National Instruments PCI-DIO-96 User Manual

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National Instruments PCI-DIO-96 User Manual Manual pdf 56 page image

Appendix B Register-Level Programming — Programming© National Instruments Corporation B-15 PCI-DIO-96/PXI-6508/PCI-6503 User ManualTable B-3 contains common terms used in the programming examples.PCI InitializationTo program at the register level without NI-DAQmx or Traditional NI-DAQ (Legacy), youmust know the PCI-DIO-96 or PXI-6508 base memory address and, if using interrupts, installan interrupt handler. This manual does not discuss writing an interrupt handler. In order forthe board to operate properly, you must configure the PCI MITE ASIC. NI-DAQmx orTraditional NI-DAQ (Legacy) usually performs this function, but if you are not usingNI-DAQ, then you must configure the PCI MITE ASIC.The following sections explain how to configure the PCI MITE ASIC. You must implementthe references made to PCI BIOS 1 calls.To configure the PCI MITE chip, you must first write an algorithm that finds and stores allconfiguration information about the board. To do this, use PCI BIOS calls to search PCIconfiguration space for the National Instruments vendor ID (0x1093) and PCI-DIO-96 deviceID (0x0160), PXI-6508 device ID (0x13c0), or PCI-6503 device ID (0x17d0). If a board isfound, the algorithm can store all the board’s configuration information into a data structure.Table B-3. Common Programming Example TermsTerm DefinitionPort A Address of PPI A Port A Register (Base Address + 0x00)Port B Address of PPI A Port B Register (Base Address + 0x01)Port C Address of PPI A Port C Register (Base Address + 0x02)8255Cnfg Address of PPI A Configuration Register (Base Address + 0x03)Ctr0 Address of 82C53 Counter 0 Register (Base Address + 0x10)Ctr1 Address of 82C53 Counter 1 Register (Base Address + 0x11)CntrCnfg Address of 82C53 Configuration Register (Base Address + 0x13)IREG1 Address of Interrupt Control Register 1 (Base Address + 0x14)IREG2 Address of Interrupt Control Register 2 (Base Address + 0x15)Write (address, data) Generic function call for a memory space Write of data to addressRead (address) Generic function call for a memory space Read from addressCWrite (offset, data) PCI configuration space write of data to PCI configuration space offset1 To obtain more information on PCI BIOS calls from the PCI SIG, go to www.pcisig.com.