https://www.hackerspace-ffm.de/wiki/index.php?title=Processing250kBaud&feed=atom&action=historyProcessing250kBaud - Versionsgeschichte2024-03-28T09:19:47ZVersionsgeschichte dieser Seite in Hackerspace FfmMediaWiki 1.25.3https://www.hackerspace-ffm.de/wiki/index.php?title=Processing250kBaud&diff=6436&oldid=prevTut am 14. Januar 2014 um 19:04 Uhr2014-01-14T19:04:14Z<p></p>
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<td colspan='2' style="background-color: white; color:black; text-align: center;">← Nächstältere Version</td>
<td colspan='2' style="background-color: white; color:black; text-align: center;">Version vom 14. Januar 2014, 19:04 Uhr</td>
</tr><tr><td colspan="2" class="diff-lineno" id="L2" >Zeile 2:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Several USB-to-serial converter chips are capable of using non-standard baud rates. The chips from FTDI are just one example. However, using those baud rates especially under Linux is often cumbersome. Fortunately, most modern Linux distributions have already kernel support for those chips and baud rates. But accessing those rates from other applications especially Processing (here 1.5.1) doesn't gave the correct results. We found that the modern language Python makes things more easy - here custom baud rates worked out of the box. But this is not the end of the story: Once set a custom baud rate using a small Python script, this baud rate could also used afterwards under Processing. To work with 250kBaud under Processing, we first executed the following script once (called it set250k.py):</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Several USB-to-serial converter chips are capable of using non-standard baud rates. The chips from FTDI are just one example. However, using those baud rates especially under Linux is often cumbersome. Fortunately, most modern Linux distributions have already kernel support for those chips and baud rates. But accessing those rates from other applications especially Processing (here 1.5.1) doesn't gave the correct results. We found that the modern language Python makes things more easy - here custom baud rates worked out of the box. But this is not the end of the story: Once set a custom baud rate using a small Python script, this baud rate could also used afterwards under Processing. To work with 250kBaud under Processing, we first executed the following script once (called it set250k.py):</div></td></tr>
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<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><<del class="diffchange diffchange-inline">code</del>></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><<ins class="diffchange diffchange-inline">pre</ins>></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>#!/usr/bin/python</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>#!/usr/bin/python</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>import serial</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>import serial</div></td></tr>
<tr><td colspan="2" class="diff-lineno" id="L13" >Zeile 13:</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>ser.close() # close port</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>ser.close() # close port</div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div></<del class="diffchange diffchange-inline">code</del>></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div></<ins class="diffchange diffchange-inline">pre</ins>></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Then we could use it also under Processing using code like this:</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Then we could use it also under Processing using code like this:</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"></td></tr>
<tr><td class='diff-marker'>−</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><<del class="diffchange diffchange-inline">code</del>></div></td><td class='diff-marker'>+</td><td style="color:black; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><<ins class="diffchange diffchange-inline">pre</ins>></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>import processing.serial.*;</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>import processing.serial.*;</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Serial SerialPort;</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>Serial SerialPort;</div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>SerialPort = new Serial(parent, "/dev/ttyUSB0", 250000);</div></td><td class='diff-marker'> </td><td style="background-color: #f9f9f9; color: #333333; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #e6e6e6; vertical-align: top; white-space: pre-wrap;"><div>SerialPort = new Serial(parent, "/dev/ttyUSB0", 250000);</div></td></tr>
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</table>Tuthttps://www.hackerspace-ffm.de/wiki/index.php?title=Processing250kBaud&diff=6435&oldid=prevTut: Die Seite wurde neu angelegt: „== Non-standard baud rates under Linux / Processing == Several USB-to-serial converter chips are capable of using non-standard baud rates. The chips from FTDI are…“2014-01-14T19:01:45Z<p>Die Seite wurde neu angelegt: „== Non-standard baud rates under Linux / Processing == Several USB-to-serial converter chips are capable of using non-standard baud rates. The chips from FTDI are…“</p>
<p><b>Neue Seite</b></p><div>== Non-standard baud rates under Linux / Processing ==<br />
Several USB-to-serial converter chips are capable of using non-standard baud rates. The chips from FTDI are just one example. However, using those baud rates especially under Linux is often cumbersome. Fortunately, most modern Linux distributions have already kernel support for those chips and baud rates. But accessing those rates from other applications especially Processing (here 1.5.1) doesn't gave the correct results. We found that the modern language Python makes things more easy - here custom baud rates worked out of the box. But this is not the end of the story: Once set a custom baud rate using a small Python script, this baud rate could also used afterwards under Processing. To work with 250kBaud under Processing, we first executed the following script once (called it set250k.py):<br />
<br />
<code><br />
#!/usr/bin/python<br />
import serial<br />
<br />
# grab serial port data from FTDI chip<br />
ser = serial.Serial(port='/dev/ttyUSB0', baudrate=250000, rtscts=True)<br />
ser.open()<br />
#c=ser.read(5)<br />
#print c<br />
<br />
ser.close() # close port<br />
</code><br />
<br />
Then we could use it also under Processing using code like this:<br />
<br />
<code><br />
import processing.serial.*;<br />
Serial SerialPort;<br />
SerialPort = new Serial(parent, "/dev/ttyUSB0", 250000);<br />
</code></div>Tut