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;
} DSCUSERINT;

// Function Prototypes

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

BYTE DSCUDAPICALL dscClearUserInterruptFunction(DSCB board);

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