User Manual for Development System MICRF505
Contents
1. 1 OFF OFF ON OFF Master 2 OFF OFF ON ON Slave Make sure one board is master and one is slave This mode of operation has a similar functionality as Simple Byte Transfer Mode in addition some advanced features are included described below Error detection CRC 16 bit is implemented Stop and wait ARQ packets being acknowledged or re transmitted is implemented This means A source Master or slave sends a frame to a destination master or slave The frame must be ack ed by the destination or else the source will retransmit the frame If the source is Slave it will give up transmitting after approximately 10 seconds the time out for no sync info from master If the source is Master it will not quit until DIP switches are changed or the board is powered off Duplicate control is implemented If the frame ID of a data frame is equal to the last received frame ID the frame is identified as a duplicate The frame is ack ed but no data is given to user since the user already has received it Note After power on the boards establish contact get synchronised The master board keeps the boards in synch by transmitting a timestamp every 4 seconds approximately If the slave does not get a timestamp for 10 seconds approximately it starts to transmit timestamp requests In Advanced Byte Transfer Mode LED3 is set on when a message is transmitted and LED4 i2. If not overruled from the PC program all pre programmed frequencies are used refer to RF Test Mode Enable configuration via PC Automatic hopping between the frequencies is implemented For the MICRF505 MICRF600 Made to meet the FCC part 15 247 regulations If lt 25 frequencies are pre programmed The frequency table still holds 25 entries That is several frequency indexes points to the same frequency Refer to Introduction In this mode of operation a message is ping pong ed between the boards The message is build of 5 printable ascii characters e A letter a y indicating the frequency index for the frequency used not the frequency number but the index in a look up table e 2 letters BC e m or s if the message is sent form a master or a slave resp e carriage return 0x0D Combination 1 Master The following procedure is implemented for a 2 Way Link Test Master LOOP Enter transmit mode on frequency n Transmit Message and CRC checksum Enter receive mode on frequency n Search for ack Ack Message If ack found LED1 on If no ack for 5 attempts LED1 off Use next frequency randomly selected next time END_LOOP CRC 16 bits is used LEDI will go on if an ack is received and will go off if no ack is received during 5 attempts Note If LED1 at Master is ON it indicates 2 way communication OK because e Master has to tr
3. DIP1 DIP2 DIP3 DIP4 Text 1 ON ON OFF OFF Receive mode only 2 ON ON OFF ON Transmit 1010 3 ON ON ON OFF Transmit carrier 4 ON ON ON ON Enable configuration via PC 5 OFF ON OFF OFF Bypass micro controller 6 OFF ON OFF ON Transmit a random pattern Combination 1 Receive mode only The board will continuously search for a 1010 pattern The board utilizes the on board bit synchronizer feature of the MICRF50X Ifa 1010 pattern is received LED1 will be on If an error in the 1010 pattern is detected LED1 will be off for at least 1 2 second The LED 1 off time is set to 1 2 second to let the user visually observe an error The received data is also clocked out directly to a header DATACLK and DATAIXO are available at the header close to the antenna side Test points in header Pin 8 is the one near the antenna side Micrel Norway Oslo Norway 8 Gnd 7 CS Chip Select 6 SCLK Programming clock line 5 IO Programming data line 4 RSSI Received signal strength indicator analogue level 3 LD Lock detect 2 DATACLK Data clock 1 DATAIXO Data input output MICRFXXX User Manual for Development System FW v 4 Combination 2 Transmit 1010 The board will enter transmit mode and transmit a 1010 pattern This can be combined with Combination 1 Receive mode to test range and error rate Combination 2 can be used to te
