Bitcoin Forum
October 23, 2017, 11:47:52 AM *
News: Latest stable version of Bitcoin Core: 0.15.0.1  [Torrent]. (New!)
 
   Home   Help Search Donate Login Register  
Pages: [1] 2 3 4 5 »  All
  Print  
Author Topic: Raspberry pi usb device limitation?  (Read 14689 times)
CrazyGuy
Legendary
*
Offline Offline

Activity: 1938



View Profile
October 15, 2012, 10:45:13 PM
 #1

So my raspberry pi is coming in soon and I'm wondering if I'll have any issues mining with 9 bfl singles. I read somewhere that there was a 7 device limit people were running into. Is that true? If so, is it a memory limitation? Apparently all existing and future orders have been bumped from 256mb to 512mb.

ASICPuppy.net ASIC Mining Hardware and Accessories - Sidehacked S7s and 2Pacs in stock!
1508759272
Hero Member
*
Offline Offline

Posts: 1508759272

View Profile Personal Message (Offline)

Ignore
1508759272
Reply with quote  #2

1508759272
Report to moderator
1508759272
Hero Member
*
Offline Offline

Posts: 1508759272

View Profile Personal Message (Offline)

Ignore
1508759272
Reply with quote  #2

1508759272
Report to moderator
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
Zeek_W
Sr. Member
****
Offline Offline

Activity: 336



View Profile
October 15, 2012, 10:58:48 PM
 #2

You can always increase the power to the usb ports with this mod:
http://theiopage.blogspot.com.au/2012/06/increasing-raspberry-pis-usb-host.html

not sure about a device limit, but it could be related. - could you link me to an article please?

Also note that the Ethernet is ethernet to USB to the SOC.

CrazyGuy
Legendary
*
Offline Offline

Activity: 1938



View Profile
October 15, 2012, 11:13:05 PM
 #3

You can always increase the power to the usb ports with this mod:
http://theiopage.blogspot.com.au/2012/06/increasing-raspberry-pis-usb-host.html

not sure about a device limit, but it could be related. - could you link me to an article please?

Also note that the Ethernet is ethernet to USB to the SOC.

Don't remember where I read it, no official article, just hearsay. I have a powered 10 port usb hub so if it's a power issue I should be in good shape.

ASICPuppy.net ASIC Mining Hardware and Accessories - Sidehacked S7s and 2Pacs in stock!
jborkl
Sr. Member
****
Offline Offline

Activity: 242


Team Heritage Motorsports


View Profile WWW
October 16, 2012, 01:27:14 AM
 #4

I have a raspberry pi , and have a card for both xbmc and debian. The device is awesome, especially for xbmc.

I would not trust it to mine with 6 ghash of equipment, it is not stable enough for that.  They are prone to overheat and turn off, also there is a lan bug in my rev 2. Drops randomly

I also have a 512 coming from element 14

Zeek_W
Sr. Member
****
Offline Offline

Activity: 336



View Profile
October 16, 2012, 01:34:20 AM
 #5


I would not trust it to mine with 6 ghash of equipment, it is not stable enough for that.  They are prone to overheat and turn off, also there is a lan bug in my rev 2. Drops randomly

yeah I have heard of this issue before - you aren't the only one  Angry

jborkl
Sr. Member
****
Offline Offline

Activity: 242


Team Heritage Motorsports


View Profile WWW
October 16, 2012, 01:44:29 AM
 #6

Xbmc, no lan, Burned every dvd to a Toshiba external 750, programmed my harmony to act as the remote

Bought the mpeg2 lic, is awesome.  Best use for it I think

CrazyGuy
Legendary
*
Offline Offline

Activity: 1938



View Profile
October 16, 2012, 05:05:47 AM
 #7

I have a raspberry pi , and have a card for both xbmc and debian. The device is awesome, especially for xbmc.

I would not trust it to mine with 6 ghash of equipment, it is not stable enough for that.  They are prone to overheat and turn off, also there is a lan bug in my rev 2. Drops randomly

I also have a 512 coming from element 14

That's disappointing, I was hoping to use it for my BFL equipment when I shut off my dual 7970 machine for good.

ASICPuppy.net ASIC Mining Hardware and Accessories - Sidehacked S7s and 2Pacs in stock!
jborkl
Sr. Member
****
Offline Offline

Activity: 242


Team Heritage Motorsports


View Profile WWW
October 16, 2012, 05:10:36 AM
 #8

Well I will be happy to let you know how the 512 does.

They should have called it rev c, looks much improved.

I should have the new one in 2 weeks.

Zeek_W
Sr. Member
****
Offline Offline

Activity: 336



View Profile
October 16, 2012, 05:12:46 AM
 #9

I have a raspberry pi , and have a card for both xbmc and debian. The device is awesome, especially for xbmc.

I would not trust it to mine with 6 ghash of equipment, it is not stable enough for that.  They are prone to overheat and turn off, also there is a lan bug in my rev 2. Drops randomly

I also have a 512 coming from element 14

That's disappointing, I was hoping to use it for my BFL equipment when I shut off my dual 7970 machine for good.

maybe time to search for some kind of MicroATX motherboard - I know I am

tenzor
Sr. Member
****
Offline Offline

Activity: 302


View Profile
October 16, 2012, 07:03:08 AM
 #10

I have Pi, running 12 Cairnsmore1 (6usb). There are USB devices limit. 14 usb devices and probably usb hub limitation (2 hubs?). Also, it's very unstable with borads usb-serial converters, hanging randomly, so I switch usb speed to Full Speed. And turned off ethernet, since I use usb wireless. It works so far, 20+ hours. Locally connected keyboard respond very slowly when mining started. Looks like to much usb traffic and buggy usb driver. SSH works good.
Also, first hub (http://www.amazon.com/Satechi-Power-Adapter-Control-Switches/dp/B0051PGX2I/ref=pd_ybh_7) was backpowering Pi, so voltage on Pi drops below 4.70v.
RPi 1 rev, 256, running raspbian with last updates.
BR0KK
Hero Member
*****
Offline Offline

Activity: 742



View Profile
October 16, 2012, 07:55:19 AM
 #11

i have a pi and thought it would make a decent miner base......

