Spectrum Brands MI.61XX manual Starting without interrupt classic mode, Command register

Page 46

ProgrammingStandard generation modes

Starting without interrupt (classic mode)

Command register

Register

Value

Direction

Description

SPC_COMMAND

0

r/w

Command register of the board.

 

SPC_START

10

Starts the board with the current register settings.

 

 

 

 

 

SPC_STOP

20

Stops the board manually.

In this mode the board is started by writing the SPC_START value to the command register. All settings like for example the size of memory and postcounter, the number of activated channels and the trigger settings must have been programmed before. If the start command has been given, the setup data is transferred to the board and the board will start.

If your board has relays to switch between different settings a programmed time will be waited to prevent having the influences of the relays settling time in the signal. For additional information please first see the chapter about the relay settling time. You can stop the board at any time with the command SPC_STOP. This command will stop immediately.

Once the board has been started, it is running totally independent from the host system. Your program has full CPU time to do any calculations or display. The status register shown in the table below shows the current status of the board. The most simple programming loop is simply waiting for the status SPC_READY. This status shows that the board has stopped automatically.

The read only status register can be read out at any time, but it is mostly used for polling on the board’s status after the board has been started. However polling the status will need CPU time.

Status register

Register

Value

Direction

Description

SPC_STATUS

10

r

Status register, of the board.

 

SPC_RUN

0

Indicates that the board has been started and is waiting for a triggerevent.

 

SPC_TRIGGER

10

Indicates that the board is running and a triggerevent has been detected.

 

 

 

 

 

SPC_READY

20

Indicates, that the board has stopped.

The following shortened excerpt of a sample program gives you an example of how to start the board in classic mode and how to poll for the SPC_READY flag. It is assumed that all board setup has been done before.

// -----

start the

board

-----SPC_COMMAND,

SPC_START);

 

nErr = SpcSetParam

(hDrv,

 

// Here you can check for

driver errors

as mentioned in

the relating chapter

// -----

Wait for Status Ready (polling

for SPC_READY in a loop) -----

do

 

 

 

 

 

{

SpcGetParam (hDrv, SPC_STATUS, &lStatus);

}

while (lStatus != SPC_READY);

printf ("Board has stopped\n");

Starting with interrupt driven mode

In contrast to the classic mode, the interrupt mode has no need for polling for the board’s status. Starting your board in the interrupt driven mode does in the main not differ from the classic mode. But there has to be done some additional programming to prevent the program from hanging. The SPC_STARTANDWAIT command doesn’t return until the board has stopped. Big advantage of this mode is that it doesn’t waste any CPU time for polling. The driver is just waiting for an interrupt and the System has full CPU time for other jobs. To benefit from this mode it is necessary to set up a program with at least two different tasks: One for starting the board and to be blocked waiting for an interrupt. The other one to make any kind of calculations or display activities.

Command register

Register

Value

Direction

Description

SPC_COMMAND

0

r/w

Command register, of the board.

 

SPC_STARTANDWAIT

11

Starts the board with the current register settings in the interrupt driven mode.

 

SPC_STOP

20

Stops the board manually.

If the board is started in the interrupt mode the task calling the start function will not return until the board has finished. If no trigger event is found or the external clock is not present, this function will wait until the program is terminated from the taskmanager (Windows) or from another console (Linux).