4. MICRF505 and MICRF506 transceivers products in the RadioWire product line Please refer to the appropriate data sheet For the latest updates on products related to RadioWire please visit www micrel com Development system for MICRF505 The MICRF505 chip is used MICRF506 The MICRF506 chip is used MICRF600 RF module with MICRF505 on board for 915MHz band MICRF610 RF module with MICRF505 on board for 868MHz band MICRF620 RF module with MICRF506 on board for 433 92MHz band The operation and features of the development system are equal for all parts The main differences are the frequency band the RF modulation the on the air bit rate and number of frequency channels Dev System Frequency Modulation On the air Manchester Number of band bitrate coded frequencies bps VCO mod VCO mod MICRF600 915MHz Modulation 19231 No using 2 sets of dividers using 2 sets of dividers MICRF620 433 92MHz Modulation 19231 No 4 using 2 sets of dividers Note that all systems have the same firmware version number and all source files are available in a common set of files a Project Micrel Norway Oslo Norway 2 MICRFXXX User Manual for Development System FW v 4 Outline of this document Following this introduction an overview of the board s inputs outputs is given Then a Get started chapter is included and the different modes of operation are described An overview of how to program update t
5. and bit rate Enter values and press the Calc button To see the resulting control word fields press the See Details button this opens the Complete Setup window o Select Complete Setup to enter the control word fields manually Press the Calc button to see resulting frequencies etc Press More Info button to get more information o Note that the complete resulting control word can be found in RF TestBench gt Overview Micrel Norway Oslo Norway 18 MICRFXXX User Manual for Development System FW v 4 o If both Complete and Quick windows are open Changes in one window are reflected in the other e To transfer a control word to the development board from Quick Setup or Complete Setup Enter change the fields and press Transfer The entered values are stored in the micro s EEPROM e Observe the Status field If Success is not displayed please check connections power and try again In the following some suggestions are made for the user to get familiar with RF TestBench e Experiment with e g power levels Suggestion Change power level press Transfer and then give a TX1010 command Observe the result on a spectrum analyser or use the other board in the RX RF test mode and observe change in range distance between transmitter and receiver e Try to give a Transmit 1010 command RF TestBench gt Development Board Co
6. for Development System FW v 4 Example how to use Simple Byte Transfer Mode User A connected to board A wants to transfer 6 bytes Hello User B connected to board B receives the bytes User A e Test if CTS at board A is active If CTS is active the board is ready to accept bytes from the user e Transfer Hello into the board using 9600 8 N 1 Transfer Isb of every byte first after the start bit Board A e Read bytes from User A Format a packet to transmit 1 6 bytes of Hello Enter transmit mode Transmit the packet using Manchester encoding Enter Receive mode e If more bytes entered by user Format a new packet and transmit it Board B e Receive a packet e Un pack the bytes from the packet e Test that the number of bytes is a legal number of bytes 1 64 e Test that CRC is OK e Test if RTS is active If RTS is active the user is ready to accept bytes from the board e Transfer the bytes to User B Transfer Isb of every byte first User B Read bytes from board Note Since no addressing is used other users let s say User C User D and User E will receive the 6 bytes as well If the boards are used in a network the message has to include some address information and the user s protocol has to handle it Micrel Norway Oslo Norway 15 MICRFXXX User Manual for Development System FW v 4 8 Advanced Byte Transfer Mode DIP switch setting Combin DIP1 DIP2 DIP3 DIP4 Text
7. or get the frequency dividers for a number of frequencies RE TestBench should be self explaining refer to the user guide for the PC program as well Installation and running are straightforward e Copy the files into a separate directory e Change filenames from eee to exe 2 files and from bbb to bat 1 file e Start the program by double clicking PCxx bat xx sw version number If using RF TestBench together with a development board Make sure the DIP switches are set like this Combin DIP1 DIP2 DIP3 DIP4 Text 1 ON ON ON ON Using RF TestBench e Power on the board e Connect the development board to a PC via a cable o 1 1 RS232 cable o Make sure RTS CTS TX RX and GND are included in the cable pins 2 3 5 7 8 o Note Power on the board before connecting the cable to the board if the power LEDs do not get on e Start RF TestBench by double clicking PCxx bat xx sw version number e Read the welcome message e From the main menu select serial port COM1 or COM2 via Setup gt Communication port e From the main menu select device from Setup Select MICRF505 506 600 610 or 620 e From the main menu select RF TestBench gt Quick Setup or gt Complete Setup o Select Quick Setup if you want the program to calculate parameters based on basic parameters like xtal frequency RF frequency
