Getting Started with the LabVIEW Embedded Module for ARM
Contents
1. e Rename the round LED to threshold exceeded Tip Double click to select a single word in a label Triple click to select the entire label National Instruments Corporation 15 Embedded Module for ARM Microcontrollers input output Ao 0 threshold threshold exceeded Do o Figure 2 Changing the Labels Creating the Block Diagram The block diagram is the source code for a VI and contains a pictorial description or representation of an application Wires carry data between the objects or nodes on the block diagram The controls and indicators you added in the Creating the Front Panel section appear as terminals on the block diagram Complete the following steps to create the block diagram as shown in Figure 3 This block diagram multiplies an input value by 2 and then lights an LED if the product is greater than the threshold value you specify 1 Switch to the block diagram by clicking the block diagram if it is visible or selecting Window Show Block Diagram Y Tip You also can switch to the block diagram by pressing the lt Ctrl E gt keys 2 Select Help Show Context Help to display the Context Help window The Context Help window displays basic information about LabVIEW objects when you move the cursor over each object Tip You also can press the lt Ctrl H gt keys to open and close the Context Help window 3 Place a While Loop located on the Structures palette around the controls and indicator2. 3 Note The Luminary Micro drivers create a virtual serial port over the USB connection If you unplug the evaluation board and then plug the evaluation board into another USB port on the host the Luminary Micro drivers create additional virtual COM ports Refer to the Stellaris LM3S8962 Evaluation Board User s Manual available on the Luminary Micro Software and Documentation CD included with the Stellaris LM3S8962 Evaluation Kit for more information about the LM3S8962 evaluation board National Instruments Corporation 7 Embedded Module for ARM Microcontrollers What s New The Embedded Module for ARM Microcontrollers includes the following new features New Preset Build Specification Configurations The Build Specification Properties dialog box now includes preset build configurations such as optimizing code generation for application speed or size When you use one of the preset configurations LabVIEW sets the appropriate build options automatically You can override individual options in a preset configuration To use a preset build configuration select a configuration from the Run Time Options pull down menu on the Application Information page of the Build Specification Properties dialog box Improved Build Specification Conflict Notification The Build Specification Properties dialog box now includes a Build settings conflicts area at the bottom of each page If you select build settings that are incompatible
3. 4 Click the Run button Save the VI if prompted Click the Yes button when LabVIEW prompts you to rebuild the embedded application Enter different values in the input numeric control until the threshold exceeded indicator lights on the front panel When the threshold exceeded indicator lights on the host computer LEDO on the ARM target also lights Click the Abort Execution button to stop the ARM application Where to Go from Here National Instruments provides many resources to help you succeed with your NI products Use the following related documentation as you continue exploring LabVIEW and the Embedded Module for ARM Microcontrollers National Instruments Corporation LabVIEW Help available by selecting Help Search the LabVIEW Help in LabVIEW provides information about LabVIEW programming step by step instructions for using LabVIEW and reference information about LabVIEW VIs functions palettes menus and tools Refer to the Embedded Module for ARM Microcontrollers book on the Contents tab of the LabVIEW Help for information specific to the Embedded Module for ARM Microcontrollers and the applications you create The LabVIEW Help uses ARM in the index to indicate topics specific to the Embedded Module for ARM Microprocessors The LabVIEW Help uses Embedded Targets in the index to indicate topics that are relevant to all embedded targets Context help provides brief descriptions of VIs functions and dial
4. e To Byte Integer e To Double Precision Float e To Extended Precision Float e To Fixed Point e To Long Integer e To Quad Integer e To Single Precision Float e To Unsigned Byte Integer e To Unsigned Long Integer e To Unsigned Quad Integer e To Unsigned Word Integer e To Word Integer Data Manipulation Functions The following Data Manipulation functions support the fixed point data type e Flatten To String e Logical Shift e Rotate Left With Carry e Rotate Right With Carry e Type Cast e Unflatten From String String Number Conversion Functions The following String Number Conversion functions support the fixed point data type e Decimal String To Number e Fract Exp String To Number e Hexadecimal String To Number e Number To Decimal String e Number To Engineering String e Number To Exponential String e Number To Fractional String National Instruments Corporation 11 Embedded Module for ARM Microcontrollers e Number To Hexadecimal String e Number To Octal String e Octal String To Number New Target Support In addition to the Keil MCB2300 and the Luminary Micro EK LM3S8962 boards the Embedded Module for ARM Microprocessors now also supports the Keil MCB2400 board which contains an NXP LPC2468 microcontroller Refer to the Keil Web site at www keil com for more information about or to purchase the MCB2400 board New Vis and Functions New CAN VIs The Embedded Module for ARM Microcontrollers n
