AN-878 High Speed ADC SPI Control Software
Contents
1. device are in a desirable state they can be saved in a file for future use This is accomplished by selecting Cal Save As and supplying a new file name when prompted DOWNLOAD FILES FROM FTP SITE This option allows new configurations to be directly down loaded from the Analog Devices Inc public FTP site This is the quickest and easiest way to ensure that the configuration files and the executable files in use are completely up to date Similarly if you have an evaluation board without a configuration file this is the first place you should look When you click this option you are given notice that data will be copied from the Analog Devices public FTP site with the option to cancel if desired If you select Yes the program saves your current configuration exits the program executes the update program and then reruns the program taking care to reload your last configuration Alternatively configurations may be manually downloaded from the product website at www analog com or you may request them by contacting highspeed converters analog com and asking for the latest SPI configuration file for the device EXIT To close down the SPI Controller program click Exit Rev A Page 7 of 20 AN 878 CONFIGURATION MENU Config Help Controller Dialog Script Dialog Launch Page Readback Launch ASM Code Generator Launch Cal Comparator 05949 007 Figure 8 Config Menu CONTROLLER DIALOG SPI CONTROLLER CFG DIALOG Thi2. 2 cfg My Computer Hi 259 _146it_SOMSspiR 02 cfg My Documents File name Files of type Cfg files cfa 05949 002 Figure 2 File Browsing Rev A Page 4 of 20 AN 878 DEVICE CHECK Once the appropriate configuration file is selected the evaluation board status is tested The device installed on the evaluation board is also checked If errors are reported the software continues to run after clicking OK in response to the warning messages The software first checks for an available HSC ADC EVALB xx No USB duetus cable possibly or HSC ADC EVALC data capture board If this board is not l connected an error message see Figure 3 displays and a read test failure occurs If the cable is correctly connected the user may click Ignore see Figure 4 to conclude the start up sequence otherwise the start up sequence repeats once to allow the user to make cable connections If the error is due to an incorrect chip select 05949 003 Figure 3 Typical USB Error Message assignment the chip select can be changed after the software finishes the start up sequence When a data capture board is located the software checks to see which ADC is connected to the board If the correct configuration file is not selected or if an incorrect board is connected an Read TestFailure Chip ID is not known error message displays with the requested device name listed NowDUT willnot proceed Check Chip Select or di
3. ANALOG DEVICES AN 878 APPLICATION NOTE One Technology Way P O Box 9106 Norwood MA 02062 9106 U S A Tel 781 329 4700 Fax 781 461 3113 lt www analog com High Speed ADC SPI Control Software by the High Speed Converter Division FEATURES Simple user interface for all standard high speed ADC devices with SPI capability Simplifies evaluation of high speed ADCs Automatic generation of end use C source code Automatic generation of assembly code for PIC12F629 Used with high speed ADC evaluation boards Allows access to all user controlled features Works in conjunction with VisualAnalog ADC Analyzer and ADC data capture board Standard USB port interface Built in web update feature Configuration files available from www analog com EQUIPMENT NEEDED PC running Windows 98 2 Ed Windows 2000 Windows ME or Windows XP USB 2 0 port recommended USB 1 1 compatible Data capture board HSC ADC EVALB SC HSC ADC EVALB DC or HSC ADC EVALC Compatible high speed ADC evaluation board GENERAL DESCRIPTION The high speed ADC SPI program version 2 and version 3 SPIController exe allows the user to control advanced features on high speed analog to digital converters ADC with SPI capability This advanced controller program is used in con junction with the HSC ADC EVALB or HSC ADC EVALC data capture boards and specific device evaluation boards to manipulate and control SPI accessible features More info
4. C 00 SPIwrite 0021 00 SPIwrite 0022 00 FTZADC D SPIwrite 0008 00 SPIwrite 0009 01 SPIwrite 000D 00 SPIwrite 000F 60 SPIwrite 0014 00 SPIwrite 0015 00 SPIwrite 0016 03 SPIwrite 0018 03 SPIwrite 0019 00 SPIwrite 001A 00 SPIwrite 001B 00 SPIwrite 001C 00 SPIwrite 0021 00 output adjust 2 7 2006 10 40 11 PM output phase 2 7 2006 10 40 11 PM wref 2 7 2006 10 40 11 PM user pattl lsb 2 7 2006 10 40 11 PM user pattl msb 2 7 2006 10 40 11 PM user patt2 lsb 2 7 2006 10 40 11 PM user patt2 msb 2 7 2006 10 40 11 PM serial control 2 7 2006 10 40 11 PM serial ch stat 2 7 2006 10 40 11 PM modes 2 7 2006 10 40 11 PM clock 2 7 2006 10 40 11 PM test io 2 7 2006 10 40 11 PM jjade input 2 7 2006 10 40 11 PM output mode 2 7 2006 10 40 11 PM output adjust 2 7 2006 10 40 11 PM output phase 2 7 2006 10 40 11 PM wref 2 7 2006 10 40 11 PM user pattl lsb 2 7 2006 10 40 11 PM user patti msb 2 7 2006 10 40 11 PM user patt2 lsb 2 7 2006 10 40 11 PM user patt2 msb 2 7 2006 10 40 11 PM serial control 2 7 2006 10 40 11 PM serial ch stat 2 7 2006 10 40 11 PM modes 2 7 2006 10 40 11 PM clock 2 7 2006 10 40 11 PM test io 2 7 2006 10 40 11 PM adc input 2 7 2006 10 40 11 PM output mode 2 7 2006 10 40 11 PM output adjust 2 7 2006 10 40 11 PM output phase 2 7 2006 10 40 11 PM wref 2 7 2006 10 40 11 PM user pattl lsb 2 7 2006 10 40 11 PM user patt
