms and conditions of sale Purchasers are solely responsible for the choice
36. imitation Only Synchronous Mains interface mode is supported by SW Output Voltage Freeze HW limitation Available only if Extended Control Register Bit is enabled Header Recognition HW limitation Available only if Extended Control Register Bit is enabled Selecting the Dual Channel option Certain ST7540 PLM Demo Boards have the ability to select the central frequency of external coupling filter between two operating frequencies In order to activate this function the user must select the DUAL CH check box in the Dual Channel selection pane set the correct frequencies for each of the two channels When Dual Channel function is enabled a command of channel selection is transmitted each time the user pushes the Write Control Register button When the Dual Channel feature is enabled the Control Register is programmed according to the selected Dual Channel frequency a PLM Eval Boards that support the Dual Channel feature have the suffix DUAL i e EVALST7540DUAL Rev X X 21 44 www BDTIC com ST Getting started UM0239 4 4 22 44 Figure 8 Dual channel selection panel kes ST7540 DUAL CHANNEL SELECTION PANEL Monitoring events By means of Events Panel LEDs it is possible to monitor the status of the Demo Board The LEDs represent events occurred during the working session Figure 9 Events panel REG EVENTS PANEL gt RESET EVENT l THERMAL 2 EVENT LINK MONITOR The LEDs are updat
37. ing this time one or more bits can be lost For this reason if a sequence of bits that starts like 1010 1010 1010 1010 OXAAAA in hexadecimal is transmitted the receiver can only demodulate with correct timings a part of this sequence For example if the first 10101 is lost the PC will receive the sequence 0101 0101 010 or 0x55 in hexadecimal So even if all bits are correct byte synchronization is lost Figure 24 shows an example of timing diagram for a baud rate of 2400 Figure 24 Demodulation timings for RX with preamble detection 62400 baud bit time 0 417ms sn 0 1 0110 1 0 1 Jo INTERNAL SIGNALS X s aie i PLL lock in variable PLL LOCK IN preamble detected am eum eum emm am CD PD detection time 1ms CD PD Be Sea an EXTERNA SIGNALS RxD NOT ACTIVE RxD ACTIVE no 0 1 0 38 44 www BDTIC com ST UM0239 8 3 a Communication session examples Communication session with Frame Synchronization In this example the board connected to COM1 is the Transmitter while the board connected to COMG is the Receiver Five messages are transmitted across the Mains and the receiving method includes Frame Synchronization so incoming data from ST7540 are supervised by the microcontroller on EVALCOMMBOARD and only the bits that follow the sequence Ox9B58 1001 1011 0101 1000 are sent to the PC Actions to perform on GUI connected with COM3 Click Rx on toolba
38. ion information EE lt lt e e EE ER ER ER ER ER EER EE RE RE 6 1 1 Software license agreement SEE SE SE tees 6 1 2 System requirements ESE SE SE SS eee es ee 7 1 3 Installing the software ccc ee ees 7 1 4 Release information and boards supported 8 1 9 Relerence GOCUMENIS cscacsecucedehutaccastawnaeseereaeaneneae 8 2 Commonly used terms e lt lt lt EE EE ER es 9 3 User Inierlac ae ie ce a ae AN ek CO R3 E 10 3 1 MONU 32389 AR EE EE APA 10 3 2 o TrT 11 3 3 viu QC M RA ON OE RR EE RE EE EE EE EG 12 4 Gelling E Tv Le se ea EERDER RE AA 13 4 1 Selecting the COM port 0 0 0 ce eee 13 4 2 Setting the Control Register parameters 14 4 2 1 Carrier Frequency 0 0 ccc eee eee ee eens 15 4 2 2 Eddie ia eee baa Berg oak aw bh aon eee A GER ae GN aA 16 4 2 3 DEVIAN soaa N EE pon woe N Oe deos 16 4 2 4 Interfacing mode 1 ee eee eee 16 4 2 5 ene ele P T mRm 17 4 2 6 Transmission timeout anana SE SE ES SE eee 17 4 2 7 WETECION MCINOG lt ciccecatecenedeugcacuts KA he EER AR AAR d 17 4 2 8 Frequency detection time 0 cece eee eee 18 4 2 9 Output voltage freeze eens 18 4210 QUPUCIOCK ske xem prre NO RE PSP SEER EE ANT Dee gees O 18 4 2 11 Header recognition 0 cc eens 18 4 2 12 Frame length count 0 0 ce ees 19 4 2 13 Headerlength 0 ccc ee
39. lease only Synchronous interfacing mode is available Due to the fact that Asynchronous Mains interfacing mode is the ST7540 default value the user must write at least once to the CR in Synchronous interface mode before the GUI will perform any other action except CR reading Table 7 Mains interfacing mode OB Asynchronous default www BDTIC com ST UM0239 Getting started 4 2 5 Note 4 2 6 4 2 7 x Watchdog The Watchdog parameter Bit 6 enables the Watchdog function that generates an internal and external reset when the internal Watchdog timer expires The Watchdog timer is reset by applying a negative pulse on pin WD The ST7 MCU Firmware on EVALCOMMBOARD automatically provides the Watchdog Timer Reset Table 8 Watchdog Bite Value sec Disabled 1 5 default Transmission timeout The Transmission Timeout parameter Bits 8 7 defines the maximum time of continuous transmission before a Timeout event occurs In this case the transmission is interrupted and the device is set in RX mode Table 9 Transmission timeout Bits mag 7 Value sec Bits 8 7 Value sec Detection method The Detection method Bits 13 12 defines the way the modem notifies the presence of a carrier CD or preamble PD through the ST7540 CD PD pin If the Carrier detection method is selected the CD PD line becomes active when a signal with a harmonic component close to the programmed Car
