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13 Reading On-board PMIC and MPSoC Telemetry
The Infineon PMICs on the Ultra96-V2 connect to the ZU+ MPSoC device via PMBus. This
allows us to read important telemetry from the power regulators on board. To learn more about
this feature, read this blog and view this recorded webinar:
https://www.element14.com/community/events/5588/l/pmbus-and-power-supply-telemetry
You can also view a more advanced project related to this on Hackster:
https://www.hackster.io/AlbertaBeef/monitoring-power-on-the-avnet-platforms-e52a23
For now, we will show the simple method of reading back the telemetry.
1. Connect to the Linux Terminal either through SSH or the UART. To see the available I2C
busses available, type in your console
i2cdetect -l
Figure 24 – I2Cdetect
This shows all the available I2C busses on the Ultra96-V2. The one corresponding to the PMICs
is found based on the hardware connections in the schematic. The signals are called
‘PMIC_SCL’ and ‘PMIC_SDA’ and are connected to Channel 4 (SC/SD4) of the I2C Expander
U7, which is i2c-6 in Linux.
Figure 25 – PMIC on I2C Mux Channel 4
Summary of Contents for AES-ULTRA96-V2-G
Page 10: ...Page 10 Figure 2 Ultra96 V2 Block Diagram ...
Page 26: ...Page 26 Figure 23 Connected to Ultra96 V2 Via External Wi Fi ...
Page 29: ...Page 29 Figure 28 Telemetry from PMIC 0x13 43 Figure 29 Telemetry from MPSoC Sysmon ...
Page 42: ...Page 42 7 Create or select your Host ID Click Next Figure 41 Select Host Information ...