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The time now is Fri 06 Dec 2019, 07:50
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 Forum index » Taking the Puppy out for a walk » Announcements
New RaspberryPI - 4
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Lobster
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Joined: 04 May 2005
Posts: 15550
Location: Paradox Realm

PostPosted: Tue 02 Jul 2019, 14:32    Post subject: rpi 4 arrived  

It is here ... Hooray Cool

However won't be able to test and use for a few days - busy. Rolling Eyes

Anyone else ordered?

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Lobster
Official Crustacean


Joined: 04 May 2005
Posts: 15550
Location: Paradox Realm

PostPosted: Fri 05 Jul 2019, 04:45    Post subject:  

Very Happy
Back home and connected the rpi 4

No case yet but I plugged into the Rpi:

- Raspbian Buster on 32gig micro-card (already had this for the Rpi 3+)
- 5volt 3amp multi-national supply going to usb3 power supply on Pi (note there is no on off switch on the pi). Ordered this at the same time as the Rpi4
- HDMI to my LG HD TV/monitor to micro-HDMI for the Pi - they are labelled 0 and 1 - so 0 is the first ...
- Connected a USB hub to one of the USB 2 ports, in went mouse, keyboard and USB headphones
- Ethernet cable to router

Turned on power, booted straight in to GUI first time. Only had to change audio. Laughing

Rpi is a silent PC. It is Chihuahua (small and cute) and now it is fast ... Cool

Next:
- to update Buster (sudo apt-get upgrade) βœ…
- Get a Puppi wallpaper ... done βœ…
- Make a temp stand/case. I created a base/stand out of the rpi box, stuffed with corrugated cardboard from delivery box and three map pins πŸ“Œ
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Lobster
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Joined: 04 May 2005
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Location: Paradox Realm

PostPosted: Sun 07 Jul 2019, 01:07    Post subject:
Subject description: HDMI monitor setup
 

I have now set up the Rpi 4 for three different monitors. One failure, two successful.

Here is what I learned/reacquainted myself with:

- The Raspberry Pi uses a configuration file instead of the BIOS you would expect to find on a conventional PC. The system configuration parameters, which would traditionally be edited and stored using a BIOS, are stored instead in an editable text file named config.txt. This is read by the GPU before the ARM CPU and Linux are initialised.
https://www.raspberrypi.org/documentation/configuration/config-txt/
https://www.opentechguides.com/how-to/article/raspberry-pi/28/raspi-display-setting.html
- you must edit config.txt as root user. So sudo geany /boot/config.txt

Forgetting all that meant I could relatively easily get all three monitors working now.
Still gonna do some tweaking ... Very Happy

In other efforts: I had a faulty external USB hub, I believe USB 2 will plug into USB 3 and is backward compatible. So that is the better option. Mouse and keyboard into USB 2 and USB 3 for my headphone and mic.

My Base made of the raspberry pi box, is not sturdy enough πŸ™„ better to use an off-cut of soft pine ...

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Last edited by Lobster on Sat 13 Jul 2019, 00:44; edited 1 time in total
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Sage

Joined: 04 Oct 2005
Posts: 5501
Location: GB

PostPosted: Sun 07 Jul 2019, 02:28    Post subject:  

Quote:
off-cut of soft pine

Water content varies according atmospheric partial pressure. Use a piece of discarded kitchen cabinet - the melamine coating is impervious and highly insulating. Enough in the average skip to setup a production line. Glue a pirated small micro-switch onto the side as a reset button [ v3 uses the 'RUN' thro-hole, presume it's the same on v.4] Of course, can still power via the GPIO bus from a proper PSU if not using an header across all pins, and observing appropriate precautions discussed previously.
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Lobster
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Joined: 04 May 2005
Posts: 15550
Location: Paradox Realm

PostPosted: Sun 07 Jul 2019, 08:06    Post subject:  

thanks @Sage

Good advice ... makes perfect sense Cool

Just noticed there are drink coasters all over the place here ...
so might use that for now πŸ‘πŸ»πŸ¦ž

Update: cork coasters were too thin ...

I also seemed to have messed up the display by editing boot/config.txt
No display ...

Time for a break Shocked

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don570


Joined: 10 Mar 2010
Posts: 5384
Location: Ontario

PostPosted: Tue 09 Jul 2019, 15:20    Post subject: Raspberry Pi charging port  

https://arstechnica.com/gadgets/2019/07/raspberry-pi-4-uses-incorrect-usb-c-design-wont-work-with-some-chargers/
Quote:
We reached out to Raspberry Pi about this issue and were told a board revision with a spec-compliant charging port should be out sometime in the "next few months."