40. low during RxD and CLR T activation If the Frame Length Count parameter is disabled the header recognition is signaled by forcing down the CD PD line for one CLR T line period while lines RxD and CLR T are always active This function is available only if the Extended Control Register parameter Bit 21 is enabled Table 15 Frame Length Count le Disabled default Header length The Header Length parameter Bit 20 is related to Header Recognition function and defines the length of the header to recognize 8 or 16 bits If an 8 bit header is selected two headers can be used since the Frame Header parameter Bits 39 24 consists of 16 bits This function is available only if the Extended Control Register parameter Bit 21 is enabled Table 16 Header Length GEE 16 bits default Extended control register The Extended Control Register parameter Bit 21 enables the extended functions Output Voltage Freeze and Header Recognition If enabled 24 or 48 bits can be transmitted to the ST7540 the software always transmits 48 bits when enabled 19 44 www BDTIC com ST Getting started UM0239 4 2 15 4 2 16 4 2 17 4 2 18 20 44 Table 17 Extended control register EE Disabled default Sensitivity mode The Sensitivity Mode parameter Bit 22 defines the low threshold for the FSK demodulator block Table 18 Sensitivity mode Normal Sensitivity 500 uVrms default High Sensitivity
41. ommunication session examples This sections provides examples of some of the most common operations that can be performed with two or more Demo Boards The operations performed are Communication session without Frame Synchronization Communication session with Software Frame Synchronization Communication session with ST7540 Frame Synchronization Ping session Setup procedure Required hardware The following hardware is required for these example sessions e Two EVALCOMMBOARD rev 1 1 EVALST7540 1 rev 2 1 76 kHz e One PC with two RS 232 ports Hardware setup The setup of the communication sessions is common for all tests 1 Connect the PLM Demo Boards to the EVALCOMMBOARDS 2 Connect the boards to the two RS 232 PC ports through the serial cables to the PC 3 Link the PLM Boards to an isolated 110 220V Mains voltage 4 Finally reset the two EVALCOMMBOARDs by pressing the Reset button Software setup To control two devices at the same time the user must run two sessions of the program 1 Open Start Programs ST7538 40 FSK Power Line Modem Demo Kit and click ST7538 40 FSK Power Line Modem Demo Kit 2 Then select the correspondent COM available for every session in this example COM for the first board and COM3B for the second board enabling the GUI to communicate with each EVAL Board Figure 21 Communication setup COM selection COM port selection TOOLBAR enabled STATUS BAR update MPA
42. on A system of error control for data transmission wherein the receiving device has the capability to detect and correct any character or code block FEC that contains less than a predetermined number of symbols in error FEC is accomplished by adding bits to each transmitted character or code block using a predetermined algorithm Medium Access Control A service feature or technique used to permit or deny use of a communication medium Mains The electrical network that supplies homes and businesses with power Program that measures the time elapsed between the transmission of multiple packets to a remote device and the return to origin real meaning In this document the term ping is used to describe a packet exchange process between a Master device and one or more Slave devices collecting statistical data about the integrity of packets PLC Power Line Communication Communication performed between two or more nodes of the electrical network Power Line Modem A device able to transmit and receive information across the electrical network To ensure reliability of communication digital data are transformed Ping PLM modulating a carrier signal in transmission and demodulating such a carrier in reception x 9 44 www BDTIC com ST User interface UM0239 3 User interface Figure 1 shows the main window of the ST7538 40 FSK PowerLine Modem Demo Kit program Figure 1 Main window T PROGRAM SECTIONS 1
