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Introducing Raspberry Pi B+

raspberrypi.org

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Re: Introducing Raspberry Pi B+

#191

Post by cheapsteak »

zapt02 wrote: post #173
TD-Linux wrote: post #163

Earlier quoted context omitted.

The Rpi is now a totally open source platform though, unlike the Odroid. Same for the Novena laptop. Also, I've heard bad things about the Odroid's stability under load. Do you have any problems? I've also definitely had problems with the Rpi under load, but I expect the new switching power supply to solve that.

I've had horrible experiences with Pi over load. SD card corruption very often. Tried various power bricks and several Pi's, always same issue - corrupt SD card after a couple of months of 24/7 use. Have an Odroid U2 running now for 6 months on an eMMC card without any issues. I know which one I prefer. :)

Out of curiosity, what are you guys using it for?

Re: Introducing Raspberry Pi B+

#192

Post by whyenot »

Alupis wrote: post #146
schappim wrote: post #24

What's the same: - Same Broadcom BCM2835 Chipset - Same 512MB RAM - Same full size HDMI port - Same 10/100 Ethernet port - Same CSI camera port and DSI display ports - Same micro USB power supply connection What has changed: - Now comes with 4 USB ports so you can now connect more devices than ever to your Raspberry Pi. - There is a 40pin extended GPIO so you can build even bigger and better projects than ever before…

This is quite the impressive release. The additional USB ports are a welcome addition, as-is the additional GPIO. I have one project in particular that will benefit from the additional GPIO. The microSD slot is also a big deal. microSD's are much more common now-days than SD's due to most people's phones having them. I own a slew of old mSD's from old phones and can re-purpose them into a Pi project now :)

The microSD card and changes to the ports (more flush USB) also reduce the footprint which means I should be able to cram a new version of my Pi motion activated camera into a smaller waterproof case. This makes me very happy. The lower power demands may also let me get away with using a smaller battery and solar panel.

Re: Introducing Raspberry Pi B+

#193

Post by mrb »

oasisbob wrote: post #165
gnaffle wrote: post #109

Earlier quoted context omitted.

My biggest gripe with the Pi is a lack of proper USB power, so if you add all the stuff you need, especially for a wireless setup it's not so cheap and compact anymore. I'm happy that they've (hopefully) fixed the USB power problem, that makes it much nicer as a platform.

I've been providing power over the GPIO header directly, and have had great results. Combine a DC-DC supply with a few smoothing capacitors on a small daughter-board, add a barrel jack + 0.1" headers to interface and you get a lot more headroom and flexibility with how you power it. (Same-ish end result as the other fuse bypass methods, but with no soldering on the pi, and the caps seem to help with the inrush curren…

The CUI V78xx is a really interesting part, thanks for the tip!

Re: Introducing Raspberry Pi B+

#194

Post by makomk »

usbreply wrote: post #175
kephra wrote: post #168

Earlier quoted context omitted.

It will work fine in 95% of the cases, but 5% will ruin their computer USB port, because the PI is not within the specs. The PI not only draws 750mA (old) or 600mA (new) when idle, but much more, if you attach SSD, and USB devices. The ramshackle micro USB port is a nogo for me.

reread the usb spec. it will not ruin the USB port.

Some really old computers have physical fuses on the USB ports that can - and will - blow if you draw too much power from them.

Re: Introducing Raspberry Pi B+

#195

Post by makomk »

kasperset wrote: post #177

I like my Rasberry Pi and yes it cannot be compared with Intel Galileo. But I am also pretty excited with this http://en.wikipedia.org/wiki/Intel_Quark http://www.intel.com/content/www/us/en/do-it-yourself/galile...

The Galileo has some interesting caveats, like a much slower CPU than even the Raspberry Pi and the GPIO, PWM, etc going through an IO expander chip on the really slow I2C bus. (Apparently there's a Rev2 with some native GPIO pins now, presumably not compatible with the Rev1 unless you use Intel's official abstraction layers.)

