--- /dev/null
+This tool extracts firmware from the driver that comes
+with the Hantek DSO-2xxx/52xx series USB oscilloscopes. Find the 32-bit
+driver installed on the windows system -- typically called DSOxxxx1.sys or
+DsoxxxxX861.sys, where xxxx is your device's model. Use it like this:
+
+$ sigrok-fwextract-hantek-dso Dso2090X861.sys
+saved 4730 bytes to hantek-dso-2090.fw
+
+Copy the resulting file over to the location where sigrok installed its
+firmware files. By default this is /usr/local/share/sigrok-firmware.