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by hippy
Fri Jul 19, 2019 11:17 am
Forum: Off topic discussion
Topic: Forum page update
Replies: 7
Views: 217

Re: Forum page update

It comes and goes for me. I put it down to "internet speed", okay when things are fast, like that when things are running a little slow. That could be down to the hosting site, caching, one's ISP, their caching, the backbone, local link, or even own local network.
by hippy
Fri Jul 19, 2019 10:49 am
Forum: Off topic discussion
Topic: Forum page update
Replies: 7
Views: 217

Re: Forum page update

I get that quite often and not just with this site. My guess is the browser gets most of the page, and renders what it has, before rendering it as it should be, is probably doing 'post download rearrangement'. I think what happens is the browser is getting the page content then stalling on downloadi...
by hippy
Fri Jul 19, 2019 9:25 am
Forum: General discussion
Topic: Power Supply - Type C of Pi 4 model B
Replies: 14
Views: 663

Re: Power Supply - Type C of Pi 4 model B

Step three: Identify which of the dozens of wires inside are 5v, ground and possibly D+, D- if you plan to use gadget mode. Step five: fail miserably and just take the previous, more sane advice - power the Pi via the GPIO header, 5v pin/s and ground If one takes a USB-A to USB-C cable there will o...
by hippy
Thu Jul 18, 2019 2:52 pm
Forum: General discussion
Topic: 32bits Linux OS on Raspberry Pi 3 B+
Replies: 9
Views: 259

Re: 32bits Linux OS on Raspberry Pi 3 B+

Yes exactly I want to run i386 32 bit software on it, How can I run i386 32 bit software on it can you tell me or is there any easy way to do that? QEMU can do that, run some Linux i386 executables 'as is'. But whether it will run yours, or be responsive enough, I have no idea. The best way forward...
by hippy
Thu Jul 18, 2019 12:25 pm
Forum: Off topic discussion
Topic: 1TB microSD Card is real!
Replies: 16
Views: 445

Re: 1TB microSD Card is real!

Interesting. I have yet to find a use for more than a third of a 64GB card (still 40GB free), so may be a bit before that finds a use here. I'm happy to accept 64GB should be enough for most people. Mind you I probably said that about 32GB, 16GB, 8GB, and 4GB as well. It is mostly media which requi...
by hippy
Thu Jul 18, 2019 12:07 pm
Forum: Off topic discussion
Topic: Something I'd like to see.
Replies: 17
Views: 512

Re: Something I'd like to see.

A decent and capable USB to SATA bridge would probably be of most benefit to people. Of course, but is it something the raspberry pi foundation should be focusing on? It would seem to fit Eben's willingness to step in where "the items being built didn't get it right". To me it would be similar to h...
by hippy
Thu Jul 18, 2019 11:22 am
Forum: Advanced users
Topic: UART communication between Pis
Replies: 15
Views: 371

Re: UART communication between Pis

/dev/serial0, /dev/serial1, /dev/ttyS0 and /dev/ttyAMA0 all appear to be there. You appear to be logged in as the default "pi" user. So it's not clear to me why you are getting "permission denied" errors. You could run the following commands and report back what you get - uname -a groups ls -l /dev/...
by hippy
Thu Jul 18, 2019 10:32 am
Forum: Advanced users
Topic: Updated bootloader for Pi4
Replies: 13
Views: 580

Re: Updated bootloader for Pi4

Conceptually it's the same as the bootcode in the Pi3 ROM, it's just possible to fix stuff after manufacture Absolutely and it's a great idea. On the downside it's a potentially new attack vector which could be exploited by anyone who had malicious intent. Such malicious attacks are unlikely but it...
by hippy
Thu Jul 18, 2019 12:44 am
Forum: Off topic discussion
Topic: Something I'd like to see.
Replies: 17
Views: 512

Re: Something I'd like to see.

A decent and capable USB to SATA bridge would probably be of most benefit to people.
by hippy
Wed Jul 17, 2019 9:50 pm
Forum: Advanced users
Topic: Updated bootloader for Pi4
Replies: 13
Views: 580

Re: Updated bootloader for Pi4

If you reflash your bootrom 100k times, you are doing something wrong. Or something else is. I was idly wondering how quickly one could brick someone else's Pi for them - not that I have any intention of doing so. About an hour I reckon. Though erase-cycles are often conservatively stated so it cou...
by hippy
Wed Jul 17, 2019 8:37 pm
Forum: Advanced users
Topic: Updated bootloader for Pi4
Replies: 13
Views: 580

Re: Updated bootloader for Pi4

Once again - Thanks.
by hippy
Wed Jul 17, 2019 8:15 pm
Forum: Advanced users
Topic: Updated bootloader for Pi4
Replies: 13
Views: 580

Re: Updated bootloader for Pi4

The sd-card rescue image will always work and also always resets any config i.e. it's a factory reset of the EEPROM. The ROM always runs recovery.bin on the sd-card in preference to the EEPROM so this will always be safe. The 'safe mode' / minimal bootloader (could do with a better name) is just en...
by hippy
Wed Jul 17, 2019 7:40 pm
Forum: Advanced users
Topic: Updated bootloader for Pi4
Replies: 13
Views: 580

Re: Updated bootloader for Pi4

There's a 'safe mode' recovery which will allow basic booting from sd-card to allow for a transaction but that's not ready just yet. Is rescuing oneself from an erased / corrupted Bootloader Eeprom not covered by booting an SD Card with the SPI Bootloader Eeprom Recovery files on it ? https://www.r...
by hippy
Wed Jul 17, 2019 2:10 pm
Forum: General discussion
Topic: When are people in the U.S. getting their Pi 4s?
Replies: 108
Views: 3989

Re: When are people in the U.S. getting their Pi 4s?