Re: Introducing Raspberry Pi B+

#196

Post by userbinator »

TD-Linux wrote: post #163
CalRobert wrote: post #77

For people saying they want a faster revision - do remember there are other computers in this form factor. I recently got an Odroid U3 and am very happy with it. Of course, it's $65, not $35. I tried setting up owncloud, nginx, a web server, etc. on a Pi and it couldn't handle it (everything ran, but terribly), the Odroid does well. I still like the Pi, though. There are some people for whom saving $30 really does ma…

The Rpi is now a totally open source platform though, unlike the Odroid. Same for the Novena laptop. Also, I've heard bad things about the Odroid's stability under load. Do you have any problems? I've also definitely had problems with the Rpi under load, but I expect the new switching power supply to solve that.

The Rpi is now a totally open source platform

The last time I looked, it still requires a binary blob to even boot, and despite Broadcom releasing (partial) documentation for the GPU, and claims that it should be possible to replace that blob, I haven't seen any advances on that front.

Re: Introducing Raspberry Pi B+

#197

Post by GutenYe »

schappim wrote: post #24

What's the same: - Same Broadcom BCM2835 Chipset - Same 512MB RAM - Same full size HDMI port - Same 10/100 Ethernet port - Same CSI camera port and DSI display ports - Same micro USB power supply connection What has changed: - Now comes with 4 USB ports so you can now connect more devices than ever to your Raspberry Pi. - There is a 40pin extended GPIO so you can build even bigger and better projects than ever before…

Have them fixed the broken USB system? (USB and Ethernet share the same bus problem)

Re: Introducing Raspberry Pi B+

#198

Post by girvo »

weland wrote: post #133
girvo wrote: post #96

Earlier quoted context omitted.

This is something I'm very interested in, and nearly bought a Pi today; I want a board that I can learn ARM assembly and C on to build a toy OS. I built half of a tiny kernel on X86 (woo real-mode!) nearly a decade ago, so I know a tiny bit about it all, but I'd assumed the Pi was a great target: well priced, tonnes of them out there so hopefully well documented, etc. What would you suggest instead? I'm considering j…

Basically what userbinator said. I had to deal with them before, so if you can, stay away from cheap Chinese boards or hackable routers. When you're just learning, it's not worth it, the dollars you save will be more than made up in working around subtle bugs and trying to figure out what the poorly-worded, incomplete documentation is trying to convey. I also warmly suggest not to bother with anything that says Ather…

I'll definitely pick a up a Black then, as I do love TI chipsets and have had good experiences with their documentation. Such a shame they left the mobile market.

I'm setting up QEMU to have a crack at that while I wait for it to arrive. Thanks for the advice! I wish I could get you started, damn NDAs, I reckon you'll have a few stories to tell

Re: Introducing Raspberry Pi B+

#199

Post by Alupis »

duskwuff wrote: post #187
kephra wrote: post #166

Earlier quoted context omitted.

But as far as I read, the PI can still not boot over Ethernet, which is a requirement for me to boot into backup cycle (Installation = Restore), and it still can not wakeup on LAN.

If you load U-Boot onto an SD card, the rPi can be configured to use that to boot over Ethernet. It's not a completely "pure" network boot, but that's impossible given the hardware. (There's simply nowhere for a bootloader to live besides the SD card.)

You need some sort of bootloader, even in a traditional PXE boot scenario... it's just that your BIOS hands off to the bootloader on your onboard PXE chip instead of to your OS's bootloader, etc. So, it's chain-booting no matter how you slice it.

You can setup your SD card to have U-Boot and not much else... just what's necessary for U-Boot to, well, boot. Then it takes over and does it's network boot of your full OS. So you can get a sort-of PXE boot setup.

Re: Introducing Raspberry Pi B+

#200

Post by CamperBob2 »

makomk wrote: post #194
usbreply wrote: post #175

Earlier quoted context omitted.

reread the usb spec. it will not ruin the USB port.

Some really old computers have physical fuses on the USB ports that can - and will - blow if you draw too much power from them.

Should probably upgrade, then, before spending more money on Raspberry Pis.
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