5.2 The User Interrupt Function Interface

These are the lines from DSCUD.H that provide the interface to user interrupt functions. For complete details see the function descriptions and the datatype descriptions.

// User Interrupt Modes

#define USER_INT_CANCEL 0
#define USER_INT_AFTER 1
#define USER_INT_INSTEAD 2

// User Interrupt Sources

#define USER_INT_SOURCE_INTERNAL 0
#define USER_INT_SOURCE_EXTERNAL 1

// Type Definitions

typedef void (*DSCUserInterruptFunction) (void* parameter);

// Structures
// The following structure is used by all type of user interrupts

typedef struct
{
DSCUserInterruptFunction func;
BYTE int_mode;
} DSCUSERINTFUNCTION;

// The following structure is used only by the solo type user interrupts

typedef struct
{
BYTE intsource;
FLOAT rate;
BYTE clksource;
BYTE counter;
DWORD int_type;
DSCUserInterruptFunction func;
BOOL Enable;
BOOL Mode;
BOOL BitSelect;
BOOL Edge;
}

// Function Prototypes

BYTE DSCUDAPICALL dscSetUserInterruptFunction(DSCB board, DSCUSERINTFUNCTION * dscuserintfunction);

BYTE DSCUDAPICALL dscClearUserInterruptFunction(DSCB board);

BYTE DSCUDAPICALL dscUserInt(DSCB board, DSCUSERINT* dscuserint, DSCUserInterruptFunction func);