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CambridgeIC CTU Software User Guide

1. FTDI DLL ftd2xx dll CTU Adapter Windows CTU Adapter Driver Page 1 of 31 CambridgelC CTU Software User Guide Cambridge IC 1 Background 1 1 Software Platform The software architecture is illustrated in the Windows PC box of Figure 1 The applications described in this document are coded using National Instruments LabVIEW graphical programming language They are built as stand alone applications so that it is not necessary to have LabVIEW installed to run them They require only the Run Time Engine which is included in the installer section 3 The LabVIEW Virtual Instruments VIs used to build the applications are also available for customers who have LabVIEW This enables a customer to rapidly develop their own demonstration applications and to integrate with their own test equipment in a single programming environment These Vis are documented in the CTU LabVIEW VI User Guide The applications use two DLLs for communicating with the CTU Adapter The higher level one is Cambridge C DLL and this contains all of the functions required to send data to and from a CTU chip over its SPI interface together with functions for controlling the Adapter itself The Adapter contains a chip for USB communication from FTDI This has its own DLL ftd2xx DLL which must also be loaded on the PC to enable Cambridgel C DLL to communicate with the Adapter They are also included in the ins
2. There are two options as illustrated in Figure 8 Search automatically is recommended if the PC is connected to the internet it will search Windows Update for the latest driver Alternatively select Browse my computer for driver software and proceed according to section 2 3 How do you want to search for driver software Search automatically for updated driver software Windows will search your computer and the Internet for the latest driver software for your device unless you ve disabled this feature in your device installation settings Browse my computer for driver software Locate and install driver software manually Figure 8 Update Driver Software Cambridgel C CTU Adapter USB The driver is in two parts the one used by the CambridgelC CTU Applications Cambridge IC CTU Adapter USB and the VCP driver Cambridge IC CTU Adapter USB COMxxx These are listed separately for example in the window of Figure 4 Windows treats these two drivers separately and they must both be updated together ideally VCP driver first Begin each installation by clicking on the relevant driver in the window shown in Figure 4 Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 6 of 31 CambridgelC CTU Software User Guide Cambridge IC 2 3 Manual Installation Windows XP The files required for the Windows Adapter Driver are available as a zip file from the download section of www cambridgeic com Please
3. Amplitude is a measure of signal quality and depends mainly on the gap between target and sensor Relative Frequency is the CTU s approximate measurement of the target s resonant frequency in Hz relative to the nominal centre frequency 5 2 Type 2 Results Window The CAM204 CTU chip can process one Type 2 sensor Connect a Type 2 sensor to the CTU and run CTU Demo with Sensor Type set to 2 The window illustrated in Figure 20 displays measurement results EJ Display lype2Results_ x vi File Edit Operate Tools Window Help Cambridge IC senat Sonn 5 000 CTU Reported Position l 130512 Amplitude A l 11795 Relative Frequency Hz 2752 Reported Position 99 573 vaa d Amplitude B 1962 BA Position Mismatch 0 23 I ede I LE oe I tout I LE on ee I II lI l a a I toed I edd I ILI lI I edd I L ee L on tout LE oe ILI lI I E on I tout I L I tout I ede I L on I 275 250 225 200 175 150 125 100 75 50 25 OF 0 75 100 125 150 175 200 2235 250 25 i gt Figure 20 Display Type 2 Results screen shot Sin Length scales from CTU Reported Position units to physical units mm It applies to the Type 2 sensor s Fine Pitch A parameter usually 50mm Reported Position is calculated from CTU Reported Position with Equation 1 Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 13 of 31 CambridgelC CTU Software User Guide Cambridge IC 5 3 Type 6 Results Window The CAM204
4. chip can process either one or two Type 6 sensors Connect the sensor s to the CTU and run CTU Demo with Sensor Type set to 6 The window illustrated in Figure 21 will launch and displays measurement results Type 6 sensors have a Subtype For example a Type 6 3 sensor is Type 6 Subtype 3 The Subtype is the number of fine sensor coil periods per circle The correct value for each sensor must be entered in the Num Fine Periods Subtype control The SinLength parameter is the pitch angle of the fine sensor coils and its value in degrees is calculated automatically for each sensor Table 1 shows the expected values Subtype may be changed while CTU Demo is running new values are sent to the CTU chip automatically when required Each sensor s State control may be independently set to Active or Inactive Setting unused sensors to Inactive increases the maximum sample rate for the others DisplayType6Resu File Edit Operate Tools Window Help Results K Cambridge IC bensor 1 controls Sensor 2 controls Num Fine Periods Subtype Num Fine Periods Subtype Incremental not allowed i 5 Incremental not allowed Sensor 2 results 72 000 Sin Length l 20 573 Reported Position 120 000 Sin Length 23 95 BA Mismatch l 6786 Amplitude A 59 13 BA Mismatch 1169 Relative Freq Hz 911 Amplitude B 3581 Relative Freq Hz y j Figure 21 Display Type 6 Results screen shot Each sensor may be operated i
5. click the icon for the device in Devices and Printers Figure 3 Cambridgel C CTU Adapter Properties General Windows 7 Select the Hardware tab The window will change as shown in Figure 4 P Cambridge CTU Ad USB T Cambridgel CTU Adapter USB COM160 Ports COM Manufacturer CambridgelC Location Port_ 0006 Hub_ Fah Device status This device is working propery Figure 4 Cambridgel C CTU Adapter Properties Hardware Windows 7 Select Cambridgel C CTU Adapter USB or Cambridgel C CTU Adapter USB COMxxx as appropriate see the end of this sub section then click on Properties The window of Figure 5 will appear Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 4 of 31 CambridgelC CTU Software User Guide Cambridge IC CambridgelC CTU Adapter USB Properties Cambrdgel CTU Adapter USB Device type Universal Serial Bus controllers Manufacturer CambridgelC Location Port_ 0006 Hub_ 0004 Device status This device is working properly Figure 5 Cambridgel C CTU Adapter USB Properties General Windows 7 To view driver settings click on the Driver tab and the window shown in Figure 6 will appear including the driver version number Cambridgell CTU Adapter USB Driver Provider 3 CambrdgelC Driver Date 18 03 2011 Driver Version 2 6 14 0 Digital Signer Microsoft Windows Hardware Compatibility Publisher To view details about the driv
6. create an account log in visit the Products main page then the Tools and Accessories section The Windows Driver appears under the Tools Downloads banner in the right hand column The driver is also available from the CD supplied with a CTU Development Kit Start by saving the driver files to an appropriate directory on the target PC Connect the Adapter to the PC using a USB cable The Windows Found New hardware Wizard should launch To automatically detect the most recent driver available from Windows Update click on Yes this time only For manual installation select No not this time as illustrated in Figure 9 then click on Next Found New Hardware Wizard Welcome to the Found New Hardware Wizard Windows will search for current and updated software by looking on your computer on the hardware installation CD or on the Windows Update Web site with your pennission Read our privacy policy Can Windows connect to Windows Update to search for software Yes this time only Yes now and every time connect a device Click Next to continue Net gt Figure 9 Driver installation step 1 Now tell Windows where to look for the driver files just copied to the PC as illustrated in Figure 10 and press Next Found New Hardware Wizard Please choose your search and installation options Use the check boxes below to limit or expand the default search which includes local paths and removabl