5. Iwrite 0018 03 SPIwrite 0019 00 SPIwrite 001A 00 SPIwrite 001B 00 SPIwrite 001C 00 SPIwrite 0021 00 SPIwrite 0022 00 BDC B SPIwrite 0008 00 SPIwrite 0009 01 SPIwrite 000D 00 SPIwrite 000F 60 SPIwrite 0014 00 iehip pott contig 2 7 2006 10 40 11 PM device index 2 2 7 2006 10 40 11 PM device update 2 7 2006 10 40 11 PM modes 2 7 2006 10 40 11 PM clock 2 7 2006 10 40 11 PM test io 2 7 2006 10 40 11 PM fedc input 2 7 2006 10 40 11 PM output mode 2 7 2006 10 40 11 PM output adjust 2 7 2006 10 40 11 PM output phase 2 7 2006 10 40 11 PM vref 2 7 2006 10 40 11 PM user pattl lsb 2 7 2006 10 40 11 PM user patti msb 2 7 2006 10 40 11 PM user patt2 lsb 2 7 2006 10 40 11 PM user patt2 msb 2 7 2006 10 40 11 PM serial control 2 7 2006 10 40 11 PM serial ch stat 2 7 2006 10 40 11 PM modes 2 7 2006 10 40 11 PM clock 2 7 2006 10 40 11 PM test io 2 7 2006 10 40 11 PM adc input 2 7 2006 10 40 11 PM output mode 2 7 2006 10 40 11 PM Rev A Page 10 of 20 SPIwrite 0015 00 SPIwrite 0016 03 SPIwrite 0018 03 SPIwrite 0019 00 SPIwrite 001A 00 SPIwrite 001B 00 SPIwrite 001C 00 SPIwrite 0021 00 SPIwrite 0022 00 ADE C SPIwrite 0008 00 SPIwrite 0009 01 SPIwrite 000D 00 SPIwrite 000F 60 SPIwrite 0014 00 SPIwrite 0015 00 SPIwrite 0016 03 SPIwrite 0018 03 SPIwrite 0019 00 SPIwrite 001A 00 SPIwrite 001B 00 SPIwrite 001
6. ODEN OFF amp WDT OFF amp MCLRE ON amp WDT OFF amp _PWRTE ON amp INTRC OSC NOCLKOUT Parameters for the configuration register Define Port Variables and pin assignent define SCLK GPIO 0O defines clock pin in GPIO 0O SPI clock define CSB GPIO 2 defines CSB pin in GPIO 2 Chip enable signal define SDO GPIO 1 defines SDO pin in GPIO 1 SPI data in define LED GPIO 4 defines LED pin in GPIO 4 LED indicator for busy state OXkckckckck sk sk ck ck k k kk kk kk Variable Definitions kx kk kk kk ke Variables are stored in these general purpose registers upperaddress EQU 0x20 loweraddress EQU 0x21 SPIdata EQU 0x22 bitcounter EQU 0x23 byte EQU 0x24 ORG 0x000 calibrate internal oscillator with factory settings Initialize all internal peripherals and ports for SPI functions bcf STATUS RPO Select Bank 0 clrf GPIO Initializes GPIO register movlw 07h Setting up value for comperator module lt CM2 CM1 CM0O gt lt 111 gt movwf CMCON comparator module off digital out bsf STATUS RPO select Bank 1 movlw b 00001000 literal to set all port pins as output except for GPIO 3 reset movwf TRISIO direction bits moved to TRISIO bcf STATUS RPO clear register bank select Rev A Page 14 of 20 AN 878 CkCkckckckckckckckckckckck ckckckckckckckckckckckckckckckckckckckckckck ckckckckckckckckckckckckckckckckckck kk Initializes outputs INIT bsf CSB sets CSB bcf SCLK clears SCLK bcf SDO clears SDO bcf LED
7. STATUS register btfsc STATUS C goto SDO HIGH SDO LOW bcf SDO Set SDO low goto clk high SDO HIGH bsf SDO Set SDO high clk Nigh bsf SCLK decfsz bitcounter F goto loop retlw 0 send byte subroutine ends End of program sleep END LAUNCH CAL COMPARATOR This feature launches a window that allows two different calibrations to be compared These include the following calibrations DUT Default to Current State DUT Default to a Specified File and Current State to Specified File The advanced user will find this feature helpful for comparing any two settings for differences Rev A Page 17 of 20 AN 878 HELP MENU Help Current Files Rev History USB Info Help Topics SPI Controller User Manual ADC SPI Protocol User Manual 05949 010 Figure 13 Help Menu CURRENT FILES The Current Files menu provides a summary of important file names used in various parts of the program see Figure 14 These file names can be changed using the Config menu see the Script Dialog section Changes can be made to Cfg and Cal files as well as scripting and dialog files SPI Files Dialog OK Device Cfg Filename _0x AD9228spi cfgl Device Cal Filename AD9228spi cal Script Filename ADS228spi svr Seript Log Filename AD9228spi sel ASM Filename AD5228spi asm Figure 14 SPI Files Dialog Box Device Cfg Filename This file used to configure the program for the device contains the registers and bi
8. USB cable Click OK to indicate that the program should continue without Cfg should be re loaded the hardware 05949 004 Figure 4 Chip ID Error Message Chip IDand config file device name do not agree Please load the AD9247 config file 05949 016 Figure 5 Chip ID Error Message Rev A Page 5 of 20 AN 878 SPI CONTROL PANEL The SPI control panel provides a graphical way of interacting with the device connected to the SPI interface Because each device can have a different set of registers the user interface varies from part to part For details on each feature refer to the AN 877 Interfacing to High Speed ADCs via SPI application note Consult the device data sheet to determine which features are available for each device This application note provides an overview of the software capabilities and does not attempt to address the implications of each available device function Each tab on the SPI Controller user interface contains a different set of controls The Global tab contains features that apply globally to the SPI device and is limited to the configuration of the physical interface for features such as SPI interface LSB first or chip soft reset The settings of all controls indicate the state programmed into the chip r Eo LESE CZ E38 3 Global ADCBase 0 apc A apc B ADCC ADCD FCO DCO Common ADC features are found on the ADCBase 0 page accessible by selecting the ADCBase 0 tab If