5. menu Enter 100 to wait 100 milliseconds between loop iterations 14 Save the VI The block diagram should look similar to Figure 3 output threshold exceeded Wait Until Next ms Multiple Figure 3 Creating the Block Diagram Verifying the Build Specification Use build specifications to specify how the LabVIEW C Code Generator generates C code and how to build the ARM VI into an application You can have multiple build specifications for the same target For example you might want one build specification that generates debugging information and another build specification that does not generate this extra information By default ARM build specifications enable debugging National Instruments Corporation 17 Embedded Module for ARM Microcontrollers 3 Complete the following steps to verify the settings in the build specification you created with the ARM Project Wizard 1 Right click the build specification in the Project Explorer window and select Properties from the shortcut menu to display the Build Specification Properties dialog box Tip You also can double click the build specification to open the Build Specification Properties dialog box 2 Verify that the Enable debugging checkbox contains a checkmark and the current debugging mode is JTAG Tip The current debugging mode is shown under the Enable debugging checkbox You select the debugging mode on the Advanced Debugging Options page 3 Verify the
6. Support for GPIO and PWM 0 eee ee eeeeteeeeeees 13 Tutorial for the Embedded Module for ARM Microcontrollers 13 Creating the LabVIEW Project ieee ceesseeseceeeseceeeeseenseeaeenes 14 Reviewing the Project Explorer Window escesseeseeeeseeeseeeeeeees 14 Creating the Front Panel 3 04 niacin ek E E ited oes 15 Creating the Block Diagram eee ee ceceeecseeeeeeseeeseeeeeseeaeenes 16 Verifying the Build Specification eee eeseeseeeseenseeeeeseenes 17 Building and Running the ARM Application eee 18 Debugging with Breakpoints and Probes eee eeeeseeeeeteeneeees 20 Using Elemental W O uini tenancies eatin ea 21 Adding Elemental I O Items to the Project eee 22 Using Elemental I O on the Block Diagram s 22 Building and Running the Application with Elemental I O 23 Where t Go from Heres i ii 2 sk nies tesa ep ende neues deeper i 23 System Requirements The Embedded Module for ARM Microcontrollers has the following requirements A computer with Windows Vista XP 2000 RealView Microcontroller Development Kit including Keil uVision3 LabVIEW 8 6 with embedded support Keil ULINK2 USB JTAG adaptor Refer to the LabVIEW Release Notes available by selecting Start All Programs National Instruments LabVIEW LabVIEW Manuals and opening LV_Release_Notes pdf for information about LabVIEW development system requirements Embedded Module for ARM Microcontrollers 2 ni co
7. execution location is Run on target using ULINK2 to run the application on the evaluation board 4 Select the Source Files category and verify that the VI is in the Top level VI text box When you use the ARM Project Wizard to create a project LabVIEW automatically uses the VI the wizard creates as the top level VI When you create a project without using the wizard you must manually select the top level VI by clicking the blue right arrow button shown at left to move a VI from the source files list gt to the Top level VI text box If the ARM project contains other files such as c and 1ib files add these files to the Additional files list 5 Click the OK button to close the dialog box 6 Select File Save All in the Project Explorer window or VI Building and Running the ARM Application After you develop the ARM VI on the host computer you build the VI into an application that runs on an ARM target When you build an ARM application the LabVIEW C Code Generator generates C code from the LabVIEW block diagram using the settings you configure in the Build Specification Properties dialog box Note You must activate the Keil uVision License ID Code LIC before you can build an ARM application with LabVIEW If the LIC is not activated you receive a warning when you try to build the application Refer to the Activating the Keil uVision License ID Code Readme available by selecting Start All Programs National Instruments Lab VI
8. on the block diagram While Loops repeat the inner subdiagram until the conditional terminal which is an input terminal receives a particular Boolean value Right click the conditional terminal shown at left in the lower right corner of the While Loop and select Create Constant from the shortcut menu The default Boolean constant in the While Loop is FALSE 4 Place a Multiply function located on the Numeric palette on the block diagram inside the While Loop 5 Wire the input control to the x input of the Multiply function 6 Right click the y input of the Multiply function and select Create Constant from the shortcut menu Enter 2 to multiply the value of the input control by two Embedded Module for ARM Microcontrollers 16 ni com 7 Place a Greater function located on the Comparison palette on the block diagram 8 Wire the x y output of the Multiply function to the x input of the Greater function 9 Wire the threshold control to the y input of the Greater function 10 Wire the x gt y output of the Greater function to the threshold exceeded indicator 11 Wire the output indicator to the wire connecting the Multiply function and the Greater function 12 Place a Wait Until Next ms Multiple function located on the Time Dialog amp Error palette inside the While Loop 13 Right click the millisecond multiple input of the Wait Until Next ms Multiple function and select Create Constant from the shortcut
