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by ghans
Sat Oct 20, 2018 4:18 pm
Forum: Media centres
Topic: high power installation projector
Replies: 1
Views: 52

Re: high power installation projector

As long as the projector has HDMI input, it should just work.
omxplayer supports full HD, but not more.

ghans
by ghans
Mon Oct 15, 2018 3:14 pm
Forum: Troubleshooting
Topic: Worst web surfing experience with Strecht
Replies: 20
Views: 577

Re: Worst web surfing experience with Strecht

Ethernet is actually connected via USB (internally) on all Raspberry Pis.
So if you copy things from a pendrive over network onto another computer, both times USB is used, cutting throughput in half (in truth it is even worse, but those bottlenecks also exist on "normal" computers).

ghans
by ghans
Sat Sep 29, 2018 1:55 pm
Forum: Other programming languages
Topic: PHP & Serial comm with RPi?
Replies: 13
Views: 733

Re: PHP & Serial comm with RPi?

Make the Arduino output much more debug messages (say 5-7 per second) and filter all those debug messages with JavaScript.

ghans
by ghans
Wed Sep 26, 2018 2:34 pm
Forum: Bare metal, Assembly language
Topic: Building a network stack
Replies: 12
Views: 469

Re: Building a network stack

The USB controller on the Pi has no openly available documentation. Everybody has had to reverse-engineer it using existing drivers (the first ones had to use the Linux one ... several thousand lines of it). Synopsys considers Broadcom and only Broadcom as its customer, not Raspberry Pi, much less n...
by ghans
Tue Sep 25, 2018 4:42 pm
Forum: Advanced users
Topic: Diskless booting Zeroes from Windows
Replies: 77
Views: 2380

Re: Diskless booting Zeroes from Windows

No, the Pi Zero can boot as "USB client" while an USB host runs the "rpiboot" tool. Both devices must be physically connected via USB and a special bootcode.bin and start.elf are sent over the wire with the "rpiboot" tool to boot the Pi. @hippy Why don't you add fixup.dat to the files in to be sent ...
by ghans
Tue Sep 25, 2018 9:53 am
Forum: Troubleshooting
Topic: eSpeak Problems
Replies: 20
Views: 717

Re: eSpeak Problems

Firware in the context of the Raspberry Pi means start.elf/bootcode.bin, which are unrelated to the 30,000 or so packages in Raspbian. Incidentally, the firmware itself has been packaged and by staying on Jessie you will indeed not recieve firmware upgrades.

ghans
by ghans
Sun Sep 23, 2018 3:23 pm
Forum: Raspbian
Topic: Firefox 60.2
Replies: 8
Views: 647

Re: Firefox 60.2

If you are the owner of a Raspberry Pi 2 or Raspberry Pi 3 you can switch to "pure" Debian today. Raspbian focuses on ARMv6, a CPU architecture Debian and Mozilla consider obsolete and probably extremely low-priority.

ghans
by ghans
Sun Sep 23, 2018 7:31 am
Forum: Other programming languages
Topic: PHP & Serial comm with RPi?
Replies: 13
Views: 733

Re: PHP & Serial comm with RPi?

1) All the programs i mentioned should aid you in debugging serial comms. Since you seem unfamiliar with Linux, GTKTerm or PuTTY might be the better choice instead of the other two options. 2) The "MODE" command does not exist on Linux. 3) You should put the endless loops into your JavaScript instea...
by ghans
Fri Sep 21, 2018 7:29 am
Forum: Other programming languages
Topic: PHP & Serial comm with RPi?
Replies: 13
Views: 733

Re: PHP & Serial comm with RPi?

Linux follows the "everything is a file" motto of Unix. As soon you plug an Arduino into the Raspberry, a file should magically appear in /dev. This file represents a serial port and can be read and written to. The handling has not changed in the last 40 years so software like screen and minicom sho...
by ghans
Tue Sep 18, 2018 6:40 pm
Forum: Beginners
Topic: Watching a DVD under Raspian Stretch, how?
Replies: 9
Views: 301

Re: Watching a DVD under Raspian Stretch, how?

