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by PeterO
Mon Mar 02, 2020 7:47 pm
Forum: Troubleshooting
Topic: Pi 4B boots great unless no HDMI
Replies: 6
Views: 242

Re: Pi 4B boots great unless no HDMI

Someone needs to look at that page layout. The "hdmi_timings= ....." line just before the "Timing / Purpose" table is about three screens wide !
PeterO
by PeterO
Mon Mar 02, 2020 6:27 pm
Forum: General discussion
Topic: Raspberry Pi 4B 2GB Price Drop - NOW $35
Replies: 46
Views: 3692

Re: Raspberry Pi 4B 2GB NOW $35 price drop !

I already have a 4GB version, just ordered the 2GB version today. And added a Pi3A+ for 24.99€ (27.21$) [I did kill my only Pi3A+ some months ago]. This kept shipping cost at same 4.99€ (5.43$) I would have to pay for the 2GB version alone. Both PIs arrived, I just tested them and all is fine (mem ...
by PeterO
Mon Mar 02, 2020 4:58 pm
Forum: Beginners
Topic: Full KMS OpenGL
Replies: 21
Views: 1497

Re: Full KMS OpenGL

Thanks for the detailed explanation. 8-) I assume that ultimately you will still be aiming at minimum differencies between the upstream kernel and the one shipped with Raspbian ? I currently have no desire to run anything "experimental" as I'm in the middle of a project and I don't want the platform...
by PeterO
Mon Mar 02, 2020 4:01 pm
Forum: General discussion
Topic: RPi4/4GB Freezes Frequently PLEASE help...
Replies: 15
Views: 1591

Re: RPi4/4GB Freezes Frequently PLEASE help...

When it freezes, is the green LED turned on ?
PeterO
by PeterO
Mon Mar 02, 2020 12:12 pm
Forum: Python
Topic: How to get the library GPU_FFT?
Replies: 4
Views: 296

Re: How to get the library GPU_FFT?

Can i use this library (GPU_FFT) to perform real time FFT? You might be able to, but as I wrote it may/may not work depending on which Pi you have and which GPU drivers you have installed. Currently on my Pi4 it fails.. pi@raspberrypi:/opt/vc/src/hello_pi/hello_fft $ ./hello_fft.bin 16 Unable to en...
by PeterO
Mon Mar 02, 2020 12:06 pm
Forum: Troubleshooting
Topic: Raspberry Pi....GPIO...........???
Replies: 8
Views: 491

Re: Raspberry Pi....GPIO...........???

braian wrote: ↑
Mon Mar 02, 2020 11:49 am
 There is an adapter that transforms the +/- 3.3V signals of the raspberry pi to +/- 12V, RS-232 standard.
Note:
Raspberry Pi outputs are 0v/+3v3 NOT -3.3v/+3.3v.
PeterO
by PeterO
Mon Mar 02, 2020 11:34 am
Forum: Python
Topic: How to get the library GPU_FFT?
Replies: 4
Views: 296

Re: How to get the library GPU_FFT?

Look in /opt/vc/src/hello_pi/hello_fft BUT It's pretty much un-maintained and doesn't work on PI4s. I don't know the relationship to which of the various (confusing) fake/full/legacy GPU drivers are in use. Last time I did any work with it my tests showed FFTW was just as fast and simpler to use and...
by PeterO
Mon Mar 02, 2020 10:01 am
Forum: Troubleshooting
Topic: rpi-eeprom-update on the Pi4 - unusual output?
Replies: 9
Views: 727

Re: rpi-eeprom-update on the Pi4 - unusual output?

It seems unlikely it should "beta" or "critical" ?

Can anyone explain what these mean and what it should say ?

PeterO
by PeterO
Mon Mar 02, 2020 9:58 am
Forum: General discussion
Topic: How to get rid of extra partition on usb drive?
Replies: 21
Views: 1001

Re: How to get rid of extra partition on usb drive?

I'm not sure what the fuss is about. These extra directories are really no different to the "lost+found" directory created in every ext(234) file system.

PeterO
by PeterO
Sun Mar 01, 2020 10:37 pm
Forum: General discussion
Topic: So, what's the big new thing for this year's Pi Day (8th anniversary) ?
Replies: 130
Views: 8938

Re: So, what's the big new thing for this year's Pi Day (8th anniversary) ?

W. H. Heydt wrote: ↑
Sun Mar 01, 2020 10:26 pm
PeterO wrote: ↑
Sun Mar 01, 2020 9:44 pm
 If you aren't an industrial or commercial user you should't worry about it !
...unless you specifically want a Pi4B1.
In which case you are out of luck and will have to spend the extra £0.00 for a Pi4B2 ! It's really not hard to understand the blog post.
PeterO
by PeterO
Sun Mar 01, 2020 9:44 pm
Forum: General discussion
Topic: So, what's the big new thing for this year's Pi Day (8th anniversary) ?
Replies: 130
Views: 8938

Re: So, what's the big new thing for this year's Pi Day (8th anniversary) ?

Imperf3kt wrote: ↑
Sun Mar 01, 2020 9:34 pm
 I'm not sure what any of it means.
I'm sure all the industrial and commercial users know who they are and do understand it.
If you aren't an industrial or commercial user you should't worry about it !
PeterO
by PeterO
Sun Mar 01, 2020 9:12 pm
Forum: Beginners
Topic: RPi fan with T-cobbler
Replies: 8
Views: 306

Re: RPi fan with T-cobbler

Thanks TL, it looks like they are located directly under the USB-C socket on the underside of the board.