9. the project at the same time Lab VIEW indicates a conflict on the PWM2 item in the Project Explorer window After you add Elemental I O items to the project LabVIEW filters the available resources in the New Elemental I O dialog box to remove resources with pin conflicts If you right click the target and select New Elemental I O from the shortcut menu again notice that PWM1 is no longer available in the Available Resources list because you already added LEDO to the project Using Elemental 1 0 on the Block Diagram You can use Elemental I O on the block diagram after you add Elemental I O items to the project Complete the following steps to use Elemental I O on the block diagram 1 Drag LEDO from the Project Explorer window to the block diagram above the threshold exceeded indicator and inside of the While Loop 2 Wire the x gt y output of the Greater function to the LEDO item in the Elemental I O Node Refer to the Using Elemental I O Nodes topic in the LabVIEW Help for more information about using Elemental I O Nodes Embedded Module for ARM Microcontrollers 22 ni com Building and Running the Application with Elemental 1 0 3 Note Before you run the application verify that LabVIEW is downloading to the target and not to the simulator In the Build Specification Properties dialog box verify Run on target using ULINK2 is selected Complete the following steps to run the ARM application with Elemental T O 1 2
10. EW Readme and opening readme_ARM_uVision_Licensing htm1 for information about activating the LIC Refer to the Evaluating the Embedded Module for ARM Microcontrollers section for more information about evaluation mode Embedded Module for ARM Microcontrollers 18 ni com Complete the following steps to build download and run an ARM application 1 Click the Run button shown at left in the VI or right click the build specification in the Project Explorer window and select Run from the shortcut menu to build download and run the application on the ARM target using the settings in the Build Specification dialog box LabVIEW displays the status of the building process which includes compiling and linking In addition the Processor Status window assists in monitoring the download connection and execution progress of the application Because the build specification for this application enables debugging the application runs on the target with front panel updates on the host computer 3 Note Click the OK button if a dialog box appears notifying you about an updated uVision template 2 Enter a value in the threshold numeric control on the host computer 3 Enter different values in the input numeric control In Figure 4 the output value on the left does not exceed the threshold value If you change the input value so that the output value is greater than the threshold value the threshold exceeded LED lights input output i
11. Getting Started with the LabVIEW Embedded Module for ARM Microcontrollers 1 1 For the Luminary Micro EK LM3 8962 The LabVIEW Embedded Module for ARM Microcontrollers is a comprehensive graphical development environment for embedded design Jointly developed by Keil An ARM Company and National Instruments this module seamlessly integrates the LabVIEW graphical development environment and ARM microcontrollers You can lower development costs and achieve faster development times by using the Embedded Module for ARM Microcontrollers to program ARM targets This module builds on NI LabVIEW Embedded technology which facilitates dataflow graphical programming for embedded systems and includes hundreds of analysis and signal processing functions integrated I O and an interactive debugging interface With the Embedded Module for ARM Microcontrollers you can optimize linking and view live front panel updates using JTAG serial or TCP IP The Embedded Module for ARM Microcontrollers includes the LabVIEW C Code Generator which generates C code from the LabVIEW block diagram This manual includes system requirements installation instructions new features and a step by step tutorial that shows you how to build run and debug an ARM application Contents System Requirements eee sseseeescesseessesecessesecesseseeeseeseesseeseesseeneees 2 Installing the Embedded Module for ARM Microcontrollers 3 Evaluating the Embedded
