F-Tile Avalon® Streaming Intel® FPGA IP for PCI Express* User Guide

ID 683140
Date 10/11/2023

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7.6.8. ebfm_cfgrd_nowt Procedure

The ebfm_cfgrd_nowt procedure reads up to four bytes of data from the specified configuration register and stores the data in the BFM shared memory. This procedure returns as soon as the VC interface module has accepted the transaction, allowing other reads to be issued in the interim. Use this procedure only when successful completion status is expected and a subsequent read or write with a wait can be used to guarantee the completion of this operation.




ebfm_cfgrd_nowt(bus_num, dev_num, fnc_num, regb_ad, regb_ln, lcladdr)



PCI Express bus number of the target device.


PCI Express device number of the target device.


Function number in the target device to be accessed.


Byte-specific address of the register to be written.


Length, in bytes, of the data written. Maximum length is four bytes. The regb_ln and regb_ad arguments cannot cross a DWORD boundary.


BFM shared memory address where the read data should be placed.