... | ... | @@ -8,36 +8,45 @@ The following excerpt of the research results shows a selection of devices which |
|
|
|
|
|
= Simple Logic Analyzer for PC
|
|
|
|
|
|
The Simple Logic Analyzer (SLA) shown in figure 1 is a 8-channel
|
|
|
measurement device capable of analyzing TTL- and CMOS
|
|
|
logic signals.
|
|
|
The Simple Logic Analyzer (SLA) shown in figure 1 is a 8-channel measurement device capable of analyzing TTL- and CMOS logic signals.
|
|
|
|
|
|
{empty} +
|
|
|
|
|
|
image::https://es.technikum-wien.at/openlab/openlab_wiki/wikis/img/SOTA_logic/SOTA_logic_sla.PNG[caption="Figure 1: ",title="Simple Logic Analyzer (1)",height=220,align="center"]
|
|
|
|
|
|
{empty} +
|
|
|
|
|
|
The measured signal first passes an input buffer which prepares the data for further processing. Communication with the PC application as well as signal capturing is done by a ATMega microcontroller. A standard RS232 interface is used for transferring data between the hardware and the GUI. This logic analyzer is able to sample at a maximum frequency of 2 MHz. The PC application is only available for windows operating systems. Schematics of the hardware, the microcontroller firmware as well as the PC application are open-source. The OpenLab Logic Analyzer has a communication protocol decoder as an additional feature. Students will be able to decode and generate SPI, I2C and UART data packets in order to verify their assignments.
|
|
|
|
|
|
{empty} +
|
|
|
|
|
|
== Open Workbench Logic Sniffer
|
|
|
|
|
|
The Open Workbench Logic Sniffer shown in figure 2 is a 32-channel measurement device and captures 50 MHz+ waveforms.
|
|
|
|
|
|
{empty} +
|
|
|
|
|
|
The measured signal first passes an input buffer
|
|
|
which prepares the data for further processing. Communication
|
|
|
with the PC application as well as signal capturing is done
|
|
|
by a ATMega microcontroller. A standard RS232 interface
|
|
|
is used for transferring data between the hardware and the
|
|
|
GUI. This logic analyzer is able to sample at a maximum
|
|
|
frequency of 2 MHz. The PC application is only available
|
|
|
for windows operating systems. Schematics of the hardware,
|
|
|
the microcontroller firmware as well as the PC application are
|
|
|
open-source. The OpenLab Logic Analyzer has a communication
|
|
|
protocol decoder as an additional feature. Students will be
|
|
|
able to decode and generate SPI, I2C and UART data packets
|
|
|
in order to verify their assignments.
|
|
|
image::https://es.technikum-wien.at/openlab/openlab_wiki/wikis/img/SOTA_logic/SOTA_logic_logicSniffer.PNG[caption="Figure 2: ",title="Open Workbench Logic Sniffer (2)",height=220,align="center"]
|
|
|
|
|
|
{empty} +
|
|
|
|
|
|
The logic analyzer from seeed has an USB interface and is USB powered, therefore a computer is needed for usage. The mempry depth has 3 different implementations:
|
|
|
|
|
|
* 8 channels with 16k sample depth
|
|
|
* 16 channels with 8k sample depth
|
|
|
* 32 channels with 4k sample depth
|
|
|
|
|
|
Another feature of the product is the external clock and trigger input which allows interfaces with external test equipment. This logic analyzer is open source and available for 50.00 dollars.
|
|
|
|
|
|
{empty} +
|
|
|
|
|
|
== Bibliography +
|
|
|
|
|
|
. Arkadiusz; Antoniak: _Simple Logic Analyzer (SLA)_ [Online] https://ep.com.pl/antoniak/index.php?id=sla
|
|
|
. seeed: _Open Workbench Logic Sniffer_ [Online] https://www.seeedstudio.com/preorder-open-workbench-logic-sniffer-p-612.html?cPath=61_68
|
|
|
. miniLa: _mini Logic Analyzer_ [Online] http://minila.sourceforge.net/
|
|
|
. instructables: _ARDUINOLYZER.JS: TURN YOUR ARDUINO INTO A LOGIC ANALYZER_ [Online] http://www.instructables.com/id/Arduinolyzerjs-Turn-your-Arduino-into-a-Logic-Anal/
|
|
|
. Vassilis Serasidis: _mini Logic Analyzer_ [Online] http://www.serasidis.gr/circuits/mini_logic_analyzer/miniLogicAnalyzer.htm
|
|
|
|
|
|
{empty} +
|
|
|
|
... | ... | |