> > On Monday, February 27, 2012 4:28:46 PM UTC-5, Gett wrote: >> >> I'm trying to use an FTDI USB chip on Android following the >> instructions at: >> >> http://www.ftdichip.com/Android.htm >> >> http://www.ftdichip.com/Support/Documents/TechnicalNotes/TN_134_FTDI_Android_D2XX_Driver.pdf >> >> > > >> The problem is that when I launch the D2XXSample app, the number of >> devices detected when I click the "Info" button is always 0. >> > > >> I'm working with Android 2.3.4. >> > > Are you working on an android device that is known to have usb host > capability, and has a host (or OTG) driver in its kernel and has decided to > go into usb host mode? >
The most important thing you haven't mentioned is the android device you are testing on. Some thing you could try: - first search to see if anyone else has done usb host work with the android device in question - use a voltmeter to verify the FTDI chip is powered - many pre-official-usb-host-support android devices aren't capable of providing this - adb pull, uncompress, and examine /proc/config.gz to see what options your kernel was compiled with - run dmesg from the adb shell shortly after a host usage attempt (or even during it with a terminal app) and see if there's any mention of a new usb device -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