4GB is probably overkill, but it will allow for expected growth. That's how I believe most people think. 1GB is possibly not enough, 2GB is probably enough, but I might one day need 4GB. Is the extra $10 worth it to have 4GB in case I might find that beneficial in future ? That extra 2GB might neve...
by hippy
Wed Jul 17, 2019 1:35 pm
Forum: Beginners
Topic: Timed loop?
Replies: 25
Views: 454

Re: Timed loop?

I would probably use threads to control the motor and strobe. For example this will do nothing for 5 seconds, then turn the motors on, two seconds later turn the strobe on, have both on for 5 seconds, turn the strobe off, then two seconds later turn the motor off - #!/bin/usr/python import threading...
by hippy
Wed Jul 17, 2019 1:05 pm
Forum: RISCOS
Topic: Proposal to show speed of RISC OS compared to Linux.
Replies: 59
Views: 1575

Re: Proposal to show speed of RISC OS compared to Linux.

You know I am going to put this thread down to a lesson learned. I should have just written the code for the initial set of tests in RISC OS, provided the skeloton as well for people to port to other ARM based OS's, and seen what the responce was. That is usually best in my experience. The more you...
by hippy
Wed Jul 17, 2019 12:38 pm
Forum: Python
Topic: only read a certain length of a output
Replies: 9
Views: 174

Re: only read a certain length of a output

def callback(bits, value): print("bits={} value={}".format(bits, value)) Given that reports, "bits=89 value=321749267849309967093760" it would seem that you could grab the card ID into a variable simply by using - def callback(bits, value): print("bits={} value={}".format(bits, value)) cardId = str...
by hippy
Wed Jul 17, 2019 10:17 am
Forum: General discussion
Topic: Experimental Windows 10 UI transformation package - testers wanted!
Replies: 7
Views: 520

Re: Experimental Windows 10 UI transformation package - testers wanted!

Any other suggestions? Specifically I have noticed the relative lack of attention to this topic and am wondering if there is a better place to put this transformation pack. Gnome-look.org? GitHub? Could be that people thought "sounds great" but didn't post just that. I note the actual image of the ...
by hippy
Tue Jul 16, 2019 5:46 pm
Forum: Advanced users
Topic: UART communication between Pis
Replies: 15
Views: 371

Re: UART communication between Pis

When im using serial0, it gives me could not open serial0. What does "ls /dev/serial*" report ? If /dev/serial0 is not there then it won't be able to open it. Then i run this code with sudo, and again code doing nothing. Then i tried with ttyAMA0 and again does nothinh Does nothing or gives an erro...
by hippy
Tue Jul 16, 2019 2:45 pm
Forum: General discussion
Topic: Pi 3 B+ stopped working
Replies: 5
Views: 156

Re: Pi 3 B+ stopped working

With everything disconnected from the GPIO header, power the Pi with 5V and check the 3V3 pin on the GPIO header. If the red LED is on but you do not see close to 3V3 you have a dead Pi, the PMIC has likely failed.
by hippy
Tue Jul 16, 2019 2:38 pm
Forum: Advanced users
Topic: UART communication between Pis
Replies: 15
Views: 371

Re: UART communication between Pis

One is Pi4 one is Pi3B+, im using TXD0 RXD0 TXD0 RXD0 I am not familiar with the Pi 4B and its UART configurations. There may be additional things you need to do to get those working or changes which I am unaware of. I would suggest using two pre-4B's to get things working with "/dev/serial0" so yo...
by hippy
Tue Jul 16, 2019 2:08 pm
Forum: Advanced users
Topic: UART communication between Pis
Replies: 15
Views: 371

Re: UART communication between Pis

This codes doing nothing. Maybe try "/dev/serial0" as suggested, or tell us which Pi model you are using so what else it should be can be determined. I would also start with simpler code and slower baud rates, something like, untested .. import serial import time transmitter = serial.Serial("/dev/s...
by hippy
Tue Jul 16, 2019 1:32 pm
Forum: Advanced users
Topic: UART communication between Pis
Replies: 15
Views: 371

Re: UART communication between Pis

I believe it should be "/dev/serial0" for both sides. That will select the UART which is routed to GPIO pins 14 and 15 regardless of PI model and which UART is actually routed to those - /dev/AMA0 or /dev/ttyS0 otherwise. You can use "ls -l /dev/serial*" to determine how things are routed on a parti...
by hippy
Tue Jul 16, 2019 12:18 pm
Forum: C/C++
Topic: I dont get it... Why is everyone from science schools so obsessed with Perl and Python when we got C?
Replies: 186
Views: 4437

Re: I dont get it... Why is everyone from science schools so obsessed with Perl and Python when we got C?

hippy, I cannot recall exactly what had me thinking Python did not have pointers... But you were right the first time. The Python language does not have pointers. The code you posted there looks very similar to my previous Javascript example. Javascript does not have pointers either. They do have n...
by hippy
Tue Jul 16, 2019 11:41 am
Forum: General discussion
Topic: I didn't think the usb c power thing was a big deal...
Replies: 92
Views: 4005

Re: I didn't think the usb c power thing was a big deal...

Some cables that don't work - Apple Macbook charger - cost £90, plus £20 for a cable. My Dell laptop dock - $209. I suspect anyone who paid that much for something just to power their Pi needs their faculties testing. But it's not unreasonable for people who already have one to moan when it doesn't...

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