For the wRTOSPnp and wRTOSPnpNet drivers, you can choose to disable allocation of I/O Ports, use line-based interrupts (IRQs), request assignment of a specific IRQ, and share the requested IRQ with other wRTOS devices through the wRTOS Properties page for a selected wRTOS PCI/PCIe device.
Note: This does not apply to the wRTOSNL2PnpNet driver, the I/O Port Resources and IRQs of which cannot be modified.
Note: Some changes to this page require a reboot of the machine.
Filtering out I/O Port Resources
wRTOS allows you to filter out I/O port resources. This is helpful when there is a conflict with the I/O space of another device. This procedure can be done after Converting a Windows Device to wRTOS.
To filter out I/O Port resources:
- Open the Windows Device Manager. You can access this from the wRTOS Settings home page.
- Right-click on the converted device you want to filter I/O Port resources for, and then select Properties.
- In the Properties dialog, click wRTOS.
- Check the Disable I/O Port allocation check box.
- Click OK.
If you get a message saying the system must be restarted, click OK.
Using Line-based Interrupts (IRQs)
If you want to use message-based interrupts exclusively with the selected device, no configuration is necessary, and you can click OK or Cancel to close the wRTOS properties page dialog box. If you want to use line-based interrupts with the MSI-capable device, follow the steps below.
Note: By configuring both line-based and message-based interrupts for an MSI-capable device, you make it possible for some RTSS applications to communicate with the device via line-based interrupts while others use message-based interrupts. However, you cannot attach to a device using message-based and line-based interrupts at the same time. If multiple applications attach simultaneously to a single MSI-capable device, they must all use the same interrupt type.
To use line-based interrupts (IRQs):
- Open the Windows Device Manager. You can access this from the Network / Interfaces page in wRTOS Settings.
- Right-click on the converted device you want to filter I/O Port resources for, and then select Properties.
- In the Properties dialog, click wRTOS.
- Check the Use line-based interrupts (IRQs) check box.
- Configure the available IRQ settings:
- Request a specific IRQ – check this box to request a specific IRQ value, which you can enter in the Requested IRQ text box. If this check box remains unchecked, the subsystem will provide you with an IRQ if one is available.
You can find the IRQ in Windows Device Manager by right-clicking on the Network Card's icon and selecting Properties.
- Requested IRQ – enter the IRQ value you want to request for this device.
- Share requested IRQ with other wRTOS devices – check this box to allow the IRQ to be shared with other wRTOS-owned devices.
- Click OK.
If you get a message saying the system must be restarted, click OK.
- Reboot the machine so your IRQ changes take effect.
Note: Some applications communicate with non-MSI devices by other means, for example, polling. In these cases, deselecting Use line-based interrupts (IRQs) frees up line-based resources for use by other devices.
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