DT9841. Scalable Realtime Data Acquisition USB Function Module with Embedded DSP

Transcription

1 Compatible Windows Software TI Code Composer Scalable Realtime Data Acquisition USB Function Module with Embedded DSP Key Features USB 2.0 BUS: USB Type: USB/DSP Function Module 5 VOLTS Software programmable embedded DSP and Control Functions. Standalone function allows module to run separately from PC. Onboard DSP bypasses all Windows latencies. 64 MB of onboard RAM, optionally expandable to 128 MB. Full data acquisition capability: A/D, D/A, DIO, C/T, Triggers. 8 simultaneous channels of 24-bit sigma-delta A/D, 100kS/s, expandable to additional modules. 2 simultaneous channels of 24-bit sigma-delta D/A, 100kS/s expandable to additional modules. 24 lines of Digital I/O (8 in, 8 out and 8 programmable for I/O) plus 3 32-bit up/down Counter Timers). Expandable to additional modules. High-speed 50 MB/sec intermodule communication bus to provide expandability and scalability... allows stacking of up to 8 modules. Access DSP functions with TI Code Composer. USB 2.0 host to module (480 Mbps). 500 volts isolation prevents ground loops and protects your computer. All onboard functions can operate simultaneously. 2 MBytes of Flash Memory allows system autonomous operation. Realtime control with embedded TMS320C6711 DSP...standalone or system operation. ANALOG IN Fig. 1. The : state-of-the-art USB data acquisition and DSP in a single 6U compact module, with intermodule communication expandable up to eight modules. ANALOG OUT EXT TRIGGER EXT CLOCK -64/2 shown with EP346 faceplate option. Overview The is a USB/DSP Function Module with embedded processor for DSP and real-time control capability. The 6U module has standard connections for analog input, analog output, trigger and clock. The module runs completely separate from the PC to avoid Windows latencies. Once your program is loaded on the module, it does not need host intervention and can run on its own. With 2 Mbytes flash memory the module can run automatically. The can continue to run, monitor and control data if the host PC becomes disconnected accidentally, ensuring the security of missioncritical applications. High-Performance Data Acquisition and DSP The s efficient hardware architecture lets you perform analog input, analog output and signal processing simultaneously. The memory is shared by the analog I/O and onboard processor (and intermodule communications). Each subsystem on the board has its own high-speed pathway in and out of memory, and each pathway has its own independent DMA controller. This allows A/D and D/A subsystems to operate without processor intervention. 19 6U Fig. 2. Scalable-real-time DSP based data acquisition system. Connect up to 8 boards via LVDs communication port to expand channel count up to 64 simultaneous A/D input signals plus 16 D/A output signals.

2 Power In USB 2.0 Interface 500 Volt Isolation LVDS Expansion JTAG Port TMS320C 6711 DSP SRAM FLASH RAM Analog In Analog Out DIO/3 32-bit up/down counter timers Power Out Ext. Trigger Ext. Clock Fig. 3. Close-up view of the shows component layout and subsystem access. Pictured, -64/2 board with 2 Mb Flash Ram option. Sigma-Delta A/D and D/A Data Converters Analog input and output circuits feature advanced sigma delta converters for improved ac performance. Sigma-delta A/D converters offer the following advantages: Simultaneous sampling by independent A/D converters on each input (equivalent to Simultaneous Sample and Hold) Reduced noise and improved accuracy result from 64x oversampling on each input Elimination of errors due to aliasing and high frequency noise using the built-in "brick wall" digital filtering system (external anti-aliasing filters are not needed) Excellent low-level signal-to-noise performance improves dynamic accuracy on low-level signals Excellent differential linearity assures consistently accurate data conversion across the full input range. Sigma-delta D/A converters provide automatic interpolation between data points for smoother output. Signal reconstruction is performed by an 8x digital interpolation filter followed by 64x oversampling. 2 Data Translation, Inc. US and Canada (800) , (508) UK Germany (07142) Internet

3 Fig. 4. The is a complete test system, isolated from host PC with embedded user programmable processor, scalable up to 64 channels and expandable up to 8 modules. Analog Inputs Built-In Channel Expansion Capabilities The has eight 24-bit differential inputs with an input signal range of +/- 10 volts. The resolution of 24 bits allows LSB recognition down to signal levels of +/- 5nV. All eight A/Ds are clocked at the same time for simultaneous sampling. External clock and triggers on the module allow you to add additional modules, in a master/slave configuration. Program the first module to provide the master clock and synch up additional modules to expand up to 64 simultaneously sampled channels. Analog Outputs The features two 24-bit delta sigma analog outputs, clocked with the A/D conversion clock. The module also features software selectable 20kHz filters on the D/A outputs. Digital I/O The features 24 digital I/O lines: 8 inputs, 8 outputs and 8 programmable as digital I/O or up to three counter timer functions. Counter Timer Functions Three 32-bit user counter/timers available with up/down capability for all your counter/timer applications. User Connections The has two 68-pin standard connectors for the Analog I/O, DIO and C/T. A single USB cable ships with each module. An AC to DC power supply is available separately. USB 2.0 Compatibility The module is both USB 2.0 and USB 1.1 compatible. USB 2.0 extends the speed of the connection from 12 Mbps on USB 1.1 up to 480 Mbps on USB 2.0, providing an attachment point for nextgeneration peripherals which complement higher performance PCs and user applications. USB 2.0 is both forward and backward compatible with USB 1.1, resulting in a seamless transition process for the end user. In fact, USB 2.0 uses the same cables and connectors as USB V Isolation Protects Your Data Because USB modules reside outside the computer, they are susceptible to groundspikes. These spikes can cause system crashes and may even cause permanent damage to your computer. The features 500 volts of galvanic isolation that protects your computer from groundspikes and ensures a reliable stream of data.