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MI.61xx Manual

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Contents MI.61xx English version October 5Page Introduction Hardware InstallationSoftware Driver Installation SoftwareAnalog Outputs Fifo ModeProgramming the Board Standard generation modesSynchronization Option Option Gated ReplayOption Extra I/O AppendixGeneral Information IntroductionPreface PrefaceMI.6110 MI.6111 Different models of the MI.61xx seriesIntroduction Extra I/O Option -XMF Additional optionsExtra I/O Option -XIO Starhub Introduction Additional optionsSpectrum type plate Block diagram Technical Data Hardware informationHardware informationIntroduction Dynamic ParametersOrder information FilterInstalling the board in the system Hardware InstallationSystem Requirements Installing a board with digital inputs/outputs Installing a board with extra I/O Option -XMFHooking up the boards Installing multiple boards synchronized by starhubMounting the wired boards Only use the included flat ribbon cablesInstalling multiple synchronized boards Software Driver Installation Software Driver InstallationInterrupt Sharing Windows InstallationVersion control Driver Update Windows Software Driver Installation Windows Windows XP Windows XP Windows NT Adding boards to the Windows NT driverLinux OverviewDriver info Installing the deviceNow it is possible to access the board using this device Automatic load of the driverFirst Test with SBench SoftwareSoftware Overview SoftwareMicrosoft Visual C++ ++ Driver InterfaceHeader files Linux Gnu CDriver functions Other Windows C/C++ compilersNational Instruments LabWindows/CVI Include DriversFunction SpcSetData Windows Function SpcSetParamFunction SpcSetParam Function SpcGetDataSpectrum GmbH Include Driver Delphi Pascal Programming InterfaceType definition ExamplesDelphi Pascal Programming Interface Visual Basic Examples Visual Basic Programming InterfaceVBA for Excel Examples Visual Basic Programming Interface Overview Error handlingProgramming the Board Register tablesStarting the automatic initialization routine Example for error checkingInitialization PCI RegisterDate of production Installed memoryHardware version Serial numberUsed type of driver Installed features and optionsUsed interrupt line Driver versionSpcpcimemsize Powerdown and resetExample program for the board initialization SpcpciserialnoImportant note on channels selection Analog OutputsChannel Selection Disabling the outputsOutput offset Setting up the outputsOutput Amplifiers Register Value Direction Description Amplitude rangeMaximum Output Range Filter SpecificationsOutput Filters General description Standard generation modesProgramming Maximum posttrigger in MSamples Standard generation modes ProgrammingMaximum memsize Minimum and stepsize of memsize and posttrigger in samplesCommand register Starting without interrupt classic modeStarting with interrupt driven mode ProgrammingStandard generation modesValue ’start’ as a 32 bit integer value Data organizationWriting data with SpcSetData Value ’len’ as a 32 bit integer valueBit Standard Mode Standard modeSample format Background Fifo Write Fifo ModeGeneral Information Speed LimitationsTheoretical maximum sample rate PCI Bus Throughput Programming Fifo ModeSoftware Buffers 60040 Read out the number of available Fifo buffersAnalog acquisition or generation boards Fifo Mode ProgrammingBuffer processing Digital I/O 701x or 702x or pattern generator boardsSpcfifostart Example Fifo generation mode== Maxbuf SpcfifowaitProgramming Internally generated sample rate Clock generationStandard internal sample rate External reference clock Using plain quartz with no PLLExternal clocking Minimum external sample rate Direct external clockMaximum external samplerate in MS/s Example External clock with dividerCHANNEL0 CHANNEL1 CHANNEL2 CHANNEL3 Software trigger Example for setting up the software triggerTrigger modes and appendant registers External TTL triggerTrigger modes and appendant registers Example on how to set up the board for positive TTL triggerEdge triggers Positive TTL triggerPositive and negative TTL trigger Output modes Standard ModeOption Multiple Replay Trigger modesResulting start delays Trigger modes Option Multiple ReplayOption Gated Replay General information and trigger delayOption Gated Replay Value Direction DescriptionExternal TTL edge trigger Example programAllowed trigger modes Spctriggermode TmttlposChannel direction Option Extra I/ODigital I/Os Transfer DataProgramming example Analog OutputsAnalog Outputs Option Extra I/O Synchronization with option cascading Synchronization OptionDifferent synchronization options Synchronization with option starhubExample of board setup for three boards Setup order for the different synchronization optionsSet up the board parameters Write Data to on-board memory output boards only3a Define synchronization or trigger Define the boards for trigger masterExample of board #2 set as trigger master Define the remaining boards as trigger slavesDefine the remaining boards as clock slaves Define the board for clock masterExample board number 0 is clock master Arm the boards for synchronizationRead data from the on-board memory acquisition boards only Start all of the trigger master boardsWait for the end of the measurement Example for data readingSpcsyncmasterfifo Allocate the Fifo software buffers2a Write first data for output boards SpcsyncslavefifoAs trigger slaves Calculating the clock dividers Additions for synchronizing different boardsGeneral information 20xx 30xx 31xx 40xx 45xx 60xx 61xx 70xx 72xx40 MS/s Setting up the clock dividerBoard type 3122 3120 Board type 3025 3131Delay in Fifo mode Resulting delays using different boards or speedsDelay in standard non Fifo modes Additions for equal boards with different sample ratesAppendix Error CodesError name Value hex Value dec Error description AppendixExtra I/O with external connectorOption -XMF Pin assignment of the multipin connectorPin assignment of the multipin cable D14 D12 D10 Pin assignment of the internal multipin connectorExtra I/O with internal connector Option -XIO D15 D13 D11
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