____________________________________________

Last edited by don570 on Tue 09 Jul 2019, 15:23; edited 1 time in total
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don570


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PostPosted: Tue 09 Jul 2019, 15:20    Post subject:  

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Lobster
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PostPosted: Wed 10 Jul 2019, 00:27    Post subject:  

My charger was bought specifically for the Rpi 4, so is OK Cool

I am away from my geek-cave and can not access the config.txt
with the tools I presently have ... for another week. Crying or Very sad

New batch of Rpi 4 boards should now be available? Cool

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Sage

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PostPosted: Wed 10 Jul 2019, 03:17    Post subject:  

Never liked the mini USB power-in sockets, nor the USB-C (for any purpose), nor brick-chargers, generally - for any purpose. Experience tells they can be unreliable and short-lived (where's the fan cooling?!). Input power from a proper PSU, either via the GPIO (note previous precautions) or a proper power input socket, notwithstanding some ancillary protection devices, resistive or active the better option.
Although, no excuse for designers not reading the full spec!
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Lobster
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PostPosted: Sat 13 Jul 2019, 00:41    Post subject:  

> I also seemed to have messed up the display by editing boot/config.txt
> No display ...

With access to a puppy powered computer, was able to edit the 'bios' settings of boot/config.txt.

To cut costs, the Rpi does not have a clock, bios and the passive cooling (which is now improved) releases heat via the ports. Some nifty passive cooling. My Rpi 3 had a passive cooler for the CPU. All Rpi save money by not having an on/off switch.

I was able to update to the latest release version Raspbian Buster by following the online support.

The USB 3 charger situation was quickly disclosed by the Raspberry Pi Foundation.

I hope to run Puppi Rasvuan on my Rpi 3+ as a backup Puppy Powered arm device ...
http://www.murga-linux.com/puppy/viewtopic.php?p=1031631#1031631

Puppy runs on ARM! We are the Dorge.
Resistance is irrelevant! Embarassed


πŸ˜‰πŸ¦ž

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Sage

Joined: 04 Oct 2005
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PostPosted: Sat 13 Jul 2019, 02:17    Post subject:  

Quote:
Rpi does not have a clock, ... the passive cooling ... not having an on/off switch.

There is an RTC add-on, can buy a bag of finned ali HS for a few bob from China, on/off can be mounted externally on your piece of board alongside the reset microswitch (liberate one from your mountains of dead PC parts).
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Lobster
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PostPosted: Sat 13 Jul 2019, 07:47    Post subject:  

Thanks @Sage

The updated Raspbian Buster runs the Rpi cooler.
Puppy/Puppi will be even cooler hopefully ...

However a Heat Sink may be available by the time Rpi 4 cases become numerous and I might order both ...

The switch Is really useful/convenient. Some earlier cases had them built it but I think your tinkering suggestion will be worth following ... Very Happy

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8Geee


Joined: 12 May 2008
Posts: 2095
Location: N.E. USA

PostPosted: Sat 13 Jul 2019, 14:31    Post subject:  

Just curious there Lobstah... That ARM MPU... was there any microcode updates applied? Do you have to "DIY"?

ARM Cortex A72 Of note is the first bullet in the OVERVIEW SECTION

Quote:
Pipelined processor with deeply out of order, speculative issue 3-way superscalar execution pipeline


Ye Olde Cortex A7 did not have this issue, and promptly got "upgraded", with ye olde Broadcom chip removed from market.

Regards
8Geee

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Lobster
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PostPosted: Sat 13 Jul 2019, 15:46    Post subject:  

Quite easy Debian style upgrade from the command line @8Geee

Quote:
Type the following commands in the terminal, one after the other, waiting for them to complete at each step:

sudo apt update -y
sudo apt-get upgrade
sudo reboot

The thing about the RPi is the amount of info, documentation and support.
A lot of the help is designed for kids ... so simple enough for an idiot crustacean Embarassed

It is not rocket science ... but it can be ...
https://www.raspberrypi.org/blog/nasa-raspberry-pi-and-a-mini-rover/ Cool

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8Geee


Joined: 12 May 2008
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PostPosted: Sat 13 Jul 2019, 22:10    Post subject:  

and an idiot savant like me. Laughing

I did model rockets when I was 11-14 y.o. NEAT stuff. Never got good enuff to hang with the big boys, tho. One thing I did was stuff an extra chute with plastic soldier. Lost several of the troops. Embarassed High altitude launches have its problems with even a mild breeze.

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