8. 600 25 frequencies f0 903 25MHz f1 924 25MHz f24 927 25MHz e MICRF610 2 frequencies fO 868 307692MHz f1 868 952381MHz e MICRF620 4 frequencies f0 433 4MHz f1 433 7MHz f2 434 0MHz f3 434 3 MHz Default frequency used in RF test mode and Simple byte transfer mode e MICRF505 915 00MHz MICRF506 433 4MHz MICRF600 915 25MHz MICRF610 868 307692MHz MICRF620 433 4MHz Automatic hopping e In 2 way Link Test Mode and Advanced Byte Transfer Mode Development boards jump to a new frequency channel approx 10 times sec Channels are used randomly Flash based micro controller PIC18LF4320 for easy firmware upgrade testing Plug directly into ICD2 from Microchip Antenna External antenna User interface Asynchronous serial interface RS232 level or logic level I O pins 9600 8 N 1 4 DIP switches to select mode of operation 1 LED to indicate power on 1 LED to indicate RF powered 4 LEDs to indicate status or control information Possible to use 5 external I O pins for user FW development Possible to monitor the interface between RF chip and micro controller via header pins Possible to measure RF part power consumption Power supply 6 9 volt DC Apply to the centre pin note External antenna connector Type SMA Micrel Norway Oslo Norway MICRFXXX User Manual for Development System FW v 4 2 Development Board Inputs Qutputs Please observe The MICRF505 or 506 600 610
9. 600 Number of databits 8 Parity None Number of stopbits 1 Handshake RTS CTS The interface works as follows Note that active state of RTS and CTS is low a logical 0 seen by the micro controller RTS is an output from DTE the user It is used to control data flow from DCE the board to DTE DTE brings RTS active to signal DTE ready for data bytes from DCE DTE brings RTS inactive to signal DTE not ready for data bytes from DCE Before DCE outputs bytes to DTE the RTS line is tested If RTS is active DCE knows that DTE is ready to receive bytes and DCE transfer the bytes on the RXD line CTS is an input to the DTE It is used to control data flow from DTE to DCE DCE brings CTS active to signal DCE ready for bytes from DTE DCE brings CTS inactive to signal DCE not ready for bytes from DTE Before DTE outputs bytes to DCE the CTS line is tested If CTS is active DTE knows that DCE is ready to receive bytes and DTE transfer the bytes on the TXD line Micrel Norway Oslo Norway 13 MICRFXXX User Manual for Development System FW v 4 Maximum number of bytes to transmit in one data frame is 64 bytes The board will tell user to stop enter bytes by setting CTS inactive when the bytes from user buffer holds 64 bytes Note the board can buffer 2 additional bytes Other bytes will be lost The bytes can be entered with random delay between them As soon as a byte is entered t
10. F Test Modes OFF OFF RF Test Rx OFF ON RF Test Tx1010 ON OFF RF Test TxCarrier ON ON Enable Configuration via PC Micrel Norway Oslo Norway MICRFXXX User Manual for Development System FW v 4 3 Getting Started Before power up of the development board e Get familiar with the inputs outputs refer to Development Board Inputs Outputs e Select mode of operation via DIP switches e If Byte Transfer Mode Simple or Advanced is selected Select interface Insert the 4 jumpers DTE_RTS DTE_CTS DTE_RX DTE TX to select RS232 interface Remove the jumpers to select logic level interface connect to e g another micro controller To get familiar with the boards the following sequence is suggested First try the 2 way Link Test Mode On one board set only DIP1 ON This will be the Master On the other board Set DIP1 and DIP4 ON This will be the Slave Try to increase decrease the distance between the boards and observe LED 1 at the boards If LED1 at the Master is on A 2 way link is established from Master to Slave and back to Master LED1 at the Slave will be on as long as the link from Master to Slave is OK Then try the RF Test Mode Set one board to transmit 1010 DIP1 DIP2 and DIP4 ON and another board to receive DIP1 and DIP2 ON Observe LED1 on the receiving board indicates received 1010 OK Optionally use an oscilloscope to observe the DATACLK an
