Hexino, a French company selling “fashion technology” under the brand RYVAL, may be offering the smallest USB flash drives available today with RYVAL Elf. This tiny mass storage device measure 1.8 cm x 1.8 cm x 0.68 cm, weights only 2 grams, and is available with capacities of 8GB, 16GB, or 32GB. The specifications listed on the company’s website are as follows: USB 2.0 compatible with Windows Vista, 7 and 8 Write speed – Up to 4 MB/s Read speed – Up to 12 MB/s Weight – 2 grams Dimensions – 18 mm x 18 mm x 6.8 mm Capacity – 8 GB to 32 GB Colors – Blue, Pink, and Green Material – Aluminium They only mention compatibility with Windows, but I don’t see why it could not work with Mac, Android, and Linux based devices and computers. It’s small enough to replace microSD cards for permanent storage expansion, […]
100W USB Power Delivery Solutions Coming Later This Year
Beside 5Gbps, USB 3.0 specifications promised the capability to deliver 100 Watt (20V, 5A) of power to charge laptops, monitors, and other relatively power hungry devices directly via USB. The USB IF is currently showcasing a prototype based on DisplayLink docking station capable of both charging a laptop and connecting to a display via the same USB “power delivery” cable, and is expecting retail products to become available by the end of the year. 100 Watt are only achievable for a full USB port, although micro USB power delivery is also possible but at lower power. The dock combines ROHM BD-92101 USB power delivery chipset with USB Graphics and docking chipset solutions from DisplayLink according to that press release. The main advantage of this system is that you don’t need to carry your power adapter without, you’ll just need to bring your laptop, and plug it into a compatible USB […]
$5.40 CHARGER Doctor Makes USB Power Measurements Easy
One way to make power measurement for USB powered devices is to make your own USB cable to allow for current measurement via a multimeter, but if you think it’s just too much hassle, I’ve found and purchased a small test device called CHARGER Doctor that shows voltage and current on a 4 digit display, and sells for $5.40 on DealExtreme. The device features a USB female out port, and a USB male input port, that you can place between your USB power adapter, and the cable to your device to alternatively display voltage (4 seconds) and current (9 seconds). It can be used for power consumption measurements, to test if your charger is working normally, or finding out the power adapter that will charge your phone the fastest. It’s said to support measurement between 3.5 to 7V and 0 to 3 A, with an accuracy of +/- 1%. I’ve […]
USB 3.1 Specifications Published, Supports Speeds Up to 10 Gbps
USB 3.0 specifications has been introduced in 2008 with support for up to 5Gbps bandwidth. Although, my PC has two USB 3.0 ports, I’m still very much living in a USB 2.0 world, as I’ve yet to use USB 3.0 peripherals… But progress never stops, and the USB 3.0 Promoter Group just approved the new USB 3.1 specification (PDF file) which can support data speeds up to 10 Gbps. So after Full Speed (12 Mbps, USB 1.1), High Speed (480 Mbps, USB 2.0), SuperSpeed (5Gbps, USB 3.0), we’ve now got SuperSpeed 10Gpbs (SUPERSPEED+) with USB 3.1. The standard is backwards compatible with USB 3.0 and USB 2.0, but apparently not USB 1.1. It will also allow for up to 100W to be sent through a USB cable. If you are a developer, three developer conferences are planned in order to provide technical details about USB 3.1: USB 3.1 Developers Day […]
Ethernet & USB Hub Combo for Android Mini PCs
The first time I saw a USB & Ethernet hub was the one that comes with SmartCandy mini PC, but I never thought of checking if they sold such item separately until this morning, as I’ve noticed that Asiapads is selling a “Zero Devices Hub” with 3 USB 2.0 ports and a 10/100M Ethernet RJ45 connector. Of course, you could always get a standard USB hub plus an external Ethernet USB dongle, but an all-in-one solution maybe more convenient for some people. Zero Device Hub sells for $14.99, and is said to be compatible with Android mini PCs such as Z4C and Z2C. I’ve also looked on DealExtreme, and there’s one device with the same features for $11.90, but according to users’ reviews it’s not compatible with Android. The same device is also available for $7 and up on Aliexpress. The Ethernet part is apparently based on DM9601, which works in […]
USB Debugging and Profiling Techniques – ELCE 2012
Kishon Vijay Abraham and Basak Partha, respectively software design engineer and tech lead at Texas Instruments, provide an overview of techniques that can be used to debug Linux USB drivers on the host PC or/and the device itself. Abstract: The widespread integration of USB into embedded applications presents many developers with the challenge of debugging problems, that are difficult to detect and isolate when a USB device misbehaves. This paper discusses about the various USB debugging techniques which includes debugging at the host PC, at the device and in the cable and discuss when each of the above techniques will be handy. This paper will also discuss about the various facilities provided within Linux kernel to aid in USB debugging e.g sysfs, trace points etc. and the various user space tools available to help USB debugging e.g USBMON. This paper also discusses about the profiling techniques at various levels in […]
Linaro 12.12 Release with Linux Kernel 3.7 and Android 4.2.1
Linaro release 12.12 has just been announced, and includes Linux Kernel 3.7 and Android 4.2.1. The tracking version (stable release) uses Kernel 3.4.22. This release upgrades Android to version 4.2.1, Ubuntu images are now based on Ubuntu 12.10 (Quantal Quetzal) and Linaro U-Boot 2012.12 has been released with support for Origen 4 Quad and Arndale boards. Further improvements have been done for OpenEmbedded ARMv8, where they replaced the php Apache module by php-fpm among other things. On the kernel side, USB drivers have been refactored, and a kernel size analysis have been performed on several platforms. The power management team has mainly worked on big.LITTLE IKS and MP implementations, and it’s the first time LEG (Linaro Enterprise Group) is included in the release, and they worked on UEFI for ARM, GRUB for U-Boot, and provided a Ubuntu server image for Arndale board which can boot via UEFI or UBoot. Here […]
How to Allow Apps To Write Files to USB Mass Storage Devices in Android
When you’ve got an Android media player or mini PC, you may want to connect an external USB drive and allow write access to this drive to some applications. However, this is disabled by default in Android, although file managers appear to allow copy/paste of files to those drives without issue. Some applications may even refuse to install if they can’t find writable SD card or USB mass storage device. I’ve tried to install the latest version of aTorrent (version 1.7.6) in my Mele A1000, and it could not install at all and returned a message like: Can’t install on SD card or USB device The solution below is adapted from a solution on XDA Developers Forums. Some instructions tells you to use an app such as Root Explorer to edit the files in Android (ES File Manager will also do, after allowing “Up to Root” option), but I personally […]