F&S Support Forum

Hello,

with the command
(Code, 1 line)


You get an overview of all configured clocks and their actual rates. Maybe You can spot a clock that matches your measurement.

Do you use a LVDS Display? LVDS_Clock/7=Pixelclock, so 250Mhz/7 = 35MHz which would be…

Hello,
after upgrading to linux kernel 5.15 and running the GPU with etnaviv driver (before it was disabled), i see in EMC (german "EMV-Messung") a sharp spike at almost exactly 250Mhz, which i cannot see in the software version before (linux 4.9 with no…

Creating a SBOM in Yocto

As software supply chain security becomes increasingly critical and the introduction of the Cyber Resilience Act generating a Software Bill of Materials (SBOM) is now a requirement for embedded Linux systems.

A SBOM is a detailed…

Hello,

1. Is the uboot that is build with the yocto build that one that is already installed on the board?
By default, yes but if you have a special customer variant it may differ.


2. What would be the easiest way to modify it?
The easiest way would be the…

Hi there,
we have a two color indicator LED connected to two GPIOs. The LED shows different states of the system. As the LEDs are controlled by the M7 so it takes some time till the user can see that the system is running.
What we need, is that both…

Hello Didier,

• UART_B is the direct UART signal with TTL, so a RS232 transceiver is still needed. For revision 1.00 switch the RX- and TX-signal.
• UART_C on pin 36 + 38 should already be the RS232 signals and active. No need to change the device-tree. You

…

Thanks for the feedback.

Just to avoid misunderstandings, can you confirm the following?

* UART_B (pin13+15) is on a rev 1.00 board a regular RS232, but with TTL levels?
* UART_C is the default UART on pin 36+38, so nothing to be changed in the device tree…

Hello Didier,

it is the label on the HDMI port, but revision 1.00 is enough.

For UART_B the RX and TX pads are switched, but you can set them right via the pinctrl in the Device-Tree.
Under arch/arm64/boot/dts/F+S/armstonemx8mp.dtsi:
(Code, 10 lines)

You will…

Hi,

When booting, U-boot shows the following
(Code, 23 lines)

I see "Board: armStoneMX8MP Rev 1.00 (2x LAN, WLAN, eMMC, 1x DRAM)", so I assume this is Rev 1.00?

Not sure how to get the serial number. Don't see a label on the board with the serial number (but…

Hello,

for UART_B and UART_C there are different hardware variants. Could you post the revision of your board as well as the serial number on the label?
If you do not want to share the serial number here, you can also write an E-Mail to support@fs-net.de…