11. User Manual for Development System MICRF 505 MICRF 506 MICRF 600 MICRF610 MICRF620 FW v 4 Micrel Norway AS Strandveien 13 1366 LYSAKER Norway Tel 47 67 83 08 00 Fax 47 67 83 08 10 MICRFXXX User Manual for Development System FW v 4 Table of contents Le Untroducuon c cicteniacsiie aetna ee ie Randi eh 2 2 Development Board Inputs Outputs s c 0c8 isc cos Gaeceahs bacon docdiglasecoae cess 5 2 1 Summary of DIP Switch Setting 2 18 cisc ence depen nde eee 6 5 WCU ATU RR 7 42 RF Test Modes nuits esita e ria a i e a 8 5 2 way Link Test Mod sunuimsimnunnganmnenagdansnanstatsssinlektminusien 11 6 Interface in Byte Transfer Modes sseeseeseseseesesseesresreesessresrerseesrerrresreseseresresseseese 13 Te Simple Byte Trinsfer Mode i cn cetacean eee eect 14 8 Advanced Byte Transfer Mode s cccis sascssivazescstssaveisissgeacdvavaccegasdcvecasvenatessntenede secvaates 16 9 PC program RF Test Benga hugsa neger adsaet 18 10 gt Firmware change uperade ck hae eae eae BA ee Bae 20 11 Changes in this Firmware Verslonnjadnumnngrdesendemend ecehaeeens eaee 21 Micrel Norway Oslo Norway 1 MICRFXXX User Manual for Development System FW v 4 1 Introduction This document MICRFXXX User Manual for Development System describes the features of the development system for MICRFXXX where XXX 505 506 600 610 or 620 The development system is made of 2 development boards For details on the
12. ansmit message correctly e Slave has to receive message correctly Micrel Norway Oslo Norway 11 MICRFXXX User Manual for Development System FW v 4 e Slave has to transmit ack correctly and finally e Master has to receive ack correctly only then is LED1 set ON A new message is transmitted every 100 msec approximately Combination 2 Slave The following procedure is implemented for a 2 Way Link Test Slave LOOP Enter receive mode on frequency n Search for Message If Message found LED1 on Enter transmit mode on frequency n Transmit ack and CRC checksum Ack Message If no Message for 5 attempts LED 1 off Use next frequency randomly selected next time END_LOOP CRC 16 bits is used LED1 will go on if a message is received and will go off if no message is received during 5 attempts Note If LED1 at Slave is ON it indicates 1 way communication OK because e Master has to transmit message correctly and e Slave has to receive message correctly only then is LED1 set ON After reset or if Slave gets out of Sync it starts to jump slowly It stays on every frequency a long time At least long enough for master to transmit a Message on all the frequencies Master Slave sync mechanism in 2 way Link Test Both Master and Slave have an internal timer with a period of approx 100 msec The internal timer of the master is never changed Whenever a period is
13. d DATAIXO pins refer Development Board Inputs Outputs Set the boards in Simple Byte Transfer Mode all DIPs OFF Connect each board in Simple Byte Transfer Mode to a PC running HyperTerminal Send characters or text files between the PCs Note No ARQ is used number of data packets getting through depends on link quality Make sure the cable is 1 1 and that RTS CTS TX RX and GND are used Make sure the data format is 9600 8 N 1 and hardware handshake is used Also make sure the jumpers for RS232 use are in place Finally set two boards in Advanced Byte Transfer Mode Set one as Master the other as Slave Only DIP3 ON for the Master both DIP3 and DIP4 ON for the Slave Select RS232 interface that is make sure RS232 jumpers are in place and connect the boards to PCs Start HyperTerminal or other terminal program and observe that text written on one PC are received and displayed on the other one and v v Try to transmit a textfile note textfile from one PC to the other ARQ is used in this mode that is all data packets should get through Micrel Norway Oslo Norway 7 MICRFXXX User Manual for Development System FW v 4 4 RF Test Modes In RF Test Modes only frequency is used If not changed via the PC program the frequency is MICRF505 915 00MHz MICRF506 433 40MHz MICRF600 915 25MHz MICRF610 868 307692MHz MICRF620 433 4MHz DIP switch setting Combin
