Coulomb Counter I2C clock calibration

calibrate.sh

#!/usr/bin/env bash
set -e -o pipefail

BUS="1"
ADDRESS="0x42"
TIME=2

calibrate() {
	local mode=$1
	local time=$2
	local hextime="$(printf '%016X' "$((time * 1000000000))")"

	local reg=15
	echo "$hextime" | fold -w 2 |  while read byte; do
		i2cset -y $BUS $ADDRESS $reg 0x$byte
		reg=$((reg + 1))
	done

	# Set calibration register to calibrate $mode
	i2cset -y $BUS $ADDRESS 14 $mode

	sleep $time

	# Set calibration register to finish calibration
	i2cset -y $BUS $ADDRESS 14 0

	sleep 1

	# Check if calibration was successful (should be 0)
	i2cget -y $BUS $ADDRESS 14
}

echo "Calibrating timer1 ..."
calibrate 1 10

echo "Calibrating WDT ..."
calibrate 2 10