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by Pihkal
Tue Nov 05, 2013 1:42 pm
Forum: Advanced users
Topic: core_freq overclock and SD-card corruption.
Replies: 20
Views: 13269

Re: core_freq overclock and SD-card corruption.

100mb nic = 100 megabit/second network interface card, this means the theoretical maximum network throughput is limited to roughly 12 megabyte per second, which is slower then most sdcards are. Also keep in mind the nic and usb controller share the same bus so data that comes from usb devices can sl...
by Pihkal
Tue Nov 05, 2013 11:42 am
Forum: Advanced users
Topic: core_freq overclock and SD-card corruption.
Replies: 20
Views: 13269

Re: core_freq overclock and SD-card corruption.

I moved away from an sdcard rootfs.
The rootfs now lives on an nfs-share.
Didn't have any corruption for the past 3 months, even with multiple crashes due to high overclocks.
Downside to this is the 100mb nic the pi uses but I can live with that.
At least it boots every single time.

Regards
by Pihkal
Sat Jan 05, 2013 2:36 pm
Forum: Advanced users
Topic: MPEG 2 License Not Working (solved)
Replies: 20
Views: 24015

Re: MPEG 2 License Not Working

It's the latest (stable) release of Xbian version 1.0a4 . Vcgencmd: root@xbian:~# vcgencmd version Oct 19 2012 23:40:40 Copyright (c) 2012 Broadcom version 345130 (release) It's indeed outdated. So i've tried to update with rpi-update: root@xbian:~# rpi-update -bash: rpi-update: command not found It...
by Pihkal
Sat Jan 05, 2013 1:21 pm
Forum: Advanced users
Topic: MPEG 2 License Not Working (solved)
Replies: 20
Views: 24015

Re: MPEG 2 License Not Working

I appear to have the same problem. root@xbian:~# vcgencmd codec_enabled mpg2 mpg2=disabled Then strangly this command doesn't work: root@xbian:~# vcgencmd get_config str error=1 error_msg="Command not registered" My cpu info: root@xbian:~# cat /proc/cpuinfo Processor : ARMv6-compatible processor rev...
by Pihkal
Fri Jan 04, 2013 5:07 pm
Forum: Media centres
Topic: XBian - Small, Fast, Lightweight XBMC solution
Replies: 612
Views: 232365

Re: XBian - Small, Fast, Lightweight XBMC solution

You're welcome.
Glad to help.
by Pihkal
Fri Jan 04, 2013 2:44 pm
Forum: Media centres
Topic: XBian - Small, Fast, Lightweight XBMC solution
Replies: 612
Views: 232365

Re: XBian - Small, Fast, Lightweight XBMC solution

This is a known and fixed issue. From the bugfix-thread on the Xbian-forums: ( http://forum.xbian.org/thread-168-post-1498.html#pid1498 ) #2 - Incorrect permission on sources.xml Symptoms: XBMC not saving media sources. Fix: SSH in and execute these commands: sudo /etc/init.d/xbmc stop #default pass...
by Pihkal
Fri Jan 04, 2013 1:47 pm
Forum: Media centres
Topic: XBian - Small, Fast, Lightweight XBMC solution
Replies: 612
Views: 232365

Re: XBian - Small, Fast, Lightweight XBMC solution

Hello, I'm having some problems with Xbian 1.0 alpha 4. If I want to add a subtitle on a movie, I can't do it. Basically I'm going to the icon for subtitles, I can see that there are no subs provider yet, so I try to add some, but the application just close herself... any suggestion? Then sometimes...
by Pihkal
Mon Dec 31, 2012 3:05 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO lowest input voltage that still reads logic high.
Replies: 23
Views: 6966

Re: GPIO lowest input voltage that still reads logic high.

Oooh,that's something completely different.
Sorry,still good luck.
by Pihkal
Mon Dec 31, 2012 2:51 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO lowest input voltage that still reads logic high.
Replies: 23
Views: 6966

Re: GPIO lowest input voltage that still reads logic high.

The easiest way would be to just install LIRC and try your remote with it. LIRC autodetects the protocol etc used by the remote. Take a look here http://forum.stmlabs.com/showthread.php?tid=1954 ,allthough this is written for use with xbmc it could be used for general configuration of LIRC. Good luck.
by Pihkal
Mon Dec 31, 2012 2:36 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO lowest input voltage that still reads logic high.
Replies: 23
Views: 6966

Re: GPIO lowest input voltage that still reads logic high.

LIRC,it works great.

http://www.lirc.org/

I'm using an old VCR remote,it transmits RC5 code.
by Pihkal
Mon Dec 31, 2012 2:30 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO lowest input voltage that still reads logic high.
Replies: 23
Views: 6966

Re: GPIO lowest input voltage that still reads logic high.

Well it works,but so did the other one so yeah,we'll see.
I'm measuring 2.9V on the GPIO pin,which is a little less than expected.
by Pihkal
Mon Dec 31, 2012 1:26 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO lowest input voltage that still reads logic high.
Replies: 23
Views: 6966

Re: GPIO lowest input voltage that still reads logic high.

Hi again, i've changed the circuit can you please confirm if i did it correct? So,i've added a total of 133K (100K + 33K in series) between the tsop output pin and ground,since the internal pull-up resistor is 80K it should give me an output voltage of around 3.1V . Is it ok now or am i still mistak...
by Pihkal
Sun Dec 30, 2012 10:39 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO lowest input voltage that still reads logic high.
Replies: 23
Views: 6966

Re: GPIO lowest input voltage that still reads logic high.

Thanks,i think i finally understand why i haven't seen the magic smoke yet.
I will put another voltage divider after the tsop,i was going to do that anyway but now at least i understand why it works as is.
Thanks again for the good explanation.
by Pihkal
Sun Dec 30, 2012 4:43 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO lowest input voltage that still reads logic high.
Replies: 23
Views: 6966

Re: GPIO lowest input voltage that still reads logic high.

