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== https://es.technikum-wien.at/openlab/openlab_wiki/wikis/home[Home] | https://es.technikum-wien.at/openlab/openlab_wiki/wikis/sig_proc_UI_source[<OpenLab-Printed Circuit Boards - Signal Processing Hardware (U/I-Source)] | https://es.technikum-wien.at/openlab/openlab_wiki/wikis/RTS_theory[Real Time Sampling - Theory>]
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== https://es.technikum-wien.at/openlab/openlab_wiki/wikis/home[Home] | https://es.technikum-wien.at/openlab/openlab_wiki/wikis/SignalToolkit_logic[<OpenLab SignalToolkit - Logic Analyzer] | https://es.technikum-wien.at/openlab/openlab_wiki/wikis/misc[Miscellaneous>]
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Students who attend a study program dedicated to technical
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OpenLab attaches great importance to suggestions of design
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sciences, are often required to analyze embedded communication
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and development improvements. Therefore, every measurement
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interfaces, measure duty cycles of rectangular signals or
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tool has an integrated feedback tool which is divided
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test the digital inputs and outputs. In order to complete these
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into an individual feedback and a questionnaire, illustrated in
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tasks, it is advantageous to have a logic analyzer. As part of
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Figure 1.
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the research process, courses at the university were precisely
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analyzed. The result of this analysis is represented in Table V.
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The OpenLab Signal Toolkit offers a logic analyzer measurement
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device. Figure 1 shows the block diagram of the logic analyzer hardware platform.
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... | @@ -19,27 +14,33 @@ image::https://es.technikum-wien.at/openlab/openlab_wiki/wikis/img/sig_proc_logi |
... | @@ -19,27 +14,33 @@ image::https://es.technikum-wien.at/openlab/openlab_wiki/wikis/img/sig_proc_logi |
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This hardware add-on communicates
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The questionnaire contains general questions about the
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via USB with the PC application, which is described
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utilized measurement application, usability, and developed
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in section IX-E. Hence, the hardware consist of a powerful
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hardware. The individual feedback section allows the user
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microcontroller LPC1837 [2] from NXP [1], which is a
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to mention specific suggestions or problems which are not
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Cortex-M3 based µC. Based on the USB high-speed connection
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covered by the questionnaire. Therefore, problems and bugs
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the sample data are transferred to the PC application.
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can be eliminated efficiently. Currently, only the OpenLab
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This µC provides an internal USB bootloader, which makes
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oscilloscope was handed out for students and lectures. The received
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it easier for students to perform a firmware upgrade. This
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feedback contained, iter alia, improvement suggestions
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computation performance of the µC is required, because the
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regarding the implementation of a detailed help menu, and
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sample frequency is 10 MHz and no external RAM should
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the integration of additional measurements, such as FFT (Fast
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be used. The absence of an external memory reduces the
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Fourier Transformation). Furthermore, students and lectures
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costs significantly. A current limitation and an input ESD
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recommended to improve the hardware design, because the
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(Electrostatic Discharge) protection circuit, protects the µC.
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design suffered from too high noise at low input voltage
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Additionally, the hardware platform provides 8 logic level
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levels. Thus, the help content was extended with detailed
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pins and connectors for typical embedded communication
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described pictures and an additional media center. The media
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interfaces. These inputs can be used as outputs as well. This
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center provides two videos to ensure an easier way to get
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means the logic analyzer can be configured to a pattern
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started with the measurement tools. The implementation of
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generator, and the hardware platform does not need to be
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the FFT was necessary, because the course ”Signal Processing
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changed. In pattern generation mode, students are able to
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& DSP-Programming” at the university needs to analyze
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define logic patterns, communication interface messages which
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the measured signal in the frequency domain. Moreover, the
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are applied to the outputs of the hardware platform.
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hardware was redesigned to reduce the noise level, described
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in subsection IV. The improvements which were applied to the
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OpenLab Oscilloscope are a good example, how the mentioned
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integrated feedback tool helps to improve every measurement
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application and hardware of the Signal Toolkit. Within the
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ongoing and upcomming academic years, various feeback
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evaluations will help to improve the OpenLab Signal Toolkit.
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... | @@ -50,4 +51,4 @@ are applied to the outputs of the hardware platform. |
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== https://es.technikum-wien.at/openlab/openlab_wiki/wikis/home[Home] | https://es.technikum-wien.at/openlab/openlab_wiki/wikis/sig_proc_UI_source[<OpenLab-Printed Circuit Boards - Signal Processing Hardware (U/I-Source)] | https://es.technikum-wien.at/openlab/openlab_wiki/wikis/RTS_theory[Real Time Sampling - Theory>] |
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== https://es.technikum-wien.at/openlab/openlab_wiki/wikis/home[Home] | https://es.technikum-wien.at/openlab/openlab_wiki/wikis/SignalToolkit_logic[<OpenLab SignalToolkit - Logic Analyzer] | https://es.technikum-wien.at/openlab/openlab_wiki/wikis/misc[Miscellaneous>] |
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