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

bin/device-install.sh

@@ -7,7 +7,7 @@ set -e
 # 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, but first erasing and writing system information"
 
     -h               Display this help and exit
@@ -39,6 +39,11 @@ 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 ${FILENAME}, but first erasing and writing system information"
 	$PYTHON -m esptool --baud 921600 erase_flash