TheBackShed.com

Forum Index : Microcontroller and PC projects : PicoMiteVGA dead after set to 378MHz

Author

Message

Amnesie
Guru

Joined: 30/06/2020
Location: Germany
Posts: 763

Posted: 02:23pm 08 Mar 2023

Copy link to clipboard

Print this post

Hello,

after trying the latest version of picoMiteVGA (2023-03-07_001019_PicoMiteVGA)
everything worked fine, but right after setting

OPTION CPUSPEED 378000

the pico is dead, no blinkin onboard led and no connection via TeraTerm. I re-flashed the firmware to the official release on the geoff website and it is still dead.

And yes, I looked in the manual on page 10 which suggest to clear the flash, but the link in the manual is broken (https://geoffg.net/Downloads/picomite/Clear_Flash.uf2)

In the offical release on the geoff website is no clear flash firmware in the archieve...

Would anybody please provide me a link to it?

Greetings
Daniel

twofingers

Guru

Joined: 02/06/2014
Location: Germany
Posts: 1769

Posted: 02:28pm 08 Mar 2023

Copy link to clipboard

Print this post

Hi Daniel
2021-12-17_025627_Clear_flash.zip

Regards
Michael

‚My name is Ozymandias, king of kings
Look on my works, ye Mighty, and despair!‘
Nothing beside remains. Round the decay
Of that colossal wreck, boundless and bare
The lone and ...

Amnesie
Guru

Joined: 30/06/2020
Location: Germany
Posts: 763

Posted: 02:56pm 08 Mar 2023

Copy link to clipboard

Print this post

Thank you Michael, that worked.

This is the first pico on which 378Mhz is not working... Flashed about 6 or so.

Greetings
Daniel

Mixtel90

Guru

Joined: 05/10/2019
Location: United Kingdom
Posts: 9128

Posted: 03:01pm 08 Mar 2023

Copy link to clipboard

Print this post

It's *way* beyond specification for the RP2040. Don't be surprised if you get reliability issues at some point even if they appear to be working.

Mick

Zilog Inside! nascom.info for Nascom & Gemini

Amnesie
Guru

Joined: 30/06/2020
Location: Germany
Posts: 763

Posted: 03:10pm 08 Mar 2023

Copy link to clipboard

Print this post

Hello Mick!

You are right, I was not even expecting to go this far but since it worked on all my previous picos I thought: "why not?".

Now I rather stick to 252000 (this works on this very pico!). Even 252Mhz is a HUGE improvement to the standard cpu speed.

Greetings
Daniel

Plasmamac

Guru

Joined: 31/01/2019
Location: Germany
Posts: 620

Posted: 08:26pm 08 Mar 2023

Copy link to clipboard

Print this post

I flashed 4 picos and only one works with 378 MHZ. Sometimes

Plasma

Amnesie
Guru

Joined: 30/06/2020
Location: Germany
Posts: 763

Posted: 09:17pm 08 Mar 2023

Copy link to clipboard

Print this post

I was curious and tested all my available picos and came up with:

15 tested in total, two of them were not able to clock as high as 378Mhz but all of them took the 252Mhz.

So I think we should consider 378Mhz as a nice option if it works, but not think that things run perfect. I rather stick to 252Mhz :)

Greetings
Daniel
Edited 2023-03-09 07:20 by Amnesie

Print this page

To reply to this topic, you need to log in.