QtSerialPort and CPU usage
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My colleague found another usb-to-serial cable (USB-SERIAL CH340 wch.cn). It works perfectly.
When I debugged with the old cable it seemed to loop in qevendispatcher_win.cpp:770 for loop. With the old cable I got from two to eight readyRead-signals (message length about 16 bytes). With this "new" cable, just single signal with whole data.
Thanks for your help.
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Please try to fix the code in the source code library QtSerialPort to test, as described "here":https://bugreports.qt-project.org/browse/QTPLAYGROUND-2 and take there is an example of an "attached":https://bugreports.qt-project.org/secure/attachment/28890/TestSerial.zip for testing.
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I tried this fix. The problem still occurs. I used my own code for testing.
For second try I put debug print to that event-function. I guess it was called "few" times, because then qt creator jammed too :)
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Bad bad bad. I do not have ideas how to fix it.
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UPD: Please try repeat test with new test tool "CpuUsageTester":https://bugreports.qt-project.org/secure/attachment/28899/CpuUsageTester.zip
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It works exactly same way with this test application.
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Clear, thx
So, most likely a problem in the drivers.
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2 Dolbyz,
Please check CPU load with a new concept from "here":https://codereview.qt-project.org/#change,32186
PS: If you have free time.
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I'll try to test during this week.
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With this version I could not reproduce the 100% CPU usage-bug.
At least previously it happened almost immediately. Now I tried for some time, but no issues.