12. Module for ARM Microcontrollers 5 Installing the LM3S8962 Evaluation Board 0 eee eeeeeeseeeeereeeeeeaes 5 What S INGW ios Se siseiaieseegciaisiiigas Sead aceite Quine gs I imate 8 New Preset Build Specification Configurations 0 0 0 0 8 Improved Build Specification Conflict Notification 0 00 0 8 New VI Specific Code Generation Options 00 0 0 eee eeeeeeeees 8 New Project Level Code Generation Options cece ee eeeeees 9 lt 7 NATIONAL p INSTRUMENTS Shared Variable Support eee cc ceeeseeseeeseceeeesecseeeseeseenseeeenaes 9 Fixed Point SUpport s uve seredel ein eeeeun o eee a A 10 Supported Numeric Functions eessseeseeeeeseseeresrerrsreereresrreeses 10 Comparison Functions cee enie 10 Conversion Functions ce ea aa e E E i S 11 Data Manipulation Functions sessssessseersereresrsresresesresrsreererene 11 String Number Conversion Functions eseeseeseseeeeeereresereenes 11 New Target SUpport iere miernie iii ii oE REEN 12 New VIs and Functions iesin a e E 12 New CAN VE A estes rE E EEEE RES 12 New Memory Access VIS escesceessseeseceeeeeeseeeeeeeeaeecsaeeeaeee 12 New Console Output VIo eee ee eeeeceeseeeeeeeceeeeseeseeeaeeneees 12 In Place Element Structure Support 0 0 eee eee eseeeteeeeeee 13 Synchronization Functions Suppott ees eeseeeeeneeeeeeeees 13 SPI and FC VIs Support c ccccscssssesesessssesesessssesesesesseseseeeesenees 13 Expanded
13. d LabVIEW are trademarks of National Instruments Corporation Refer to the Terms of Use section on ni com 1legal for more information about National Instruments trademarks Other product and company names mentioned herein are trademarks or trade names of their respective companies For patents covering National Instruments products technology refer to the appropriate location Help Patents in your software the patents txt file on your media or the National Instruments Patent Notice at ni com patents 2008 National Instruments Corporation All rights reserved 374931B 01 Sep08
14. during the driver installation Click the Continue Anyway button to continue with the installation 7 Follow the activation instructions that appear on the screen Skip this step if you are evaluating the Embedded Module for ARM Microcontrollers Refer to the Evaluating the Embedded Module for ARM Microcontrollers section for more information about running in evaluation mode You also can use the NI License Manager available by selecting Start All Programs National Instruments NI License Manager to activate National Instruments products Refer to the National Instruments License Manager Help available by selecting Help Contents in the NI License Manager for more information about activating NI products 8 Restart the computer when the installer prompts you and log in as an administrator or as a user with administrator privileges Embedded Module for ARM Microcontrollers 4 ni com Evaluating the Embedded Module for ARM Microcontrollers You can install and evaluate the Embedded Module for ARM Microcontrollers for 60 days When you run the Embedded Module for ARM Microcontrollers in evaluation mode LabVIEW includes the following limitations 3 Note Ifyou are evaluating the Embedded Module for ARM Microcontrollers with an already licensed and activated LabVIEW development system these limitations apply only to ARM targets VIs and applications e A 60 day time limit until the evaluation version expires While not activat
15. e application reaches the breakpoint during execution the ARM target halts all operation the application pauses and the Pause button on the host computer shown at left appears red and changes to a Continue button Add probes on the wires coming into the Multiply function to see the values a Click the wire coming into the x input b Click the wire coming into the y input As shown in Figure 5 a floating Probe window appears after you create each probe LabVIEW numbers the Probe windows automatically and displays the same number in a glyph on the wire you click Embedded Module for ARM Microcontrollers 20 ni com Wait Until Next ms Multiple Figure 5 Creating Probes 5 Enter a different value in the input numeric control and click the Continue button shown at left to see the value in the first Probe an window change as the ARM application executes additional iterations of the While Loop Repeat entering a different value in the input numeric control and clicking the Continue button a few times 6 Click the Step Over button shown at left to execute the Multiply function and pause at the Greater function which blinks when it is ready to execute 7 Continue clicking the Step Over button to step through the rest of the block diagram 8 Click the Abort Execution button to stop the application 9 Right click the Multiply function and select Breakpoint Clear Breakpoint from the shortcut menu to remove
16. ed LabVIEW prompts you to activate the product each time you launch LabVIEW You also receive a warning when you build a VI into an application until you activate the Keil uVision License ID Code LIC After the evaluation period for LabVIEW expires you are no longer able to launch LabVIEW until you purchase and activate the Embedded Module for ARM Microcontrollers e A 128 KB size limit Any applications you create and build with LabVIEW and Keil Vision are limited to 128 KB e An evaluation version watermark during the 60 day time limit All user VIs and controls contain an evaluation watermark Installing the LM3S8962 Evaluation Board You need the following items to use the LM3S8962 evaluation board with JTAG emulation e LM3S8962 evaluation board e An IBM compatible PC with two unused USB ports one to supply power to the board and the other to perform ULINK2 USB JTAG downloading and debugging e ULINK2 USB JTAG adaptor included e Two USB serial cables each no longer than 10 feet included Refer to the hardware documentation for required accessories such as cables and adaptors UN Caution Be careful when removing the board from the package and handling the board to avoid the discharge of static electricity which might damage some components National Instruments Corporation 5 Embedded Module for ARM Microcontrollers Figure 1 shows the location of some of the parts on the LM3S8962 evaluation board Refer to t
