MATLAB XPC TARGET 4 - DEVICE DRIVERS Guide de l'utilisateur télécharger pdf (Page 60)

5 Interrupt Support

that board with either two or four ID values, depending on the specific

hardware. W hen calling the hook functions, the xPC Target kernel obtains

thePCIinformationfortheboardandpassesittothehookfunctions.Use

these parameters to help identify the interrupting board.

- For VendorId and DeviceId, enter the IDs you get from the board

manufacturer.

- Many boards do not have SubVendorId and S ubDe viceId values. In

these cas es, insert the value

-1 to prevent The xPC Targ et software

from checking for them.

If you have an ISA board, it does not ha ve a vendor or de vice ID; i n stead,

the generated code will insert the ISA base a ddress in the first base address

entry of the PCI structure. To indicate to the kernel that this is an ISA

board, set

VendorId to -1 and DeviceI d to 1.

If you do n ot need hook functions:

- Set VendorId to -1 and DeviceId to -1.

- Set Fnc and PostHookFcn to 'NULL'.

- Set StartFunction and StopFunction to 'NULL'.

The Async IRQ S ource block will sti ll call the subsystem when an interrupt

occurs.

The following table summarizes your options for this element:

Vend orId DeviceId

Usage

+ID +ID

PCI board

-1 +1

ISA board

-1 -1

Special case: If the driver does no t need hook

functions. The driver can still use the Async IRQ

Source block. As an example, see the source code

for the serial communication driver.

• Enter the names of the interrupt functions. See “Hook Function Prototypes

— Alphabetical List” on page 5-15 for the prototype details.

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MATLAB XPC TARGET 4 - DEVICE DRIVERS Guide de l'utilisateur Page 60