4 Fig. 5. Using standard development tools from Texas Instruments and Microsoft, Fulcrum II delivers high performance, high-level software components to build powerful real-time applications for your Fulcrum II Series hardware. A Complete DSP Programming Environment The can be used by developers, programmers and high-level applications software package users. A developer is able to use the with TI Code Composer under Windows 2000 or XP. Software Overview The host software for the provides a means of installing and configuring the from the host, tools for downloading and executing DSP programs, an API for writing host programs to communicate with running DSP programs, an API for building utilities, diagnostics, etc, and sample programs that use the two APIs. Host Communications Library The library provides the API for the so that you can write host-based programs for communicating with the. In addition, it allows other software components to easily be layered on top of it later. When you are writing your own DSP code for the with TI Code Composer, you may need to write a corresponding PC-based program that communicates with the. To do this, you need a host communication library that you can call from your host-based program. This library hides the details of the communication channel between the program and the DSP chip. In the case of the, the library hides the details of the USB interface and provides a stream-based model of communication in its place. This API meshes with the DSP BIOS model, which you may be using to write your DSP programs on the other side of the USB link. Application Programming Interface An Application Programming Interface (API) for Windows is provided with the and supports stream, message, and low level I/O to/from the board. The API is broken into four categories of functions - Board, Channel, Messaging and Hardware functions. The typical user program will rely on only the Board and Channel functions. The last two categories are typically very specialized user programs. Board Function - Provides facilities for opening, closing, resetting boards and downloading programs. These functions operate on an entire board rather than a subsystem within the board. Channel Functions - The channel functions are operations on a single communication channel between a program running on the host and a program running on the. At any given time, multiple channels can be open between the host and a. Each of these channels is a unidirectionalbuffered byte stream Messaging Functions - The messaging functions give access to the lower level host-to- messaging system. Hardware Functions - These functions provide the lowest level access to the hardware. Utility Programs The ships with two utility programs: Download Program A command line program that downloads a named COFF file to the DT These binary image files are the compiled output files from Code Composer. Diagnostic Program A command line program that will run a series of diagnostic tests on the board and verify its basic functionality. DSP Example Programs Provided with the are several simple example programs that illustrate how to program the board via the Code Composer cross development environment. These programs illustrate how to access a single major subsystem or feature of the board. Demo Program A demo program included with the shows the main features and highlights of the board. The program is a Code Composer project and a matching Visual Studio project. Control Panel Applet A Windows control panel applet is provided that allows you to set the following configuration items on the board: Enable/disable termination resisteors on analog inputs Switch shared input line configuration between digital input or counter inputs Assign a board name to each installed. 4 Data Translation, Inc. US and Canada (800) , (508) UK Germany (07142) Internet

5 Accessories There are many ways to configure the. The baseboard provides two 68-pin headers for all analog, digital, and counter functions. Standard cabling can be used to tie directly to the as seen in Fig 6. In addition, Data Translation offers two faceplate options to choose from. The EP346 faceplate connects to via 68-pin connectors as pictured in Fig. 6. The EP347 faceplate provides BNC connectors for analog input/output and, in addition, it features one 37-pin connector for digital I/O and two 25-pin connectors for analog I/O and counter timer functions. The external clock and trigger signals are available on the front panel via BNC connectors. Fig. 6. EP346 connects directly to via two 68-pin headers and attaches to the board. Fig. 7. EP347 connects directly to via two 68-pin headers and attaches to the board with screws. Fig. 8. EP346 faceplate assembly adds standard locking 68- pin connectors for analog I/O and digital I/O. Fig. 9. EP347 faceplate assembly adds provision for both BNC and locking D-Sub connectors for analog I/O and standard D-sub connectors for digital I/O subsystems. Fig. 10. shown assembled with EP346 faceplate accessory. EP346 faceplate provides two 68-pin connectors that tie directly to STP68 or STP268. The can now be installed in a 6U size card cage and locked into place with attached screws. Fig. 11. shown assembled with EP347 faceplate accessory. EP347 faceplate provides BNC and D-Sub connectors for all analog and digital input/outputs. The can now be installed in a 6U size card cage and locked into place with attached screws.

