get_hw_sysmons - 2024.1 English

Vivado Design Suite Tcl Command Reference Guide (UG835)

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2024.1 English

Get list of hardware SysMons.


get_hw_sysmons [‑of_objects <args>] [‑regexp] [‑nocase] [‑filter <arg>]
    [‑quiet] [‑verbose] [<patterns>]


Hardware sysmons


Name Description
[-of_objects] Get 'hw_sysmon' objects of these types: 'hw_server hw_target hw_device'.
[-regexp] Patterns are full regular expressions
[-nocase] Perform case-insensitive matching. (valid only when -regexp specified)
[-filter] Filter list with expression
[-quiet] Ignore command errors
[-verbose] Suspend message limits during command execution
[<patterns>] Match the 'hw_sysmon' objects against patterns. Default: *


Hardware, Object


Returns the Sysmon debug core objects defined on the current hardware device.

The System Monitor (SYSMON) Analog-to-Digital Converter (ADC) is used to measure die temperature and voltage on the hw_device. The Sysmon monitors the physical environment via on-chip temperature and supply sensors. The ADC provides a high-precision analog interface for a range of applications. The ADC can access up to 17 external analog input channels. Refer to UltraScale Architecture System Monitor User Guide (UG580), or 7 Series FPGAs and Zynq-7000 SoC XADC Dual 12-Bit 1 MSPS Analog-to-Digital Converter User Guide (UG480) for more information on a specific device architecture.

The hw_sysmon data is stored in dedicated registers called status registers accessible through the hw_sysmon_reg object. The values of the system monitor registers can be returned by the get_hw_sysmon_reg command.

Every device that supports the system monitor will automatically have one or more hw_sysmon objects created when refresh_hw_device is called. When the hw_sysmon object is created, it is assigned a property for all the temperature and voltage registers, as well as the control registers. On the hw_sysmon object, the values assigned to the temperature and voltage registers are already translated to Celsius/Fahrenheit and Voltage.

Although you can use the get_hw_sysmon_reg command to access the hex values stored in registers of a system monitor, you can also retrieve values of certain registers as formatted properties of the hw_sysmon object. For example, the following code retrieves the TEMPERATURE property of the specified hw_sysmon object rather than directly accessing the hex value of the register:

set opTemp [get_property TEMPERATURE [get_hw_sysmons]

This command returns a list of hw_sysmon objects on the current or specified hw_device, or returns an error if it fails.


-of_objects <arg> - (Optional) Return the hw_sysmon objects of the specified hw_server, hw_target, or hw_device. The objects must be specified using the appropriate get_hw_* command .
Note: The -of_objects option requires objects to be specified using the get_* commands, such as get_cells or get_pins, rather than specifying objects by name. In addition, -of_objects cannot be used with a search <pattern>.
-regexp - (Optional) Specifies that the search <patterns> are written as regular expressions. Both search <patterns> and -filter expressions must be written as regular expressions when this argument is used. Xilinx® regular expression Tcl commands are always anchored to the start of the search string. You can add ".*" to the beginning or end of a search string to widen the search to include a substring. See for help with regular expression syntax.
Note: The Tcl built-in command regexp is not anchored, and works as a standard Tcl command. For more information refer to

-nocase - (Optional) Perform case-insensitive matching when a pattern has been specified. This argument applies to the use of -regexp only.

-filter <args> - (Optional) Filter the results list with the specified expression. The -filter argument filters the list of objects returned by get_hw_sysmons based on property values on the Sysmon cores. You can find the properties on an object with the report_property or list_property commands. In the case of the "hw_sysmon" object, "NAME", "VCCINT", and "VCCAUX" are some of the properties that can be used to filter results.

The filter search pattern should be quoted to avoid having to escape special characters. String matching is case-sensitive and is always anchored to the start and to the end of the search string. The wildcard “*” character can be used at the beginning or at the end of a search string to widen the search to include a substring of the property value.
Note: The filter returns an object if a specified property exists on the object, and the specified pattern matches the property value on the object. In the case of the "*" wildcard character, this will match a property with a defined value of "".
For string comparison, the specific operators that can be used in filter expressions are "equal" (==), "not-equal" (!=), "match" (=~), and "not-match" (!~). Numeric comparison operators <, >, <=, and >= can also be used. Multiple filter expressions can be joined by AND and OR (&& and ||). The following gets input pins that do NOT contain the “RESET” substring within their name:
get_pins * -filter {DIRECTION == IN && NAME !~ "*RESET*"}
Boolean (bool) type properties can be directly evaluated in filter expressions as true or not true:
-quiet - (Optional) Execute the command quietly, returning no messages from the command. The command also returns TCL_OK regardless of any errors encountered during execution.
Note: Any errors encountered on the command-line, while launching the command, will be returned. Only errors occurring inside the command will be trapped.
-verbose - (Optional) Temporarily override any message limits and return all messages from this command.
Note: Message limits can be defined with the set_msg_config command.

<patterns> - (Optional) Match hw_sysmons against the specified patterns. The default pattern is the wildcard '*' which gets a list of all hw_sysmons available on the current hardware device.


The following example gets the hw_sysmon objects defined on the current hardware device:

get_hw_sysmons -of_objects [current_hw_device]