43. r of messages are numbered from O to Nr of Messages Message O is used only to reset Slave statistical data Repetition can be used to improve reliability of communication When enable if Repetition control a message is not Acknowledged it is sent until three times before to consider it not Acknowledged Ping Wait Time and Message Number settings Defines the maximum wait time to obtain a valid response with a valid address from Slave device before considering not Acknowledged the message The minimum value that can be selected depends on baud rate selected according the round trip time of message transmitted Defines the number of last message sent It goes from 0 to Nr of Messages Messages sent ni and it is updated at every new message sent Wait time x 29 44 www BDTIC com ST Ping sessions UM0239 7 1 2 30 44 Table 24 Ping master parameters continued Parameter Description Medium access control settings Defines which type of medium access is used Choices are none BU or PD In the two last settings packets are sent only if respectively BU or CD PD lines are not active If PD is selected while Carrier Detection CR control is used content of Control Register is changed in order to select the detection method to Preamble detection Medium access control lf BU or CD PD lines are actives depending on Medium Access Control Max wait slot nr selected the
44. r more Slave devices All the packets contain the following information Preamble OxAAAAAAAA 4 bytes e Header 0x9B58 for Master packets and OxE958 for Slave packets 2 bytes To improve reliability of communications a FEC algorithm and one redundant byte is used for each of the following bytes of information e Receiver Address 1 byte 1 byte for FEC e Transmitter Address 1 byte 1 byte for FEC e Current Message number 3 bytes 3 bytes for FEC e Repetition 0x00 0x01 0x02 if the same message has been transmitted once two or three times 1 byte 1 byte for FEC e FCS field obtained through a calculation of 12 previous bytes 2 bytes 2 byte for FEC The Slave detects through the Receiver Address field if the packet is headed for it or not If the message is directed to it a FCS operation is performed on 12 bytes following the preamble and the header The result of calculation is compared with FCS field transmitted from Master If the two values differ an attempt of correction is executed through FEC correction code and a new comparison is performed If the two FCS fields match the message is considered OK from Slave and it is resent to the Master inverting Master Address with Slave Address and recalculating FEC and FCS bytes Otherwise the message is considered KO and no response is performed An exception occurs when Master transmits the message zero with Message Number field 0x000000 This message is
45. r to open the Rx Monitor dialog box Set FRAME SYNC to ON Write 9B58 in Header textbox and FFFF in Mask textbox Set Data Bytes to 36 Click ON Actions to perform on GUI connected with COM1 1 Click Tx on toolbar to open the Tx Monitor dialog box 2 Write the preamble AAAAAAAA in the hexadecimal textbox 3 Add the header 9B58 in the hexadecimal textbox 4 Add the text string transmission with SW synchronization length 36 bytes in the ASCII textbox 5 Select Sequence Mode and set Nr to 5 6 Click ON Five messages are transmitted Mr se O NO Se Using the Frame Synchronization feature the user ensures that the transmitted bytes always arrive synchronized to the PC as shown in Figure 25 Figure 25 Communication with Frame Synchronization example COM 1 COM 3 RX MONITOR Hexadecimal ASCH Hexadecimal ASCII aaaaa 616e736d69 4 jexextransmission with SW sync 4 BfBe transmission with SW 4 737369b199p0 7 0974682053572 hronization 7472616e7360697373696f6e2077697468 synchronization 073796eb3p872bfbeb97a61 7469 2053572073796e6368726f6e697a617469 transmission with SW f6 BfBe synchronization 7A72616e736d697373696fBe2077697468 transmission with SW 4 20535720737 96e63687 26f6e697ab1 7469 izati synchronization 4 v Sequende 6f6e transmission with SVV Contre s 2 5 A TX OFF 7472616e736d697373696f6e207 7697468 synchronization 20535720737 96e63687 26f6e697a61 7469 transmission with
46. rame Synchronization example 38 Demodulation timings for RX with preamble detection 2400 baud 38 Communication with Frame Synchronization example 39 Communication with Hardware Frame Synchronization ce eee Ee se 41 Ping master session and save statistics ES SE SE ees 42 Ping slave session and save statistics EE SE ES eens 42 5 44 www BDTIC com ST Installation information UM0239 1 1 6 44 Installation information Software license agreement 1 Important Before loading this software you have to carefully read and agree to the following terms and conditions which will be then automatically agreed on by loading this Software or any portion thereof If you do not agree to the terms of this Agreement do not install or use anyhow this software or any portion thereof 2 License grant ST grants you a non exclusive royalty free worldwide license to this software written for ST products Software You shall have the right to use copy modify and distribute the Software with ST products only All ST Software will be required to contain the ST Copyright notice which shall not be removed therefrom for any reason You acknowledge that the Software is not designed nor is authorized for use in life supporting devices or systems 3 Ownership and copyright of software Title to the Software and all copies thereof remain with ST The Software