9. am from one of two available methods e From the Start menu under Analog Devices select the SPIController AN 878 e Double click the SPIController desktop shortcut The software checks to ensure that hardware is present and that a SPI compatible device is connected to the evaluation board If the hardware is not present and or the correct device is not connected a series of warning message may be displayed Although warnings are provided the program continues to run The first time the program is run it prompts for a configuration file after several warnings are displayed The file browser displays available configurations If available configurations are not displayed set the browser to the location on the hard disk where the configuration files are stored This is usually the installation directory Additional configuration files can be downloaded from the product page at www analog com or are shipped with your evaluation board For the most up to date configuration files web updates are also available See the Download Files from FTP Site section of this application note Ifyou still cannot locate the desired configuration file email Analog Devices at highspeed converters analog com and request the latest SPI configuration file for the device If the program has run before the last configuration selected is used To change the configuration open the File menu and select Cfg Open Select the file corresponding to the selected
10. andere ae esa t asd Pocta 18 Current FMCG V iii Ust dana a 18 Device to Bilendtie oin DU SUAE RM 18 Device Cal Hll n i oec acea e UR Od 18 Serpe FIENO acie ia dH enda 18 Script Log Filenaiie etre RR OP RAE 18 ASM Filename soos ease 18 gaius dace 18 U Bilnio a e na usa sa Rss mms 18 Help TODICS aussen onn dadaisti 18 SPI Controller User Manuali iterato reed ete 18 ADI SPI Protocol User Manual ere emet es 18 tiir T H 19 Rev A Page 2 of 20 QUICK START The SPI controller program SPIController exe provides access to high speed converters that are SPI enabled Running this program opens a window that provides complete control of available functions of the converters For available functions and full programming details see the AN 877 Interfacing to High Speed ADCs via SPI application note Because supported features vary by device refer to the specific device data sheets Although this application note explains the features of the SPI controller program it does not fully document SPI INSTALLING THE PROGRAM Although this program runs without hardware attached it does require the HSC ADC EVALB or HSC ADC EVALC boards to be fully functional These data capture boards include an SPI Controller and are required to interface to SPI enabled high speed converter evaluation boards Consult the specific device data sheets to determine compatibility Install the SPI Controller
11. ared It is useful when debugging to see what commands were issued to the device that may have or may not have worked ASM Filename When the PIC12F629 assembly code generation option is selected this file is written to See the AN 812 application note for more details on this file REV HISTORY This option provides details of the history of this software USB INFO This option provides details of the USB driver HELP TOPICS This option provides guidance on a limited set of the program features SPI CONTROLLER USER MANUAL This option opens the PDF version of this application note installed on the PC ADI SPI PROTOCOL USER MANUAL This option opens the AN 877 Interfacing to High Speed ADCs via SPI application note Rev A Page 18 of 20 TOOL BAR AN 878 Table 2 defines the buttons on the SPI Controller tool bar see Figure 15 Not all features are available with all devices in all modes DAN Di BS Figure 15 Tool Bar 05949 012 Table 2 SPI Controller Tool Bar Tool Transfer En Async Xfer New DUT Update DUT Update Controller USB Refresh em IB El m ia Symbol Description The Transfer button programs the on chip registers with the current values in the program If the script file is enabled C code generator this file is written to at the same time but log files are inhibited When the program is launched this button is disabled and grayed out indicating th