14. e The development boards are equipped with a socket for ICSP in circuit serial programming Through ICSP it is possible to download new firmware into the micro controller The download feature is made for use with MPLAB ICD2 from Microchip Connect the development board directly to the ICD2 using the cable from the ICD2 kit Via ICD2 it s possible to step through and debug firmware code as well That is Make your own program download it debug it and run it MPLAB IDE integrated development environment is available for free from Microchip s homepage C compiler must be bought How to upgrade firmware xxx hex xxx firmware name skip reading this if you are familiar with ICD2 Connect ICD2 to your PC and to power please refer to ICD2 user manual Connect ICD2 and development board via the standard ICD2 cable Start MPLAB IDE Select Configure gt Select Device gt PIC18F4320 gt OK File gt Import gt xxx hex gt Open Programmer gt Select Programmer gt MPLAB ICD2 e Programmer gt Settings gt Power Tab Make sure Power target circuit from MPLAB ICD is checked e Programmer gt Settings gt Program Tab Make sure all fields are checked in the Select Memories box gt OK Identify and press the Reset and connect to ICD button in the main menu field If the Target not found warning pops up repeat steps above Identify and press the Program target de
15. he board enters transmit mode and send the presently entered bytes while still buffering new bytes from user note that the board does not wait until buffer is full or until user stops entering bytes 7 Simple Byte Transfer Mode DIP switch setting Combin DIP1 DIP2 DIP3 DIP4 Text 1 OFF OFF OFF OFF Note There is no Master or Slave in this mode of operation Combination 1 Refer to interface description in Interface in Byte Transfer Modes There is no difference between master and slave in this mode Error detection CRC 16 bit is implemented Only 1 frequency is used no frequency hopping Duplicate control or ARQ packets being acknowledged or re transmitted are not implemented in this mode Data flow from UserA to BoardA then to BoardB and finally to UserB 1 If Board A is ready to get bytes CTS is active UserA enters bytes into BoardA 2 Bytes are buffered in BoardA When 1 or more bytes are entered BoardA constructs a frame it adds preamble sync length and CRC to the presently entered bytes BoardA then transmits the frame and BoardB receives it If gt 64 bytes in buffer then user is told to stop entering bytes CTS goes inactive 3 When the frame is completely received by BoardB The CRC is tested If CRC is OK BoardB gives the data to UserB if UserB is ready RTS is active Micrel Norway Oslo Norway 14 MICRFXXX User Manual
16. he firmware is also included Finally a list of changes for this firmware version is given Purpose of the Development system The development system provides hands on experience with the MICRFXXX transceiver The user can use the included firmware the program used in the micro controller and hardware or make a new program and flash it into the micro controller That is the user can use the boards both to evaluate the MICRFX XX and as an aid in the development of a radio communication system A separate PC program is available Through this program it is possible to set the programming word for the MICRFXXX both the frequency dividers and the control bits can be set This program is referred to as RF TestBench Please observe It is possible to read out the firmware version of the development boards via RF TestBench Main modes of operation of the development system e RF Test Modes The user can test the RF properties of the transceiver It is possible to transmit a 1010 pattern or a random pattern transmit a carrier or to stay in receive mode searching for a 1010 pattern In addition the user can select to bypass the MCU completely and control the RF part via header pins e 2 way Link Test Mode In this mode of operation one board is Master and another board is Slave Messages 5 printable ascii characters are transmitted back and forth between the two boards This mode is useful when testing radio commun
17. ication in different environments testing antennas testing encapsulation etc 16 bit CRC is implemented A LED LED1 indicates link OK e Simple Byte Transfer Mode In this mode the user can enter a number of bytes into a development board The board will then transmit the bytes If no user bytes are entered the board will search for RF messages and if found output the message to the user 16 bit CRC is implemented messages received through RF are only given to user if the CRC is OK A 64 byte deep buffer is implemented for both RX and TX Only 1 frequency is used e Advanced Byte Transfer Mode In this mode of operation one board is Master and another board is Slave Operates like the