The System Monitor (SYSMON) Analog-to-Digital Converter (ADC) measures die temperature and voltage on the hardware 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. Refer to the following for more information on specific device architecture.
- UltraScale Architecture System Monitor User Guide (UG580)
- 7 Series FPGAs and Zynq-7000 SoC XADC Dual 12-Bit 1 MSPS Analog-to-Digital Converter User Guide (UG480)
- Versal Adaptive SoC System Monitor Architecture Manual (AM006)
The hw_sysmon data is stored in dedicated registers called status registers accessible through the hw_sysmon_reg object. You can get the contents of the System Monitor registers by using the get_hw_sysmon_reg command.
Every device that supports the System Monitor automatically has 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
Volts.
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 [lindex [get_hw_sysmons] 0]Complete list of all the System Monitor commands can be found in Description of hw_sysmon Tcl Commands.