Yes, I didn't think about soldering to the underside of the GPIO pins :roll:

PeterO
by PeterO
Sun Mar 01, 2020 8:47 pm
Forum: Beginners
Topic: Is it safe to build circuit after boot?
Replies: 16
Views: 1061

Re: Is it safe to build circuit after boot?

mahjongg wrote: ↑
Sun Mar 01, 2020 7:10 pm
 . Arduino's have older 5V technology,
Things have moved on since you last used an Arduino ;)
https://www.arduino.cc/en/products/compare
There are other boards like the Teensy that are 3V3/5V tollerant.
PeterO
by PeterO
Sun Mar 01, 2020 7:42 pm
Forum: Beginners
Topic: Communication over Cat5 to Microcontroller
Replies: 3
Views: 184

Re: Communication over Cat5 to Microcontroller

If your microcontroller is an Arduino,then there is an ethernet shield and libraries that support socket level programming using TCP/IP. https://store.arduino.cc/arduino-ethernet-shield-2 Even if you aren't using an Arduino there may be some useful hints in the library code. https://www.arduino.cc/e...
by PeterO
Sun Mar 01, 2020 4:49 pm
Forum: Beginners
Topic: RPi fan with T-cobbler
Replies: 8
Views: 306

Re: RPi fan with T-cobbler

Which Pi do you have ? Some of them have 5V test pads which make a convenient point to make soldered connections to the 5V and 0V lines. I've not seen any mention of them on Pi4 boards though. PeterO Ah, I just looked at your picture again and it says "4B" on the board ! Maybe someone else knows if ...
by PeterO
Sun Mar 01, 2020 4:45 pm
Forum: General discussion
Topic: So, what's the big new thing for this year's Pi Day (8th anniversary) ?
Replies: 130
Views: 8938

Re: So, what's the big new thing for this year's Pi Day (8th anniversary) ?

fruitoftheloom wrote: ↑
Sun Mar 01, 2020 4:27 pm
 Until someone from RPT states otherwise it is all speculation and conjecture.
Speculation, conjecture and buzz ! :lol:
PeterO
by PeterO
Sun Mar 01, 2020 4:27 pm
Forum: Beginners
Topic: RPi fan with T-cobbler
Replies: 8
Views: 306

Re: RPi fan with T-cobbler

You'll have to find an alternative place to connect the fan. Which pins did that two pin connector go onto originally ?
PeterO
by PeterO
Sun Mar 01, 2020 3:08 pm
Forum: Beginners
Topic: RPi fan with T-cobbler
Replies: 8
Views: 306

Re: RPi fan with T-cobbler

It will depend on where is the fan mounted and how it is connected so without pictures it's impossible to give any answer.
PeterO
by PeterO
Sun Mar 01, 2020 2:59 pm
Forum: General discussion
Topic: How to get rid of extra partition on usb drive?
Replies: 21
Views: 1001

Re: How to get rid of extra partition on usb drive?

We don't know what the downstream implications are. Of course, it is easy to give advice and for him to act on that advice to delete partitions. That's beside the point. No, that's exactly the point, that's what these forums are all about.People ask questions, others make informed suggestions, they...
by PeterO
Sun Mar 01, 2020 2:17 pm
Forum: General discussion
Topic: How to get rid of extra partition on usb drive?
Replies: 21
Views: 1001

Re: How to get rid of extra partition on usb drive?

GlowInTheDark wrote: ↑
Sun Mar 01, 2020 1:58 pm
 We'd need to know how that partition got there, where it came from, before we can advise you to try to remove it.
Since the advice given has allowed OP to successfully remove the partition (a few post back) your assertion is incorrect !
PeterO
by PeterO
Sun Mar 01, 2020 1:43 pm
Forum: Beginners
Topic: Is it safe to build circuit after boot?
Replies: 16
Views: 1061

Re: Is it safe to build circuit after boot?

Welcome to the forums Gustfu. In some respects the Arduino platform is better suited to making first steps with learning about electronics and interfacing. In my experience they are more robust (though I've witnessed Teensy's with badly soldered USB connectors that fall off the boards) and since the...
by PeterO
Sun Mar 01, 2020 8:04 am
Forum: Troubleshooting
Topic: rpi-eeprom-update on the Pi4 - unusual output?
Replies: 9
Views: 727

Re: rpi-eeprom-update on the Pi4 - unusual output?

It looks like a beta image was installed on that board at some point in the past but the /etc/default/rpi-eeprom-update is pointing at the 'critical' release folder instead pi@raspberrypi:/etc/default $ cat rpi-eeprom-update FIRMWARE_RELEASE_STATUS="critical" pi@raspberrypi:/etc/default $ So what s...
by PeterO
Sat Feb 29, 2020 8:06 pm
Forum: Beginners
Topic: Full KMS OpenGL
Replies: 21
Views: 1497

Re: Full KMS OpenGL

Very little. As I wrote 3 posts above, the patches for full kms were sent to the list on Monday. Almost all of the 5.5 patches are just to get the platform booted. But it's not clear from what you have written if "the patches for full kms [that] were sent to the list on Monday" were for 5.4 or 5.5....
by PeterO
Sat Feb 29, 2020 8:02 pm
Forum: Troubleshooting
Topic: rpi-eeprom-update on the Pi4 - unusual output?
Replies: 9
Views: 727

Re: rpi-eeprom-update on the Pi4 - unusual output?

I get the same output so I too would like to know if it is a problem , and if so how to fix it.
PeterO
by PeterO
Fri Feb 28, 2020 9:02 pm
Forum: Networking and servers
Topic: Problems adding a USB 3.0 SSD to PI4
Replies: 35
Views: 3759

Re: Problems adding a USB 3.0 SSD to PI4

emma1997 wrote: ↑
Fri Feb 28, 2020 8:52 pm
 Peter0,
Why are you replying to me when I haven't posted anything on this thread ? :roll:
PeterO

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