add ds2482-100-searchrom (onewire SEARCH ROM)

1 files changed, 41 insertions, 0 deletions

diff --git a/commandline/examples/ds2482-100-searchrom b/commandline/examples/ds2482-100-searchrom
new file mode 100755
index 0000000..db478e7
--- /dev/null
+++ b/commandline/examples/ds2482-100-searchrom
@@ -0,0 +1,41 @@
+#!/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 $CONFIG || echo "Failed to set config"
+vusb-i2cset 0x18 0xb4 || echo "Failed to initiate presence detection (OWR)"
+
+ret=$(( $(vusb-i2cget 0x18 0xe1 0xf0) & 0x02 ))
+
+if [ "${ret}" = 0 ]; then
+	echo "No presence detected"
+	exit 1
+fi
+
+vusb-i2cset 0x18 0xa5 0xf0 || echo "failed to issue SEARCH ROM"
+
+reply=
+
+for i in $(seq 1 8); do
+	byte=0
+	for j in $(seq 0 7); do
+		vusb-i2cset 0x18 0x78 0x00 || echo "failed to send triplet"
+
+		bit=$(vusb-i2cget 0x18 0xe1 0xf0)
+
+		if [ "${bit}" -ge 80 ]; then
+			byte=$((byte | (1 << j)))
+		fi
+		echo -n .
+	done
+	reply="$(printf '%02X' "${byte}")${reply}"
+	echo -n +
+done
+
+echo "\n${reply}"