Acces I/O products PCIe-DIO-24S User Manual

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Acces I/O products PCIe-DIO-24S User Manual Manual pdf 11 page image

Manual PCIe-DIO-48S PCI Express Digital I/O Card11Chapter 4: Address SelectionThe Vendor ID for this card is 0x494F. (ASCII for "IO")The Device ID for the PCIe-DIO-48S is 0x0E61.The Device ID for the PCIe-DIO-48 is 0x0C61.The Device ID for the PCIe-DIO-24S is 0x0E53.This card uses I/O addresses offset from the base address assigned by the PCIe bus. The addressspaces are defined in the programming section of this manual.PCIe architecture is Plug-and-Play. This means that the BIOS or Operating System determines theresources assigned to PCIe cards rather than the user selecting those resources with switches orjumpers. As a result, you cannot set or change the card's base address or IRQ level. You can onlydetermine what the system has assigned.The following information is for advanced users only:The PCIe bus supports 64K of I/O address space, so your card's addressesmay be located anywhere in the 0000h to FFFFh range.To determine the base address that has been assigned, run the PCIFindutility program. This utility will display a list of all the cardsdetected on the PCI/PCIe bus, the addresses assigned to each function oneach of the cards, and the respective IRQs.Alternatively, Windows systems can be queried to determine whichresources were assigned. In these operating systems, you can use eitherPCIFind, or the Device Manager utility from the System Properties Appletof the control panel. The card is installed in the Data Acquisitionclass of the Device Manager list. Selecting the card, clickingProperties, and then selecting the Resources Tab will display a list ofthe resources allocated to the card.In Linux you can use the LSPCI command to determine this information. APCIFind.pl script is also provided which may simplify this task.An example of how to locate PCIe card resources in DOS is provided within the PCI\SOURCE directory, under your installation directory. Thiscode runs in DOS, and uses the PCI defined interrupt BIOS calls to querythe PCI bus for card specific information. You will need the Device IDand Vendor ID listed above to use this code.The card uses more resources than you usually need be concerned with.PCIFind will show only the most commonly required information to reduceconfusion.For those who require it, be aware of the following:BAR[0]: memory mapped PEX8311BAR[1]: I/O mapped PEX8311BAR[2]: I/O mapped card registers (←all most software needs)