2
Aug/12

Fixing error “httpServer.cpp read, write was not declared in this scope” on building vpl_xmlrpc_jail-1.2 under latest Debian

by under Linux Stuff

For all which also got this errors,

httpServer.cpp: In member function "std::string HttpJailServer::receive(int, e_t, size_t)":
httpServer.cpp:145:36: error: "read"was not declared in this scope
httpServer.cpp: In member function "void HttpJailServer::sendRaw(const char*,ze_t)":
httpServer.cpp:216:49: error: "write" was not declared in this scope
httpServer.cpp: In member function "void HttpJailServer::send(int, const stri, const string&)":
httpServer.cpp:250:15: error: "close" was not declared in this scope

on building vpl_xmlrpc_jail-1.2 for Moodle VPL module, there seems to be a missing include for these methods.

Just add,

#include <unistd.h>

to the httpServer.cpp, these should fix it.

have fun

Mario

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28
Jul/12

Fix for ASP.Net parser error message: Could not load type ‘xxxxx.Global’

by under .net Stuff, Projects

In one of my recent projects I stumbled about one annoying behavior of ASP.Net Projects.

For some reasons I got the meaningful error message :

Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Could not load type 'WebService.Global'.

Source Error:

Line 1:  <%@ Application Codebehind="Global.asax.cs" Inherits="WebService.Global" Language="C#" %>

Source File: /global.asax    Line: 1

In my case I solved the problem in changing the build output path from  bin\x68\Debug to : bin

hope this helps anyone

have fun

Mario

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20
Jul/12

WIN7_64 driver for Freescale ZStar3 ACC Sensor

by under Cool Stuff, Projects

A few years ago we bought some Freescale ZStar3 ACC sensor development packages for our student projects.

The development packages came with one sensor USB-dongle pair and a .net library to get the sensor data up to the PC.

We did quite a lot of projects with our students, until the day our IT-Devision decided to switch over to WIN7_64  :-) ….. Kabuuududduullll,….

Unfortunately  the driver package for the ZStar3 USB interface is only made for WinXP.

But,…. :-)

After some .inf file editing magic we (Letti (alias Joe) and Me) archived to alter the original driver information files to trick Windows to load and install the ZStar….. .sys

You can download the ZStar winx64 driver (for free) from here.

have fun  :-)

Mario

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16
Jul/12

MedIT-ePortal moves to moodle 2.3

by under Cool Stuff, Projects

Today we moved your moodle CMS to the newest version 2.3. Let’s see what all the new goodies can do for us :-)

have fun

Mario

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29
Jun/12

Some impressions of our last medical electronic laboratory 2012

by under Cool Stuff, Medical Technology, Student Projects

Some nice images from our last electronic laboratory. :-)

These photos show our medical electronic lab tutorial/lecture held by Matthias Haselberger

In these lab tutorials we teach our students the basic techniques used in medical biosignal acquisition devices such as electrocardiogram, electromyogram and biofeedback acquisition. After the tutorial the students are familiar with common amplifier circuits and also with complex instrumentation amplifier concepts.

have fun

Mario

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22
Jun/12

Some impressions of our last medical project seminar laboratory 2012

by under Cool Stuff, Student Projects, Uncategorized

Another year/semester has passed and we took (again) some nice images from our last lab tutorial. :-)

This photos show our medical project seminar lab tutorial/lecture held by Matthias Haselberger

The aim of the laboratory is to get familiar with the commonly used micro-controller devices used to measure and process biofeedback signals.

have fun :-)

Mario

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19
Jun/12

FlexCell innovative ways of flexible manufacturing

by under Cool Stuff, Projects

For the last days I have been involved in commissioning a new project started at one of our degree programs mechatronics at CUAS.

The FlexCell program is about innovative technologies usable for effective manufacturing in the field of automation technologies.

Project Leader : Christoph Ungermanns

One of the core components is a 6 axes industrial robot arm :-)

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have fun

Mario

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22
May/12

Rankz – an innovative middleware for sports event ranking information distribution

by under Android, Cool Stuff, iPhone, Projects

In one of my last posts I wrote about a young company Rarebyte. The folks from Rarebyte are mainly focused in game development but they also have a great experience in building highly scalable middleware applications for sport timing respectively sport events.

They are named their product line Rankz.

Rankz is desigend for small to very large sports events with thousands of  athletes. Its purpose is to get detailed information about every aspect of a sport event in real time. It has already been successfully used at the

Rankz is also the central core layer in a student project called “IRONNET” done by students from Network Engineering & Communication (NET) and is also the overall software basis purchased  by “Sport Telematics” (NET).  An older version is also operated by Triangle Show & Sports Promotion Gmb.

The middleware uses DI technologies which allows them to be highlight flexible. The data structures which specify the sport event can be entirely configured through XML. A full featured editor for XML/POJO  is also available. The interface to the timing database can also be configured through XML. For this reason you are neither limited by the used format of the timing data nor to the database engine. Rankz works out of the box with MySQL, PostgreSQL, Oracle, MSSql.

Furthermore Rankz uses a dynamic plugin system. So new features can be added very easily. Plugins can be loaded and unloaded @ runtime.

