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by nijhawank
Thu Oct 25, 2012 8:52 am
Forum: General discussion
Topic: what happend to the android port
Replies: 0
Views: 432

what happend to the android port

Hi all:

It has been some that we had any news regarding the android port for RPi. The last we heard was that some audio stuff was remaining.

Is there any update on this?

Thanks.
by nijhawank
Wed Sep 12, 2012 5:22 pm
Forum: Advanced users
Topic: dynamic memory split
Replies: 16
Views: 5578

Re: dynamic memory split

I think the dynamic split can be built on the idea of swap space. Let's suppose the CPU needs more RAM and we have some API to get it from GPU. We can build a swap in this newly allocated section. Turn the kernel swapiness to max in order to get the best possible use of this newly acquired swap that...
by nijhawank
Tue Sep 11, 2012 4:34 pm
Forum: Beginners
Topic: automatic root fs mount from usb if available
Replies: 2
Views: 861

Re: automatic root fs mount from usb if available

itimpi wrote:You can change the cmdline.txt file on the FAT partition (/boot) to tell the kernel to use root from a USB HD.
I have already tried this and its working but I want a solution that if usb drive is not inserted then it should go ahead and use the root fs from mmc.
by nijhawank
Tue Sep 11, 2012 9:44 am
Forum: Beginners
Topic: automatic root fs mount from usb if available
Replies: 2
Views: 861

automatic root fs mount from usb if available

Hi all:

Can it be possible in future versions to have raspbian mount the root fs from USB hard disk if available and fall back to mmc if not?

I would also be fine if there is some tinkering I would have to do to enable it in my installation. Can somebody help.

Thanks.
by nijhawank
Tue Sep 11, 2012 5:59 am
Forum: Advanced users
Topic: dynamic memory split
Replies: 16
Views: 5578

dynamic memory split

Two simple questions: 1. Would it be possible sometime in future to choose a different memory split without replacing the start.elf and rebooting. Something like we start with one memory split, but it be possible to change the split by the kernel? 2. Probably the question is: is it at all technicall...
by nijhawank
Wed Sep 05, 2012 4:48 am
Forum: General discussion
Topic: Berryboot v1.1 - Boot menu / OS installer
Replies: 557
Views: 285763

Re: Berryboot v1.1 - Boot menu / OS installer

Can you put in the change log exactly what version (commit) of the kernel you are using?
by nijhawank
Fri Aug 24, 2012 6:37 am
Forum: Advanced users
Topic: connecting portable usb hard disk
Replies: 15
Views: 14528

Re: connecting portable usb hard disk

That's is awesome. I was trying to avoid that kind of work and increase of mess near my tv rack (where Raspberry lies). I bought a powered HUB with 7ports (it can be powered through USB only, but I plugged ac adapter together) it says adapter have 1000mA, my external USB HDD requires 850mA. Connect...
by nijhawank
Sun Aug 19, 2012 5:36 pm
Forum: Advanced users
Topic: connecting portable usb hard disk
Replies: 15
Views: 14528

Re: connecting portable usb hard disk

Ok so I'm here to post the status of my little mod. It works. What I did: 1. Cut the USB wire connecting my portable external hard disk with Raspberry Pi. 1a. The red wire was disconnected on the Raspberry side. 1b. Connected external power supply Nokia AC-8N (5v 890ma) to power my portable hard dis...
by nijhawank
Wed Aug 15, 2012 5:16 pm
Forum: Advanced users
Topic: connecting portable usb hard disk
Replies: 15
Views: 14528

Re: connecting portable usb hard disk

The 700ma might be a little low for the drive to spinup properly. If the drive starts chirping that is why. You might try switching to the 1A with the 700ma powering the RasPi. I would connect the grounds together, but it will work without it. The easiest method is to power it from a powered hub. B...
by nijhawank
Wed Aug 15, 2012 10:30 am
Forum: Advanced users
Topic: connecting portable usb hard disk
Replies: 15
Views: 14528

Re: connecting portable usb hard disk

Thank you all, I will post my results soon.
by nijhawank
Wed Aug 15, 2012 10:16 am
Forum: Advanced users
Topic: connecting portable usb hard disk
Replies: 15
Views: 14528

Re: connecting portable usb hard disk

Thanks for your replies, I'll try to do it and post my results. But is it fine that there are two power supplies added (as I don't have a power supply above 1A to power both RPi and the hard disk together) and the ground point (black wire) will be common to two +5v power supplies. Sorry I don't have...
by nijhawank
Wed Aug 15, 2012 8:32 am
Forum: Advanced users
Topic: connecting portable usb hard disk
Replies: 15
Views: 14528

Re: connecting portable usb hard disk

Can any body please reply?
by nijhawank
Wed Aug 15, 2012 6:14 am
Forum: Advanced users
Topic: Power over USB.
Replies: 15
Views: 10193

Re: Power over USB.

