The phones usb port is not a guest when I plug my headset into it. It is when I plug my computer into it, but thats less of a guest / host situation and more like mutual devices chattering to it each other.
USB in just a serial bus at the end of the day. If one end has to be a host and the other a guest, this can change based on which configuration, non? It's not like USB are hardwired to be either host or guests, that's a progmatic thing, decided by the two devices in question. On Fri, Jul 10, 2009 at 7:10 AM, Tony Su <[email protected]> wrote: > > Unless someone can answer definitively based on the phone's technical > information, > > Based on observation only, it's not possible based on general USB > architecture. In any USB connection, one endpoint is designated the Host and > multiple guests can connect to that Host (IIRC theoretically 256 devices). > > Because the Phone can connect to the USB port of a computer, the computer > is always the Host and anything else that can connect is a Guest, so the > Phone's USB port is a Guest. > > A Sensor would also be a Guest so cannot connect to the Phone, it needs to > connect to a port configured as a Host. > > Tony > > ----- Original Message ----- > From: Mas <[email protected]> > Sent: Wed, 7/8/2009 12:12pm > To: Android Beginners <[email protected]> > Subject: [android-beginners] USB data acquisition > > > Hello, > > I am doing a feasibility study using an Android Dev phone. I want to > attach the phone using the USB cable (or the serial port) to a sensor. > In an application, I want to pole the sensor over the cable and have > the resultant value displayed on the screen. The interaction between > the sensor and the phone would involve the phone sending down a > request data byte and the sensor responding with the necessary data. > Is a data acquisition application of this nature possible on the > phone? > > Thank you for your time, > Mas > > > > > > --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Beginners" 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-beginners?hl=en -~----------~----~----~----~------~----~------~--~---