17. efer to the Verifying the Build Specification section for more information about the Build Specification Properties dialog box Creating the Front Panel The front panel window usually contains the user interface for a VI ARM applications do not include a user interface but you can use the front panel window as a debugging interface In this tutorial you create a VI with an LED indicator that lights on the front panel if the input exceeds a threshold value you define Complete the following steps to create the front panel debugging interface 1 Add the following controls to the front panel window e Two numeric controls located on the Numeric palette e One numeric indicator located on the Numeric palette e One round LED located on the Boolean palette Y Tip If you cannot find the object you want click the Search button on the Controls palette for front panel objects or the Functions palette for block diagram objects Type the name of the object for which you want to search LabVIEW searches as you type and displays any matches in the search results text box You also can press the lt Ctrl Space gt keys or select View Quick Drop to display the Quick Drop dialog box Type the name of the object you want to add to the front panel or block diagram windows 2 Rename the controls as shown in Figure 2 e Rename one of the numeric controls to input e Rename the other numeric control to threshold e Rename the numeric indicator to output
18. he hardware documentation for more information about the evaluation board QO OO O o i C y 000000000000000 P Q 000000000000000 o0 P y oo D ool Y oo D O0O00000000 OO00000000 C m aca E 000000000000000 000000000000000 o Oo I 1 JTAG connector 4 Speaker 6 Power LED 2 USB connector 5 Organic LED display 7 Ethernet connector 3 Reset button Figure 1 Locating Parts on the LM3S8962 Evaluation Board Complete the following steps to install the board You do not have to open the computer case to install the board 1 Verify that you have Keil uVision3 installed Vision is a part of the Real View Microcontroller Development Kit You can look for the Keil uv3 directory on the hard disk or select Start All Programs and locate the shortcut to Keil uVision3 Do not launch pVision3 from the shortcut if you are going to use LabVIEW Refer to the Installing the Embedded Module for ARM Microcontrollers section for information about installing the RealView Microcontroller Development Kit 2 Connect the ULINK2 USB JTAG adaptor to a USB port on the host computer If this is the first time connecting the ULINK2 USB JTAG adaptor to the computer the connection activates the Windows Found New Hardware icon in Windows A Windows message not
19. ifies you when the new device is ready for use and the hardware installation is complete Embedded Module for ARM Microcontrollers 6 ni com 3 Connect the ULINK2 USB JTAG adaptor to the JTAG connector on the board 4 Connect the USB connector on the board to a USB port on the host computer This USB connection provides power to the board The power LED illuminates on the board 3 Note The board remembers the last program that ran because you must program the flash memory on the board to run an application Therefore the board begins running the last application as soon as the board receives power You must download a new application to change the start up behavior of the board 5 Install the three drivers for the LM3S8962 evaluation board when the Found New Hardware Wizard prompts you a Inthe Found New Hardware Wizard welcome page select No not this time so that Windows does not connect to Windows Update to search for the software b Click the Next button c Select Install the software automatically Recommended If you did not install the Luminary Micro drivers during the software installation you must insert the installation DVD before the wizard begins to scan the hard drive d Click the Next button e Click the Continue Anyway button when the Hardware Installation alert window opens f Click the Finish button when Windows finishes installing the driver g Repeat steps a through f to install the other two drivers
20. ished shared variables Embedded targets support single process shared variables and network published shared variables Embedded targets do not support hosting shared variables Use the Embedded Variable Connection Manager available by selecting Tools ARM Module Embedded Variable Connection Manager to start a TCP IP connection service between a host computer and embedded target for reading and writing shared variables National Instruments Corporation 9 Embedded Module for ARM Microcontrollers Fixed Point Support The fixed point data type has limited support ay Note Overflow mode is supported but overflow status is not supported Supported Numeric Functions The following Numeric functions support the fixed point data type e Absolute Value e Add e Decrement e Increment e Multiply e Negate e Round To Nearest e Round Toward Infinity e Round Toward Infinity e Scale By Power Of 2 Function e Sign e Subtract e Square Comparison Functions The following Comparison functions support the fixed point data type e Equal e Equal To 0 e Greater Or Equal e Greater Or Equal To 0 e Greater e Greater Than 0 e Less Or Equal e Less Or Equal To 0 e Less e Less Than 0 e Not Equal e Not Equal To 0 Embedded Module for ARM Microcontrollers 10 ni com Conversion Functions The following Conversion functions support the fixed point data type e Boolean Array To Number e Number To Boolean Array
