Specifications

ManualsBrandsMATLAB ManualsOtherXPC TARGET 4 - DEVICE DRIVERS

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Model execution driven by CAN-messages (Interrupt capability of CAN Receive blocks)

4-51

Generate interrupts check box. Checking this box will declare all

CAN-messages defined in this Receive block instance through their

identifiers as messages, which will fire an interrupt. Or in other words it is

not possible to define a single CAN message within the set of defined

identifiers to be the only one to fire an interrupt. In most cases only the

reception of one specific message is used to drive the application execution.

Therefore use at least two instances of the Receive block. One to receive the

CAN message, which drives the execution (Generate Interrupts checked)

and the other for all other “normal” CAN-messages to be received (Generate

Interrupts unchecked).

CAN-AC2-PCI

The CAN-AC2 is a PCI-board, and the hardware interrupt line is automatically

assigned by the PCI BIOS during the boot-up of the target system. Use the xPC

Target function ‘getxpcpci’ (see ‘help getxpcpci’) at the MATLAB command

prompt to query the target system for installed PCI devices and the assigned

resources. Write down the interrupt line number assigned to the

CAN-AC2-PCI board.

1 In the Simulink window, and from the Tools menu, point to Real-Time

Workshop

, and then click Options. Select the category “xPC Target code

generations options” in the displayed dialog box. In the “Real-Time

Interrupt Source” popup menu select the interrupt line number which you

have retrieved by calling ‘getxpcpci’. Close the dialog box and save the

model.

2 Open the dialog box of the CAN Receive block in the model which defines the

CAN-message (identifier) to be used to fire the interrupt. Check the