ic7100ctl

#!/usr/bin/env bash
devpath=/dev/serial/by-id/usb-Silicon_Labs_CP2102_USB_to_UART_Bridge_Controller_IC-7100_03005210_A-if00-port0
orig_settings=$(stty -F "${devpath}" -g)

if [ $# -ne 1 ]; then
	echo "Usage: $0 up|down" >&2
	exit 1
fi

case "$1" in
up)
	stty -F "${devpath}" 19200 raw -echo -icanon
	xxd -r -p <<< "FEFEFEFEFEFEFEFEFEFEFEFEFEFEFEFEFEFEFEFEFEFEFEFEFEFEFEFE88E01801FD" | cat > "${devpath}"
	sleep 4
	# Synchronize time from computer
	date "+FEFE88E01A050120%Y%m%dFD" | xxd -r -p > "${devpath}"
	sleep 1
	date "+FEFE88E01A050121%H%MFD" | xxd -r -p > "${devpath}"
	sleep 1
	;;

down)
	stty -F "${devpath}" 19200 raw -echo -icanon
	xxd -r -p <<< "FFFE88E01800FD" | cat > "${devpath}"
	;;

*)
	echo "Unrecognised option \"$1\"." >&2
esac


stty -F "${devpath}" "${orig_settings}"