WBK30
Contents
1. in the FIFO This allows manually stopping the current acquisition without losing data that is acquired but not yet transferred to the host computer daqTest can perform self tests on the hardware e DtstFifoAddrDataBusValid Performs a bus address test on the WBK30 e DtstFifoMemCellvalid Performs a memory test on the WBK30 Transfer pacing can prevent the mouse from freezing during a Pre Trigger Mode data transfer and help eliminate the Buffer Overrun error To help manage data transfer from the WaveBook an application can p n 1025 0901 rev 2 0 per EO 2116R3 WBK30 User s Guide 3 pace the transfer by setting a transfer limit on the scan count After the count reaches this value the driver stops transferring data The transfer operation remains open and can resume when the application sends a larger limit to the driver The pacing count is set by calling daqgAdcTransferGetStat with the scan count argument initialized to point to the pacing count and the active flag initialized to point to a value that is Boolean TRUE The pacing count can be called repeatedly during an acquisition to allow the driver to write more data By continually updating the pacing count as data is removed from the transfer buffer the client can pace the data transfer When not in Pacing Mode daqgAdcTransferSetBuf fer behaves normally the driver ignores argument values To get normal behavior while in Pacing Mode initialize the active flag to point to a Bo2. or its port is too slow With the WBK30 all the desired data is kept in the WBK30 buffer until the acquisition is complete Then the PC at its own speed reads the entire correct acquisition Thus the collection of pre trigger data can continue indefinitely even at the highest acquisition rate Of course the WBK30 must have the capacity to hold all pre trigger and post trigger data p n 1025 0901 rev 2 0 per EO 2116R3 WBK30 User s Guide 1 Hardware Setup CAUTION Turn power off to all connected devices before performing the setup To avoid pin damage make sure the memory card is aligned correctly with the mating connector J101 Gently press them together Perform the setup in a static free work area using tools wrist strap containers and procedures that are ESD safe One or more components are sensitive to damage from Note The figure shows a WaveBook 512 the 516 is similar Not all components are shown electrostatic discharge Foam Pad Remove 3 jumpers x from J101 BS 262 0303 chip must be stamped MEM A If not an upgrade is required Card guide on inside of WaveBook 516 front panel WBK30 Connection to a WaveBook Install the WBK30 into a WaveBook as follows 1 2 3 Turn off all system power and unplug the power adapter from the WaveBook Remove the WaveBook s top cover plate Verify compatibility The WBK30 is compatible with all WaveBook 516s and upgraded Wav
3. WBK30 User s Guide WaveBook Memory Option Reference Note The WaveBook User s Manual has additional information on buffer operation data packing A WaveView custom programming and related issues 8 MB 8 MB 8 MB 8 MB DRAM DRAM DRAM DRAM 8 MB 8 MB 8 MB 8 MB Memory DRAM DRAM DRAM DRAM Controller 8 MB 8MB 8 MB 8 MB DRAM DRAM DRAM DRAM Acquired data gt lt _ Data to PC Doaccooscccceoo00e 0 00000060000000000 P1 8 MB 8 MB 8 MB 8 MB connects to J101 in WaveBook DRAM DRAM pA AEA WBK30 Block Diagram The WBK30 is a DRAM based memory board that installs inside a WaveBook The WBK30 increases the capacity of the WaveBook s standard data buffer from 64 thousand samples to 8 64 million samples increased by a factor of x125 to x1000 The WBK30 is available with 3 capacities e WBK30 16 16 7 MB to hold 8 3 million samples 11 1 million packed e WBK30 64 67 1 MB to hold 33 5 million samples 44 7 million packed e WBK30 128 134 2 MB to hold 67 1 million samples 89 4 million packed Benefits of using the larger and enhanced data buffer include e Compensates for a PC s slow connection slow disk drive or limited memory e Prevents data loss when an acquisition is stopped deliberately or due to buffer overflow The user can stop disarm an acquisition at any time On disarm data in the WBK30 is preserved and transferred to the PC e Reduces the PC
4. e current acquisition These arguments can also send information to DaqX when using a Pacing Mode transfer e DaafAcgArmed TRUE means the device is armed data is either being sampled and sent to the buffer at the present time or will be when the trigger occurs Data transfer may or may not be active e DaafDataPresent TRUE means there is some data in the buffer The device may or may not be armed data transfer may or may not be active daqGetInfo can query WaveBook configuration options e DdiExtFeatures Returns a mask of feature bits including features of the WBK30 DhefFifoOverflowMode Buffer has Overflow Protection mode DhefFifoCycleMode Buffer has Cycle Pre Trigger Mode DhefFifoScanCount Buffer has readable current data count e DdiFifoScanCount Returns the count of scans currently in the WBK30 The DhefFifoScanCount bit of the DaiExtFeatures value will be set for supported hardware daqSetOption can set WaveBook configuration options e DbotFifoOverflowMode Enables the WBK30 s overflow protection e DbotFifoCycleMode Enables the WBK30 s Pre Trigger Mode e DbotFifoCycleSize Sets the size of the WBK30 s circular buffer when in Pre Trigger Mode The size is specified as the number of 16 bit words in the buffer e DbotFifoFlush Tells the driver to immediately flush all data in the FIFO This option is enabled for WaveBooks with or without a WBK30 e DbotFifoNoFlushOnDisarm Disables flushing of data