12. at asynchronous transfers are enabled If asynchronous transfers are disabled this control is enabled and all registers on chip are simultaneously updated when the n button is pressed This button toggles between asynchronous transfer and synchronous transfer The default mode for this control is asynchronous transfer which means that as a button text box or other control is changed the information is immediately passed to the DUT When in synchronous transfer mode changes are not made until the Transfer button is pressed When asynchronous mode is enabled the Transfer Button is disabled If script files are enabled they are inhibited If log files are enabled they are updated This button reinitializes the DUT interface and issues a device soft reset to Register OOh In addition the Chip ID is read to ensure that the correct device is recognized If Use defaults on New DUT is checked on the SPI Controller Cfg Dialog box then the chip defaults are used instead of the values currently shown in the software Updates the registers on the DUT to match those in the controller software This feature is useful if the device is powered down without exiting the software Updates the SPI Controller program to match those in the DUT This feature is useful if the program was exited and restarted but the device was not powered down This button reestablishes communications with the USB interface if it has been broken due to power down or a cable bei
13. by one of the following methods e The SPI Controller program can be installed as part of ADC Analyzer version 4 9 0 and later This program provided on CD with the data capture board can also be downloaded from www analog com fifo Insert the disk or run the downloaded file to install both applications e A separate SPI Controller installation program is available from www analog com fifo This installation does not include ADC Analyzer Download the zip file and then extract it to a temporary directory Run the setup exe application and follow the instructions that display e A separate installer the most current version available can be found at ftp analog com pub adispi A2DComponents Install After installing the software follow these steps 1 Windows must register the drivers To accomplish this set up the HSC ADC EVALB xx or HSC ADC EVALC data capture board Although it is not necessary to have an ADC evaluation board connected at this point if one is available this is a good time to install it 2 Turnonthe HSC ADC EVALB xx or HSC ADC EVALC board and the ADC evaluation board if connected 3 Connect the USB cable between the computer and the HSC ADC EVALB xx or HSC ADC EVALC board Windows then recognizes the evaluation board and registers the drivers After driver registration is complete the software is ready to use once Windows indicates that the new hardware is ready to use RUNNING THE PROGRAM Run the progr
14. ce code The format follows standard C C syntax If the software is included as part of an end application the user must supply the hardware specific read and write utilities This feature helps users understand how to program the device The example code that follows shows a typical programming sequence as written to a script file These files are annotated and they describe the sequence of setting the file Sex 05949 009 Figure 10 SPI Files Dialog BoxTypical C Source Code Generated The following code exemplifies usage of the generated script or log file declarations for wrapper functions x void SPIwrite int address int value int SPIread int address definitions of wrapper functions x x void SPIwrite int address int value ie place compiler specific write function here i e ie void write int address int value int SPIread int address Rev A Page 9 of 20 AN 878 place compiler specific read function here i e A int read int address t sample pgm k kkk kk kkk kkk kk kk kk k k k k void main int x ki SPIwrite 22 4 x SPIread 22 Ey kkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkxkxkk SPIwrite 0000 18 SPIwrite 0005 0F SPIwrite 00FF 00 JADA SPIwrite 0008 00 SPIwrite 0009 01 SPIwrite 000D 00 SPIwrite 000F 60 SPIwrite 0014 00 SPIwrite 0015 00 SPIwrite 0016 03 SP
15. clears LED LED is off clrf bitcounter clear bitcounter register clrf byte clear byte register Since we are performing writing operations and the SPI mode is MSB first 16 bit addressing the first register value which is the instruction register will always be h 00 moviw h 00 movwf upperaddress OkCkckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckokckckckckckckckckckck X CkCkckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckokckckckckckckckckckck X This section of the program is generated by SPIController and will contain the register address and data values the user has specified movlw h 0005 movwf loweraddress movlw h 01 movwf SPIdata call write SPI movlw h 0005 movwf loweraddress movlw h 03 movwf SPIdata call write SPI movlw h 0005 movwf loweraddress movlw h 07 movwf SPIdata call write SPI movlw h 0005 movwf loweraddress movlw h OF movwf SPIdata Rev A Page 15 of 20 AN 878 call write SPI movlw h 0009 movwf loweraddress movlw h 00 movwf SPIdata call write SPI movlw h 0008 movwf loweraddress movlw h 00 movwf SPIdata call write SPI CkCkckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckokckckckokckckckckckckckckckckckckckckckckckckckckc ko kok CkCkckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckckokckckckckckckckckckckckckckckckckckckckckc ko kok This is t
