DS824 Datasheet, PDF (12/55 Pages) Xilinx, Inc – LogiCORE IP AXI Bus Functional Models (v3.00.a)

LogiCORE IP AXI Bus Functional Models (v3.00.a)
Table 6: AXI4-Lite Slave BFM Parameters (Cont’d)
BFM Parameters
Description
MAX_OUTSTANDING_TRANSACTIONS This defines the maximum number of outstanding transactions. Any attempt to
generate more traffic while this limit has been reached is handled by stalling until at
least one of the outstanding transactions has finished.
Default is 8.
MEMORY_MODEL_MODE
The parameter puts the slave BFM into a simple memory model mode. This means
that the slave BFM automatically responds to all transfers and does not require any
of the API functions to be called by the test.
The memory mode is very simple and only supports, aligned and normal INCR
transfers. Narrow transfers are not supported, and WRAP and FIXED bursts are
also not supported.
The size and address range of the memory are controlled by the parameters
SLAVE_ADDRESS and SLAVE_MEM_SIZE.
The value 1 enables this memory model mode. A value of 0 disables it.
Default is 0.
The slave channel level API and function level API should not be used while this
mode is active.
WRITE_RESPONSE_GAP
This configuration variable controls the gap, measured in clock cycles, between the
reception of the last write transfer and the write response.
Default is 0.
This configuration variable can be changed during simulation.
READ_RESPONSE_GAP
This configuration variable controls the gap, measured in clock cycles, between the
reception of the read address transfer and the start of the first read data transfer.
Default is 0.
This configuration variable can be changed during simulation.
RESPONSE_TIMEOUT
This configuration variable, measured in clock cycles, is the value used to determine
if a task that is waiting for a response should timeout.
Default = 500 clock cycles.
A value of zero means that the timeout feature is disabled.
This configuration variable can be changed during simulation.
STOP_ON_ERROR
This configuration variable is used to enable/disable the stopping of the simulation
on an error condition.
The default value of one stops the simulation on an error.
This configuration variable can be changed during simulation for error testing.
This is not used for timeout errors; such errors always stop simulation.
CHANNEL_LEVEL_INFO
This configuration variable controls the printing of channel level information
messages. When set to 1 info messages are printed, when set to zero no channel
level information is printed.
The default (0) disables the channel level info messages.
FUNCTION_LEVEL_INFO
This configuration variable controls the printing of function level information
messages. When set to 1 info messages are printed, when set to zero no function
level information is printed.
The default (1) enables the function level info messages.
DS824 July 25, 2012
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Product Specification