21. lorer Window The Project Explorer window includes two pages the Items page and the Files page The Items page displays the project items as they exist in the project tree The Files page displays the project items that have a corresponding file on disk Project operations on the Files page both reflect and update the contents on disk You can switch from one page to the other by clicking the Items and Files tabs or by right clicking a folder or item under a target and selecting Show in Items View or Show in Files View from the shortcut menu Expand the ARM target in the Project Explorer window The VI you created with the ARM Project Wizard appears under the ARM target Embedded Module for ARM Microcontrollers 14 ni com LabVIEW automatically adds Dependencies and Build Specifications under the target SubVIs appear under Dependencies when you add a VI that contains subVIs to a project Build specifications you create appear under Build Specifications To see the build specification you created with the ARM Project Wizard expand the Build Specifications item under the ARM target in the Project Explorer window Application is the default build specification name You can rename the build specification by right clicking Application and selecting Rename from the shortcut menu or by double clicking the build specification which opens the Build Specification Properties dialog box and entering a new name in the Build specification name text box R
22. m Installing the Embedded Module for ARM Microcontrollers The Embedded Module for ARM Microcontrollers installer includes LabVIEW 8 6 with embedded support If you have LabVIEW 8 6 already installed you can install LabVIEW with embedded support without first uninstalling LabVIEW 8 6 However you must install the Real View Microcontroller Development Kit before you install the Embedded Module for ARM Microcontrollers Complete the following steps to install the Real View Microcontroller Development Kit and the Embedded Module for ARM Microcontrollers 1 Log in as an administrator or as a user with administrator privileges 2 Insert the LabVIEW Embedded Module for ARM Microcontrollers installation DVD and select to install the Real View Microcontroller Development Kit Tip If the installer does not automatically begin double click MDK_LV exe on the DVD to begin installation of the RealView Microcontroller Development Kit 3 Follow the instructions on the screen for installing the Real View Microcontroller Development Kit 4 Activate the Keil uVision License ID Code LIC Complete the following steps to activate the LIC Skip this step if you are evaluating the Embedded Module for ARM Microcontrollers Refer to the Evaluating the Embedded Module for ARM Microcontrollers section for more information about running in evaluation mode a National Instruments Corporation Launch Keil Vision by selecting Start All Pr
23. nput output 2 14 4 fa threshold threshold exceeded threshold threshold exceeded i ae Figure 4 LED Lights when Output Exceeds Threshold 3 Tip LabVIEW uses default values for controls and indicators when building an ARM VI into an ARM application To change the initial values enter the new values in the front panel controls and then select Edit Make Current Values Default to change the initial values You must rebuild the ARM application if you change the initial values for any of the controls 4 Click the Abort Execution button shown at left to stop the ARM application National Instruments Corporation 19 Embedded Module for ARM Microcontrollers Debugging with Breakpoints and Probes Complete the following steps to debug the ARM tutorial application with breakpoints and probes 1 2 Switch to the block diagram if it is not visible Right click the Multiply function and select Breakpoint Set Breakpoint from the shortcut menu The breakpoint is highlighted with a red border around the function This breakpoint specifies to pause execution just before the function executes Click the Run button or right click the build specification in the Project Explorer window and select Debug or Run from the shortcut menu Save the VI if prompted LabVIEW also prompts you if you need to rebuild or redownload the ARM application to the ARM target The ARM tutorial application begins running on the ARM target When th