16. device At power up the device should be running with default values in the registers These are typically a nominal state to ensure that the device is functional Because each converter has a different set of supported features the device data sheet should be consulted All devices support at least power down features in the mode setting POWERING DOWN Follow these steps to place the device in power down mode 1 Make sure that the Asynchronous Transfer Enabled u option is selected This ensures that as each control is changed it is immediately sent to the device through the SPI 2 Select the ADCBase ADCBase0 or ADCGlobal 0 tab to display the appropriate page and locate the mode register 0x08h Then under the Int Pwr Dn window click the Full Pwr Dn radio button This shuts the device down by writing the corresponding value to the mode register If a current meter is available this can be observed on the readout 3 Click Chip Run and the device starts again Other features of the device can be explored by clicking the appropriate button check box or text box Commands are sent immediately to the device as long as Asynchronous Transfer Enabled is selected If not enabled then commands are manually issued by clicking the Transfer button For a description of the Transfer button see Table 2 Rev A Page 3 of 20 AN 878 GETTING STARTED The Quick Start section of this application note briefly described configured and
17. edeasddo EPUM PED 8 Enable Auto Update of DLL Cfg Cal files 8 Update Controller From DUT on New DUT 8 Enable Auto Channel Update sss 8 REVISION HISTORY 4 07 Initial Version to Rev A Upddl dFott ts sec o Mex toro tmn es Universal Changed Name of High Speed ADC Controller Quick Start Set Up SPI Section to Quick Start Section 3 Replaced Figure 2 es wre reece ies hod tees E nan aa 4 Changes to Running the Program Section 3 Replaced the Device Check Section sess 5 Replaceq EIoute non uere ha hb Cada menit ene aa d 6 Replaced Figure 7 and Figure 8 sss 7 Peplaced Bloure 9 Gon saws sa CRAS ORE UE 8 3 06 Revision 0 Initial Version Perform New DUT function during NewCal 8 Ignore Transfer function during write 8 Read CnannelIltd u ss aaa saja 8 Error Messages ss ang 8 NSB Ch OR TINS Clean 8 Transfer BEFOE MSEE auo DUM IEEE 8 Parallel Pdft ssadawawwew TOUS tox CO RON DO ENS 8 SEMI DIOS sica EORR HORIS ai 9 Typical C Source Code Generated ss 9 Launch Page READ ACK a soto n Un San na d 13 Launch ASM Code Generator eese 13 Typical PICI2F629 ASM Cod iecore ttp 14 Launch Cal CompdFalOEs ie eere tO WDR 17 Help M fiiseuesso so se an
18. es the completed macro to a file The file used is specified in the SPI Files Dialog see Figure 10 eo The ASM Code Generator dialog box see Figure 12 shows the JO sequence of commands that enables all four ADCs in Index aec PRPPRPRPPRPP chip_port_config chip_id chip_grade device index 2 device update modes clock test io adc input output mode output adjust output phase vret user pattl lsb user pattl msb user patt2 lsb user patt2 msb serial control serial ch stat modes clock test io adc input output mode output adjust output phase U U U U U U U U U U U U U d U U U d U U U U U g Bas g Register 5 disables the duty cycle stabilizer and starts the chip ASM CODE GENERATOR 05949 014 Figure 11 Page ReadBack Dialog Box 05949 015 Figure 12 ASM Code Generator Dialog Box Rev A Page 13 of20 AN 878 Typical PIC12F629 ASM Code This is the SPI control ASM Tile used to configure tbe PICL2F629 for the SPI boot circuit Code for the PIC12F629 SPI boot circuit define version 0 10 Update History Application Description Comments Author Steve Ranta and Alfredo Barriga Hardware Notes list p 12F629 Device Specification include lt p12F629 inc gt Include files registers Variable registers declarations Macros Configuration parameters gt Internal RC oscillator and Watchdog timer disabled CONFIG CP OFF amp CPD OFF amp B
19. features to be enabled To enable a feature select the check box to the left of the feature Enable Auto Update of DLL Cfg Cal files Selecting this feature signals the program to search the Analog Devices public FTP site each time the program is run for the latest program and configuration files Selecting this option requires Internet access and should only be checked if access is available Updates can be retrieved manually by selecting Download Files from FTP Site from the File menu Update Controller From DUT on New DUT When this option is selected the registers on chip is transferred to the controller graphical user interface GUI when the Update Controller From DUT on New DUT button is pressed If this check box is not checked the Update Controller From DUT on New DUT button programs the DUT with the values in the GUI DUT is the device under test Enable Auto Channel Update Checking this check box with multichannel ADCs enables the updating of similar features across multiple channels Perform New DUT function during NewCal When checked the GUI performs a new DUT function when a new calibration file is loaded Ignore Transfer function during write Not all ADCs require that a transfer command be sent after each command or group of commands If this box is checked the automatic transfer generated by this program is suppressed Read Channel Index The value in the Read Channel Index drop down box determines whic
