HARPB CAN Node Emulator Using the Vector CANTech

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

HARP-B Outline • • HARP-B Hardware Architecture Purpose CANalyzer Host Emulation » HARP Micro » LABView GUI • LO Microcontroller Emulation • Benefits HARP Software Demo July 23 - 25 2001

HARP-B Hardware Architecture HARP-B HARP Software Demo July 23 - 25 2001

HARP-B 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? HARP Software Demo July 23 - 25 2001

HARP-B CANalyzer HARP Software Demo July 23 - 25 2001 • 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. . .

HARP-B with CANalyzer HARP Software Demo July 23 - 25 2001

HARP-B CANalyzer Features • • HARP Software Demo July 23 - 25 2001 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. . .

HARP-B CANalyzer Features HOST CAN Bus HARP Micro LO Micro Controller OR LABView GUI CANalyzer • • HARP Software Demo July 23 - 25 2001 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-B Program Development HARP Software Demo July 23 - 25 2001 • 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. . .

HARP-B Applications HARP Software Demo July 23 - 25 2001 • 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.

HARP-B HARP Software Demo July 23 - 25 2001 System Overview LO Microcontroller CANalyzer CAN Bus HOST HARP Micro OR LABView GUI

HARP-B HOST Emulation HARP Software Demo July 23 - 25 2001 • 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.

HARP-B LO Microcontroller Emulation HARP Software Demo July 23 - 25 2001 • 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 RTR’s and all other CAN Messages from the HARP Micro. • This is a key feature, especially when we won’t have the LO Microcontroller.

HARP-B HARP Software Demo July 23 - 25 2001 Emulation Topology HOST MICRO OR LABView GUI CANalyzer LO Controller Emulation CAN Bus LO Microcontroller CANalyzer HOST Emulation

Procedure for CAN Node Emulation HARP-B HARP Software Demo July 23 - 25 2001 • 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 d. B. • Scale the Signals appropriately. • That’s it!

HARP-B Benefits HARP Software Demo July 23 - 25 2001 • 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.

HARP-B Questions? • Now its Demo Time. . . HARP Software Demo July 23 - 25 2001