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HARP-B HARP Software Demo July 23 - 25 2001 CAN Node Emulator Using the Vector CAN-Tech CANalyzer Raj Atwal CAN Node Emulator.

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Presentation on theme: "HARP-B HARP Software Demo July 23 - 25 2001 CAN Node Emulator Using the Vector CAN-Tech CANalyzer Raj Atwal CAN Node Emulator."— Presentation transcript:

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2 HARP-B HARP Software Demo July CAN Node Emulator Using the Vector CAN-Tech CANalyzer Raj Atwal CAN Node Emulator

3 HARP-B HARP Software Demo July Outline HARP-B Hardware Architecture Purpose CANalyzer Host Emulation »HARP Micro »LABView GUI LO Microcontroller Emulation Benefits

4 HARP-B HARP Software Demo July HARP-B Hardware Architecture

5 HARP-B HARP Software Demo July Purpose We need to Test Efficiently & Effectively. We need to Limit User Intervention while testing. We need to Monitor CAN Bus Traffic. We need to Test Continuously. How have we achieved this?

6 HARP-B HARP Software Demo July CANalyzer Troubleshooting Tool for CAN bus systems. Assists in Observing, Analyzing, and Simulating Data Traffic. Works… »With the raw data bytes within the CAN Message. »At the Application Level, with the actual physical values(ie scaled values). And above all, integrates easily with existing hardware architectures...

7 HARP-B HARP Software Demo July HARP-B with CANalyzer CANalyzer

8 HARP-B HARP Software Demo July CANalyzer Features Displays data segments of specific CAN messages. Transmits predefined CAN messages. Replays recorded CAN messages. Evaluates and Acquires statistics on bus loading and bus disturbances. Allows use of Symbolic names for CAN Messages and Signals. Expansion of functionality via user programming. Allows Tracing - a real-time listing of bus data traffic...

9 HARP-B HARP Software Demo July CANalyzer Features CAN Sniffer Sits on the CAN Bus. Picks up ALL CAN Messages. Useful for Observing and Analyzing. Nice way of keeping track or monitoring data traffic. Helps in testing. HARP Micro LABView GUI LO Micro Controller CANalyzer CAN Bus OR HOST

10 HARP-B HARP Software Demo July Program Development The CAN Access Programming Language - CAPL, is used. CAPL is application oriented, and very similar to the C Programming Language. Program blocks can be inserted at any point in the data flow diagram. CAPL is based on a Special Event Procedure concept. This concept is a simpler version of Interrupts and Interrupt Service Routines. Use of CAPL results in numerous potential applications...

11 HARP-B HARP Software Demo July Applications Data Traffic Simulation. CAN Node Emulation. »HOST Emulation. HARP Micro. LABView GUI. »LO Microcontroller Emulation. Test CAN Bus Communications between CAN Nodes. Perform Event Specific actions. Link Between two buses.

12 HARP-B HARP Software Demo July System Overview LO MicrocontrollerCANalyzer HARP Micro LABView GUI CAN Bus OR HOST

13 HARP-B HARP Software Demo July HOST Emulation Pretend to be the Host. »HARP Micro. »LABView GUI. Simulate CAN Messages. Transmit CAN Messages continuously with random data values. Observation of LO Microcontroller behavior. Analyze results, especially any discrepancies. Specifically, we can… »Change Bias Voltages. »Change the YIG Frequency. »Turn Asynch Alarm, Idle, and Debug Modes on and off. »Respond to user requests entered via the keyboard.

14 HARP-B HARP Software Demo July LO Microcontroller Emulation We can add CAPL program blocks that make CANalyzer behave exactly like the LO Microcontroller (or any other CAN Node). When the LO Microcontroller (or any other CAN Node) is absent, testing with the HARP Micro can continue. CANalyzer responds to RTRs and all other CAN Messages from the HARP Micro. This is a key feature, especially when we wont have the LO Microcontroller.

15 HARP-B HARP Software Demo July Emulation Topology HOST MICRO OR LABView GUI CANalyzer LO Controller Emulation LO MicrocontrollerCANalyzer HOST Emulation CAN Bus

16 HARP-B HARP Software Demo July Procedure for CAN Node Emulation All participating nodes must be connected to the CAN Bus. All CAN Messages must be set up in the CANalyzer CAN Data Base. All CAN Message Signals must be declared within the CAN dB. Scale the Signals appropriately. Thats it!

17 HARP-B HARP Software Demo July Benefits In the ABSENCE of actual hardware devices, we can use CANalyzer to emulate those devices. CAN Node Emulation allows »Reduction in delay time for testing. »Helpful in testing other CAN Nodes. »Testing can continue in the absence of any CAN Node. »Thorough and Efficient testing. »System response to a variety of CAN Messages. »Continuous overnight test runs. »Verification.

18 HARP-B HARP Software Demo July Questions? Now its Demo Time...


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