Features

  • Superfast – detailed results nearly live during a race
  • Support for plugins (input, output, calculations)
  • Platform independent (completely written in Java)
  • Integrated webserver (Jetty)
  • Plugins:
    • Overall ranking
    • Ranking per split
    • Ranking in athlete’s age group
    • Relative ranking at certain splits
    • Timing, average Speed, finishing context,….
    • statistic system and missed time error correction system
    • FTP plugin upload
    • Athlete’s (geographical) real time position prediction.
    • SMS/MMS Notification Service
    • Athlete’s@Twitter …
    • Virtual Athlete’s rankings (audience favorite….)
    • RESTful resource connectors
    • Webservice Revision Layer
  • Query engine
  • RESTful interface
  • Web output for all plugins
  • CSV exports for all plugins
  • Android/iPhone  (iOS) applications for live data/timing visualization (special version for Event Moderator/sport commentators).
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21
May/12

How to cross compile ffmpeg for iOS (iPhone and iPad)

by under Cool Stuff, iPhone, Projects

In one of my latest projects I needed some audio/video streaming capabilities for iOS driven devices.

The first App. which we implemented was a audio/HDVideo low latency conference streaming application for smart phones.

The second app was around  MPEG-TS to Elementary Stream demuxer for some dreambox streaming fun :-)

The framework of choice is the swiss army knife for streaming stuff,.. ffmpeg. To be more precise, ffmpeg consists of serveral libraries and the command line programs ffmpeg, ffplay, ffprobe.

What do you need:

  • Xcode4.3
  • Apple’s command line tools (Xcode -> Preferences -> Components)
  • pkg-config -> download
  • gas-preprocessor -> download (extract under your ffmpeg root dir ./gas-preprocessor)
  • build-essentials -> you can download an install script
  • m4
  • autoconf
  • automake
  • libtool

I used the latest snapshot available at the the time of writing. Extract the snapshot .tar to a folder of our choice.

Thanks Michael, the lead developer of ffmpeg, the ffmpeg source comes with the convenient autotools facilities. So we only need to set the correct configure flags :-)

1. Compiler flags:

As we need to do some cross-compiling we need to select the compiler/assembler which comes with our XCode

–cc=’/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-llvm-gcc-4.2′.

–as=’./gas-preprocessor/gas-preprocessor.pl /applications/xcode.app/contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/arm-apple-darwin10-gcc-4.2′

–arch=arm

–target-os=darwin

–cpu=cortex-a8

–enable-pic

–disable-yasm

2. iOs SDK path:

–sysroot=’/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk’

3. extra flags:

–extra-cflags=’-mfpu=neon -pipe -Os -gdwarf-2 -miphoneos-version-min=5.0′

–extra-ldflags=’-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS5.1.sdk -miphoneos-version-min=5.0′

4. configure ffmpeg library components:

for example:

 –disable-ffmpeg
–disable-ffplay
–disable-ffprobe
–disable-ffserver
–disable-avdevice
–disable-avfilter
–disable-everything

and then enable the components you need

–enable-decoder=xxx
–enable-parser=xxx
–enable-demuxer=xxx

after successful completion of ./configure run make… and voilà :-)

If you get some errors complaining about  “error: invalid operand in inline asm: ” try to disable assembler directives with

–diasble-asm

have fun

Mario

 

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3
May/12

iPhone4 slack joint microphone quickfix

by under Cool Stuff, iPhone

One of my colleagues, Marvin - proud owner of an iPhone4, has been fighting for some weeks with his iPhone internal microphone. Skype and Facetime stuff are working without problems but on “Radio” calls he got unsuspected mutes. The issue occurs in not deterministic intervals.

First aid,… yeahhh we have to open the phone, … operation on the open heart :-) .

The problem must be the bottom mic. So we disassembled the bottom part of the phone.

No fancy actions here,… one two three screws open, some lever actions to loosen the glue stuff and voilà it’s open.

If it were up to me I would eliminate the apple hardware and build in a Galaxy S hardware, but marvin was dead set against it,… I don’t know why :-)

“Update” :

We initial thought that the bottom microphone was causing the problem. It turns out we were wrong :-)

After 3 days without mic. problems I would say the problem is the grounding screw left next to the upper microphone. The conductivity pad on the print is very small and it seems that slight corrosion which results in an increased transition resistance to GND causes the mic problem. :-)

Have fun!

Mario

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11
Apr/12

Switching iPhone4 from custom iOS 4.3.1 to custom iOS 5.0.1

by under Cool Stuff, iPhone

It’s been a while I updated my developer iPhone4 to custom  iOS 4.3.1.  According to statistics more than 75 % of all registered mobile iOS Devices are on iOS >= 5.0. So I decided to switch over to 5.0.1.

It would be remiss not to tell you that 5.0.1 is currently also supported as Untethered jailbreak, which I need for some comprehensive study :-)

But here’s where the problem starts.

It’s been a while since Apple released version 5.0.1 and at time of writing the sign window is just closed. So if you build your custom ROM with your favorite RomOMagic Tool, put your device in DFU,.. fireup iTunes and start the recovery procedure,… you will end with a shine This device isn’t eligible for the requested build…… umpf WTF.

etc/hosts are ok, but iTunes cannot “sign” your ROM.

So what can you do?

First, as a brave jailbreaker you have your umbrella always with you and also a bunch of valid SHSH Blobs and the corresponding APTickets. We are interested in BLOBS for 5.0.1 :-)

Second, we need RedSnow. With this tool you can stitch (sign) an IPSW with your SHSH blobs.

Be sure to stitch only a custom ROM without the BaseBand!

voilà, no annoying isn’t eligible message,….after flashing your device should boot with a shiny new custom  5.0.1

be nice

have fun

Mario

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19
Mar/12

ICS 4.0.3 for POV, Advent,…

by under Cool Stuff

It’s been a while since I looked for some OS updates for the POV.

I was surprised here is already an ICS 4.0.3 version for the POV out there.

If you interested take a look at tabletroms.com

Speed and stability are great,…. notably the speed :-)

WIFI and Market are working out of the box.

have fun

Mario

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