7. firmware to a CTU chip that is integrated with a customer s product with its own supply and no nRESET connection If this is the case the host system must reset the CTU and not attempt any SPI communication with it before upload Press the Update CTU with firmware button to start the upload process The process usually takes less than 10 seconds If successful the CTU info box shows updated version information The System Version should match the version number quoted in the CTU Firmware File comments box The bootloader is fixed and the update process does not change the Bootloader Version Ed UpdateCtuFirmware_ x vi File Edit Operate Tools Window Help Cambridge IC CambridgeIc CTU Adapter snTcToNS Software Version Change CTU Firmware File V2 03 build 0001 Wed Mar 24 16 58 12 2010 CTU Firmware File cff Bootloader V2 01 build 001 J C CamIc Configuration 020 0004 CTU Firmwareti020 0004_004 004 cf CambridgeIC DLl Version Vendor ID Product ID 1 4 0 0 fosos asso PAPAGE E ee CTU Firmware Update Version 4 04 Build Number 0001 aoe Date Wed Apr 14 20 04 11 2010 The last 2 bytes of the binary data are the checksum of this file eith firmware exduding any lines begining with a comment character Progress No comment lines are present after this comment block The checksum algorithm used is Name CRC 16 Polynomial x16 x15 x2 1 08005 Figure 34 Update CTU Firmware screen
8. in the appropriately named directory on the CD supplied with a CTU Development Kit Start by saving these files to an appropriate directory on the target PC The PC s security settings may prevent files from being copied out of the zip file until it has been unblocked If this is encountered right click on the zip file in a file browser and click on unblock It is recommended to shut all other programs before installation If an older version of Cambridgel C CTU Software is already installed this should be uninstalled with the procedure of section 3 2 Locate and launch the setup exe program Follow the on screen prompts to complete the installation Once completed the applications require a restart of the PC for correct operation Microsoft Vista may display the warning illustrated in Figure 14 during installation because the CTU software is not registered with Microsoft The publisher could not be verified Are you sure you want to run this software Name Complete CtuDevelopmentToolsV1 1 setup exe Publisher Unknown Publisher eps EEE ee Type Application From Z CTU Demo Software Complete CtuDevelopme an This file does not have a valid digital signature that venties its publisher You should only run software from publishers you trust How can decide what software to mun Figure 14 Vista PC warning 3 2 Uninstalling Select the Control Panel from the start menu on the PC s desktop Double click o
9. is connected to the internet Installation may take a few minutes the first time The Windows task bar advises when installation is complete 2 2 Verifying and Modifying Driver Installation Windows 7 To check installation or make any modifications click on Windows 7 s Start button and select Devices and Printers The window shown in Figure 2 will launch Ss gt E Hard Devices Le I Search Devices and Printers pP Add a device Add a printer 4 Printers and Faxes 3 Microsoft XPS Sad ta Document Writer OneNote 2010 4 Unspecified 1 Cambridgel CTU Adapter 6 ttems ef Figure 2 Devices and Printers Windows 7 Right click on Cambridgel C CTU Adapter Windows will show 3 options Create shortcut Troubleshoot or Properties If there have been difficulties with driver installation and the PC is connected to the internet Troubleshoot is recommended Windows should identify and correct the problem Select Properties to view driver details or make changes manually The window of Figure 3 will appear Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 3 of 31 CambridgelC CTU Software User Guide Cambridge IC W CambridgelC CTU Adapter Device Information Manufacturer Unavailable Model CambridgelC CTU Adapter Model number Unavailable Categories Unknown Description Unavailable Device Tasks To view tasks for this device right
10. is pressed a single data row is added to the file EJ Save loFile_ x vi File Edit Operate Tools Window Help KCambridge IC Comment ITest A 2009 2010 Cambridge Integrated Circuits Ltd MS Current results file a C CamIcWechnology SystemTest Misc CtuDataExport TestExportFile 1 txt Comment Date Time PositonAverage PositionStdDev PositonPkDevFromAve AmplitudeAverage AmplitudeMax Amplitudemin RelFregAverage RelFregMax RelFregMin AmplitudeBAverage BAPosMismatchPkDevFromd Number ValidSamples SinLength SensorNumber systemVersion SourceApplication Il Figure 23 Save to File window screen shot Test A 22 07 2010 09 21 28 771 0 018 0 049 6143 875 6148 000 6141 000 3739 719 3710 000 3763 000 0 000 0 000 0 000 0 000 0 000 64 000 360 000 1 000 O0x0404 CtuRepeatAverageE When used with CTU Demo the Text to save table displays the results of the most recent measurements on each sensor In this case the update rate is controlled by CTU Demo If Single shot mode is active the update rate is the maximum the PC can achieve for the number of sensors active If CONT is active the CTU chip times the approximate interval between samples on all active sensors and the interval between samples controlled with SYSI CTU Demo Saves data from all active sensors When used with CTU Repeat Average individual measurements are taken from a single selected sensor at the maximum rate They are proc
11. los the sensor s sample indicator function activates SCTRL determines whether sample indicators are to occur on each new position or only on VALID positions SAUTOCLR determines whether the sample indicator is cleared automatically by the CTU and when the clearing takes place Set this to No Autoclear to clear sample indicators over the SPI interface by clearing the SIE bit in the SCW register to Before Measurement to ensure the 10 toggles each measurement or to After Measurement when using sample indicators to output a stable indication of a sensor s VALID bit The CTU can operate LEDs that are controlled by its user los An LED mapped to a sensor with the LEDMAP control is turned on when the last measurement s Amplitude reading exceeded its LEDTHRESHOLD value It is turned off when it is below the minimum Amplitude setting for the CTU Finally it flashes when the Amplitude is between the two thresholds to indicate that a target is present but Amplitude is not yet sufficient LEDTHRESHOLD is application specific and depends on the performance required Performance generally improves with increasing Amplitude Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 23 of 31 CambridgelC CTU Software User Guide 7 Cambridge IC 8 5 CTU Control Panel DAC Control The CTU can be configured to drive an external Digital to Analog Converter providing it is compatible with one of the supported formats Please refer to
12. the datasheet for the CTU device for more details The DAC Control tab is illustrated in Figure 28 There are two groups of controls an upper set that define system level behaviour applying to all sensors and a lower set that define how measurements from each sensor update DAC outputs Ed CtuControlPanel_2x vi SEE File Edit Operate Tools Window Help ya A Info System Measurement Sample Indicators amp LEDs DAC Control DAC Transfer Fn Pos Trig Control Pos Trig Positions Registers that define DAC and global behaviour System Control Registers DACCAL NO DAC SPI Mode fo CPOL 0 CPHA 0 l DACFORMAT f ji a po NVMODE DAC behaviour if invalid D Default Value Mode DAC registers associated with each sensor Sensor Registers DACEN x 4sensors Enables DAC output pac Enabled OAC Enabiea OAC Enabled OAC Enabled DACOP x 4 sensors DAC specific control DACADDR x 4 sensors Selects DAC output DACNV x 4sensors DAC output on invalid feo faeo io Feo _ Figure 29 CTU Control Panel DAC Control tab Among the system registers the CACCAL control is for DAC calibration and should normally be set to NO The correct setting for the DAC SPI Mode and DACFORMAT controls depend on the type of DAC connected Please refer to the CTU datasheet for the correct settings or load a CTU Register File appropriate to that DAC The NVMODE control determines the DAC output when sensor measurements a
