I tried this "USB gender changer" and the voltage levels seem to go just about right:
normal pc usb port ================== black GND green 0V white 0V red +5V freerunner as device ==================== black GND green 0V white 0V red 0V freerunner as host ================== black GND green 0V white 0V red +4.98V However, usb devices don't seem to work. Even the simplest USB extension cable with LED does not turn its LED on. Any idea how I should debug this further? I am using echo "host" > /sys/devices/platform/s3c2410-ohci/usb_mode echo "1" > /sys/devices/platform/neo1973-pm-host.0/hostmode from http://wiki.openmoko.org/wiki/Neo_1973_USB_host to turn host mode on and the following rootfs and kernel: http://buildhost.openmoko.org/daily/freerunner/200807/20080722/Openmoko-openmoko-devel-image-glibc-ipk-P1-Snapshot-20080722-om-gta02.rootfs.jffs2 http://buildhost.openmoko.org/daily/freerunner/200807/20080730/uImage-2.6.24+git25+8533927964761f4e2078ccd8607b90f5acc60b93-r1 -om-gta02.bin Maybe the ID pin in the openmoko usb cable somehow causes trouble? _______________________________________________ Openmoko community mailing list [email protected] http://lists.openmoko.org/mailman/listinfo/community