20. h ADC channel is accessed during a readback cycle Error Messages USB error msg en Enables display of USB error messages when they occur When not checked messages are suppressed Transfer error msg en Enables display of transfer messages when they occur When not checked messages are suppressed Parallel Port The parallel port is provided for devices that may not be sup ported by the USB SPI Controller Currently no devices use this interface Rev A Page 8 of 20 SCRIPT DIALOG This option allows the creation of log pseudocode C code and assembly PIC12F629 files to be enabled see Figure 10 The log file is a record of the commands sent to the SPI port during the period where this feature is enabled which functions much like a record macro session Enable or disable this option by checking or not checking the box respectively For historical and documentation purposes this feature is useful in looking back at what commands were sent This file is appended to and continues to be appended to until Clear is clicked a SPI Files Dialog AD3228spi svr ASM Filename ADS228spi asm FTP Site Address ftp analog com pub adispi A2D Components ftp an log com pub dispi A D omponents AN 878 The script file contains the C code file which represents the sequence of data passed to the SPI port of the device This file can be used as a programming reference or can be included in the end application sour
21. he last part of the program Here an UPDATE DEVICE command is executed to transfer data from the buffers to the SPI port Sleep command is executed after all registers have been updated and the device goes to sleep until reset or power on Update register FFh value h 01 movlw h FF movwf loweraddress movlw h 01 movwf SPIdata call write SPI sleep OKCkckckckckckckckckckckck ckckckckckckckckckckckckckckckckckckckckckckckckckckckokckckckckckckckckckckckckckckckckockckckckckckckckckckckckckckckck write SPI jroutane that writes data to the SPI port bsf LED LED turns ON indicating writing process has started bcf CSB CSB pin goes low to start a writing command Write upperaddress movf upperaddress W transfer upperaddress to W register movwf byte call send byte call send byte subroutine Write loweraddress movf loweraddress W movwf byte call send byte write lower address into SPI Rev A Page 16 of 20 AN 878 write data movf SPIdata W movwf byte call send byte bsf CSB CSB is set to end SPI writing operation bcf LED Led turns off bcf SDO clears sdo retlw 0 Write spi subroutine ends CkCkckckckckckckckckckckck ckokckckckokckckckckckckckckckckckckckckckokockckckokckckckckckckckckckckckckckck ckckckckckckckckckckckckckckckckck ck ck ck kk send byte subroutine to send byte to spi port movlw 8 w 8 movwf bitcounter bitcounter 8 loop bcf SCLK clk set low RLF byte F rotate each bit to the left through carry in
22. is selected depending upon which device how to install and run the SPIContoller software and how to you are using power down the device The remainder of this application note 2 Select the configuration file associated with the device provides an expanded explanation on how to use the SPI Controller evaluation board currently connected to the bench software equipment and then click Open Because all ADCs follow When the SPI Controller program is launched for the first time the same SPI protocol and memory map selecting an it begins searching for the required hardware and configuration incorrect configuration does not damage the device and files Warning messages appear if these files cannot be located may actually provide some degree of control Use the correct configuration however to ensure that all features 1 Click OK in response to each of the warning messages available for a given device are accessible until the program prompts for a configuration file The configuration file determines how the user interface is Look in 9 5PlController Backup Ct SPI cfg Documentation C3 AD9211 10Bit 250MSspiengR03 cfg C3 AD9219 10Bit 40MSspiRO2 cfg Cia AD9219_10Bit_65MSspiRO2 cfa 3 AD9222_ 12Bit_40MSspiRO2 cfg L3 AD9222_17Bit_50MSspiR02 cfg L2 AD9228_126it_40MSspiRO2 cfa La AD9228 12Bit 55MSspiR02 cfg Cia AD9233 12Bit 105MSspiR02 cfg C3 AD9233 128Bit 125MSspiR02 cfg C3 AD9246 14Bit 105MSspiR02 cfg PE C3 AD9246_14Bit_125M5spiR0
23. l msb 2 7 2006 10 40 11 PM user patt2 lsb 2 7 2006 10 40 11 PM user patt2 msb 2 7 2006 10 40 11 PM serial control 2 7 2006 10 40 11 PM Rev A Page 11 of 20 AN 878 AN 878 SPIwrite 0022 00 serial ch stat 2 7 2006 10 40 11 PM AUX 0 SPIwrite 0022 00 serial ch stat 2 7 2006 10 40 11 PM AUX 1 SPIwrite 0022 00 serial ch stat 2 7 2006 10 40 11 PM SPIwrite 00FF 01 write transfer bit O SPIread 00FF read transfer bit Rev A Page 12 of 20 AN 878 ASMFilename sets the file name used for the creation of the LAUNCH ASM CODE GENERATOR PIC12F629 assembly code See the Launch ASM Code Generator section for details on how to generate these files Additional information can be found in the AN 812 Microcontroller Based Serial Port Interface SPI Boot Circuit application note The ASM Code Generator is used with the Microchip PIC12F629 on the evaluation board see Figure 12 This circuit can be copied and placed on end user boards for a very low cost SPI controller The code generator is an easy method of collecting configuration data The data is then assembled with the PIC FTP Site Address is the address used by the update software to load compiler and written to the device to initialize the desired the most current executables and configurations Although this conditions Additional details can be found in the AN 812 typically should not be changed this option allows you to do so application
