Database Develop

[Q] usb keyboard with case

I purchased the case with imbedded keyboard and initially the kb worked great. However, now I can't get it to function at all. Have tried playing around with settings etc., but no go. Anyone having success or probs with this keyboard? Thanks,
ooorah

Have you tried restarting the A7? (fully power down, not just lock the screen)

Coonecting a keyboard...
ooorah said:
I purchased the case with imbedded keyboard and initially the kb worked great. However, now I can't get it to function at all. Have tried playing around with settings etc., but no go. Anyone having success or probs with this keyboard? Thanks,
ooorah
Click to expand...
Click to collapse
I read the users manual (available on-line) and they clearly state that the USB port only has support for USB flash drives.
2.3 Connecting USB Devices
With the USB 2.0 host port, you can connect USB flash drives to your
Tablet to access external files. The Tablet supports drives up to 64GB in
size. Please note that some older USB 1.1 devices may have
compatibility issues.
The Tablet supports flash memory drives only; it does not support other
mechanical drives
The other way to connect a keyboard is via bluetooth. Again, the A7+ supports limited Bluetooth connectivity:
Bluetooth Device Requirements
The A7+ Tablet officially supports only A2DP Bluetooth devices with
stereo audio capability. Mono devices such as cell phone speakers and
earpieces are not compatible.
Important Note: The A7+ does have limited Bluetooth compatibility with
certain Mac computers and other assorted peripheral devices, but it does
not support printers, scanners, bar code readers or most other peripheral
devices even though the Tablet will detect and “pair” with such devices.
The necessary “connection” can only be made with proper drivers. Until
hardware manufacturers of these devices create the necessary drivers to
support both Android and the Tegra
This information is from the latest version of the owners manual dated March 2012. I'm afraid that you're out of luck unless you upgrade the operating system.

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[Q] UHS-I Support a Possibility?

Hey guys,
I've been looking over this document: SD 3.01 Spec specifically from pages 13-15 regarding UHS modes. It would appear that in order for the host to access the card at UHS DDR50 mode, it simply needs to issue another command after initialization. My questions here are:
1) What is the SD host controller on the Nexus One (i.e: is it part of the Snapdragon QSD8250 SoC, or is it a separate chip that it contacts over a serial bus?)
2) Can portions of the AOSP/Kernel/Reverse engineered host controller firmware be rewritten to support UHS-I speeds, or is this impossible in a host chip designed before the SD 3.0 spec was even released?
Thanks in advance.

SD controller is a part of QSD8250.
To access the card, you need to send the command. To receive the card's answer and any communications afterwards, you need HW logic to sample and further process DDR communication. If this logic was present - this thread wouldn't be open...

Aww, was hoping maybe Qualcomm future-proofed the QSD8250 a little bit. Oh well, thanks.

[Q] SPDIF audio passthrough possibilities for RPi?

Have no HDMI in my house. I can convert HDMI to DVI and run it into monitors, but that leaves me with no digital audio. The RPI is weak enough that I would rather offload the audio rendering to a receiver. What inexpensive and cpu efficient ways have you found to get optical or coax spdif / toslink passthrough?

You could check out the HiFI Berry:
http://www.hifiberry.com/
There are USB DACs as well.

oribunokiyuusou said:
You could check out the HiFI Berry:
http://www.hifiberry.com/
There are USB DACs as well.
Click to expand...
Click to collapse
More than I was expecting to pay, but it's an option that I did not know was available. I've used DACs for audio recordings. Does anyone know if there is considerably less cpu overhead for those vs the onboard analog out and some that have been tested with XBMC Rpi distros?

fields_g said:
More than I was expecting to pay, but it's an option that I did not know was available. I've used DACs for audio recordings. Does anyone know if there is considerably less cpu overhead for those vs the onboard analog out and some that have been tested with XBMC Rpi distros?
Click to expand...
Click to collapse
The HiFiBerry Digi is an S/PDIF output (can be found on the same web site). The HiFiBerry DAC has been tested with Raspbmc. The support in the current version still does not work, but the january release of Raspbmc should fix this. I would expect that the HiFiBerry Digi will also be supported in Raspbmc soon (but not in the january release).
I don't have did any tests with the onboard sound, but with the HiFiBerry DAC there is only a minimal CPU load, as data transfer to the sound card is mostly done via DMA.
Best regards
Daniel

I'd probably go with the hifiberry AS it just fits and isn't too expensive. There are pretty cheap bay China USB China sound cards, they work ootb with raspbian. Or you go full high end with the Buffalo DAC which is what i did. I know, it's just Voodoo...
D802 @ AOSPA 4.4

Hi, I just stumbled upon this old post. Anyway, here's how I resolved the same problem:
Buy HDMI to HDMI + SPDIF + Analog converter from eBay, plug it in and you're good to go.
I'm not allowed to post links so: search for "hdmi spdif", select order by price+P&P: lowest first. It' the one like on the image.
It's true passthrough (Dolby, DTS), and you don't need any kernel modules, and you get to keep it or use it elsewhere, unlike with HiFiBerry.
...and you get a free set of knives :laugh:
here are the flags from config.txt:
config_hdmi_boost=4
hdmi_drive=2 (I think this one is important)

Raspberry Pi based HDMI(1080/4k) capture solution?

Hello!
I was wondering about the feasibility of having an HD capture setup using Raspberry Pi. Is there any boards that we can host on Raspberry Pi 3 which can capture clear HDMI signals?
Basically I am looking at a cheaper solution to capture multiple HDMI sources (1080p or 4k) using individual Raspberry Pi modules per each (or 2) signals. By this, my aim is to avoid using expensive multi-input cpature cards and a PC to capture.
Any inputs highly appreciated
Thanks!

HUBPiWi
Hi
What about HUBPiWi with three USB and a wifi which can be used with Raspberry Pi0 or 1.3. Have anybody used it or bought it please let me know

Most HDMI capture adapters require USB 3.0, which none of the released Pi's have. Even if this was feasible, once you start adding up the cost of the Pi's and USB capture cards, you quickly start to approach the cost of lower-end professional units/a dedicated PC.
If you're using this to do production work, I'd recommend looking into a dedicated solution like a Tricaster Mini or a Blackmagic ATEM Production Studio 4k. I'm not sure if it'll record multiple streams simultaneously, as it's more for live productions. I used to have the 1080p version of the ATEM. You could only record the output channel via USB, but it worked good as a production-level switcher.
Trust me...I've went down this same route in an effort to save on equipment for doing production-quality podcasts. In the end, I wound up going with multiple 1080p webcams w/ multiple USB PCIe cards (so I could do 2 cameras per bus), XSplit Producer and only use HDMI capture when absolutely necessary.