Detail Photos Raspberry Pi Touchscreen Wire

Here are some detail photos from the rasberry pi wires to the usb touch controller and the 5V power from the usb wire. I have cut a normal USB wire and melted it to the power connector.

https://plus.google.com/photos/103195993650715866488/albums/5873445677799026241?authkey=COq6wce5hrep8AE

raspberry pi with usb powerbank accu

Next step for my raspberry pi project was to become mobile :-)

So i bought a USB Powerbank with 2 USB Poweroutputs to deliver enough power for the raspberry pi and my touchscreen. Both work on 5V.
I bought following powerbank from ebay for 15 EUR :

http://www.ebay.de/itm/110989165547

Some technical data:

• Output Capacity : 18.5Wh ( 5000mAh ).
• USB Port 1 : 5V, 1A.
• USB Port 2 : 5V, 500mA .
• charging time ca. 8,5 hours
• Input: DC5V 500mA
• max Output : 1.5A .
• 110 * 70 * 16mm
• 145g

And here is a short video on youtube:

Raspberry Pi - Howto recompile raspbian kernel

At first, i use Fedora. You can download Fedora here and start the .iso in a vmware or virtualbox. In fedora you need following packages

yum install gcc.x86_64 gcc-arm-linux-gnu.x86_64 git.x86_64 ncurses-devel.x86_64 

Then you have to download the raspberry pi 3.2.27 sources vom github:

 https://github.com/raspberrypi/linux/archive/rpi-3.2.27.zip 

 extract the zip file and go into the linux archive.

1. cp arch/arm/configs/bcmrpi_cutdown_defconfig .config 

2. make ARCH=arm CROSS_COMPILE=/usr/bin/arm-linux-gnu- menuconfig

Then the menuconfig will pop up and you have to select the device drivers under:

[Device Drivers] / [Input device support] / [Event interface] 

[Device Drivers] / [Input device support] / [Miscellaneous devices]/ [User level driver support] 

[Device Drivers] / [HID Devices] / [/dev/hidraw raw HID device support]

Next steps: compiling the kernel and copy it to the sdcard:

1. make ARCH=arm CROSS_COMPILE=/usr/bin/arm-linux-gnu- -k

2. mkdir ~/linux/modules

3. make ARCH=arm modules_install INSTALL_MOD_PATH=~/linux/modules

4. cp ~/linux/modules /[here comes the path to the sdcard]/lib/modules

5. cp ~/linux/arch/arm/boot/Image /[here comes the path to the sdcard]/boot/kernel.img

Reboot the rasberry pi and have fun. I will upload my .iso in the next few days. (this howto is based on the howto by Thomas Grziwa. Thanks a lot!

Issue: Calibration of Touchscreen under Raspbian

A great Link collection for touch calibration tools: http://tias.ulyssis.org/calibration/ and a great overview of the whole USB-HID and USB-non-hid touch issue: http://tias.ulyssis.org/calibration/device_support.html

Raspberry Pi Touchscreen

All informations about my raspberry pi touchscreen.

This is my 7" touchscreen, which i bought from an ebay seller called chinatobby2011 . It was an auction and i won it with a 45 EUR bid (free shipping).

An overview of the whole stuff linked together you can find in this video:

Its a 7" resistive touchscreen and called AT070TN92 V.5. This Touchpanel is linked to a controller board called VS-TY2662-V1 or PCB800099. I have made a screenshot from the ebay auction: goo.gl/hd9Nt  The auction title is: "HDMI+VGA+2AV Driver board+7inch 800*480 AT070TN92 V.5 Lcd with touch panel".
The direct link to the auction is: www.ebay.com/itm/170937641798

There are several issues:

The drivers, which are shipped with the board do not support ARM chipsets. (And the raspberry pi is based onARM architecture).
But i have found out, that rasbian delivers a driver:

egalax driver for raspberry pi

You just have to recompile the kernel.
(Howto will be created soon)
 

New Blog!

After my old blog crashed with a not known database issue, i will start over here on googles blogspot. So no database problems and hosting issues. Just naked hardware & software hacking stuff in your face ! ;-)
In the last few weeks the raspberry pi catched my attention and i am going to post several videos and howto stuff here. Furthermore, i have a lot of other hardware stuff to publish and archive here for interested geeks.

You can find my older videos on youtube:

http://www.youtube.com/user/renrulztk