C:\Windows\System32\AIO167.dll provides this API; it can alternately be moved to the same dir as the executable.
Headers are provided for C/C++ and Delphi (Object Pascal). C/C++ also requires a library file; one is provided for Microsoft Visual C/C++. Because the names match, it's possible to start with an ACCES32-based sample, and just remove VCACCES.lib and add VCAIO167.lib.
function GetNumCards: LongWord; cdecl; external 'AIO167.dll';
__declspec(dllimport) unsigned long GetNumCards(void);
GetNumCards() returns the number of cards installed using AIO167. The first card always has a card number of 0, the next (if any) is 1, etc. Thus if GetNumCards() returns 3, then the cards are numbered 0, 1, and 2.
function QueryCardID(CardNum: LongWord; pID: PLongWord): LongWord; cdecl; external 'AIO167.dll';
__declspec(dllimport) unsigned long QueryCardID(unsigned long CardNum, unsigned long *pDeviceID);
QueryCardID() fetches the virtual device ID of a card. The 104-AIO16E's virtual device ID is 0x1ECE8, and the 104-QUAD-8's is 0x12230. It returns a Windows error code, which will be ERROR_SUCCESS on success.
function QueryCardBase(CardNum: LongWord; pBase: PLongWord): LongWord; cdecl; external 'AIO167.dll';
__declspec(dllimport) unsigned long QueryCardBase(unsigned long CardNum, unsigned long *pBase);
QueryCardBase() fetches the base address of a card. This can be used for non-Rel port I/O. It returns a Windows error code, which will be ERROR_SUCCESS on success.
function WaitForIRQ(CardNum: LongWord): LongWord; cdecl; external 'AIO167.dll';
__declspec(dllimport) unsigned long WaitForIRQ(unsigned long CardNum);
WaitForIRQ() performs a wait, which will return when the card generates an IRQ. In normal use, spawn a worker thread which calls this function. It returns a Windows error code, which will be ERROR_SUCCESS on success.
An IOCTL with no .DLL wrapper can be called to cancel a pending wait. Contact the factory for details.
function WaitForIRQData(CardNum: LongWord; DataBytes: LongInt; pData: Pointer): LongWord; cdecl; external 'AIO167.dll';
__declspec(dllimport) unsigned long WaitForIRQData(unsigned long CardNum, signed long DataBytes, void *pData);
WaitForIRQData() performs a wait like WaitForIRQ(); if the wait completes successfully, it fills in the data buffer with words read from the card. For the 104-AIO16E, this should usually be half the FIFO, 512 words (equal to 1024 bytes).
InPortB, InPort, InPortL, OutPortB, OutPort, and OutPortL function like their ACCES32 counterparts.
RelInPortB, RelInPort, RelInPortL, RelOutPortB, RelOutPort, and RelOutPortL, are similar, but use a relative offset instead of an absolute address.
For example, if card number 0 has a base address of 0x300, RelOutPortB(0, 6, 0xF0) is equivalent to OutPortB(0x306, 0xF0).
| Function | Use |
|---|---|
| RelInPortB | Read a byte from a relative offset |
| RelInPort | Read a word (2 bytes) from a relative offset |
| RelInPortL | Read a double-word (4 bytes) from a relative offset |
| RelOutPortB | Write a byte to a relative offset |
| RelOutPort | Write a word (2 bytes) to a relative offset |
| RelOutPortL | Write a double-word (4 bytes) to a relative offset |
| InPortB | Read a byte from an absolute address |
| InPort | Read a word (2 bytes) from an absolute address |
| InPortL | Read a double-word (4 bytes) from an absolute address |
| OutPortB | Write a byte to an absolute address |
| OutPort | Write a word (2 bytes) to an absolute address |
| OutPortL | Write a double-word (4 bytes) to an absolute address
|