MATLAB XPC TARGET 4 - DEVICE DRIVERS Guide de l'utilisateur télécharger pdf (Page 61)

Adding Interrupt Support

- PreHookFunction

Prototype:

int __cdecl your_company_name_ boardPreHook(xpcPCIDevice *pciI nfo);

- PostHookFunction

Prototype:

void __cdecl your_compan y_name_boardPostHook(xpcPCIDevice *pciInfo);

- StartFunction

Prototype:

void __cdecl your_compan y_name_boardStart(xpcPCIDevice *pciInfo);

- StopFunction

Prototype:

void __cdecl your_compan y_name_boardStop(xpcPCIDevice *pciInfo);

If any of these four functions does not need to exist, set the corresponding

board structure entry to 'NULL' to prevent calls to that function in that

context.

Note The differences between hook functions fo r PCI and ISA devices are:

- PCI devices — A hook function for a PCI dev ice has all fields of the

xpcPCIDevice structure filled in except the VirtAddress field. To get

the virtual address for a physical mem ory, in the

Start function, call

the

xpcReserveMemoryRegion function and save the resulting virtual

address in the

VirtAddress field of the x pcP CIDevice structure. A

pointer to the same instance of this structure is p as sed to all four

functions. This action makes data, such as virtual addresses, available

to all functions.

- ISA devices — A hook function for an ISA device has the base I/O

address ente red i n the f irst ph ysical address. No other fields in the

xpcPCIDevice structure are filled in.

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MATLAB XPC TARGET 4 - DEVICE DRIVERS Guide de l'utilisateur Page 61