You must also include a traffic generator process while simulating your application to generate data traffic on the I/O traffic generators, or to capture output data from the emulation process. The Xilinx provided Python or C++ library can be used to create the traffic generator code as described below. Also, an application can communicate to multiple I/O interface. It is not necessary to have each instance of I/O utilities to be in a separate process/thread. In case your application demands it, you might consider the non-blocking version APIs (details provided in the following section).
- For Python, set
$PYTHONPATH
on the command terminal:setenv PYTHONPATH $XILINX_VIVADO/data/emulation/hw_em/lib/python:\ $XILINX_VIVADO/data/emulation/ip_utils/xtlm_ipc/xtlm_ipc_v1_0/python/
- Sample Python code to connect with the
gt_master
instance would look like the following:Blocking Send from xilinx_xtlm import ipc_axis_master_util from xilinx_xtlm import xtlm_ipc import struct import binascii #Instantiating AXI Master Utilities master_util = ipc_axis_master_util("gt_master") #Create payload payload = xtlm_ipc.axi_stream_packet() payload.data = "BINARY_DATA" # One way of getting "BINARY_DATA" from integer can be like payload.data = bytes(bytearray(struct.pack("i", int_number))) More info @ https://docs.python.org/3/library/struct.html payload.tlast = True #AXI Stream Fields #Optional AXI Stream Parameters payload.tuser = "OPTIONAL_BINARY_DATA" payload.tkeep = "OPTIONAL_BINARY_DATA" #Send Transaction master_util.b_transport(payload) master_util.disconnect() #Disconnect connection between Python & Emulation
- Sample Python code to connect with the
gt_slave
instance would look like the following:Blocking Receive from xilinx_xtlm import ipc_axis_slave_util from xilinx_xtlm import xtlm_ipc #Instantiating AXI Slave Utilities slave_util = ipc_axis_slave_util("gt_slave") #Sample payload (Blocking Call) payload = slave_util.sample_transaction() slave_util.disconnect() #Disconnect connection between Python & Emulation
- For non-blocking version APIs in Python, it can be found
at:
$XILINX_VIVADO/data/emulation/ip_utils/xtlm_ipc/xtlm_ipc_v1_0/python/xilinx_xtlm.py