Perhaps you enabled hardware handshake on your serial line. (Flow control: http://en.wikipedia.org/wiki/Serial_port#Flow_control).
So the hyperterminal responds on that handshake and the transmission starts. You should disable FlowControl in your application. Roy 2012/9/24 Christian Cadon <silis.electroni...@gmail.com> > > Hello, > > We are a design office electronics. > We develop some applications to interact with our electronic cards (update, > configuration, management, etc. ..). Bluetooth is the technology currently > used for this task. We now want to communicate via USB. > We develop an application "test" shipment via USB, the content of EditText > when pressing a button and displays what you get in a TextView. We helped > http://developer.android.com/guide/t.../usb/host.html > and > http://android.serverbox.ch/?p=549 # comments > but we do not use arduino but a simple interface USB/RS232 where the RX and > TX are connected and we check the result with an oscilloscope. > We also have our tablet (Iconia A500) hyperterminal Slick USB 2 Serial Demo. > > Here is our problem: > Our application works only if we have previously opened the hyperterminal. In > fact, if we run our application directly, the code works correctly, and okay > until the sending function "bulkTransfert" (which returns the size of datas > to send) but sending does not occur (check on the oscilloscope). > But when the previously opened hyperterminal, sending is successful. > And when the application sends nothing (when it should) and you open the > hyperterminal then we get our bytes sent on this one. > We believe that open hyperterminal or authorizes the things we do not. > > Do you have an idea of what is missing in our program? > > -- > 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 -- 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
