- In the ILA – hw_ila_1 dashboard, locate the Trigger Mode Settings area and set Trigger mode to ADVANCED_ONLY.
- In the Capture Mode Settings area, set the Trigger position to 512.
- In the Trigger State Machine area click the Create
new trigger state machine link.
- In the New Trigger State Machine File dialog box, set the name of the state
machine script to txns.tsm.
- A basic template of the trigger state machine script is displayed in the
Trigger State Machine gadget. Expand the trigger state machine gadget in the ILA
dashboard. Copy the script below after line 17 of the state machine script and
# The "wait_for_arvalid" state is used to detect the start # of the read address phase of the AXI transaction which # is indicated by the axi_arvalid signal equal to '1' # state wait_for_arvalid: if (design_1_i/system_ila_0/U0/net_slot_0_axi_arvalid == 1'b1) then goto wait_for_rready; else goto wait_for_arvalid; endif # # The "wait_for_rready" state is used to detect the start # of the read data phase of the AXI transaction which # is indicated by the axi_rready signal equal to '1' # state wait_for_rready: if (design_1_i/system_ila_0/U0/net_slot_0_axi_rready == 1'b1) then goto wait_for_rlast; else goto wait_for_rready; endif # # The "wait_for_rlast" state is used to detect the end # of the read data phase of the AXI transaction which # is indicated by the axi_rlast signal equal to '1'. # Once the end of the data phase is detected, the ILA core # will trigger. # state wait_for_rlast: if (design_1_i/system_ila_0/U0/net_slot_0_axi_rlast == 1'b1) then trigger; else goto wait_for_rlast; endifNote: Use the state machine to detect the various phases of an AXI read transaction:
- Beginning of the read address phase
- Beginning of the read data phase
- End of the read data phase
- Arm the trigger of the ILA by right-clicking the hw_ila_1 core in the Hardware Manager window and selecting
- In the Trigger Capture Status window, note that the ILA core is waiting for
the trigger to occur, and that the trigger state machine is in the
wait_for_a_valid state. Note that the pre-trigger capture of 512 samples has
- In the Tcl console, run the read transaction that you set up in the previous
section of this
run_hw_axi $rtNote: The ILA core has triggered and the trigger mark is on the sample where the
axi_rlastsignal is equal to '1', just as the trigger state machine program intended.