13. 010 Figure 33 Update Adapter Firmware screen shot Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 28 of 31 CambridgelC CTU Software User Guide Cambridge IC 10 Update CTU Firmware This application updates the firmware that runs inside CTU chips This enables new features or bug fixes to be uploaded to the CTU using a PC connected to an Adapter Figure 33 illustrates the application s window Press the Run button if the application is not already running The application prompts for the location of the file to program The file and location may also be changed by pressing the Change CTU Firmware File button The CTU Firmware File comments box displays the file s header information including version information The button labeled CTU contains cff already determines the method that the Adapter uses to initiate firmware upload to the CTU Set this to Yes if the CTU contains valid firmware already for example if works with the CTU Demo application Set it to No if the CTU does not contain valid firmware for example because a previous firmware upload was stopped before completion When set to No the upload process can only begin immediately after the CTU is reset The Adapter tries to reset the CTU itself by toggling its nRESET output and by dropping its power output to zero briefly In some cases these may not be connected to the CTU for example if the Adapter is being used to upload
14. 4 Sensor 1 results Sensor 2 results Sensor 3 results l 2 15 Reported Position l 45 11 Reported Position l 51 16 Reported Position l 163 31 Reported Position l 6244 Amplitude l 6455 Amplitude l 5707 Amplitude l 6263 Amplitude l 3667 Relative Freg Hz l 25665 Relative Freg Hz l 2511 Relative Freg Hz l 2915 Relative Freg Hz Figure 19 Display Type 1 Results screen shot Document part no 033 0007_0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 12 of 31 CambridgelC CTU Software User Guide Cambridge IC The CTU Demo window displays the PC s estimate of the number of position updates per second for the set of active sensors This figure is typically 250 updates per second when one sensor is active When integrated into a typical host system without PC timing much faster rates are achievable By default Single Shot PC is active each measurement is initiated by the PC This yields the greatest number of updates per second However PC timing is erratic Clicking on this control changes to CONT CTU and makes the CTU operate in its continuous mode with the interval between measurements more accurately controlled by the CTU s SYSI register SYSI should be set to at least 10ms 1 sensor active or 20ms 4 sensors active so that the PC does not interrupt measurements in progress Click on the Power down mode button to put the CTU into its power down mode The application STOP button only works when this control is inactiv
15. CambridgelC CTU Software User Guide Cambridge IC JI Description CambridgelC s Central Tracking Unit CTU chips work with sensors built from PCBs to measure the position of contactless targets using resonant inductive sensing technology CTU chips are designed to be embedded inside electromechanical products and communicate with a host system processor over an SPI interface To assist demonstration evaluation and development CambridgelC provides hardware and software that works with a PC A CTU Adapter enables a PC to communicate with CTU chips by converting between SPI and USB interfaces This document is a User Guide for the software Resonant Inductive Position Sensing System lt Target gt SPI Applications CTU Demo for displaying measurements CTU Repeat Average for extra precision and stats Save to File for exporting data Update Adapter Firmware Update CTU Firmware CTU Control Panel for configuring manipulating and saving CTU settings System Requirements e Windows XP or Windows 7 CAM204A nterface Sensor PCB lt _ gt CTU Chip Figure 1 System block diagram Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 USB CambridgelC nterface Windows PC CTU Development Software i LabVIEW Run Time Engine i CambridgelC DLL CambridgelC dll i
16. bridgelC CTU Software User Guide Cambridge IC 8 7 CTU Control Panel Position Trigger Control The CTU can be configured to generate Position Triggers when a sensor s measured position passes pre set values This sub section describes the CTU Control Panel controls associated with Position Triggers illustrated in Figure 30 The next section 8 8 describes controls for the Position Trigger Positions themselves Ed CtuControlPanel_2x vi SE File Edit Operate Tools Window Help nai Info System Measurement Sample Indicators amp LEDs DAC Control DAC TransferFn Pos Trig Control Pos Trig Positions Sen 1 Sen 2 Sen 3 Sen 4 Seni Sen2 Sen3 Sen4 PTmMAP Position Trigger Mapping select IO 8 position triggers x 4 sensors Sioi 1 ioi 1 or 1 ior i 3 F I03 3 Slto3 3 03 3 03 al Toi ja gior fi sior go sioz PTmDIR Position Trigger Direction 8 position triggers x 4 sensors ill ylposinegH i y posinegH i ylposlnegH SlActivate fo Activate jo 3 PTALTOCLR Position Trigger Autodear whether to dear IO on next sample F Sauto Clear 1 lAuto Clear 1 lAuto Clear 1 Auto Clear HYSTERESIS 10100 10100 10100 lt 10100 Figure 31 CTU Control Panel Position Trigger Control tab The controls are all arranged in 4 columns one for each sensor The 5 upper controls are arranged in 8 rows one for each of 8 available Position Triggers per sensor PTmMAP c
17. dware configurations Hardware Profiles Figure 12 Checking drivers step 1 2 Device Manager SEE File Action View Help He em A E Network adapters Virtual COM Port Driver Ports COM amp LPT if CambridgelC CTU Adapter USB COMS5 af Communications Port COM1 F Prolific USB to Serial Comm Port COM3 ae Processors Sound video and game controllers Se Storage volumes System devices Universal Serial Bus controllers CambridgelC CTU Adapter USB Intel R ICHS Family USB Universal Host Controller 2830 Intel R ICH amp Family USB Universal Host Controller 2831 Intel R ICH amp Family USB Universal Host Controller 2832 ain USB Driver Figure 13 Checking drivers step 2 If the driver is not properly installed but is listed in the Device manager it may be necessary to uninstall it before trying again This can be done by right clicking each driver in turn in the Device Manager window and selecting Uninstall It is possible to disable a driver by right clicking on it in the Device manager list and clicking Disable and to enable it again by selecting Enable from the same location Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 9 of 31 CambridgelC CTU Software User Guide Cambridge IC 3 CambridgelC CTU Software Installation 3 1 Installing The files required for installation are available as a zip file from the download section of www cambridgeic com or
18. e Click on Activate save window to launch the Save to File window which is described in section 7 5 1 Type 1 Results Window The CTU Development Kit is supplied with Type 1 sensors The CAM204 CTU chip can process up to 4 Type 1 sensors The display window illustrated in Figure 19 includes a set of displays and controls for each sensor Each sensor s State control may be independently set to Active or Inactive Setting unused sensors to Inactive increases the maximum sample rate for the others The raw position output for each sensor is CTU Reported Position and this is a signed 16 bit word for Type 1 sensors 32768 to 32767 It is displayed on the circular dial Sin Length controls how this value is scaled to Reported Position CTU Reported Position R ted Position SinLength x eported Position inLeng 65536 Equation 1 The application s default values of Sin Length are for the CTU Development Kit as shipped resulting in Reported Position in mm for the three linear sensors and degrees for the rotary sensor Change Sin Length for other sensors and operating conditions and when sensors are plugged into different CTU inputs Values are quoted in the relevant sensor s datasheet It is also possible to view position measurements as a percentage of Sin Length by setting Sin Length 100 or in CTU units by setting Sin Length 65536 The VALID indicator reflects the state of the sensor s VALID flag indicating a target in range