6 BUS: USB Type: USB/DSP Function Module 24 Lines DIO and 3 32-bit Counter Timers Fig. 12. is an intelligent data acquisition system optimized for the highest performance, real-time data acquistion and digital signal processing applications. A unique architecture that tightly couples delta-sigma A/D and D/A converters to a DSP engine allows simultaneous data collection and analysis, A/D, D/A, and host communications. Analog Inputs Resolution (bits) 24 Throughput 100kHz/channel 800kHz aggregate (8 channels) Inputs 8 differentials inputs; 8 separate delta sigma converters Gain 1 Range (V) Full scale range ±10V LSB Resolution 1.192uV Digital Anti-Aliasing Filters Passband (-3dB) 48kHz Stopband (-80dB) 56kHz Channel-to-Channel Aperture Match (ns) ±5 Channel-to_Channel Phase Match ( ) ±0.1 Group Delay 34/throughput System Error (% of FSR) ±0.02 max Signal/(Noise+Distortion) Ratio f in 1kHz in, 100kHz sampling Total Harmonic Distortion f in 1kHz in, 100kHz sampling Input Impedance 100 MΩ/100pF CMRR 60Hz) 80 min Maximum Input Voltage ±30V (±25/±15) ESD Protection CE Spec Protection Analog Outputs Range Total Recon- Error Drift DACs Resolution Throughput Harmonic struction (% of (ppm Group (bits) (khz) ±5mAmin) Distortion Filter FSR) of FSR/ C) Delay kHz/DAC ±10-94dB 20kHz ±0.02 ±50 340us low pass 34/conversion rate change w/recon- struction software filter enabled Power, Physical, and Environmental Specifications Power External, 5V, 4A DC, AC Power Supply Optional Physical Dimensions: 233mm x 280mm Weight: TBD Bus: USB 2.0 or 1.1 Certification and Compliance FCC Part 15 Class B verified; will not compromise FCC compliance of host computer CE Environmental Operating temperature range: 0 C to 55 C Storage temperature range: 25 C to 85 C Relative humidity: To 95%, noncondensing 6 Data Translation, Inc. US and Canada (800) , (508) UK Germany (07142) Internet

7 User Manuals Manuals are provided in electronic (PDF) format on the CD-ROM provided with the board. You can also purchase hard copies. Getting Started Manual Hardware User s Manual DSP Programmer s Reference Manual Describes the DSP device drivers that are provided for the function module. This information allows a programmer to create a code composer program that runs on the DSP of the module. Host Communications Library Reference Manual Describes the functions that are provided for communicating between the host computer and the function module. This information allows a programmer to create a Windows-based application program running on the host computer that communicates with an embedded DSP program running on the module. Technical Support As you develop your application, application engineers are available during normal business hours to discuss your requirements. Extensive information is available 24 hours a day on our web site at including drivers, example code, bug fixes, pinouts, a searchable KnowledgeBase, and much more. Support is also available from your point of purchase. Telephone support is free for the first 90 days; you can also request complimentary support via or fax at any time. Additional support options are available; contact your Data Translation representative for details. Industry Segments/Applications Industrial Automation Assembly and robotics Automatic test equipment Process controls Electronics manufacturing Modal analysis Telecom/Datacom Test equipment Military/Aerospace Avionics Data acquisition Simulators Command, control and communications Scientific Instrumentation Data acquisition Automotive Noise/Vibration measurement and analysis Fig. 13. Connect to the optional STP268 screw terminal panel via a standard 68-pin SCSI cable. BUS: USB Type: USB/DSP Function Module Ordering Summary All Data Translation hardware products are covered by a 1-year warranty. For pricing information, see a current price list, visit our web site or contact your local reseller. Each Module is shipped with a USB cable and drivers for Microsoft Windows 2000/XP, DSP Function library, host communication library, onboard drivers and a comprehensive user s manual in PDF form. Manuals are available in hard-copy form for an additional charge. USB function module with 8, 24-bit, 100Ks/S analog inputs, 2, 24-bit, 100Ks/S outputs and 24 digital inputs/outputs and counter/timer. 2 models with different memory configurations: MB SDRAM. -64/2 64 MB SDRAM plus 2 MB Flash. Accessories EP346 Faceplate with 2, 68-pin connections. EP347 BNC/face plate assembly with BNC & DSUB connectors. STP268 Screw terminal panel. EP m shielded 50-pin cable for connecting multiple boards. EP348-5V 6A optional power supply. User Manuals Getting Started Manual Hardware User s Manual DSP Programmer s Reference Describes the DSP device drivers that are provided for the function module. This information allows a programmer to create a Code Composer program that runs on the DSP of the module. Host Communications Library Reference Manual Describes the functions that are provided for communicating between the host computer and the function module. This information allows a programmer to create a Windows-based application program running on the host computer that communicates with an embedded DSP program running on the module.. Copyright 2002 Data Translation, Inc. All rights reserved. All trademarks are the property of their respective holders. Prices, availability, and specifications subject to change without notice.