I am currently using a STM32G081b eval board with a STM32G474QE MCU I am using the demoucpd example code if i plug in display for my laptop it works over usb c but doesn't on mobiles device does anyone know why?
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‎2021-09-17 4:26 AM
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‎2021-09-17 5:04 AM
> I am currently using a STM32G081b eval board with a STM32G474QE MCU
Doesn't that board have a STM32G081RBT6 chip?
USB-PD is messy. It needs to request the correct voltages, it might be requesting something else. Perhaps look at differences in what the displays need.
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‎2021-09-20 12:59 AM
Yes it does have a STM32G081RBT6 chip and the USB-PD side looks correct I have created my own profiles for the voltage which works fine. Using my MacBook pro and hp laptop I can get power, display yet when I try tablets its only provides power I have seen from a STM32 demo video that you can get display out of mobile devices/tablets.
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‎2021-09-21 11:23 PM
Dear @NA.1067pps​
Further information regarding the DP scenario is available in the wiki page.
To understand your issue, you could generate a .cpd trace (Specific tools section).
Regards,
Yohann
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‎2021-09-22 2:01 AM
This is the log I get when I plug in an ipad just gives me charge no display
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‎2021-09-22 2:02 AM
Here is a trace from my laptop that gives me charge and display
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‎2021-09-22 2:10 AM
Thanks for the txt log but could you please provide the .cpd file like described in the wiki page:
"The trace files are saved in c:\Users\%username%\AppData\Local\Temp\STM32CubeMonitor-UCPD\Acquisition\ with ".cpd" extension.
The cpd files are a pretty good entry point to report an issue to our support team, it provides helpful debug information of the USB-PD stack behavior. "
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‎2021-09-22 2:30 AM
Where is it stored if you are running on a macbook?
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‎2021-09-22 3:22 AM
Hello @NA.1067pps​
be carefull : all tablets / mobiles phones are not supporting display through the type C cable.
What is the brand and model of your tablet and mobile phone ? Which iPad version ?
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‎2021-09-22 3:31 AM
I am using is the iPad 11 inch model A2228 running latest os version which does support display.
