Recent posts

#41

A20 / Re: setup olimage via UART wit...

Last post by lobra2 - January 16, 2025, 10:29:02 AM

Thank you! Since Armbian for the Lime2 is a community supported automated build i suppose it will not take very long before i setup Olimage from ssh instead!

#42

NXP / Re: Stackup thickness - iMX8 S...

Last post by LubOlimex - January 16, 2025, 09:45:20 AM

We don't have a table suitable for publishing and it will require further effort to make it presentable. But such a table is not really needed since all lengths can be measured from the sources.

I don't think the DRAM in our board is running at max speed either. Have to check the sources.

For RAM related issues it is good idea to also check the iMX forums and maybe use the iMX DDR tool: https://community.nxp.com/t5/i-MX-Processors-Knowledge-Base/i-MX-8M-Family-DDR-Tool-Release/ta-p/1104467

#43

NXP / Re: Stackup thickness - iMX8 S...

Last post by cushychicken - January 15, 2025, 09:48:03 PM

Yeah, I figured that these values were populated as defaults when loaded in the newer version of Kicad. I did not populate the values you see in the picture.

Is this stackup table documented anywhere? Do you have an impedance geometry table with target impedances for all traces in the system?

Asking because I calculated a separate stackup than the one you're using, and I'm thinking I introduced an issue somewhere - my DRAM is not able to run at full speed.

#44

ESP32 / Re: ESP32 GATEWAY board revisi...

Last post by Colomer_1978 - January 15, 2025, 07:04:16 PM

Yes I guess it's not a problem of the board, but didn't find where the problem is and wanted to discard any option.

I will download the driver of the CH340T.

Thanks for your reply.

#45

RT5350F / Re: Spectrum Digital XDS100V2 ...

Last post by LubOlimex - January 15, 2025, 12:57:32 PM

Maybe check this OpenOCD thread: https://openwrt-devel.openwrt.narkive.com/e5kS1C19/openocd-and-rt3050-5350

#46

NXP / Re: Stackup thickness - iMX8 S...

Last post by LubOlimex - January 15, 2025, 11:01:26 AM

Upon investigating further it turns out the KiCAD version used to create the design is KiCAD version 5.1.4 (the KiCAD from your picture is quite newer) - old KiCAD had only total thickness, there is no per layer thickness. The version of the KiCAD used is visible in the page info at the bottom right of the PDF exports. To avoid problems upon conversation it is highly suggested to use the same KiCAD version for this design (aka KiCAD 5.1.4)

#47

NXP / Re: Stackup thickness - iMX8 S...

Last post by LubOlimex - January 15, 2025, 10:50:23 AM

Thanks for notice, it is probably left over from old board. We will fix it for next release of the design files. It is 1.6mm indeed.

TOP 1oz (0.035mm)
Prepreg 1080*1 0.075mm
PWR Hoz(0.018mm)
Prepreg 2116*1 0.115mm
LN3 Hoz(0.018mm)
Adjust Core 1.065mm
LN4 Hoz(0.018mm)
Prepreg 2116*1 0.115mm
GND Hoz(0.018mm)
Prepreg 1080*1 0.075mm
BOT 1oz (0.035mm)

TOTAL: 1.6mm

#48

Neo6502 / Re: [SOLVED] USB Keyboard issu...

Last post by Jaypee - January 15, 2025, 10:18:52 AM

Thank you very much !
I am familiar with this kind of operations on MCUs, it should not be very different to my experience !
JP

#49

NXP / Re: iMX8MP - Typical Expected ...

Last post by LubOlimex - January 15, 2025, 09:11:29 AM

So the hardware problem is in the iMX8MP-SOM-4GB-IND and not in iMX8MP-SOM-EVB-IND? It is good idea to analyze how you damaged it, to avoid similar fate in future. Unfortunately, I don't see protection on the iMX8MP-SOM-4GB-IND, if it draws a lot of current probably the PMU got seriously damaged and it is hard to replace.

#50

A20 / Re: setup olimage via UART wit...

Last post by LubOlimex - January 15, 2025, 08:43:58 AM

Glad you found a solution but you can also use Olimage via SSH, it is described in chapter 6.4 (page 18) of the Olimage guide:

https://github.com/OLIMEX/OLINUXINO/blob/master/DOCUMENTS/OLIMAGE/Olimage-guide.pdf

If you have trouble it is good idea to look at our image, all hardware is well supported and all sources and changes available at our GitHub.