Re: Inter-Character Delay

Russell King
2008-02-26T19:18:56Z

On Tue, Feb 26, 2008 at 01:21:18PM -0500, Robin Getz wrote:
> On Tue 26 Feb 2008 12:11, Russell King pondered:
> > On Tue, Feb 26, 2008 at 11:11:58AM -0500, Robin Getz wrote:
> > > ping.
> > >
> > > Comments appreciated.
> >
> > ascii-xfr does inter-line and inter-character delays without requiring
> > any kernel modifications - used it with some dumb boot loaders which
> > required 'mem deposit <word>' to be sent slowly to the target.
>
> Thanks for the pointer.
>
> Solving the problem in userspace (with tcdrain and udelay) when some
> hardware can do the same thing with zero overhead - doesn't seem like
> the most efficient way to do things....

I know of no serial hardware which can insert arbitary delays inbetween
characters.

> It also lacks the ability to work with pre-existing user space
> applications.

So one could say those applications are buggy.

--
Russell King
Linux kernel 2.6 ARM Linux - http://www.arm.linux.org.uk/