Known Issues of openPOWERLINK Protocol Stack {#page_known_issues}

[TOC]

DE2i-150 board flash support {#sect_known_issues_de2i150_flash}

Description

Programming the firmware onto the serial flash device is not supported.

Workaround

Use JTAG to download the FPGA bitstream and Nios II elf manually.

Windows PCIe network device {#sect_known_issues_winpcie_netdev}

Description

Windows network device actions such as disable, restart and enable network adapter are not supported.

Workaround

Don't use these actions.

Linux PCIe driver signing {#sect_known_issues_linpcie_devsign}

Description

During kernel module insertion driver signing warnings are raised on systems with CONFIG_MODULE_SIG enabled in the Linux kernel configuration.

Workaround

The warnings can be ignored.

Linux PCIe CPU load {#sect_known_issues_linpcie_load}

Description

High CPU load could be caused because of low POWERLINK cycle times and high PDO sizes.

Workaround

Use the application synchronization period configuration (\ref tOplkApiInitParam::minSyncTime) to reduce the frequency of synchronization processing.

NDIS intermediate driver multiple network adapters {#sect_known_issues_ndis_multi}

Description

In a system with multiple network adapters it is not possible to select the adapter to be used. The driver is configured to automatically select the first driver for network communication.

Workaround

Select first adapter for openPOWERLINK.

Linux kernel module with edrv-i210 unhandled IRQ {#sect_known_issues_linkern_i210}

Description

For the configuration of openPOWERLINK MN which uses edrv-i210 kernel module, after stopping the MN application, the Linux kernel reports a warning for 'unhandled IRQ' for the interrupt pin assigned to Intel's i210 NIC. The warning message is

irq XX: nobody cared (try booting with the "irqpoll" option)

This occurs on PCs where Intel's i210 NIC card shares an interrupt pin with any of the other devices such as USB hub controller.

Workaround

The warning can be ignored as it does not affect the functionality and performance.

MN demo application compilation on 32 bit Windows with NDIS drivers {#sect_know_issues_win32_compilation}

Description

The MN demo application (demo_mn_console) fails to compile on a 32 bit Windows system while using the Kernel stack on PCIe card or Windows Kernel Module [stack libraries] (\ref sect_windows_components_libs) with following error

    > error LNK1120: 1 unresolved externals
    > error LNK2019: unresolved external symbol _CancelIoEx referenced in function _system_stopSyncThread
    > (apps\demo_mn_console\build\windows\system-windows.obj) demo_mn_console
    > warning C4013: CancelIoEx undefined; assuming extern returning int (apps\common\src\system\system-windows.c) demo_mn_console

The error is produced due to missing compiler options to specify the required 32 bit version of the system library which will be resolved in future release.

Windows PCIe queue corruption with virtual Ethernet {#sect_know_issues_winpcie_veth}

Description

The openPOWERLINK solution using Windows PCIe design with virtual Ethernet interface enabled, may lead to issues with the queue corruption. The queue corruption is noticed when there is excessive non-POWERLINK communication through the virtual Ethernet interface.

Workaround

On systems which do not require virtual Ethernet with the Windows PCIe design, the issue can be avoided by disabling virtual Ethernet interface (CONFIG_INCLUDE_VETH).

Avnet LX150T MN design initilization {#sect_known_issues_avent-lx150t_initilization}

Description

The Avnet LX150T MN design fails to initialize randomly reporting error with the host interface initialization.

Problem arises due to unknown bug in the Xilinx ISE 14.7 which results in inconsistent placement and routing on modifications to any IP core parameters such as base address, and internal register configurations.