19. e media The best diver found will be installed C Search removable media floppy CD ROM Include this location in the search C CamIC Contiguration 021 0001 Windows Adapte Dont search will choose the driver to install Choose this option to select the device driver from a list Windows does not guarantee that the driver you choose will be the best match for your hardware Figure 10 Driver installation step 2 After a few seconds the installation should complete successfully with the window illustrated in Figure 11 Press Finish to complete installation Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 7 of 31 CambridgelC CTU Software User Guide Cambridge IC Found New Hardware Wizard Completing the Found New Hardware Wizard The wizard has finished installing the software for e CambridgelC CTU Adapter USB Click Finish to close the wizard Figure 11 Driver installation step 4 As noted above the driver is in two parts Repeat the process from step 1 above Once both parts are installed the drivers are ready for use It is possible to verify their installation using the steps illustrated in the next section but this is not usually necessary Windows may require driver installation for each different CTU Adapter that is plugged into a PC since it recognises each as different by its serial number Windows may also require driver installation for each dif
20. e same set of bits for each sensor This control may be updated by the user or by the File gt Window button Its contents are written to the CTU when the CTU gt Window Window gt CTU gt Window or Window gt CTU Defaults buttons are pressed Within the SCW controls each sensor s GO bit is set to either Active to kick off a measurement or to Inactive to not kick off a measurement The GO and CONT bits should both be set to Active for continuous measurement or just the GO bit for a single shot measurement Each sensor s TRIG bits enable Position Triggers for that sensor The CTU sets a sensor s NEW bit each time it takes a measurement The NEW bit controls on the right hand side should be set to Clear to ensure the indicators on the left are accurate Sample Indicators are digital outputs from the CTU that indicate the completion of a measurement and or the status of the last measurement Each sensor has an enable bit SIE for sample indicators and a flag indicating whether or not they have been activated SIF Sample Indicators are configured with the Sample Indicators and LEDs tab see section 8 4 For sensor Types that support the feature such as Type 2 the INCE bit selects incremental measurement mode Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 22 of 31 CambridgelC CTU Software User Guide Cambridge IC The VALID indicators show the state of each sensor s VALID bit which indicate
21. easures of noise in the averaged output Neither improves as Requested num VALID increases although they do become less variable themselves CTU Repeat Average is designed to work with different sensor types Set the Sensor Type control before running so that the CTU chip and PC software performs the correct operations Some sensor Types including Type 6 have different Subtypes and in this case the Subtype control must also be set to the correct value for the sensor Otherwise it must be left at its default value of 0 As with CTU Demo Sin Length scales from the CTU s reported position data to physical units such as mm or degrees used for reporting position measurements SinLength must be entered it is not calculated automatically Values for any sensor are provided in its datasheet The SinLength value of Type 6 sensors is determined by their Subtype see Table 1 Select Rotary from the Linear Rotary button when operating a rotary sensor to ensure the apparent discontinuity at 180 is dealt with properly For a rotary sensor the average of 175 and 177 is 179 not 1 The CAM204 CTU chip supports up to 4 Type 1 sensors or up to 2 Type 4 or 6 sensors Select the one to measure with the Sensor number control Sensor number must be set to 1 for a Type 2 sensor Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 15 of 31 CambridgelC CTU Software User Guide Cambridge IC File Edit Operate Too
22. eful for configuring CTU chips for autonomous operation It includes controls for transferring settings to the CTU s non volatile memory so that they become the new Configurable Defaults These allow the CTU to operate autonomously without a host device connected to the SPI interface Typical applications include driving an external DAC to generate an analog output and generating position triggers Figure 23 shows a screen shot of the left hand side of the application s window Sensor Register and System Control Register settings are listed to the left and bottom respectively The state of each individual register depends on the settings of controls located in the tabs on the right hand side of the application The rows highlighted with a blue indicator show the registers that are controlled by the tab currently activated The right hand side of the application s window is devoted to a set of tabs controlling individual CTU functions and these are described in the following subsections X CtuControlPanel_ 2x vi File Edit Operate Tools Window Help Sensor Type all sensors A K Cambridge IC E ZL vos oes Make Destination File equal Source Sensor Registers Beni Ben 2 Sen3 Eens Penz rs Ee co oroare om fro o ae Fa pooo lo000 x o000 x 0000 CTU Register File Destination E il Foro fos J Oxno4 0000 _ o000 x oo00 oo00 Transfer data to and from CTU A x
23. ent HYSTERESIS also applies to the DAC output and it is recommended that it be set to 0 when the CTU is configured to control and external DAC unless the application specifically requires different 8 8 CTU Control Panel Position Trigger Positions The previous section 8 7 was about how to use CTU Control Panel software to configure Position Trigger behaviour This section is about setting the Position Trigger Positions themselves Figure 31 shows the Position Trigger Positions tab Each column of controls represents one sensor and each row represents one of the 8 available Position Triggers EJ CtuControlPanel_2x vi DEAR File Edit Operate Tools Window Help Info System Measurement Sample Indicators amp LEDs DAC Control DAC Transfer Fn Pos Trig Control Pos Trig Positions Sensor i Sensor 2 Sensor 3 Sensor 4 FTF Position Trigger Positions Figure 32 CTU Control Panel Position Trigger Positions tab Position Trigger Positions are signed 16 bit integers in the range 32768 to 32767 This corresponds to position as reported by the CTU when sensor Type is set to 1 or 4 Its relationship to physical units such as degrees or millimeters is described by Equation 1 in section 5 1 The relationship is scaled to allow 16 bit register representation for other sensor Types Please see the CTU s datasheet for details on this scaling Document part no 033 0007_0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 27
24. er files Update Driver To update the driver software for this device If the device fails after updating the driver roll Roll Back Driver i h back to the previously installed driver Disable Disables the selected device Uninstall To uninstall the driver Advanced Figure 6 Cambridgel C CTU Adapter USB Properties Driver No Admin Windows 7 This window does not allow changes to be made to the driver Update Driver Roll Back Driver etc are greyed out and can not be selected Changes require Admin privileges Starting from the General tab window of Figure 5 click on Change settings A new window will launch Select the Driver tab as before This time the window will allow changes as shown in Figure 7 Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 5 of 31 CambridgelC CTU Software User Guide Cambridge IC Cambridgell CTU Adapter USB Driver Provider CambridgelC Driver Date 18 03 2011 Driver Version 2 8 14 0 Digital Signer Microsoft Windows Hardware Compatibility Publisher Driver Details To view details about the driver files To update the driver software for this device f the device fails after updating the driver roll back to the previously installed driver Disables the selected device To uninstall the driver Advanced Figure 7 Cambridgel C CTU Adapter USB Properties Driver With Admin Windows 7 To update the driver click on Update Driver
