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  3. AR# 51432: 14.2 EDK - ChipScope AXI Monitor - Error when Connecting to a Streaming Interface

AR# 51432

14.2 EDK - ChipScope AXI Monitor - Error when Connecting to a Streaming Interface

Description

When trying to connect the ChipScope AXI Monitor to a streaming interface, the following errors occurs:

ERROR:EDK - Could not connect MONITOR chipscope_axi_monitor_0's RESET MON_AXI_ARESETN to INSTANCE <peripheral>'s RESET port as the latter is itself un-connected
ERROR:EDK - Could not connect MONITOR chipscope_axi_monitor_0's RESET MON_AXI_ACLK to INSTANCE <peripheral>'s RESET port as the latter is itself un-connected

This error occurs for any peripheral connected to a streaming interface, including those created with the Create/Import Peripheral Wizard.

Solution

This error occurs because the ChipScope AXI Monitor clock and reset ports are associated with the AXI4-Stream clock and reset ports. If these ports do not exist for the AXI4-Stream interface, the AXI Monitor is not able to populate with a clock and reset connection.

There are a few possible workarounds for this issue.

  • Override the connection of the AXI Monitor's clock and reset ports
    • Modify system.mhs to include the MON_AXI_ARESETN port
    • Ensure that the resetsignal is the same as that of the debug target reset port

BEGIN <peripheral>
PARAMETER INSTANCE = <peripheral_0>
PARAMETER HW_VER = 1.00.a
BUS_INTERFACE M_AXIS = <peripheral>_M_AXIS
BUS_INTERFACE S_AXIS = microblaze_0_M0_AXIS
PORT ACLK = clk_400_0000MHz
PORT ARESETN = proc_sys_reset_0_Interconnect_aresetn
END

BEGIN chipscope_axi_monitor
PARAMETER INSTANCE = chipscope_axi_monitor_0
PARAMETER HW_VER = 3.05.a
PARAMETER C_USE_INTERFACE = 1
BUS_INTERFACE MON_AXI_S = sdfsf_0_M_AXIS
PORT CHIPSCOPE_ICON_CONTROL = chipscope_icon_0_control0
PORT MON_AXI_ACLK=clk_400_0000MHz
PORT MON_AXI_ARESETN = proc_sys_reset_0_Interconnect_aresetn
END
  • Use the ChipScope ILA core instead of AXI Monitor
    • For more information on how to use the ChipScope ILA core in XPS, please refer to DS299LogiCORE IPChipScope Pro Integrated Logic Analyzer (ILA)
  • Change the MPD of MicroBlaze by extending the BUSIF tags for the clock and reset to include the AXI4-S ports
    • Note: Do not modify the MicroBlaze MPD in the Xilinx Tools install directory
    • Copy the MicroBlaze core <root>:/Xilinx/14.2/ISE_DS/EDK/hw/XilinxProcessorIPLib/pcores/microblaze_v8_40_a and place it in the pcore folder of the project directory
    • In XPS, right-click microblaze_0 -> Delete Instance -> Delete instance but do not remove the nets -> OK
    • Project -> Rescan User Repository
    • In IP Catalog, expand Project Local PCores/Processor
    • Right-click microblaze -> Add IP -> Yes
    • Select pertinent configurations for the user design
    • Click Advanced -> Buses -> Number of Steam Links = 1 -> OK
    • User will make necessary connections and settings (XPS can do this automatically, but new LMB, BRAM, and BRAM CTRL instances will be created)
    • Make necessary connections
    • Project -> Run DRC to confirm that the error is gone
AR# 51432
Date 02/14/2013
Status Active
Type General Article
Devices
  • FPGA Device Families
Tools
  • EDK
IP
  • Embedded Processing
  • FPGA Features and Debug
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