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Updated Troubleshooting (mediawiki)

kai-morich 2020-09-06 17:25:11 +02:00
parent 7c5f6151d3
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Troubleshooting.mediawiki

@ -46,7 +46,7 @@ For example, to receive a 100 byte string, you might read 64 bytes, then 36 byte
* Newline-terminated messages: Read until you see a <code>\n</code> (or any other "terminal" character). * Newline-terminated messages: Read until you see a <code>\n</code> (or any other "terminal" character).
== I observed <code>read</code> ''data loss'' with continuous transfer at high baud rates == == I observed <code>read</code> data loss with continuous transfer at high baud rates ==
Android is not a real time OS. The thread responsible for receiving data might not be scheduled by the OS or garbage collection might be ongoing or … Android is not a real time OS. The thread responsible for receiving data might not be scheduled by the OS or garbage collection might be ongoing or …
Therefore data loss can happen for continues read at high baud rates. If data is lost, typically some smaller fragments in the middle of the data are missing. Therefore data loss can happen for continues read at high baud rates. If data is lost, typically some smaller fragments in the middle of the data are missing.
@ -55,7 +55,7 @@ This effect is more likely for slower Android device and USB devices with smalle
Using a higher thread priority (default for <code>SerialInputOutputManager</code> since ''usb-serial-for-android v3.1.0'') and offloading work from <code>onNewData</code> to other threads can mitigates the issue. Using a higher thread priority (default for <code>SerialInputOutputManager</code> since ''usb-serial-for-android v3.1.0'') and offloading work from <code>onNewData</code> to other threads can mitigates the issue.
''Data loss'' can also occur with inappropriate buffer size, as shown in next Question. Data loss can also occur with inappropriate buffer size, as shown in next Question.
== How to size the <code>read</code> buffer? == == How to size the <code>read</code> buffer? ==