Thanks for the tip. I have another question,someone stated before that i"m overloading the TSOP but the datasheet says it can deliver 5 milliamps,since there's a 4K7 resistor in series with the output the maximum current that can be pulled from it is 1,06 mA (I=5/4700) so how is it overloading? I un...
by Pihkal
Sun Dec 30, 2012 1:35 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO lowest input voltage that still reads logic high.
Replies: 23
Views: 6966

Re: GPIO lowest input voltage that still reads logic high.

You are right,the 1.3V was when it was connected to the pi. I just took another TSOP,connected it to a 5V powersupply and measured the output of it,it's outputting 5V,just like you said. So i'm wrong. I could use a transistor but i prefer to use a divider. If i just use higher value resistors it sho...
by Pihkal
Sun Dec 30, 2012 1:01 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO lowest input voltage that still reads logic high.
Replies: 23
Views: 6966

Re: GPIO lowest input voltage that still reads logic high.

Hi, thanks for the comprehensive explanation. I'll explain what i was doing,it's really simple. I just wanted to connect a TSOP1738 (i have a bunch of them) IR-receiver to use with XBMC,but it's a 5V device and the SoC isn't 5V tolerant so i figured i'd just put a voltage divider behind it to lower ...
by Pihkal
Sat Dec 29, 2012 11:13 am
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: GPIO lowest input voltage that still reads logic high.
Replies: 23
Views: 6966

GPIO lowest input voltage that still reads logic high.

Hi all,

i'm wondering what the minimum voltage on a digital GPIO pin must be to still read a logic 1.
Would 2,5V still register as logic 1?
On the other hand,would 3,4V cause any damage?
These are the 2 options i have for the moment.

Thanks
by Pihkal
Fri Dec 28, 2012 3:41 pm
Forum: General discussion
Topic: GParted Help!!!
Replies: 9
Views: 2436

Re: GParted Help!!!

Here you go:

http://www.partitionwizard.com/free-par ... nager.html

It's free,made for Windows and can deal with EXT-partitions.
Greetz
by Pihkal
Tue Dec 25, 2012 2:26 pm
Forum: Advanced users
Topic: core_freq overclock and SD-card corruption.
Replies: 20
Views: 13269

Re: core_freq overclock and SD-card corruption.

Well that was strange,the first time i've booted with the changed cmdline.txt Quake hanged,i had to pull the powerplug to reboot. After rebooting everything looks ok. So i've played a little quake and messed around in the desktop,seems to work fine. I haven't mentioned this before but before i reboo...
by Pihkal
Tue Dec 25, 2012 1:30 pm
Forum: Advanced users
Topic: core_freq overclock and SD-card corruption.
Replies: 20
Views: 13269

Re: core_freq overclock and SD-card corruption.

Yeah,i know it doesn't really makes sense but strangely it workes.
I've checked the emmc speed with vcgencmd measure_clock emmc and it reports 200 Mhz.
Anyway,i'll change the cmdline.txt and test some more,i'll report back to you within a few hours (or minutes if it gets corrupted again).
by Pihkal
Tue Dec 25, 2012 1:10 pm
Forum: Advanced users
Topic: core_freq overclock and SD-card corruption.
Replies: 20
Views: 13269

Re: core_freq overclock and SD-card corruption.

I've doubled init_emmc_clock to 200000000 (200 Mhz) but didn't tell the linux driver,i left it at 100 Mhz in cmdline.txt . I also doubled the core_freq to 500 Mhz,this worked great on a Transcend 4GB Class 6 card in Raspbian,it gave a massive performance boost. The SD transfer rate also increased a ...
by Pihkal
Tue Dec 25, 2012 2:02 am
Forum: Advanced users
Topic: core_freq overclock and SD-card corruption.
Replies: 20
Views: 13269

Re: core_freq overclock and SD-card corruption.

Well there's been a shocking development! In the overclock-thread a user named Tompen suggested he got rid of the corruption by doubling the core_freq and the emmc_clock,i can confirm this,IT WORKS! Don't know why because it sounds a little absurd but i'm not complaining. I haven't done much testing...
by Pihkal
Mon Dec 24, 2012 3:14 pm
Forum: Advanced users
Topic: core_freq overclock and SD-card corruption.
Replies: 20
Views: 13269

Re: core_freq overclock and SD-card corruption.

Done some more testing. Since i've never tested for stability with Quake3 i decided to compile it and test. Turns out the oc wasn't stable. So i started the oc proces again,starting with the arm,next ram followed by gpu and last the core. This is my config.txt at the moment: arm_freq=925 over_voltag...
by Pihkal
Mon Dec 24, 2012 11:40 am
Forum: Gaming
Topic: How to install/ build/ play Quake 3....
Replies: 201
Views: 198125

Re: How to install/ build/ play Quake 3....

You don't need a cd-key for the demo.

If you can't run the game (command not found) go to the folder were ioquake3.arm is located and type:

Code: Select all

sudo chmod +x ioquake3.arm
Now try to run the game again,it should work.

Greets
by Pihkal
Sun Dec 23, 2012 8:08 pm
Forum: Advanced users
Topic: core_freq overclock and SD-card corruption.
Replies: 20
Views: 13269

Re: core_freq overclock and SD-card corruption.

Been doing some testing,ended up with a corrupted card. Though i think it was caused by my own stupidity... Here's what i did: set init_emmc_clock to 150000000 set sdhci-bcm2708.emmc_clock_freq to 150000000 (so i thought) Didn't change core_freq. Hdparm showed a decrease in performance of 4MB/s set ...

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