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[/] [w11/] [tags/] [w11a_V0.61/] [tools/] [bin/] [set_ftdi_lat] - Rev 8
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#!/bin/sh
# $Id: set_ftdi_lat 282 2010-04-24 12:08:32Z mueller $
#
# Usage: sudo $HOME/other/retro/trunk/bin/set_ftdi_lat USB0 1
#
# Revision History:
# Date Rev Version Comment
# 2010-04-24 282 1.0 fix filename for retrieving old latency
# 2010-04-24 281 0.9 Initial version
#
dev=${1:-USB0}
lat=${2:-1}
file="/sys/bus/usb-serial/devices/tty$dev/latency_timer"
if [ ! -r $file ]
then
echo "set_ftdi_lat-E: device $dev not available"
echo " $file not found"
exit 1
fi
if [ ! -w $file ]
then
echo "set_ftdi_lat-E: parameters for $dev not writable"
exit 1
fi
old=`cat $file`
echo "Set latency for tty$dev: old=$old new=$lat"
echo "$lat" > $file
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