24. ng disconnected Rev A Page 19 of 20 AN 878 NOTES 2006 2007 Analog Devices Inc All rights reserved Trademarks and registered trademarks are the property of their respective owners AN05949 0 4 07 A ANALOG DEVICES Rev A Page 20 of 20 www analog com
25. note when necessary for example if the site is moved in the future LAUNCH PAGE READBACK The Page ReadBack feature allows the on chip memory of the Table 1 ASM Code Generator Buttons connected device to be read see Figure 11 Clicking the Read button initiates the readback and comparison process The display opens in a separate window allowing the main controller window to continue to operate independent of the ReadBack page This makes it easy to change the values and then to verify that the device properly received the data The ReadBack page indicates which tab the register is on a description of the register the address and the written and read values For clarity a pass fail flag is written This feature is useful for debugging a device This feature in conjunction with the main interface allows the complete user memory map to be written to and then explored a Page ReadBack Three buttons shown in Table 1 on the ASM Code Generator dialog box aid in the collection of the configuration data Button Description The Record button begins recording key strokes While recording as controls change their values are recorded in the ASM Code Generator until recording stops When this button is pressed again it changes into the Stop Record button B The Erase button erases recorded commands Use this button to correct commands or to erase commands so that new commands can be entered The Write button writ
26. omatic C code generation for register configuration 4 PIC12F629 Code Generator Automatic code generation for PIC12F629 5 Web Update Feature This feature ensures that both the latest program files and configuration files are always available For more information on using and interfacing to the SPI device see the AN 877 and AN 812 application notes Rev A Page 1 of 20 AN 878 TABLE OF CONTENTS CAME CS s vas tices dca asa thse ss d ai a dnis si gai Equipment Needed cuneta tte ad si General BescfiPlildd esa sea ss l Simplified Functional Block Diagram 1 Brod ct Hiohliohts sssissvesseesssssssssgasssssasssass 1 REVISION ELISEO Ys see vu tates nais si seksa Z OKS 750 4 A OS DA ALDEA ENT 3 lnstalinothe Prosf fis saw GRON ORDEN ER HON 3 Runninp the Program ie p a ERE RR AREE 3 DOWEL DOW egeti eint eene netiis sa d 3 Geine Stabted cosas pen E m gsm 4 Device C hee e siddassacdas anna um 5 SPI Control Patel cacao POPE ORDEN aH 6 HleM fi sesseeddeeoddddeadzdouwddnw www 7 Cie P das as 7 CCT DANG AS tadus pa PME 7 Valdp a E enn ene eer 7 Cal SAVE S voee sam ea DE 7 Download Files from FTP Site esses 7 Dip ss 7 Configuration Men oes sonde tp een 8 Controller Dialog SPI Controller Cfg Dialog 8 FIFO Chip Select Number USB FIFO Channel Number 8 Proer mGOntil
27. r mation on the range of features available can be found in the specific device data sheets and in the AN 877 Interfacing to High Speed ADCs via SPI application note The SPI Controller program can run as a standalone application on a Windows platform or in conjunction with any available data analysis tool such as VisualAnalog or ADC Analyzer The software includes advanced features to ensure a smooth transition from evaluation into prototyping and production When a desired configuration is attained the program includes a C code generator that provides compatible C source code that can be incorporated into customer developed software For users without an available microcontroller the software also includes an assembly code generator that produces code targeted for the ultralow cost PIC12F629 microcontroller SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM C EVALB SC OR HSC ADC EVALB DC SINGL HIGH SPEED ADC EVALUATION BOARD FILTERED ANALOG INPUT CLOCK INPUT 05949 001 120 PIN CONNECTOR Figure 1 For more information on using this device to control SPI devices see the AN 812 Microcontroller Based Serial Port Interface SPI Boot Circuit application note PRODUCT HIGHLIGHTS 1 Graphic Interface Intuitive user interface for manipulation of all on chip registers 2 Simple Hardware Interface Easy interfacing with ADC data capture boards and a compatible USB interface 3 Built In Code Generator Aut