Simple Byte Transfer Mode except When transmitting user data the board will construct a frame by adding frame type frame ID and sync info Automatic frequency hopping is implemented ARQ Automatic Repeat reQuest CRC and duplicate control are implemented as well Master is responsible for maintaining the link by transmitting timestamps If Slave is reset or gets out of sync it requests a timestamp from Master Micrel Norway Oslo Norway 3 MICRFXXX User Manual for Development System FW v 4 Development System Features Pre programmed frequencies e MICRF505 25 frequencies f0 903MHz f1 904MHz f24 927 MHz e MICRF506 4 frequencies f0 433 4MHz f1 433 7MHz f2 434 1MHz f3 434 4MHz e MICRF
18. itches ON or OFF according to the table below The modes of operation described in detail in the following sections are e RF Test Modes Enter RX mode TX a carrier TX1010 or a random pattern enter PC configurable mode or bypass tristate micro controller for user operation of the RF part e Byte Transfer Mode Transfer bytes between e g 2 PCs Select Simple or Advanced e 2 way Link Test Mode Use 2 development boards to communicate If LED1 goes on it indicates Link OK The 4 DIP switches labelled 1 2 3 4 are placed in a single component In addition ON is written on the component Note The 2 way link test is changed in fw version 4 If one of your development boards is v 3 or older we recommend to flash v 4 into the micro available from www micrel com If v 4 is used together with a previous version select the Link Test Pre v4 setting DIP1 DIP2 DIP3 DIP4 Mode of operation OFF OFF gt Byte transfer modes OFF OFF Simple Byte Transfer Mode OFF ON reserved ON OFF Advanced Byte Transfer Mode Master ON ON Advanced Byte Transfer Mode Slav OFF ON gt RF Test Modes OFF OFF Bypass micro controller OFF ON TX a random Manchester coded pattern ON OFF reserved ON ON reserved ON OFF gt 2 Way Link Test Modes OFF OFF LINK_Test_Master OFF ON LINK_Test_Slave ON OFF Pre_V4 LINK_Test_Master ON ON Pre_V4 LINK_Test_Slave ON ON gt R
19. mmands e Itis possible to use the pre programmed settings stored in the flash program memory or the settings stored in EEPROM for the other modes of operation as well that is not only in PC mode Select Flash or EEPROM via a command in RF TestBench SRF TestBench gt Development Board Commands Exception In Advanced Byte Transfer Mode only the pre programmed settings can be used Also note If EEPROM settings are used in 2 way Link Test Mode no frequency hopping will be done only the frequency and control bits stored in EEPROM will be used e If EEPROM settings is selected the board can be disconnected from the PC and the different modes of operation can be run and now the settings stored in EEPROM are used To use the pre programmed settings again Enter PC Mode DIP setting described above and give command from RF TestBench Instruct the board to use the flash memory as the source where to get the control word from e Other possibilities are RF TestBench gt Development Board Commands e Read out the firmware version number the firmware stored in flash program memory of the micro controller e Restart micro controller uC program like a power on reset e Reset EEPROM control word settings to default pre programmed settings e Read out the present EEPROM control word Micrel Norway Oslo Norway 19 MICRFXXX User Manual for Development System FW v 4 10 Firmware change upgrad
20. or 620 is mounted The user I Os are equal for all parts DTE RTS jumper DTE CTS jumper LED1 DTE_RX jumper LED3 DTE_TX Header for optional ext LED4 Jumper ernal I O not mounted LED2 Header for 1 DATAIXO MICRFXXX interface 2 DATACLK 3 LD 4 RSSI 5 10 RS232 connector 9 pin D sub 6 SCLK TCS id PE 8 GND JP205 JP102 MICRF50X 1 RF Trans 1 ceiver or RF A 200 F module 209 ARO Y201 Ru 208 t210 p R209A208 R207 R206 P200 SMA antenna connector 4 ceo am q C307 aq E RLOSRI OARLO7AL0SAI03 RHLORID2R108A106R104 a 3 Ra an hade o z RF power measurement DIP switches 1 2 3 4 ICSP connector Note the ON position A pm Power supply battery ZA o 6 9 volt J300 a o Center pin D300 Oo 030 i a nd ae d m O a P202 R203 R204 R205 4321 L300 Cait EJ Micrel Norway Oslo Norway MICRFXXX User Manual for Development System FW v 4 2 1 Summary of DIP Switch Setting To select mode of operation bring DIP sw
