Allow device-*.sh file to flash to be specified without '-f'

bin/device-update.sh

@@ -5,7 +5,7 @@ PYTHON=${PYTHON:-$(which python3 python|head -n 1)}
 # Usage info
 show_help() {
 cat << EOF
-Usage: ${0##*/} [-h] [-p ESPTOOL_PORT] [-P PYTHON] -f FILENAME
+Usage: $(basename $0) [-h] [-p ESPTOOL_PORT] [-P PYTHON] [-f FILENAME|FILENAME]
 Flash image file to device, leave existing system intact."
 
     -h               Display this help and exit
@@ -37,6 +37,11 @@ while getopts ":hp:P:f:" opt; do
 done
 shift "$((OPTIND-1))"
 
+[ -z "$FILENAME" -a -n "$1" ] && {
+    FILENAME=$1
+    shift
+}
+
 if [ -f "${FILENAME}" ]; then
 	echo "Trying to flash update ${FILENAME}."
 	$PYTHON -m esptool --baud 921600 write_flash 0x10000 ${FILENAME}