47. rier Frequency is detected on the RAI pin If the Preamble detection method is selected the CD PD line becomes active when a signal with a carrier modulated at the programmed Baud Rate for at least 4 consecutive symbols 1010 or 0101 is detected on the RAI pin If the Detection method is conditioned CLR T and RxD signals are enable only when CD PD line is enable otherwise CLR T and RxD are always enabled Table 10 Detection method Preamble detection without Carrier detection without maet 10 va conditioning conditioning default 01 iiu gaal 11 Carrier detection with conditioning conditioning 17 44 www BDTIC com ST Getting started UM0239 4 2 8 4 2 9 4 2 10 4 2 11 Note 18 44 Frequency detection time This parameter Bits 10 9 defines the time within which a carrier must be detected across the Mains before signalling it on ST7540 CD PD pin If the Preamble Detection method is selected the CD PD becomes active only if also a preamble is detected For more information see Section 4 2 7 Detection method Table 11 Frequency detection time Bits 10 9 Value msec Bits 10 9 Value msec 09 EE eau Output voltage freeze The Output Voltage Freeze parameter Bit 17 turns off the Voltage Control Loop once the ALC remains in a steady condition for about 3 control loop periods and maintains a stable condition until the end of transmission This function is available only if the Extended Cont
48. rights thereto are granted hereunder or constitute an agreement to bring or prosecute actions or suits against third parties for infringements or confer any right upon a party to use in advertising publicity or other medium any name trademark or trade name or any other contraction abbreviation or simulation thereto of the other party or confer by implication estoppel or otherwise upon you any license or other right under any and all IPR except the licenses and rights expressly granted hereunder to you In no event shall ST be liable for any damages whatsoever including without limitation damages for loss of business revenue or profits business interruption loss of business information or other pecuniary loss arising out of the use of or the inability to use the Software as part of an ST application ST does not assume any responsibility for any errors that may appear in the Software nor any responsibility to support or update the Software ST SZA www BDTIC com ST UM0239 1 2 1 3 lt Installation information retains the right to make changes to the Software and its test specifications at any time without notice 5 Entire agreement This Agreement constitutes the entire agreement with ST and supersedes any prior or contemporaneous oral or written agreements with respect to the subject matter of this Agreement 6 Support Under this Agreement ST is under no obligation to assist in the use of the Software to provide
49. rol Register parameter Bit 21 is enabled Table 12 Output voltage freeze 0 __ Enabled Disabled default Output clock The Output Clock parameter Bits 16 15 sets the ST7540 MCLK line frequency as a sub multiple of the 16 MHz oscillator frequency or disables the output clock Table 13 Output clock Bits 16 15 Value MHz Bits 16 15 Value MHz Ca fw AG Header recognition The Header Recognition parameter Bit 18 enables the hardware recognition of one or more headers one 16 bit header or two 8 bit headers depending on the Header Length parameter setting Header recognition is signaled by the CD PD line in different ways depending on Frame Length Count bit 19 If synchronization software is used this parameter must be disabled to ensure the correct behavior of RX sessions This function is available only if the Extended Control Register parameter Bit 21 is enabled a www BDTIC com ST UM0239 4 2 12 4 2 13 4 2 14 lt Getting started Table 14 Header recognition Ls Disabled default Frame length count Frame Length Count parameter Bit 19 is related to the Header Recognition function If enabled receiving data are put on RxD line and CLR T becomes active only after a header recognition and only for the number of 16 bit data words indicated by the Frame Length parameter Bits 47 40 Header Recognition is signaled to the host through the CD PD line that is held
