'embarcado' Category

  • mar
    09
    2010

    Welcome back NGW100!

    A some time ago I’ve bricked my NGW100 board by overwritten the U-boot from flash. To fix it was necessary using a JTAG interface, so I check some alternatives.

    AVR JTAGICE mkII (US$ 299) [official] http://atmel.com/dyn/products/tools_card.asp?tool_id=3353
    AVR JTAG ICE mkii CN (US$ 99)  http://enshop.avrvi.com/avrjtagicemkiicn.html
    AT AVR JTAGICE mkII clone (US$ 159) http://enshop.avrvi.com/jtagicemkiiclone.html

    Considering that NGW100 itself costs about US$ [...]

    posted in embarcado by Tiago Maluta

  • fev
    24
    2010

    ipconfig over usb ethernet

    I guess this post apply only if you are using Linux v.2.6.33-rc3 or above.
    You would have noted that kernel IP auto-configuration is not usable for some USB-Ethenet dongles on newer kernel because it starts before the USB devices are found. This was already discussed on LKML.  I proposed a workaround adding a section on menuconfig [...]

    posted in embarcado by Tiago Maluta

  • jan
    30
    2010

    First prototype for Beagle Board box

    After drawing a sketch for BeagleBoard this week I coud try something real. The board fit perfectly inside the box.

    The whole for DVI-D would be a little bigger, the way it is the user need stick the connector well to don’t loose image quality.

    The entries for USB and MMC fits together in the same whole.  I put [...]

    posted in embarcado by Tiago Maluta

  • jan
    14
    2010

    First sketch for Beagle Board box

    This is my first approach to make a case for Beagle Board. I used a plastic one that fits almost perfect, needed basically a 12 mm. spacer to height adjust. The box would be like this picture:

    And the BB would fit, inside the box, more or less like that:

    I still need consider some points:

    Even with [...]

    posted in embarcado by Tiago Maluta

  • out
    28
    2009

    Changes on kernel cross compiling

    Probably if you compile – many times – Linux for embedded hardware you change Makefile to your specific architecture and compiler. An example:
    # Set the ARCH and CROSS_COMPILE default values
    ARCH ?= arm
    CROSS_COMPILE ?= arm-unknown-linux-gnu-
    Latest Linux (~2.6.31) turns it deprecated (commit 575543347b5baed0ca927cb90ba8807396fe9cc9). Now [...]

    posted in embarcado by Tiago Maluta

  • set
    14
    2009

    Arduino Gentoo Install

    If you are reading this post it’s probably that you already checked other resources and had some problem to build  avr-g++ using crossdev utility.
    crossdev -t avr -s4
    Note that cpp compiler wasn’t created.
    # qlist cross-avr/gcc | grep bin
    /usr/i686-pc-linux-gnu/avr/gcc-bin/4.4.1/avr-gccbug
    /usr/i686-pc-linux-gnu/avr/gcc-bin/4.4.1/avr-gcov
    /usr/i686-pc-linux-gnu/avr/gcc-bin/4.4.1/avr-cpp
    /usr/i686-pc-linux-gnu/avr/gcc-bin/4.4.1/avr-gcc
    /usr/i686-pc-linux-gnu/avr/gcc-bin/4.4.1/avr-gcc-4.4.1
    The problem is easy to fix. Simple edit /etc/portage/package.use/cross-avr changing ‘nocxx‘ to ‘-nocxx‘ and run emerge again.
    emerge cross-avr/gcc cross-avr/avr-libc [...]

    posted in embarcado by Tiago Maluta

  • ago
    21
    2009

    Using nandsim to mount large images

    Since I’m still using 32-bit machines I had to switch the way I mount large (> 128MiB) JFFS2 images. Now I’m using NAND simulator, an extremely useful debugging and development tool which simulates NAND flashes in RAM. The main problem with mtdram is  related with space reserved to vmalloc function on 32-bits processors (an hardware [...]

    posted in embarcado by Tiago Maluta

  • ago
    11
    2009

    libusb-1.0 with STLinux (sh4 platform)

    How-to of installing libusb-0.1 on STLinux

    posted in embarcado by Tiago Maluta