5. eBook 512s To determine 512 compatibility locate p n 262 0303 the FPGA IC on the WaveBook s motherboard see figure The 262 0303 chip must be stamped MEM A for the WBK30 to work properly By serial number the following WaveBook 512s are not compatible 148010 and below 148253 149322 150411 150413 150415 150418 151597 153335 Ifnot compatible contact the factory about an upgrade After a WaveBook 512 is modified for the WBK30 it must have a WBK30 to work to return to operation without the WBK30 would require another factory modification Remove all 3 jumpers from the WaveBook s 40 pin connector J101 Align the WBK30 so its P1 connector is directly over J101 In a WaveBook 516 before pressing the connectors together slip the opposite end of the WBK30 into the plastic card guide above the D sub connector on the front panel Gently press the connectors together be careful to avoid pin damage Verify the setting is secure in the 512 the foam pad helps brace the WBK30 against the top cover plate Replace top cover plate and power up the system 2 WBK30 User s Guide p n 1025 0901 rev 2 0 per EO 2116R3 Software Setup Reference Note Chapter 5 of the WaveBook User s Manual explains WaveView in greater detail Chapters 14 and 15 explain programming with the enhanced API WaveView The WBK30 is supported by WaveView version 7 2 and higher Check boxes in the System Options menu allow you to enable or disab
6. le the Pre Trigger and or Overflow Protection modes Both modes will be enabled by default when WaveView first detects the presence of the WBK30 e Enable WBK30 Pre Trigger Mode causes WaveView to use the Pre Trigger Mode for high speed pre trigger acquisitions Acquisitions unable to use the Pre Trigger Mode will run normally whether this setting is enabled or not When using the WBK30 pre trigger mode the actual number of pre trigger scans acquired may be up to 3 scans less than the pre trigger scan count programmed in the acquisition configuration dialog e Enable Overflow Protection Mode causes WaveView to use the Overflow Protection for all acquisitions Data is preserved if you cancel a transfer by selecting the STOP button in either the Scope or Direct to Disk window Disable this mode if data from a stopped acquisition is unwanted DaqX Programming of the WBK30 Only the enhanced API DaqX versions 2 4 and higher supports the WBK30 The standard API with wbk commands cannot address the WBK30 Commands affecting the WBK30 include dagAdcTransferSetBuffer sets information to initialize a data transfer One argument is a bit mask of transfer mode codes e DatmPacingMode Setting this bit in the transferMask argument enables Pacing Mode In this mode the caller paces the acquisition by proving a pacing count via daqAdcTransferGetStat daqAdcTransferGetStat returns a count of scans transferred and a bit mask of status bits for th
7. olean FALSE In all modes the arguments always return scan count and status information regardless of the active flag Pacing Mode is enabled via dagAdcTransferSetBuf fer by setting the DatmPacingMode bit of the transferMask argument WBK30 Specifications Name Function WaveBook Memory Option expands internal data FIFO from 64 Ksamples to 8 64 Msamples Memory Capacity M 1 000 000 Part Number WBK30 16_ WBK30 64_ WBK30 128 Bytes 16 7M 67 1M 134 2 M Samples 8 3 M 33 5 M 67 1 M Packed Samples 11 1 M 44 7 M 89 4 M Maximum Acquisition Length Pre Trigger Acquisitions Same as memory capacity Post Trigger Acquisitions Depends on PC transfer rate acquisition rate both in samples per second and capacity as follows Maximum Acquisition Length T x acquisition rate Where T Time to overflow Capacity acquisition rate transfer rate Example Acquiring 500 K unpacked samples per second with a WBK30 16 and a PC capable of transferring 200 Ksamples second overflow will occur in T 8 3M 500K 200K 27 6 seconds Thus Acquisition Length 27 6 seconds x 500K 13 8 million samples Pre Trigger Mode Allows indefinite pre trigger duration regardless of PC resources and transfer rate Environmental 0 C to 70 C compatible with WaveBook internal environment User Installation Requires main board modification for Wavebook 512 shipped before July 1998 Plug in compatible with Waveb
8. ook 512 units shipped after July 1998 and all Wavebook 516s Mechanical Mounting Friction fit with 40 pin header Fit with foam rubber spacers in Wavebook 512 card guide in Wavebook 516 Power 300 mA maximum 200 mA typical at 5 V Dimensions 2 6 x 4 1 inches 4 WBK30 User s Guide p n 1025 0901 rev 2 0 per EO 2116R3
9. s CPU load during the pre trigger acquisition by performing internal buffer management Note Without the WBK30 acquired data flows as fast as possible from the WaveBook to the PC With a WBK30 the transfer can be delayed until the scan is complete In some cases this may delay the real time view available in WaveView Features The WBK30 adds 2 important features to WaveBook operation e Overflow Protection Mode allows the PC to correctly retrieve all data collected before the overflow Even with the WBK30 s large memory it can still overflow during a fast acquisition with a slow PC In such cases overflow protection can preserve millions of potentially valuable samples In an overflow condition without this protection all data in the buffer would be lost e Pre Trigger Mode allows local buffering of pre trigger acquisitions The WBK30 manages finite length acquisitions entirely within its own buffer instead of using the PC s resources During the acquisition the WaveBook begins acquiring data in advance of the trigger When the trigger occurs a specified amount of the most recent pre trigger data is preserved The post trigger data is then collected as specified Together pretrigger data and post trigger data comprise the entire acquisition Without a WBK30 all pre trigger data including any to be discarded must be transferred into the PC s memory followed by the post trigger data This data transfer may be impossible if the PC
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