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This file contains the users interface instructions for the packet generator BFM.

To trigger the generation of a new packet on the packet_out interface, a rising edge

must be applied to the request input pin.  The output ready is indicated by the

packet_out.drdy output pin going high.  The BMF must also be configured to be enabled.

The stimulus access port address mapping is presented below:

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Name              Address  Bit(s)    Description

Control Register     0      0        Enable

                            1        Open file trigger, Write a '1'

                                     to this bit to trigger file open

                                     This bit is self clearing.

                          31 - 2     Don't care

Configuration        1     3-0       Data coding mode

Register                             0000   Incrementing

                                     0001   Random

                                     0010   Load from file

                                     0011   User Data

                          31 - 4     Don't care

Error Register       2      Read only definition of error indications

Seed Register        3      31-0     Seed value for random number

                                     generation

User Data Memory  0x1000 – 0x107F    Bits 7 downto 0 of the data are written to the

                                     addressed location.

The fname, stm_text type, input enables the definition of a file name to be dynamic.

Set the file name, stm_text input, to the file you wish to open for loading data

from.  Then write the open file trigger bit to open the file.  Any previouslly

opened files will be closed first, so you do not have to worry about that.  Once

a file is opened, it will be read from until there is no more lines to read, or,

the output packet size has been met.  The next request will have the file being

loaded from where it left off on the last load.  This enables many packets to be

placed in one file, and loaded request to request without having to deal with file

details.

To set the user data, write the desired packet to the User Data Memory before the

request for data.  Configure generation to be User Data.

The generic on the BFM enables a particular BMF to be identified if there are

more than one of this type in an environment.