But its not!

The Pi in its current state is a real bitch when it comes to USB connections. I hardly get a single Ztex board working there for a few hours. Then out of no reason the pi looses the device (including the hub) or freezes .....
A hard reset is then necessary to get it working again:/


dani
Hero Member
*****
Offline Offline

Activity: 525


..yeah


View Profile
October 16, 2012, 12:30:36 PM
 #12

So using an asic will probably not work because of too much traffic via usb? Thats pretty bad..

Hai
jojo69
Hero Member
*****
Offline Offline

Activity: 826


no FOMO


View Profile
October 16, 2012, 12:44:01 PM
 #13

pi development is proceeding rather quickly, patience people, its 3 BTC

This is not some pseudoeconomic post-modern Libertarian cult, it's an un-led, crowd-sourced mega startup organized around mutual self-interest where problems, whether of the theoretical or purely practical variety, are treated as temporary and, ultimately, solvable.
Censorship of e-gold was easy. Censorship of Bitcoin will be… entertaining.
Gatorhex
Full Member
***
Offline Offline

Activity: 126


View Profile
October 16, 2012, 02:06:02 PM
 #14

It is an IRQ memory address problem, I think, not a powered USB problem.

There were only enough memory addresses reserved for 8 USB devices and it uses 1 of those for networking, leaving you with a max of 7 that can talk at the same time.

You seem to be able to plug more than 8 devices in but they will be dropped and stop communicating if the USB/CPU gets too busy.

I'm going to use a netbook instead.
dani
Hero Member
*****
Offline Offline

Activity: 525


..yeah


View Profile
October 16, 2012, 02:13:21 PM
 #15

but what about the bandwith needed for an asic? I dont know anything about it, obviously nobody does, but im curious.
It seems my 1200mh/s server (4 gpus) uses less than 1,5 KB/s on wlan traffic. I dont think an external miner, like an asic, will generate anything above that traffic on an usb port. Of course the miner would also run on 1200mh/s to compare.

Anybody can give me a good guess what problems there might be using several asics on a pi?

Hai
AmDD
Legendary
*
Offline Offline

Activity: 997



View Profile
October 16, 2012, 02:20:21 PM
 #16

I had problems with my rpi and 1 ModMiner Quad. it would mine for a few hours then just stop... On the other hand I didnt play with it very long to find a solution or even what the problem was. Could have been the way I set it up... Need to dig it back out and try again.

BTC tip jar: 18EKpbrcXxbpzAZv3T58ccGcVis7W7JR9w
LTC tip jar: Lgp8ERykAgx6Q8NdMqpi5vnVoUMD2hYn2a
Gatorhex
Full Member
***
Offline Offline

Activity: 126


View Profile
October 16, 2012, 02:25:26 PM
 #17

Here you go, I found this..

"The Foundation has discovered that the controller and its driver expect realtime response from the ARM core, and if Linux's non-realtime scheduling doesn't respond in 1 ms, a split transaction USB event can be dropped. Not surprisingly, this occurs regularly and produces lost mouse clicks, stuck keyboard keys, etc.."

"This USB core had so many problem that we end up making it work only in full speed mode (and not high speed one). As you said split transaction don't work well (in our case we had seen irq storm that make linux freeze)."

http://hardware.slashdot.org/story/12/08/24/2228251/serious-problems-with-usb-and-ethernet-on-the-raspberry-pi

Broadcom, enough said!  Roll Eyes
CrazyGuy
Legendary
*
Offline Offline

Activity: 1938



View Profile
October 17, 2012, 12:23:17 AM
 #18

RS components shipped my 512mb today, maybe they've fixed some of the USB issues with this revision. If not I guess I'll have another toy to play with.

ASICPuppy.net ASIC Mining Hardware and Accessories - Sidehacked S7s and 2Pacs in stock!
Zeek_W
Sr. Member
****
Offline Offline

Activity: 336



View Profile
October 17, 2012, 12:41:24 AM
 #19

RS components shipped my 512mb today, maybe they've fixed some of the USB issues with this revision. If not I guess I'll have another toy to play with.

Keep us updated!

Gatorhex
Full Member
***
Offline Offline

Activity: 126


View Profile
October 17, 2012, 01:51:31 AM
 #20

lol Raspberry Pi banned the guy for pointing out the faults with Broadcom's USB.

http://www.raspberrypi.org/phpBB3/viewtopic.php?f=63&t=15320&sid=26ec7c5d29579e1ed13469d1e104bba7&start=25

Bid odd that a charity would not take criticism well (so I dug deeper!)...

...well it becomes clear when you realise the project co-founder is employed by Broadcom!

http://en.wikipedia.org/wiki/Raspberry_Pi_Foundation

Come on! How is that for a conflict of interest! No wonder it uses problematic Broadcom parts!
Pages: [1] 2 3 4 5 »  All
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!