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tools: improve stty-related advices in README

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Virgil Dupras 2020-08-02 16:21:31 -04:00
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tools/README.md
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@ -12,7 +12,7 @@ properly set up, TTY-wise. You'll probably want to do that with `stty`. The tool
itself takes care of setting the regular stuff (`cs8`, `-parenb`, etc), but you itself takes care of setting the regular stuff (`cs8`, `-parenb`, etc), but you
need to set the speed. Here's an example working on OpenBSD: need to set the speed. Here's an example working on OpenBSD:
$ ( stty 115200 raw ; ./upload - a000 os.bin ) <>/dev/cuaU0 $ ( stty 115200 raw ; sleep 2 ; ./upload - a000 os.bin ) <> /dev/cuaU0
To be honest, I'm having a bit of troubles making these tools work as well on To be honest, I'm having a bit of troubles making these tools work as well on
OpenBSD as they do in Linux. But it *does* work. Here are some advices: OpenBSD as they do in Linux. But it *does* work. Here are some advices:
@ -20,6 +20,10 @@ OpenBSD as they do in Linux. But it *does* work. Here are some advices:
* Use `cuaXX` instead of `ttyXX`. * Use `cuaXX` instead of `ttyXX`.
* Run `cu -l /dev/cuaXX` before running your tool and run a dummy command to * Run `cu -l /dev/cuaXX` before running your tool and run a dummy command to
make sure that the output buffer is flushed. make sure that the output buffer is flushed.
* Use the "raw" option to avoid TTY-processing options to mess with data.
* If you experience random failures in your command, try inserting a "sleep 2"
between your "stty" invocation and the command. In my experience, these tend
to help.
On Linux, it's generally easier: On Linux, it's generally easier: