CNX Software – Embedded Systems News
Reviews, tutorials and the latest news about embedded systems, IoT, open-source hardware, SBC's, microcontrollers, processors, and more
“What board can I use for xxx development?” is one of the most common questions I can see on forums or groups. So I’ve decided to list what I consider the best embedded Linux / Android development boards, micro-controllers development kits and hackable gadgets. I also provide a list of hardware I own to satisfy the curiosity of some, and possibly for others who are interested in collaborating in some ways.
I’ve been wondering how the Raspberry Pi would handle WordPress. I’ve found some instructions using Apache 2, but this may not be the best server to use for this type of low-end hardware. nginx server requires less resources, and as it is what I already setup for this blog, I decided to give it a try on the Pi. I’ll provide all the detailed steps I followed below, but you can also download the compressed SD card image (113 MB), uncompress it and copy it to an SD card the usual way. After the system boots, find your Raspberry Pi’s IP address, type it in your PC’s browser, and you should see the page pictured below. If you want to login to the dashboard, the username is “admin” and the password “raspberry”. Instructions to Install WordPress on Raspberry Pi You can use your default Debian Linux distribution (e.g. Raspbian) if […]
The Hackberry “development board” is now available for sale on Miniand. This board powered by AllWinner A10 processor comes in 2 versions: 512 MB RAM version – Available now for $60 1GB RAM version – Available by the end of the month for $65. Both boards features a 4GB Flash, a SDHC slot, 2x USB 2.0 port, 10/100 Ethernet, Wi-Fi, HDMI & composite outputs, headphone & microphone ports and a IR sensor. The good thing is that serial interface and FEL connectors will be soldered on the board for easy debugging and recovery. The FEL recovery port allows to reflash the board using Livesuit. As a side note, Henrik, a developer involved in Allwinner A10 software development, has done some work to reverse engineer FEL USB protocol, wrote a small program to enter into Livesuit mode with an SD card (Go to the bottom of the page section “Forcing FEL […]
An initramfs is a minimal root filesystem that is loaded at an early stage of the boot process, before the rootfs partition is mounted. This is optional but is now used by many Linux distributions such as Ubuntu in order to speed up boot time among others things. Up to recently, there was no support for this in the AllWinner A10 nightly builds, and there would be lot of error messages due to ureadahead process with Ubuntu, but I’ve changed that by: Using a boot.scr file (U-Boot Script) for each supported device in order to either follow the default init boot method or do an initramfs boot if uInitrd file is present in the FAT partition. Adding a script (a1x-initramfs.sh) to generate and install uInitrd initramfs in the rootfs. The initramfs can’t be generated at build time since the hardware packs are (mostly) distribution agnostic. If you want an initramfs, […]
I’ve been tipped yet another time by one of my reader (Thank you Alex!) about an interesting low cost ARM device. H6 Netbook is powered by AllWinner A10 processor with 1 GB RAM and 4GB Flash, features a 10″ display (non touch) and runs Android 4.0.3. I wrote about the Sunlike UMPC-1021 in April, but the H6 is the first AllWinner A10 netbook – that I know of – that is available for retail. Here are the specs of this ARM netbook. CPU – AllWinner A10 @ 1.0GHz (Cortex A8;) with Mali 400 GPU System Memory – 1GB RAM Storage – 4GB Flash + SD Card slot (up to 32 GB) Display – 10″ LCD Display (no touchscreen) with 1024×600 resolution. Connectivity 10/100M Ethernet Wi-Fi 802.11 b/g/n built-in 3G support via external 3G dongle: E1916, ZTE AC2736, HUAWEI E1750, HUAWEI EC122, HUAWEI EM770W… USB – 3x USB 2.0 Host ports […]
CX-01 is a cool low cost Android mini PC (as low as $40), but unlike many other Chinese Android device it is not rooted. Here are the instructions to root it: Download Unlock Root http://www.unlockroot.com/. NB: The download link does not appear to work right now, but the filename is unlockroot23.exe, so here are some alternative untested download links. Find Unlockroot\driver\android_winusb.inf in the directory where you install Unlockroot Open the file in a text editor, and add the following lines: For Win 7 (64-bit): [Google.NTamd64] 64-bit] ;TCC8920 %SingleAdbInterface% = USB_Install, USB\Vid_18D1&Pid_DEED&MI_01 %CompositeAdbInterface% = USB_Install, USB\Vid_18D1&Pid_DEED&Rev_0231&MI_01 For WinXP (32-bit): [Google.NTx86] ;TCC8920 %SingleAdbInterface% = USB_Install, USB\Vid_18D1&Pid_DEED&MI_01 %CompositeAdbInterface% = USB_Install, USB\Vid_18D1&Pid_DEED&Rev_0231&MI_01 Connect CX-01 to your PC via USB, it should then detect your new device. If it doesn’t simply press “fn” key on CX-01 TV Stick. Select the driver that you edited in Unlockroot\driver\android_winusb.inf Once the driver is installed, run unlockroot Press ROOT, then […]
Eben of the Raspberry Foundation announced that a developer (Naren) has been working on a port of Android 4.0 for the Raspberry Pi, and the port already appears to be a an advanced stage with hardware-accelerated graphics and video working smoothly. The only major issue is the lack of support for AudioFlinger. The demo below shows Android 4.0 running in the Pi without audio as it’s not implemented yet. The UI is relatively smooth, and video playback and YouTube video streaming work pretty well. This is quite impressive considering the Raspberry Pi has less than 256 MB of memory available to the system, and I suppose they must have made some compromises to make this work. Moreover, I would expect that many applications won’t run properly due to the ARMv6 processor and low system memory. The source code and binary release are not available yet, as this port uses a […]
Many embedded systems applications do not require a desktop environment or graphical interface on the screen (e.g. server), and you may want to only install the files you really need on the SD card either to reserve as much space as possible for data and/or your program or to reduce costs. After searching for a minimal image based on Raspbian ARMHF distribution for the Raspberry, I could only find Linux Systems minimal image based on the Alpha version of the Raspbian Wheezy. Their compressed image is 109 MB in size, has a custom kernel, sshd and ntpd are enabled, but the wireless tools were deleted, and at the time the swap was located in another partition instead of a file inside the rootfs. The uncompress rootfs is about 414 MB (as reported by df -h when mounted as a loop device). I decided to prepare a minimal image myself based […]