The point of Blu-Ray was to introduce copy-protection which cannot be cracked by just dumping the keys of a Windows player and turning it into Linux software ;) AFAIK 22 AACS keys have been leaked and subsequently revoked. Further keys are even kept secret by those who write Blu-Ray ripping software...
by ghans
Mon Sep 17, 2018 1:18 pm
Forum: Python
Topic: os.path to network pc
Replies: 13
Views: 396

Re: os.path to network pc

If your server is running CentOS instead of Windows, you still need to configure network share acess on the Raspberry Pi once. Only then you can check if the connection is working. Furthermore, you need to install file server sofware on CentOS . For Windows File Sharing the software is called "Samba...
by ghans
Mon Sep 17, 2018 12:18 pm
Forum: Python
Topic: os.path to network pc
Replies: 13
Views: 396

Re: os.path to network pc

The files you want to access are stored on a CentOS machine ?

ghans
by ghans
Mon Sep 17, 2018 12:05 pm
Forum: Python
Topic: os.path to network pc
Replies: 13
Views: 396

Re: os.path to network pc

This simply doesn't work on Linux. Before trying to open, read, write and close files from Windows network shares inside a program, you need to explicitly configure them for the whole system. After doing that once, they will be automatically mounted and dismounted on demand within milliseconds. This...
by ghans
Sat Sep 15, 2018 7:05 am
Forum: Troubleshooting
Topic: eSpeak Problems
Replies: 20
Views: 717

Re: eSpeak Problems

You are missing hyphens (-).

ghans
by ghans
Sat Sep 15, 2018 5:53 am
Forum: Other programming languages
Topic: launching C# code
Replies: 13
Views: 694

Re: launching code

If your program is written in C# instead of C or C++ recompilation might not be necessary.

Just like Java, the .NET program should run as-is on the Raspberry Pi. Instead of a Java Virtual Machine (JVM) "Mono" has to be installed on Raspbian for .NET programs to work.

ghans
by ghans
Sun Sep 09, 2018 9:11 am
Forum: Beginners
Topic: Shutdown at command level
Replies: 8
Views: 314

Re: Shutdown at command level

Programs on Linux have default signal handlers. The Python interpreter is a program too ! Of course, Python being a full-fledged programming language allows you to override the default signal handlers inside your own program itself. If you want to it "correctly", overriding the SIGTERM handler of yo...
by ghans
Fri Sep 07, 2018 4:22 pm
Forum: General discussion
Topic: SD card in another computer
Replies: 5
Views: 216

Re: SD card in another computer

I have never heard of consumer SD cards supporting TRIM at all. TRIM is only a thing on "proper" SSDs.

ghans
by ghans
Tue Aug 28, 2018 10:40 am
Forum: Networking and servers
Topic: How does mount.cifs transfer data from RAM
Replies: 3
Views: 158

Re: How does mount.cifs transfer data from RAM

A good keyword for Google is "Linux VFS".

ghans
by ghans
Sat Aug 25, 2018 7:29 am
Forum: Troubleshooting
Topic: How to set display brightness on the Raspberry Pi?
Replies: 6
Views: 335

Re: How to set display brightness on the Raspberry Pi?

The only person who could answer this question is probably Eric Anholt or someone who is working with him directly. His/their work is what made the "xgamma" tool work on the Pi in the first place.

ghans

PS: The Wikipedia page of DDC/CI says that it not only works over VGA, but HDMI too.
by ghans
Fri Aug 24, 2018 7:01 am
Forum: Advanced users
Topic: Creating an extremly reliable Actioncam with a PiZero
Replies: 5
Views: 233

Re: Creating an extremly reliable Actioncam with a PiZero

You want a extremely reliable actioncam but want to use a Pi Zero (for 10 $) ... you do realise that Raspberry Pi UPS systems exist already ? Check their prices and tell me if you can fit it into your budget ... something tells me you'd rather buy a chinese GoPro knockoff .... lol. By all means do s...
by ghans
Fri Aug 24, 2018 4:11 am
Forum: General discussion
Topic: Is it really true, that the RPi runs faster when booting from a good USB Stick?
Replies: 31
Views: 1301

Re: Is it really true, that the RPi runs faster when booting from a good USB Stick?

I though this has to do with the fact that SSDs and rotating harddisks have much better random I/O performance ?

ghans
by ghans
Tue Aug 21, 2018 4:48 am
Forum: Beginners
Topic: downloading stuff using Linux?
Replies: 3
Views: 221

Re: downloading stuff using Linux?

Most random "Linux" download pages will never work on the Pi. Only download when the software authors explictly mention Raspberry Pi.

ghans
by ghans
Mon Aug 20, 2018 4:39 am
Forum: Beginners
Topic: Updating audio drivers for 3.5 jack
Replies: 7
Views: 213

Re: Updating audio drivers for 3.5 jack

The audio driver on the Pi has been improved several times over the years. Some of the improvements are actually inside the firmware (start.elf) instead of the Linux kernel. Updating the firmware (and the Linux kernel) is usally done with the "apt-get" command nowadays. Sadly LibreELEC is notorious ...
by ghans
Wed Aug 15, 2018 4:53 pm
Forum: Networking and servers
Topic: scp transfer of .PNG photos---something doesn't work
Replies: 14
Views: 357

Re: scp transfer of .PNG photos---something doesn't work

Windows tries to infer filetype from the file extension, which works most of the time.
Linux does not honor filename extension but uses "magic" (signatures inside the file).

ghans

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