The bit I don't understand is what stops the hub causing trouble on its USB connection with the RPi - or does this need to have the cables cut as described elsewhere? If so, I can't find the photos that showed this very clearly anywhere - does anyone have a link if this mod is needed? If not, why n...
by nijhawank
Wed Aug 15, 2012 4:37 am
Forum: Advanced users
Topic: connecting portable usb hard disk
Replies: 15
Views: 14528

connecting portable usb hard disk

Hello friends: I have been planning to connect a portable usb hard drive with raspberry pi. The drive is NOT self powered so I'm thinking of doing a small mod. This is my plan: 1. cut a regular usb wire and disconnect the red and black power wires and leave the data wires intact. 2. have a nokia 5v ...
by nijhawank
Sun Aug 05, 2012 5:19 pm
Forum: Bare metal, Assembly language
Topic: dual boot understanding
Replies: 20
Views: 12572

Re: dual boot understanding

I can understand why loading a different kernel might not be possible. Is this because once the distribution specific kernel is loaded, there is no way to restore berryboot kernel on next reboot without the support from the loaded distribution? Not in any automated way. (can fix it by putting the c...
by nijhawank
Sat Aug 04, 2012 7:21 pm
Forum: Bare metal, Assembly language
Topic: dual boot understanding
Replies: 20
Views: 12572

Re: dual boot understanding

Are you the developer of berryboot? Can you tell, if berryboot is compiled with ARM hard float support? Yes and yes. Kernel and boot menu are compiled with a toolchain that defaults to hardfp (not that there is much to gain by that, given it doesn't really use floats, but doesn't hurt either). Than...
by nijhawank
Sat Aug 04, 2012 6:45 pm
Forum: Bare metal, Assembly language
Topic: dual boot understanding
Replies: 20
Views: 12572

Re: dual boot understanding

So that meets one of my requirement to have the correct memory splitting but what about the kernel, I guess it always loads the berryboot kernel and if the selected distribution has a differently compiled kernel, some of the distribution feature may not work. Additional kernels are not supported at...
by nijhawank
Sat Aug 04, 2012 6:15 pm
Forum: Bare metal, Assembly language
Topic: dual boot understanding
Replies: 20
Views: 12572

Re: dual boot understanding

http://www.denx.de/wiki/U-Boot/ denx is the company behind u-boot. if you think in a pc world, U-Boot = Grub Bootloader. Other systems as x86 normaly dont have a bios and then you "burn" U-Boot into a ROM for bootup. Nearly the same as EFI for Macs. There's no raspberry pi specific docume...
by nijhawank
Sat Aug 04, 2012 5:12 pm
Forum: Bare metal, Assembly language
Topic: dual boot understanding
Replies: 20
Views: 12572

Re: dual boot understanding

Hi, all is not possible. The Ram Config has to be compiled, so no boot switching. UBoot is a native bootloader yes, but not for raspberry pi. it loads after teh start.elf, as everybody else. so uboot is a native bootloader for platforms other than raspberry pi. then what advantages uboot has over b...
by nijhawank
Sat Aug 04, 2012 4:51 pm
Forum: Bare metal, Assembly language
Topic: dual boot understanding
Replies: 20
Views: 12572

Re: dual boot understanding

hello friends: So my questions are: 1. Would it be technically possible in future to have loader.bin providing us an option to choose between different start.elf(s) at boot time? 2. If not above, is it technically possible (in future) to have a single start.elf providing us to choose between differ...
by nijhawank
Sat Aug 04, 2012 4:47 pm
Forum: Bare metal, Assembly language
Topic: dual boot understanding
Replies: 20
Views: 12572

Re: dual boot understanding

But this is not what nijhawank wanted. he wants a bootup directly in a menu, not booting linux and doing this on a file rename thing and reset. It doesn't matter if there is a little trick of rebooting and file renaming involved in the process if we are able to achieve what we want to do. So from M...
by nijhawank
Sat Aug 04, 2012 4:42 pm
Forum: Bare metal, Assembly language
Topic: dual boot understanding
Replies: 20
Views: 12572

Re: dual boot understanding

After a lot of searching I came across two projects: 1. berryboot - but I guess it simply provides switching to different distributions but loads the same berryboot kernel always so my thinking is that it won't serve my purpose to use it to dual boot between raspbmc (which probably require 128/128 ...
by nijhawank
Sat Aug 04, 2012 8:57 am
Forum: Bare metal, Assembly language
Topic: dual boot understanding
Replies: 20
Views: 12572

dual boot understanding

hello friends: I have been reading a bit about boot process on raspberry pi and dual booing. This is my understanding of this, please confirm if I'm correct... 1. On initial powering of the raspberrypi, the GPU reads and executes bootcode.bin, which then loads loader.bin which inturn loads start.elf...

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