21. reached timer wrap around the Master will enter transmit mode transmit a message turn to receive mode and search for ack If ack is received or not received At the next wrap around a new frequency is entered and the procedure is repeated The internal timer of the Slave is reset whenever a message from the Master is received Then the Slave enters transmit mode and transmits ack then it enters receive mode at the next frequency and start to search for a new message Micrel Norway Oslo Norway 12 MICRFXXX User Manual for Development System FW v 4 6 Interface in Byte Transfer Modes In Simple or Advanced Byte Transfer Mode Interface to the board in the following way Select interface e Insert the 4 jumpers A B C D to select RS232 interface e Remove the 4 jumpers A B C D to select logic levels Connect jumper pins directly to e g a micro controller The board is treated as a DCE data communications equipment The connected user is treated as a DTE data terminal equipment That is a DCE DTE cable should be used This cable should be 1 1 that is Connect pin i on the DCE side to pini on the DTE side The following pins are used referred to a 9 pin connector names related to DTE Pin Name DTE side Direction both DTE and DCE DTE DCE 2 RX AG 3 TX 7 RTS 8 CTS 4 5 Ground Interface setting Baudrate 9
22. requency table holds 25 entries That is several frequency indexes points to the same frequency There is an internal timer in both Master and Slave The timer is a 3 byte 24 bit timer the 3 bytes are called Timer_Upper Timer_High and Timer_Low A Timer_Low overflow will generate an interrupt every 0 37msec approx with a 11 0592MHz xtal connected to the micro controller In the interrupt service routine ISR the Timer_High and Timer_Upper registers are updated Timer_High will overflow every 256 0 37msec 94 8msec This overflow is used to indicate time to change frequency a flag is set in ISR the flag is tested in the main program Whenever Timer_High overflows Timer_Upper is incremented When the main program detects time to change frequency it uses Timer_Upper as an index in a frequency look up table where the frequencies are randomly stored That is The next index will not give the next frequency but a random frequency The internal timer of the master is never changed The internal timer of the slave is updated whenever a frame from master is received Micrel Norway Oslo Norway 17 MICRFXXX User Manual for Development System FW v 4 9 PC program RF TestBench The PC program is referred to as RF TestBench The RF TestBench can be used without the development board It can be used to calculate fields in the control word to enter into MICRF50X Examples Find settings for a specific bit rate
23. s for RF Testing 1 2 3 Set one board to transmit a carrier Use a spectrum analyser to observe the frequency spectrum Repeat for transmit 1010 Set one board to receive mode and another to transmit 1010 Use an oscilloscope to observe the tx ed and rx ed data Data I O Set tx ed data as the trigger source Set one board in receive mode Turn the other board off and use a signal generator to input a 1010 pattern Increase Decrease the output power level from the signal generator and observe LED1 and the rx ed data This can be used to test the sensitivity As long as the LEDI is on the board is able to read a 1010 pattern Although a random pattern should be used in sensitivity measurements this test gives an indication of the possible detectable signal level Note Due to the long off level when an error is detected this method will only give an indication of the zero error input level For example a BER bit error rate of 10 can t be read using this LED on method Micrel Norway Oslo Norway 10 MICRFXXX User Manual for Development System FW v 4 5 2 way Link Test Mode DIP switch setting Combin DIP1 DIP2 DIP3 DIP4 Text 1 ON OFF OFF OFF Master 2 ON OFF OFF ON Slave Note This mode is changed in version 4 Please refer to Summary of DIP Switch Setting In this mode of operation one card is Master and the other is Slave
