#!/bin/zsh

addr=0x4f
cmd=$1
arg=$2

function read_temp {
	typeset buf

	buf=($(vusb-i2cget $addr 2 $1))

	printf "%.2f\n" $(( buf[1] + (buf[2] / 256.) ))
}

function set_temp {
	typeset buf1 buf2 reg=$1 num=$2

	buf1=${num%.*}
	if [[ $buf1 == $num ]]; then
		buf2=0
	else
		buf2=128
	fi

	vusb-i2cset $addr $reg $buf1 $buf2
}

case $cmd in
	get_temp)
		read_temp 0
		;;
	get_hyst)
		read_temp 2
		;;
	get_os)
		read_temp 3
		;;
	set_hyst)
		set_temp 2 $arg
		;;
	set_os)
		set_temp 3 $arg
		;;
esac