25. essed in batches to determine Position Average and other statistics which are passed to Save to File Change CTU Repeat Average s Requested num VALID control to change the update rate Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 17 of 31 CambridgelC CTU Software User Guide Cambridge IC Data is always appended to the selected file and can not be removed within the Save to File application If data needs to be removed this can be done using a text editor or in Microsoft Excel CTU Demo can generate up to 40kB data per second at maximum rate so file sizes can quickly become excessive The Max file size control sets the maximum allowed size in kB and can be changed by the user to suit their needs If File size exceeds Max file size then saving is disabled to protect against accidentally generating large files In addition to the data originating from the CTU Save to File includes a comment the date and the time at the beginning of each data row and the CTU system version and source application that generated the data at the end of the row The comment data comes from the Comment box and enables the user to add data to each row for example temperature actual position s or other configuration data The time is in 24 hour clock format and includes seconds and thousandths of a second hours minutes seconds xxx The best resolution available from the PC s internal clock is typically 16ms Whe
26. f 31 CambridgelC CTU Software User Guide Cambridge IC 8 2 CTU Control Panel System Tab The System tab includes system level CTU settings as well as provision for resetting the CTU Its contents are shown in Figure 25 below Ed CtuControlPanel_2x vi Figure 26 CTU Control Panel screen shot System tab The PWRDN button controls the state of the CTU s power down bit which puts the CTU into a low power mode This control must be returned to inactive for access to other functions The Reset CTU SPI Interface button sends a reset command to the CTU over its SPI interface Reset CTU power cycle resets the CTU by turning its power supply off then on again This control will only work if the CTU s power supply is controlled by the CTU Adapter If not Reset CTU SPI Interface button should be used instead The SYSI control is the interval between measurements when the CTU is set to continuous mode The interval is measured by the CTU The value is approximate and is in milliseconds BOOTVER and SYSVER report the version numbers of the CTU s bootloader and application firmware respectively SYSID is a user configurable System ID It is the first word read out of the CTU over the SPI interface each transaction and may be used to verify the identity of individual CTU chips when there are multiple devices on the Same SPI bus The LO Configuration control cluster determines the active state and type of output for eac
27. ferent USB port that a CTU Adapter is plugged into It is therefore recommended to avoid changing the USB port that the Adapter is plugged into where possible Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 8 of 31 CambridgelC CTU Software User Guide Cambridge IC 2 4 Verifying Driver Installation Windows XP To check installation status for example if any difficulties are encountered follow the steps below Right click on My Computer on the PC s desktop and select Properties Select the Hardware tab to view the window illustrated in Figure 12 Click the Device Manager button which launches the Device manager window Expand the Ports COM amp LPT and the Universal Serial Bus controllers by clicking on the symbols to their left The two CambridgelC drivers should be listed as illustrated in Figure 13 System Properties f System Restore Automatic Updates Remote Computer Name Hardware Advanced General Device Manager The Device Manager lists all the hardware devices installed on your computer Use the Device Manager to change the properties of any device Device Manager Driver Signing lets you make sure that installed drivers are compatible with Windows Windows Update lets you set up how Windows connects to Windows Update for drivers Driver Signing Windows Update Hardware Profiles Hardware profiles provide a way for you to set up and store different har
28. functions calculated from above sensor 2 sensor 3 0 DACDATA 65535 Figure 30 CTU Control Panel DAC Transfer Function tab The 4 upper rows of controls labeled A D represent the CTU s DACPOSA D registers These define the start and end points of the up and down slopes of the transfer function Below these controls there is a row of Invalid DACPOS indicators one for each sensor They indicate whether the settings above are valid or not If not the DAC function will not work properly For settings to be valid DACPOSA D must be ordered correctly as set out in the CTU datasheet The next two rows of controls correspond to the CTU s DACLIMX and Y registers These define the lower and uppermost DAC outputs respectively Once again there is a set of 4 indicators below indicating whether the settings are valid Invalid DACLIM In this case DACLIMY must be greater to or equal to DACLI MX The 4 graphs at the bottom of the window are plots of the DAC Transfer Function based on the settings above Like the other indicators these will update when the application is running The x axis of each graph corresponds to the range of possible sensor positions The y axis is the DAC data that will be output by the CTU at each position The value 0 generally corresponds to the low end of the DAC s output range and 65535 to its high end Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 25 of 31 Cam
29. h of the CTU s User IOs The left hand controls correspond to 101 Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 21 of 31 CambridgelC CTU Software User Guide Cambridge IC 8 3 CTU Control Panel Measurement Tab The Measurement tab is for controlling CTU measurements and checking measurement results Its contents are shown in Figure 26 Ed CtuControlPanel_ x vi File Edit Operate Tools Window Help Info R Measurement Sample Indicators amp LEDs DAC Control DAC Transfer Fn Pos Trig Control Pos Trig Positions SCW read from CTU 4 sensors SCW controlling CTU 4 sensors VALID flag read only INCF fag read only i Sensor Number from SCW read only Sin Length by sensor if Type 1 or 4 scales CTU Reported Position to Reported Position Sin Length if Type 2 Sin Length if Type 3 350 000 350 000 360 000 360 000 fo C Results Type lor 4sensor read only Results Types 2 or 3 sensor read only Figure 27 CTU Control Panel Measurement tab The top two clusters of controls relate to the CTU s Sensor Control Word registers SCW SCW Read from CTU is updated when registers are read from the CTU by the CTU gt Window and Window gt CTU gt Window buttons Each row of buttons corresponds to one bit within the SCW register Each column corresponds to one sensor with sensor 1 on the left To the right is the SCW Controlling CTU control This includes th
30. hat the value used matches the incorrect the sensor appropriate value from the sensor s datasheet Try closing and the software then opening and running it again Other errors Try unplugging the Adapter from the USB port and plugging it back in again Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 30 of 31 CambridgelC CTU Software User Guide Cambridge IC 12 Document History Revision ate Description S O Updated logo and stye SSS o Updated logo and style Updated with details of operation with Type 6 sensors 13 Contact I nformation Cambridge Integrated Circuits Ltd 21 Sedley Taylor Road Cambridge CB2 8PW UK Tel 44 0 1223 413500 info cambridgeic com 14 Legal This document is 2009 2012 Cambridge Integrated Circuits Ltd CambridgelC It may not be reproduced in whole or part either in written or electronic form without the consent of CambridgelC This document is subject to change without notice It and the products described in it Products are supplied on an as is basis and no warranty as to their suitability for any particular purpose is either made or implied CambridgelC will not accept any claim for damages as a result of the failure of the Products The Products are not intended for use in medical applications or other applications where their failure might reasonably be expected to result in personal injury The publication of this document doe