24. og boxes Context help for most VIs and functions include a link to the complete reference for a VI or function Select Help Show Context Help to display the Context Help window Examples available from the NI Example Finder and in the Labview examples 1vemb ARM directory can help you get started creating applications 23 Embedded Module for ARM Microcontrollers e The readme file available by selecting Start All Programs National Instruments LabVIEW Readme and opening readme_ARM htm1 contains known issues and last minute information e Getting Started with LabVIEW manual available by selecting Start All Programs National Instruments Lab VIEW LabVIEW Manuals and opening Lv_Getting_Started pdf provides information about the LabVIEW graphical programming environment and the basic LabVIEW features you use to build data acquisition and instrument control applications e Stellaris LM3S8962 Evaluation Board User s Manual available on the Luminary Micro Software and Documentation CD included with the Stellaris LM3S8962 Evaluation Kit provides detailed information about the various parts on the LM3S8962 evaluation board e Ifyou are considering moving to custom hardware the LM3S8962 Microcontroller Data Sheet available on the Luminary Micro Software and Documentation CD included with the Stellaris LM3S8962 Evaluation Kit provides reference information for the LM3S8962 microcontroller National Instruments NI ni com an
25. ograms Keil uVision3 Select File License Management to display the License Management dialog box Click the Help button to open the ARM Development Tools help file Follow the instructions for obtaining a single user license You need an internet connection and a product serial number PSN to activate the license The PSN is an alphanumeric value located on the Certificate of Ownership or license card included with purchased products After you add the LIC to the License Management dialog box click the Close button to close the dialog box Exit Keil uVision before installing the Embedded Module for ARM Microcontrollers 3 Embedded Module for ARM Microcontrollers Refer to the Keil Web site at www keil com license for more information about activating Keil uVision 5 Ifthe installer welcome screen is still visible select to install the Embedded Module for ARM Microcontrollers If the installer welcome screen is not visible double click setup exe on the DVD to begin installation of the Embedded Module for ARM Microcontrollers 6 Follow the instructions on the screen for installing the Embedded Module for ARM Microcontrollers The installation DVD installs both LabVIEW with embedded support and the Embedded Module for ARM Microcontrollers Luminary Micro EK LM3S8962 You must select the Custom installation option and choose to install the Luminary Micro Driver for EK LM3S8962 A software installation alert might appear
26. or arrays clusters strings variants and waveforms with build options on the Application Information page in the Build Specification Properties dialog box Using stack variables overrides constant allocation If you place a checkmark in the Use stack variables checkbox Allocate constants is always First use and Deallocate constants is always Out of scope First use and Out of scope was the default behavior in previous versions e Allocate constants Specifies when LabVIEW allocates memory for constants First use Allocates memory the first time you use constants on the block diagram Containing loop Allocates memory outside of the loop that contains constants VI initialization Allocates memory when the VI that contains the constants is called Application initialization Allocates memory when the built application begins running on the target e Deallocate constants Specifies when LabVIEW frees memory resources for constants Out of scope Frees memory resources when the constants are no longer used VIend Frees memory resources when a VI containing constants finishes executing Application end Frees memory resources when the built application finishes executing on the target Shared Variable Support You can use single process and network published shared variables to share data among VIs in the same embedded application or to read data from and write data to other network publ
27. ow includes a CAN palette which includes the following VIs e ARM CAN Open e ARM CAN Start e ARM CAN Set Receive ID e ARM CAN Read e ARM CAN Write Use these VIs to communicate with a controller area network CAN New Memory Access VIs The Embedded Module for ARM Microcontrollers now includes a Memory Access palette which includes the following VIs e CCG Mem Peek 8 e CCG Mem Peek 16 e CCG Mem Peek 32 e CCG Mem Poke 8 e CCG Mem Poke 16 e CCG Mem Poke 32 Use these VIs to read and write values to specific memory addresses New Console Output VI The Embedded Module for ARM Microcontrollers now includes a CCG Console Output VI for printf functionality Use this VI to print text to the standard output stream stdout of the operating system on the target The ARM Console Output VI in version 1 0 has been deprecated Embedded Module for ARM Microcontrollers 12 ni com In Place Element Structure Support The Embedded Module for ARM Microcontrollers now supports the In Place Element structure which controls how the LabVIEW compiler performs certain operations and in some cases increases memory and VI efficiency Synchronization Functions Support The Embedded Module for ARM Microcontrollers supports the following new Synchronization functions e Lossy Enqueue Element e Wait on Notification from Multiple with Notifier History e Wait on Notification with Notifier History SPI and I2C Vis Support The EK LM3S8962
