Hi, I'm currently developing an app that needs USB Host implementation to communicate with a device to request data and settings. I'm testing with an Archos 80 G9 as platform, running Android 4.0.3 (latest firmware).
I can read and write from/to the device using the bulktransfer method on 2 endpoints: 1 for reading and 1 for writing. The device's USB is implemented correct, since I have no issues communicating with it using a python script. Writing is never a problem. However when I'm reading there allways comes a point where I can no longer read any data from the USB devices: bulktransfer keeps returning -1. I have tried different timeout values, adding delays, flushing the endpoint by reading until it's returning -1, implementing a Reader to use in combination with a BufferedReader, but nothing so far has solved the issue. The strange thing is that when I plug the device in the computer and run the python script, the data that should have been read in Android, is read without any issue, as it is still buffered by the USB device. So it appears that the issue is on the Android side. I hope someone can suggest some possible solutions, since I'm running out of ideas. The code can be found at http://code.google.com/p/oscdroid/ I'm sure it's pretty nasty and could be a lot better, but so far most functionality is working properly. Connection code is mainly in the ConnectionService class. I'd appreciate any suggestions. -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
