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tools: improve reliability of ttyopen()

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Previously, communications with my RC2014 would always be rocky and
fail most of the time. By sending an CR at init, things go much
smoother.
This commit is contained in:
Virgil Dupras 2020-09-17 10:25:08 -04:00
parent 1a6a549857
commit a19c814b0d
1 changed files with 5 additions and 0 deletions
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5
tools/common.c
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@ -149,6 +149,11 @@ int ttyopen(char *devname)
set_interface_attribs(fd, 0, 0); set_interface_attribs(fd, 0, 0);
set_blocking(fd, 0); set_blocking(fd, 0);
mempty(fd); mempty(fd);
// Communication with device is much more reliable if we
// begin by sending, asynchronously, a CR to make sure we
// empty any pending stuff on all sides.
write(fd, "\r", 1);
mempty(fd);
set_blocking(fd, 1); set_blocking(fd, 1);
return fd; return fd;
} }