The CardRequestIRQ function registers an interrupt service callback function for the specified socket and function pair.
STATUS CardRequestIRQ( CARD_CLIENT_HANDLE hCardClient CARD_SOCKET_HANDLE hSocket CARD_ISR ISRFunction UINT32 uISRContextData );
Note Only I/O drivers can request interrupt notifications. Interrupts will not be signaled until the PC Card is configured for the I/O interface by a call to CardRequestConfiguration.
If the function succeeds, the return value is CERR_SUCCESS; otherwise, it is one of the following:
Value | Description |
---|---|
CERR_BAD_ARGS | Indicates the pointer specified for ISRFunction is invalid. |
CERR_BAD_HANDLE | Indicates the driver handle specified for hCardClient is invalid. |
CERR_BAD_SOCKET | Indicates the socket identifier specified for hSocket is invalid or the PC Card not inserted. |
CERR_IN_USE | Indicates the configuration or interrupt is owned by another driver. |
CERR_OUT_OF_RESOURCE | Indicates a memory window is not available to access configuration registers. |
This function sets up the interrupt callback exclusively for the requesting driver. The device determines the interrupt source, determines which function on a socket interrupted, and calls the appropriate interrupt service callback function.
CardReleaseConfiguration, CardReleaseIRQ