50. t NORMAL OFF Events Panel Write CR Button Read CR Button Extended Reg Frer DISABLED ESR ng MSB CONTROL REGISTER LSB Dom a ON 000100110010001011010111 O Bits 23 0 000010101001101101011000 P Bits a 22 Dual channel selection This dialog box enables the user to modify the Control Register parameters Certain parameters may only be modified by enabling the Extended Control Register bit of the Control Register For more information about the Extended Control Register bit see Section 4 2 14 Extended control register on page 19 a www BDTIC com ST UM0239 Getting started Note 4 2 1 7 Figure 7 ST7540 Control Register parameters Ss MEG ASIANS REGISTER PARAMETER EE lwat a325 kHz ES EIN 2400 m CNN OK SYNC d NABLED J ARR N C A Ta IGABLED SL am gt OISABLED DISABLED IM 16 bits ONORMAL ONE This section describes each of the Control Register parameters Table 3 provides a summary of each parameter bit by bit as appears in the Control Register string in binary format from MSB to LSB Table 3 Summary of Control Register parameters IE GR NE ee DNE wmm fo hemerin 0 wu jowama 1 Available only when Extended Control Register is enabled Default values listed in this section refer to the ST7540 Power Line Transceiver Carrier Frequency The Carrier Frequency parameter Bits 2 0 defines at which center frequency
51. tistics OK Corre e than Slave Medium Access Control Max Max Wait Wait Slot Nr Time ms 10 1000 PING STOP CLOSE lt www BDTIC com ST UM0239 Ping sessions 7 1 Opening a Ping Master session 7 1 1 Ping Master parameters As shown in Figure 16 lable 24 following parameters can be selected for the Master device and the ping session Figure 16 Ping Master dialog box PING ST7540 PING MASTER WINDOW Master Nr of Nr of MESSAGE Address Slave Addresses Messages Slave Description SETTINGS Ji 1 1 3 1000 Repetition Control DISABLED v al PING WAIT Display Statistics for TIME amp MSG Medium Access Control Slave No NUMBER Ji Max Max Wait Wait Slot Nr Time ms io 3 500 96 Messages OK Messages STATISTICAL MEDIUM ACCESS corrected through INFORMATION CONTROL See SETTINGS OK Corrected Current Message Status CURRENT KO MESSAGE EER D OF OD D oo INFORMATIONS 1 Ok NoAck Sng Woe Wrong FCS Not ACK g Messages with Messages not EXECUTE STOP rr Wrong FCS acknowledged PING START PR TOE BUTTONS ancestor sos Table 24 Ping master parameters Message settings Defines the Address from 1 to 255 of the Master device Defines the Number from 1 to 255 of Slave devices Slave Addresses start from 1 to Nr of Slave Addresses Defines the total number of messages to send to Slave devices The messages N
52. umber of messages corrected through FEC RX more than once the number of messages received more than once KO messages the number of message not received Wrong FCS messages the number of messages with incorrect FCS even after correction Not RX messages the number of message not received calculated by subtracting the number of total message received both the correct and the incorrect ones from the number of last message received Last Received Message field Click Get Statistical Data to update statistical data Click Save Statistics to store collected data in a text file 7 2 2 Starting a Slave Ping session Click Ping Start to start the ping session and enable the reception of data Click Ping Stop to end the ping session Click Close to close the Ping Slave dialog box 7 3 Ping protocol The Ping session consists of an exchange of packets between one Master device and one or more Slave devices Figure 18 shows the ping message exchange format Figure 18 Ping message format PING ST7540 PING MESSAGE FORMAT INOPGODED receiver transmitter repetition FCS field Field Address Address ACT EE ad 22 bytes CODED Byte nr 6 1 1 1 1 1 1 1 1 Field preamble header Nu FEG 8n BEG FEC FEC FEC P EEG E FEC FEC lt 32 44 www BDTIC com ST UM0239 Note x Ping sessions When the user clicks PING START the session begins and the Master sends a series of packets to one o
53. you support of the Software or to provide maintenance correction modification enhancement or upgrades to the Software Any action taken by ST in this respect will be unilaterally taken and subject only to ST assessment without any notice to you Any such action shall be considered as Software and will automatically be subject to this Agreement 7 Termination of this license ST is entitled to terminate this Software License Agreement at any time if you are in breach of any of the terms of this Agreement Upon termination you will immediately destroy the Software 8 Export regulations You undertake to comply with all applicable laws regulations decrees and ordinances related to your use of the Software 9 Applicable laws Any dispute arising out of or in connection with this Agreement which could not be amicably settled shall be finally settled under the Rules of Conciliation and Arbitration of the international Chamber of Commerce by one or more arbitrators appointed in accordance with the said Rules which the Parties know and elect irrevocably Such arbitration shall take place in Paris and be held in English System requirements A Personal Computer PC including e oneor more RS 232 serial ports a CD ROM reader a Hard Disk with at least 20 MBytes of free space Screen resolution 800x600 or higher Operating System Windows NT 2000 XP Adobe Acrobat Reader release 4 0 or more recent Installing the software To install
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