Tag Archives: linux - Page 2

Flash BeagleBone Black using Linux

BeagleBone Black

BeagleBone Black

Today I received my BeagleBone Black! For 45$ you get more power and even HDMI. There is also a serial debug port now on a distinct header connected to UART0 of the CPU. The user can connect to this serial port with a TTL converter (like the FTDI-USB-Cables) and a terminal emulator. Set the baudrate of 115200 and you should be able to see U-Boot, the boot process and a login prompt in the end. Everything worked fine, except when I tried to connect using SSH it failed with an error:

$ ssh
ssh_exchange_identification: Connection closed by remote host

I could no figure out how to resolve this on the currently running firmware so I followed a tip on the mailing list to just upgrade the firmware. On linux this is normally a fairly easy process, one has just to decompress the image and pipe it to a SD-Card.

unxz --stdout BBB-eMMC-flasher-2013.04.13-DDR3-400MHz.img.xz | dd of=/dev/mmcblk0

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DisplayLink under Ubuntu

DeLock Port Replicator contains DL-165

DeLock Port Replicator contains DL-165

To have some more connection options for different embedded devices I bought a port replicator. My favorite dealer offered an adequate device from DeLock: DeLock USB 2.0 Port Replicator (87503). It supports DVI (and also VGA using an adapter), powered USB and Ethernet. But according to the device description and according to DeLock the device doesn’t support Linux. I asked which graphic chip is inside this device and I get a quick response: DisplayLink’s DL-165. This chip is supported by Linux using the udlfb driver. There are other drivers needed for the rest of the functionality, so I was not sure it is really working completely with Linux. but I’m an optimist, so I ordered the device… 🙂

Now I could take a look at it: The device consists of an USB-Hub, an ASIX AX88772 USB 2.0 Ethernet adapter and the mentioned DisplayLink DL-165 adapter. All devices are being detected by my Ubuntu 11.10 (Oneiric Ocelot) without additional packages. The output of dmesg shows the detected devices. My monitor turned to the udlfb green as expected. Read more »

Fix numpad in linux

Recently my numpad didn’t worked. Googling around I found the solution: My keypad was in a cursor control mode. Switching back to numpad is easy as that:


Building an image for BeagleBone



A few day’s ago TI anaounced a new BeagleBoard: BeagleBone. It’s a stripped down BeagleBoard which basically only has a USB slave-client (providing a serial console, a JTAG debugger and an USB connection to the processor) an USB host controller, an ethernet port and a lot of I/O’s on the PIN-Headers for $89. It’s a bit inspired by the popular Arduino boards. I always thought about buying a BeagleBoard, but it was a too expensive and too functional to use it for my electronic projects…

So in my case, TI’s strategy worked: I want some more power, I want Linux, but it souldn’t be too expensive. I’m going to buy the BeagleBone, i’m just not yet sure about the quantity 😉 But it’s not here yet, in the meanwhile I looked at the software a bit: How can I create root images for the BeagleBone? Read more »