Activity

From 03/17/2026 to 04/15/2026

NO 09:04 PM Software Development: SPI bringup: Are there any reference examples of software using SPI? I'm attempting to configure the QUP to use SPI on my carrier board.
Here's my device tree modification: Nathan Olson

WE 04:19 PM PCB Development: RE: 4V on 3V3-SOM!: Unfortunately this cannot be addressed on the SOM as the SOM will hang if this voltage is dropped lower than 4V.
For future baseboard revisions there will need to be a regulator in between the SOM and the downstream components on this... William Evans
NO 04:06 PM PCB Development: RE: 4V on 3V3-SOM!: Thanks Will. The pins are tied directly to a power plane on my prototype boards, so I'll try breaking the connector pins as you suggest.
Will this issue be fixed in later versions of the SOM, or should I plan on adding a 3V3 regulator... Nathan Olson
WE 01:07 PM PCB Development: RE: 4V on 3V3-SOM!: Hello Nathan,
The PMICs on the SOM support changing the output voltage of this pin. The idea was to have it at 3.3V but unfortunately the SOM hangs if this voltage is lower than 4V.
As a result we had to re-spin our development boa... William Evans

NO 08:50 PM PCB Development: 4V on 3V3-SOM!: Hello,
Why is 3V3-SOM outputting 4V? Is there a way to change this to 3.3V?
I see that the devkit schematic shows it as 4V, but the datasheet and Carrier Board Design Guide (and the name!) show it as 3.3V. Unfortunately I just rece... Nathan Olson

NO 03:46 PM Software Development: RE: Long build times: That matches what I'm seeing, although it seems your machine is much faster than mine. For me it's about 7 hours for a clean build, and 28 minutes for a rebuild. Nathan Olson
GG 02:36 AM Software Development: RE: Long build times: Hi Nathan,
We have similar experiences. Unfortunately we do not currently have a fix. We are building off of Qualcomm's methodology and there is a lot of complexity there that we haven't needed to dig into yet. We will update this is... Gregory Gluszek
GG 02:42 AM Software Development: RE: Configuring the QUP pins: Hi Nathan,
Please refer to the [[Configuring the QUP Ports (I2C I3C SPI and UART)]] wiki page which has recently been published for details on how to do this.
Let me know if you have any questions or issues.
Thanks,
Greg
Gregory Gluszek

NO 12:06 AM Software Development: Configuring the QUP pins: Hello,
My carrier board uses several QUP pins for I2C, UART, and SPI. How do I configure them? I prefer a device-tree solution over a userspace solution. Nathan Olson

NO 06:14 PM Software Development: Long build times: Hello,
I am extending the BSP with my own layer. It seems like whenever I make a change, a lot of unrelated files get recompiled (for example cameradlkm-1.0.qcom-r0, qcom-displaydlkm-git-r0, qcom-pal-git-r0, qcacld-wlan-git-r0, ...). ... Nathan Olson

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Mity CPU Platforms » MitySOM-QC6490