Raspberry Pi 4

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05 Nov 2019 15:04 #149603 by Chris D
Replied by Chris D on topic Raspberry Pi 4
Good luck Gene - wishing you the best while in the "shop"

Chris

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05 Nov 2019 20:23 #149647 by Gene1934
Replied by Gene1934 on topic Raspberry Pi 4
unforch, I had to drive 3 hours round trip just to talk to them. Enough to upset the pope. Absolutely everything we talked about, except putting my Freddy McGilicuddy on two pieces of paper, could have been done over the phone by on of the Dr's girls.

According to the dyed cat scans, my blood vessels are a bit tight to allow the device to be implanted thru the groin, so thursday they will install a stent or 3 to stretch them out. But that will require a driver because the twilight shot doesn't wear off fast enough to let me drive myself home.

Then they'll schedule installing the new valve. Another weeks delay, or more. Grrrrr.

And thats all I know.

Take care all.

Cheers, Gene Heskett

Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page < geneslinuxbox.net:6309/gene >

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06 Nov 2019 04:48 - 06 Nov 2019 05:37 #149671 by RyanG
Replied by RyanG on topic Raspberry Pi 4
Spacehitchhiker42

Did you etch the image to the SD card? I tried balenaEtcher but it gives me an error because the file extension isn't supported. Do I need to try a different etcher? I have tried removing the extension and installing but I get the 4 flashes of the green light which means the start*.elf isn't found. I tried reformatting the sd card and then copying the .tar.gz file and still not working. What am I doing wrong?
Last edit: 06 Nov 2019 05:37 by RyanG.

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08 Nov 2019 23:36 #149948 by RyanG
Replied by RyanG on topic Raspberry Pi 4

RyanG wrote: Spacehitchhiker42

Did you etch the image to the SD card? I tried balenaEtcher but it gives me an error because the file extension isn't supported. Do I need to try a different etcher? I have tried removing the extension and installing but I get the 4 flashes of the green light which means the start*.elf isn't found. I tried reformatting the sd card and then copying the .tar.gz file and still not working. What am I doing wrong?



I got it all figured out, but when I was looking at the GPIO Hal I noticed the pin assignments says they are for the Pi 2/3. Are the GPIO pins for the Pi4 the same as 2/3?

One other question, Has anyone been able to clock the Pi to run it faster. When I tried to do it I got an error stating that it couldn't be done with the image that I got from Spacehitchhiker42. I tried it from the boot sequence when pressing Shift during the boot process. Is there a way to do it through the terminal?

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09 Nov 2019 00:01 #149949 by andypugh
Replied by andypugh on topic Raspberry Pi 4

RyanG wrote:

RyanG wrote: I got it all figured out, but when I was looking at the GPIO Hal I noticed the pin assignments says they are for the Pi 2/3. Are the GPIO pins for the Pi4 the same as 2/3?


Yes.

But be aware the HAL driver uses physical pin numbers, not GPIO numbers.

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09 Nov 2019 00:12 #149950 by RyanG
Replied by RyanG on topic Raspberry Pi 4

andypugh wrote:

RyanG wrote:

RyanG wrote: I got it all figured out, but when I was looking at the GPIO Hal I noticed the pin assignments says they are for the Pi 2/3. Are the GPIO pins for the Pi4 the same as 2/3?


Yes.

But be aware the HAL driver uses physical pin numbers, not GPIO numbers.


Okay thank you!

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11 Nov 2019 04:06 #150082 by Gene1934
Replied by Gene1934 on topic Raspberry Pi 4
This isn't for RyanG in particular, but its for whomever is actually downloading the rpi4-pre-empt-rt.tgz kernel file from my site at geneslinuxbox.net this evening of 11/10/19.. This is a built kernel but please follow John Thorntens recipe to install it on a pi4's sd card. You only need a few megs of it for a realtime kernel install. Its not built for arm64, but for armhf, which you get from installing the raspbian version of debian 10.1. Its running my big sheldon lathe very well, much easier than the rpi3 I took out. IMO armhf should have a smaller stack frame making context switches faster.

You could rebuild it for arm64, and install it on debian 10.1, but I don't think you'll quite get the latency I'm getting. In any event, have fun. And let me know if you hit any problems. The debs for a linuxcnc install are also armhf flavor.

Be aware that I am blocking the bots as they show up.

Cheers All, Gene Heskett.

Cheers, Gene Heskett
--
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page < geneslinuxbox.net:6309/gene >
The following user(s) said Thank You: snoozer77

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