31. indow This will be apparent if clicking on the control has no effect 4 3 Checking Software Version Number To check the version number of applications click on Help and select About The About window includes the version number of the CambridgelC CTU Software as illustrated in Figure 17 FY About vi CambridgeIC CTU Software version 2 1 2007 2010 Cambridge Integrated Circuits Ltd Built with Labview 2007 National Instruments Corporation Figure 17 checking software version number 4 4 Selecting a CTU in a Multi CTU System Several CTU chips may be connected to the CTU Adapter s SPI bus using additional circuitry to allow the CTU Adapter to switch between them In this case the applications which communicate with CTU chips have provision to select which one they communicate with The relevant controls are illustrated in Figure 16 and may be located by scrolling down below the default window contents The Multi CTU Support control selects how multiple CTU chips are Supported When a single CTU chip is connected directly to the CTU Adapter this should remain at the default value of 0 If an SPI Expander is used with CTU selection using 12C the control should be changed to 1 The CTU to Select control then selects which CTU chip to communicate with Both controls only take effect once when first run so the application must be stopped and re started for changes to take effect Document part no 033 0007 0009 Cambridge Integra
32. ls Window Help Figure 22 CTU Repeat Average screen shot Click on Activate save window to launch the Save to File window which is described in section 7 Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 16 of 31 CambridgelC CTU Software User Guide Cambridge IC 7 Save to File This window is activated from either CTU Demo or CTU Repeat Average and is illustrated in Figure 22 It allows CTU measurements to be saved to a file as tab delimited text The file that is generated may be opened as a text file by Microsoft Excel Mathcad or other applications for processing and presenting the data When launched the application prompts the user for a results file name and location This may be a new or existing file The file can be changed by pressing the New results file button It is recommended to use the file suffix txt for saved data Every time a new file is selected the application writes a header row to the file which labels each column of data The Write header row button may also be activated to write a header row next time data is saved The Text to save table is updated by the source application Header information is on the left and data on the right There are two saving modes When active Save continuously streams data to file as it arrives Save selected number saves the number selected in the Number to save control The default is 1 sample so that each time the Save selected number button
33. n Add or Remove Programs Scroll down the list of installed applications and click on CambridgelC CTU Software Click the Remove button to remove the software Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 10 of 31 CambridgelC CTU Software User Guide Cambridge IC 4 Operation of Applications 4 1 Starting and Stopping The CambridgelC CTU Software appears as shortcuts from the PC s start gt All Programs menu when installed with default settings When launched the applications will run automatically They may be stopped by the STOP button and re started by clicking on the Run arrow as illustrated in Figure 15 EJ CtuDemo_ x vi Se eee O none 1 SPI Expander b Run J KCambr idge IC i Stop Figure 16 Multi CTU support Figure 15 Run and STOP buttons Multi CTU support Window 4 2 Changing Settings The CTU Applications include controls which modify the system s behaviour Some of the changes take effect immediately when the system is running for example changes to PWRDN in CTU Demo Other controls used for initial system configuration only take effect when the application is run To make changes stop the application make the change and run it again Some applications launch a second window for example CTU Demo launches Display Type 1 or 2 Results Depending on the PC it may be necessary to stop the applications to make changes to controls in the original w
34. n absolute mode Incremental not allowed or incremental mode Incremental allowed When operating in incremental mode the CTU chip uses absolute measurements to determine angular position until Valid then takes measurements only from the fine sensor coils to update absolute position each sample This mode is only suitable when the angle change per measurement is less than half the SinLength angle otherwise the system may skip a fine period resulting in an angle error that is only cleared on the next absolute measurement Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 14 of 31 CambridgelC CTU Software User Guide Cambridge IC PCs do not have well controlled timing and may leave long gaps between measurements so incremental operation is not recommended for normal testing with a PC When running the Display Type 6 Results window displays measurement results for each sensor The Valid indicator shows when the target is in range Reported Position is indicated in degrees with a digital display and dial indicator Two amplitude readings are displayed Amplitude A is determined from the fine sensor coils and Amplitude B from the coarse References to Amplitude alone relate to Amplitude A In absolute mode BA Mismatch displays the difference in reported angle between fine and coarse sensors and is an indication of system health In incremental mode BA Mismatch displays the difference in angle between succes
35. n choosing a file the dialog box gives the option to cancel If this is pressed the next window will give the option to continue or stop Always press continue otherwise the application will not close communication with the Adapter correctly and an error will occur next time a CTU Application is run 7 1 Importing Data into Microsoft Excel Microsoft Excel is useful for processing data and displaying the results in graphs The following description is for Microsoft Excel 2007 The procedure for earlier versions is similar There are two methods of importing saved data into Microsoft Excel The first method is to select Open from within Excel then change Files of type to txt or the file extension used when saving the data then click Open Change the file to Excel format when saving to preserve any non text additions made or copy and paste the data in to an Excel workbook It is also possible to right click on the text file from a file browser and select Open With then Microsoft Office Excel The second method imports data directly into an open Excel worksheet Select Get External Data from the Data tab and click on From Text Change the Files of type control if necessary Select the file and click Import Click Delimited then click Next and check the tab box in the Delimiters box Click Next then Finish then select the top right cell where the data is required Excel may fail to include thousandths of seconds when interpreting the time Thousand