28. roj to group together LabVIEW files and non LabVIEW files create build specifications for building a VI into an ARM application and run the application on the target You must use a project to build an ARM VI into an ARM application Complete the following steps to create a project with an ARM target and a blank VI 1 Launch LabVIEW In the Getting Started window select ARM Project from the Targets pull down menu Click the Go button to launch the ARM Project Wizard 2 Select New ARM project blank VI in the Project type pull down menu to create the LabVIEW project with a blank VI G Tip The New ARM project existing VI imports an existing VI rather than creating a z new blank VI 3 Click the Next button to display the Select ARM target type page 4 Select the target from the Target type pull down menu 5 Click the Next button to display the System preview page 6 Verify the Create a build specification checkbox contains a checkmark Build specifications contain the build settings and code generation options to use when you build a VI into an application 7 Click the Finish button Because the Create a build specification checkbox contains a checkmark the ARM Project Wizard creates a build specification with default settings LabVIEW prompts you to save the project and VI before the ARM Project Wizard can create the build specification The project now appears in the Project Explorer window Reviewing the Project Exp
29. such as parallel execution and expression folding you receive notification in the Build settings conflicts area New VI Specific Code Generation Options You now can optimize subVI calls and inline subVIs into callers which can eliminate overhead and increase code optimization e Optimize subVI calls Generates C code for subVI calls with as little default data initialization as possible You cannot debug a VI with optimized subVI calls e Allow inlining Allows inlining of subVIs into callers Inlining subVIs is most useful for small subVIs VIs with many calls in a loop or subVIs with only one call site The default is True This option only allows inlining To actually inline a subVI you must select True from the Inline subVI pull down menu on the Source File Settings page in the Build Specification Properties dialog box To set code generation options for a VI select File VI Properties from the front panel window or block diagram window to open the VI Properties dialog box Select C Code Generation Options from the Category pull down menu You can select From project True or False Select True to enable the option and False to disable it The default is From project so you only need to set the options in the VI Properties dialog box if you want to override the code generation settings in the project Embedded Module for ARM Microcontrollers 8 ni com New Project Level Code Generation Options You now can allocate constants f
30. target now supports the SPI and IC VIs on the ARM palette Expanded Support for GPIO and PWM The EK LM3S8962 target now contains expanded support for PWM and GPIO You now can use Elemental I O Property Nodes to configure GPIO inputs and outputs You can read and write GPIO values to all pins of a port simultaneously in addition to reading and writing values to individual pins You can use the Manage Interrupts page of the Build Specification Properties dialog box to process GPIO triggered interrupts You also can use Elemental I O Property Nodes to configure PWM outputs This version of the Embedded Module for ARM Microcontrollers includes expanded PWM support for advanced PWM features such as alignment synchronization deadband control output and fault control Tutorial for the Embedded Module for ARM Microcontrollers Use this tutorial to learn how to build run and debug an ARM application In this tutorial you create a VI that you build into an application and run on the ARM target You use the front panel on the host computer as a debugging interface between the host computer and the target An LED indicator on the front panel lights when an input exceeds a threshold you define Then you add Elemental I O to the VI that lights an LED on the target when the input exceeds the threshold National Instruments Corporation 13 Embedded Module for ARM Microcontrollers Creating the LabVIEW Project Use LabVIEW projects 1lvp
31. the breakpoint Using Elemental 1 0 Elemental I O resources are fixed elements of ARM targets that you use to transfer data among the different parts of the target Each Elemental I O resource has a specific type such as digital analog or PWM For example you can use digital Elemental I O resources to manipulate an LED on the ARM target Refer to the LabVIEW Help for more information about using Elemental I O with ARM targets The following sections describe how to use Elemental I O to light an LED on the ARM target when the threshold is exceeded National Instruments Corporation 21 Embedded Module for ARM Microcontrollers Adding Elemental 1 0 Items to the Project You must add Elemental I O items to the project before you can use Elemental I O in an ARM VI Complete the following steps to add Elemental I O items to the project 1 Right click EK LM3S8962 in the Project Explorer window and select New Elemental I O from the shortcut menu to display the New Elemental I O dialog box Expand Digital Output in the Available Resources list Select LEDO Click the Add button to add LEDO to the New Elemental I O list Click the OK button to add the Elemental I O item to the LabVIEW project Ge Be ee nS Many pins on ARM targets can have multiple configurations For example LEDO and PWM1 both use the same pin on the EK LM3S8962 board Therefore you cannot use both LEDO and PWM1 in the same application If you add LEDO and PWM to
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