https://www.rtems.org/bugzilla/show_bug.cgi?id=2185
Bug #: 2185
Summary: Enhance rtems_termios_puts to write more than one char
at once
Classification: Unclassified
Product: RTEMS
Version: HEAD
Platform: All
OS/Version: RTEMS
Status: NEW
Severity: enhancement
Priority: P3
Component: cpukit
AssignedTo: [email protected]
ReportedBy: [email protected]
Created attachment 1568
--> https://www.rtems.org/bugzilla/attachment.cgi?id=1568
Patch for termios.c as described
The rtems_termios_puts(), as is, calls (*tty->handler.write)() once per char.
To minimize overhead e.g. with DMA setup in driver, it could send more at once.
The attached patch implements a quite simple loop for copying more than one
char before calling (*tty->handler.write)().
Note that it does *not* enable interrupts while copying as suggested by the
comment in the original source code.
The amount of chars copied however is guaranteed to be less than rawOutBuf
size.
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