#!/bin/sh
# DS2482-100 Single Channel 1-Wire Master


CONFIG=0xf0
if [ "${1}" = overdrive ]; then
	CONFIG=0x78
fi

vusb-i2cset 0x18 0xf0 || echo "Failed to reset chip"
vusb-i2cset 0x18 0xd2 $CONFIG || echo "Failed to set config"
vusb-i2cset 0x18 0xb4 || echo "Failed to initiate presence detection (OWR)"

ret=$(( $(vusb-i2cget 0x18 1 0xe1 0xf0) & 0x02 ))

if [ "${ret}" = 0 ]; then
	echo "No presence detected"
	exit 1
fi

vusb-i2cset 0x18 0xa5 0x33 || echo "failed to issue READ ROM"

vusb-i2cset 0x18 0x96 || echo "failed to initiate read"
b8=$(vusb-i2cget 0x18 1 0xe1 0xe1)
vusb-i2cset 0x18 0x96 || echo "failed to initiate read"
b7=$(vusb-i2cget 0x18 1 0xe1 0xe1)
vusb-i2cset 0x18 0x96 || echo "failed to initiate read"
b6=$(vusb-i2cget 0x18 1 0xe1 0xe1)
vusb-i2cset 0x18 0x96 || echo "failed to initiate read"
b5=$(vusb-i2cget 0x18 1 0xe1 0xe1)
vusb-i2cset 0x18 0x96 || echo "failed to initiate read"
b4=$(vusb-i2cget 0x18 1 0xe1 0xe1)
vusb-i2cset 0x18 0x96 || echo "failed to initiate read"
b3=$(vusb-i2cget 0x18 1 0xe1 0xe1)
vusb-i2cset 0x18 0x96 || echo "failed to initiate read"
b2=$(vusb-i2cget 0x18 1 0xe1 0xe1)
vusb-i2cset 0x18 0x96 || echo "failed to initiate read"
b1=$(vusb-i2cget 0x18 1 0xe1 0xe1)

printf "%02X%02X%02X%02X%02X%02X%02X%02X\n" $b1 $b2 $b3 $b4 $b5 $b6 $b7 $b8