36. nt Turn off multi CTU Support see section 4 4 Error 5013 SYSID CTU firmware update was Try uploading CTU firmware again Ox1OAD CTU firmware interrupted while in progress missing Error 5107 Failed mid stream CTU does not report A sensor or excitation coil Check sensor and its connections VALID when a target is connection is missing or shorted present Upload CTU firmware A Type 2 sensor is being used with Change Sensor Type to match the sensor type Sensor Type set to 1 connected The CTU is measuring a different Check that Sensor number matches the CTU Type 1 sensor input number that the sensor is connected to The CTU is measuring an invalid Check that Sensor number is set to 1 for a Type Type 2 sensor number 2 sensor CTU s excitation circuit not workina Check the circuit conforms to the CTU datasheet The target is not working The target s frequency has been Check for metal closer to target and sensor than changed by nearby metal beyond specified in their datasheets the CTU s tuning range Misaligned target Check sensor datasheet for correct alignment Reported position does A sensor coil connection is missing Check sensor and its connections not change smoothly or shorted Try a different target with target position A Type 1 sensor is being used with Change Sensor Type to match the sensor type Sensor Type set to 2 connected Reported position Incorrect value of Sin Length for Check t
37. of 31 CambridgelC CTU Software User Guide Cambridge IC 9 Update Adapter Firmware This application updates the CTU Adapter firmware This enables new features or bug fixes to be uploaded Figure 32 illustrates the application s window Press the Run button if the application is not already running The application prompts for the location of the file to program The file and location may also be changed by pressing the Change Adapter Firmware File button The Adapter Firmware File comments box displays the file s header information including version information Press the Update Adapter with firmware button to start the upload process The process usually takes less than 5 seconds If successful the Adapter and DLL info box show the updated version information The Software Version box includes version information for the newly loaded firmware Once correctly programmed this should match the version information in the Adapter Firmware File s comments section The update process does not change the bootloader d UpdateAdapterFirmware_2 x vi Update Adapte Firmware Change Adapter Firmware File C CamIC Confiquration 020 0002 Adapter Firmware 020 0002_002 003 aff Build Date Wed Mar 24 16 58 16 2010 The last 2 bytes of the binary data are the ct n of this file exduding any lines begining with a palaces No comment lines are present after this comment block V2 03 build 0001 Wed Mar 24 16 58 12 2
38. ontrols which of the CTU s user los each Position Trigger activates PTmDIR controls whether the Position Trigger is activated when measured position passes the Position Trigger Position in a Positive direction Negative direction or Both PTmACT controls the Action that the CTU takes on a Position Trigger event The options are Activate which pulses the IO active PosLnegH which sets the IO low if the trigger was positive or high if negative PosHnegL which has the opposite effect or Toggle which toggles the los state between high and low PosLnegH and PosHnegL are usually used in pairs to set and reset los as a function of position PtmE is a block of enables for each Position Trigger and each sensor PTmF is a Set of flags reflecting whether or not Position Triggers have occurred To clear a Position Trigger over the SPI interface set the appropriate button to Clear Position Triggers can also be cleared by the CTU by setting the PTAUTOCLR bit to Auto Clear This is usually appropriate when the CTU is to generate IO pulses on each Position Trigger Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 26 of 31 CambridgelC CTU Software User Guide jx Cambridge IC The HYSTERESIS control is used to prevent multiple activations of Position Triggers due to noise which can happen when the measured position coincides with a Position Trigger Position A small value such as 0x0100 for a Type 1 sensor is uSually suffici
39. oo00_ 0000_ f0000__ f0000_ Window gt cru gt Window d A _ e xfer _ Pe A 8000 fgo00 8000 xfoo00 0000 a ee eae 000 a oe iE 0000 xfoo00 xl0000 xl0000 xfo000 _ 0000 aooo pooo o000 _ Jo000 0000 _ g an foo00 fo000 0000 o000 o000 _ 0000 0000 0000 J jo000 0000 0000 0000 Jooo x o000 0000 0000 _ 0000 0000 oo00 xfoo00 0000 foo00 foo00 xfoo00 oe oe ee al 0000 0000 0000 x oo00 Figure 24 CTU Control Panel screen shot left hand side ti Ji ii The controls to the top right of Figure 23 are for transferring settings between files the CTU and the application s window To change the files used for retrieving and saving settings click on the browse button to the top left of the CTU Register File Source and CTU Register File Destination controls respectively File gt Window updates the application s window with data from a CTU Register File crf Window gt File saves the data in the window to file Window gt CTU transfers all of the register settings shown in the window to the CTU Document part no 033 0007_0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 19 of 31 CambridgelC CTU Software User Guide Cambridge IC CTU gt Window reads the CTU s register contents and updates the window accordingly Window gt CTU gt Wind
40. ow transfers data from the window to the CTU and then reads back the CTU register contents and places them in the window Window gt CTU Defaults takes the settings from the window and writes them to the CTU It then makes the CTU perform a Save operation which results in these settings becoming the new Configurable Defaults The CTU will then reset itself After this reset and each subsequent one the CTU will load these Configurable Defaults into its registers To configure CTU chips for autonomous operation from file first use File gt Window to transfer the file contents to the window then press Window gt CTU Defaults to save them to the CTU Note that CTU chips allow a large number of such updates to internal non volatile memory but not limitless Please see the CTU datasheet for more information Pressing the Factory gt CTU button causes the CTU to revert to factory default register settings on each subsequent reset As with the Window gt CTU Defaults setting this operation may be performed on CTU chips a large but not limitless number of times 8 1 CTU Control Panel Info Tab The Info tab includes version information for the CTU Adapter and CTU chip It also displays the text header of any CTU Register File that has been loaded 2 01 build 001 Figure 25 CTU Control Panel screen shot I nfo tab Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 20 o
41. re not VALID The DACSON button must be set to NO when no DAC is connected and to YES when DAC output is required The DACEN bits are sensor specific When a sensor s DACEN bit is enabled the DAC will be updated with values based on that sensor The function of the DACOP control is specific to each type of DAC Settings generally include a low power mode and provision to synchronise the outputs of DACs having multiple outputs DACADDR applies to DACs with multiple outputs and defines which of those outputs each sensor s data is addressed to DACNV controls the DAC output when sensor measurements are not VALID in conjunction with NVMODE Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 24 of 31 CambridgelC CTU Software User Guide Cambridge IC 8 6 CTU Control Panel DAC Transfer Function When an external DAC is connected to the CTU the DAC Transfer Function describes the relationship between sensor measurements and the DAC output s Its tab is shown in Figure 29 This is arranged in 4 columns each representing one sensor connected to the CTU Ed CtuControlPanel_ x vi E or File Edit Operate Tools Window Help CTU Control Panel Info System Measurement Sample Indicators amp LEDs DAC Control DAC Transfer Fn Pos Trig Control Pos Trig Positions 3 DACPOSA D x 4sensors positions of start and end of up and down slopes as Measured position gt DAC value transfer
42. s not imply any license to use patents or other intellectual property rights Document part no 033 0007_0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 31 of 31