28. s option allows selection of the device chip select various program flow control options error handling see Figure 9 and alternative interfacing options In general these selections do not need to be changed because they are set during the configuration process for the device However the ability to change selections can be useful for advanced users SPI Controller Cfg Dialog FIFO Chip Select Number 8 v OK PROGRAM CONTROL Enable Auto Update of DLL Cfg Cal files Update Controller From DUT on New DUT Enable Auto Channel Update V Perform NewDUT function during NewCal Ignore Transfer function during write Read Channel Index ADCO ERROR MESSAGES USB error msg en Transfer error msg en PARALLEL PORT Enable parallel port interface Cs SCIk SDI SDO Idle Otherport 0378 hex Settling Delay in ticks 0 1uSec 80 Printer Port LPT 1 LPT2 C LPT3 05949 008 Figure 9 SPI Controller Cfg Dialog Box FIFO Chip Select Number USB FIFO Channel Number The FIFO Chip Select Number menu allows you to configure the SPI Controller to activate the chip select line of the desired converter Although most evaluation boards use Chip Select Number 1 this option allows you to select another Chip Select Number as needed By default the appropriate value is selected when the program is run and do not need to be changed Program Control Program Control allows a number of optional
29. t information for the device Register and bit information is available with this software package from www analog com or by using the FTP download feature see the Download Files from FTP Site section If the installation CD does not provide a configuration for the converter contact highspeed converters analog com 05949 011 Device Cal Filename This file contains the default values for each on chip register The initial file provided with the software contains default chip values New Cal files can be created that allow you to set different defaults Script Filename The C code generator writes to this file Because it is generated with the same data that is sent to the USB SPI Controller it is representative of the same information used to program the device from the evaluation board This code includes embedded documentation to enhance readability Although the code is fully usable it is not optimized Various programming techniques exist to improve the optimization of the code for both speed and size This code is provided as a starting point to ensure that you have reference code that is helpful for device configuration Script Log Filename The instructions are logged to this file When this feature is enabled all instructions that pass to the device are also written to this file creating a log of all commands written to the device This is an appended file containing the program history of the device until the file is cle
30. the device has multiple ADCs features local to each ADC channel are shown on the ADC A through ADC Z tabs For a single ADC only the ADCBase 0 tab is available Not all converters support all features and therefore the specific device data sheet should be consulted to determine what individual features are available and how the part will respond to the values programmed Auxiliary ADC functions are found on additional pages accessible by selecting tabs which are labeled accordingly If more than one page is required multiple pages are included These are device specific functions and documentation can be found in the specific device data sheet Some converters have additional pages not documented here Again consult the specific device data sheet for information regarding those features In general functionality of those features is consistent with features documented here Chip Run C Full Pwr Dn Standby Chip Reset CLOCK 3 Duty Cycle Stabilizer 3 6 2007 1 05 23 PM OUTPUT MODE 14 Level Option ANSI C IEEE Data Format Offset Binary C Fs Complement OUTPUT ADJ 15 OutputDriverTermination None vw Ohms OUTPUT PHASE 16 lo v Degrees TEST IO D Reset Pn Long Gen Reset Pn Short Gen USER PATT 1 LSB 19 SERIALCONTROL 21 he Serial Seg LSB 1st USER PATT 1 MSB 1A foe re USER PATT 2LSB 1B fe te USER PATT 2 MSB 1C fe e Re
31. v A Page 6 of 20 PLL Lo Enc 1OMSPS Bitstream Size Normal bit stream x 05949 005 Figure 6 Typical User Interface Appearance May Vary by Device FILE MENU The File menu allows for loading and saving of various configuration files as shown in Figure 7 File Config Help Cfg Open Cfg Save As Cal Open Cal Save As Download Files From FIP Site 05949 006 Exit Figure 7 File Menu CFG OPEN The SPI Controller works with most AD92xx AD94xx and AD66xx data converters that support an SPI port see the device data sheet for details To configure the controller for the applicable device select Cfg Open and choose the configuration file for that device Configuration files are supplied with this software or the evaluation boards and are also available at www analog com Web updates are also available as documented in the Download Files from FTP Site section of this application note If required configuration files cannot be located by any of these means they can be request by contacting highspeed converters analog com CFG SAVE AS If a configuration file has changed it can be saved under a new name for future use by selecting this option The program prompts for a new filename AN 878 CAL OPEN Cal Open allows the user to retrieve setup information The option to retrieve previously saved registers settings can expedite setting a device in a desired state CAL SAVE AS When the registers of a
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