24. s set on when a message is received This is done to visualize the RF activity Please read the examples below Example 1 Every time Master transmits a timestamp a short flash can be seen on LED3 at the Master board And if the Slave receives the timestamp a short flash can be seen on LED4 at the Slave board Example 2 When a Slave is reset it starts to transmit requests for timing info This can be seen as short flashes on LED3 Then when the slave receives timing info from Master a short flash can be seen on LED4 and the flashing of LED3 stops This can be used to visually identify Master and Slave are sync ed Sync time for a slave being powered off and on should be lt 1 second depending on link quality it may take several seconds Example 3 When a Master is reset it will transmit timestamps for approx 3 seconds to be sure Slave is resyne ed The LED3 will flash during this period it appears to be on due to short time between transmissions The Slave will flash LED4 for every timestamp it receives it will not receive all because the jump pattern is updated when a timestamp is received Micrel Norway Oslo Norway 16 MICRFXXX User Manual for Development System FW v 4 Automatic hopping between frequencies is implemented For MICRF505 MICRF600 To meet the FCC part 15 247 regulations The units will jump approx 10 times second For the MICRF506 610 and 620 less than 25 frequencies are used but the f
25. st parameters like deviation and transmit spectrum Combination 3 Transmit carrier The board will enter transmit mode and transmit a carrier that is no modulation is applied This can be used to check the frequency spectrum the output power and the current consumption Combination 4 Enable configuration via PC This setting is also referred to as PC mode Refer to the chapter called PC Program for details on the PC program Make sure the 4 jumpers DTE RTS DTE_CTS DTE RX and DTE TX are in place If the power LEDs are off Make sure the board is powered on without the RS232 cable connected and then connect the cable Entering PC mode Before any command is given from the PC the RF chip will stay in receive or transmit mode depending on the selected mode before entering PC mode While in PC mode When a control word is sent from the PC to the board the board will store the entered word in EEPROM and program the RF chip with it It is possible to transfer a control word from 2 dialog boxes press the Transfer button inside the dialog box Main menu ORF TestBench gt Quick Setup or Main menu RF TestBench gt Complete Setup When leaving PC mode The board will use the default control word already programmed into the flash program memory or it will use the control word entered from the PC program and stored in the EEPROM Which one to select the source of the con
26. trol word is selected in the PC program select gt RF TestBench gt Development Board Commands From the PC program try e g to change the output power level PA setting and observe the effect on spectrum power consumption and link range Combination 45 Bypass Micro Controller Using this combination it is possible to use an external micro controller to control the RF part Connect to the interface pins as described in Development Board Inputs Qutputs The EEPROM control word can be used in RF Test Modes 2 way Link Test Mode and Simple Byte Transfer Mode It will not be used in Advanced Byte Transfer Mode If the EEPROM control word is used in 2 Way Link Test Mode No frequency jumping is done only the control word stored in EEPROM will be used Micrel Norway Oslo Norway 9 MICRFXXX User Manual for Development System FW v 4 All I O pins of the on board micro are tristated New in v 4 None of the MCU s IOs are set as output at power on if this combination is selected That is The User has full control without the MCU interacting at all not programming the RF chip etc The DIPs are tested before the IOs are initiated Combination 6 Transmit a Random Pattern The board will enter transmit mode and transmit a random Manchester coded pattern i e without a DC component Combination 6 can be used to test parameters like deviation and transmit spectrum Suggestion
27. vice button in the main menu field Wait for programming to finish refer to the Output window and remove the development board from ICD2 e Optional Confirm firmware version via RF TestBench Micrel Norway Oslo Norway 20 MICRFXXX User Manual for Development System FW v 4 II Changes in this Firmware Version V4 2005 06 21 PKB Included 610 and 620 Modules Link test payload 5 bytes Previous Link Test still available Read DIPs before setting IOs This will make sure all pins are kept in tristate if Bypass MCU is selected at power on Included bit error rate measurement as a command from PC program requires PC program v 7 Not programming the complete control word into the RF chip every time Several code upgrades refer to main c A single Project is made including all RF parts After opening the project in MPLAB IDE Please make sure to define the correct part in p18def h Micrel Norway Oslo Norway 21
Download Pdf Manuals
Related Search