43. s whether the last measurement on that sensor was valid or not To be valid an appropriate target must be in range of the sensor and the CTU must have performed a sufficient number of measurements to lock onto the target s resonant frequency SinLength scales the raw position output from the CTU CTU Reported Position into physical units such as degrees or millimeters Reported Position see Equation 1 in section 5 1 There is a separate control for each sensor Type Type 1 and 4 share a control which has up to 4 active elements one for each sensor connected The Results indicators at the bottom of the Measurements tab show measurement results based on readings taken from the CTU s results registers There are two set of results indicators The appropriate one is updated depending on the Sensor Type All Sensors setting to the top left of the CTU Control Panel window 8 4 CTU Control Panel Sample Indicators and LEDs The Sample Indicators and LEDs tab is shown in Figure 27 Ed CtuControlPanel_ x vi Bel i i Fie Edit Operate Tools Window Help Control Panel Fa r ame eooo 0 oe fo oe O ine lt o Noe e 1 ior Jo ZlNone Jo None fo 3fNone Figure 28 CTU Control Panel Sample I ndicators and LEDs tab The Sample Indicator Control Register SIC controls Sample Indicators There are controls for up to 4 sensors arranged from left Sensor 1 to right sensor 4 SMAP determines which of the CTU s User
44. shot The upload process is performed over the CTU s SPI interface and the process is documented in its datasheet It is therefore also possible to implement firmware upload through the host processor in a customer s own product Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 29 of 31 CambridgelC CTU Software User Guide Cambridge IC 11 Troubleshooting Guide symptom __ _ Possible cause Rectification Eror S001 DEVICE Adepter not alagued inte US poit Adapter driver not installed Install driver see section 2 3 Adapter driver disabled Re Enable driver see section 2 4 Adapter not yet enumerated Wait 5 seconds between plugging in the Adapter and running any application that uses it Error 5004 Read Adapter power selector link missing Check there is a link selecting between 2V7 3V3 timeout and 3V6 fitted through the Adapter s rear panel Error 5008 Adapter USB communications with the Close down the application and run it again Error Adapter were not properly closed before it was stopped Unplug the Adapter from the PC s USB port then olug it back in again and wait 5 seconds Error 5012 Did not get Adapter to CTU SPI interface not Check SPI connections expected SYSID from properly connected CTU CTU chip not powered Check power is supplied to the CTU by the Adapter or other means SPI Expander not working Check SPI Expander if used SPI Expander not prese
45. sive measurements In each case healthy values are less than 40 of SinLength Relative Freq Hz displays the frequency difference between the CTU chip s nominal centre frequency 187 5kHz for the CAM204 and its measurement of the target s resonant frequency Table 1 SinLength values for Type 6 sensors SinLength 6 CTU Repeat Average In this application the CTU take a number of measurements on a selected sensor and displays average readings Averaging improves resolution and reduces noise in the averaged output This application demonstrates the improvement in resolution It may be used to take higher resolution measurements than CTU Demo The Requested Num VALID control selects how many CTU measurements to base the average on A larger number results in improved resolution and lower noise in the Position Average output at the expense of update rate In addition to average values the application also displays statistics based on the set of samples acquired for each averaged measurement For example Position Std Dev is the standard deviation of the incoming reported positions and Position Pk Dev From Average is the peak deviation from the average value These are useful measures of the noise present in the CTU s output and hence of system performance For meaningful noise statistics it is recommended to set Requested Num Valid to 64 or more Note that peak and standard deviation measurements are based on incoming data and are not m
46. taller If a customer wishes to develop their own PC applications for communicating with the CTU through the CTU Adapter using programming languages such as Visual Basic or C the DLLs can be used for communication Please refer to the CTU Adapter Class Library User Manual for documentation on this approach If available it is recommended to use LabVIEW since the CTU LabVIEW VIs allow programming at a higher level The Adapter requires a Windows driver whose installation is described in the next main section 1 2 Document Conventions The names of CTU software applications and DLLs are highlighted like this CTU Demo The names of window controls and indicators are shown like this Next Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 2 of 31 CambridgelC CTU Software User Guide Cambridge IC 2 Windows CTU Adapter Driver This section describes how to install the Windows Adapter Driver required for the PC to communicate with the CTU through the CTU Adapter There are actually two drivers one used by the applications themselves and one that exposes a virtual COM port VCP for debug purposes It is convenient to install them together although the VCP driver is not required for normal operation 2 1 Automatic Installation Windows 7 CambridgelC s CTU Adapter is supported by Microsoft Update The latest version should install automatically when a CTU Adapter is plugged into a Windows 7 PC that
47. ted Circuits Ltd 2009 2012 Page 11 of 31 CambridgelC CTU Software User Guide 7 Cambridge IC 5 CTU Demo This application reads and displays measurements taken by a CTU chip It is controlled by the window illustrated in Figure 18 The info boxes contain CTU Adapter and DLL version information Measurement results are displayed in a separate window Figure 19 illustrates the window for a Type 1 sensor as Shipped in the CTU Development Kit Change the Sensor Type control if different sensor s are attached to the CTU chip To make changes to settings press STOP then press the Run button to start again Ed CtuDemo_2x vi File Edit Operate Tools Window Help Phy 3k Cambridge IC System Version 0400 stor Bootloader Version l 0206 Actual updates per Adapter and DLL info second limited by PC system ID Description Serial Number 72 ABCD CambridgeIc CTU Adapter SNTCT Ong Software Version 0001 Sensor Type V2 03 build 0001 Wed Mar 24 16 58 12 2010 said rh SYSI interval in Bootloader V2 01 build 001 7j d 10 continuous mode ms CambridgeIC BLl Version Vendor ID Product ID Single shot PC Timing mode l 1 4 0 0 A850 PWRDN inactive Power down mode Figure 18 CTU Demo screen shot Eq Display lype1Results_ x vi File Edit Operate Tools Window Help 7x Cambridge IC sred Sensor 1 controls Sensor 2 controls Ferra Sensor 4 controls State l 360 00 Sin Length CTU Reported Position 4 16384 16338
48. ths of seconds are usually important for the time difference between two cells This can be calculated in Excel using Time dif ference in seconds between cell B and cell A 24 x 60 X60 x cell B cell A The result should be formatted as a number in Excel not a time Click on the equation result and select number from the home tab and change to number format with the required number of decimal places 7 2 Importing Data into Mathcad Mathcad can also be used to read data generated by Save to File Its READPRN function only imports numbers Recent versions of Mathcad e g version 14 can accept files that include a mixture of numbers and text The result is typically a data array that excludes header information the Source Application column and the comments column if it includes non numeric text Mathcad may import the first digits of date and time information but not the complete field If the time field is required it is recommended that the file is opened using Excel and the time field is converted to a number using Excel as described above before re saving the file as text Document part no 033 0007 0009 Cambridge Integrated Circuits Ltd 2009 2012 Page 18 of 31 CambridgelC CTU Software User Guide Cambridge IC 8 CTU Control Panel CTU Control Panel is for the manipulation of CTU register settings These can be saved to file retrieved from file viewed and manipulated on screen CTU Control Panel is particularly us

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