This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
OK, I'm working on a Motorola i730, which implements midp 2.0. I need to open a serial connection (which i've done) ala
then I need to open both an input and an output stream, which is easy enough:
here's the tricky part: I need to have both streams running simultaneously. This is for a custom device I'm building. The output stream is used to send voltage to a NAND gate, which when closed disallows all i/o, so the OutputStream must be sending data in order for the InputStream to work. I have tried as many configurations as I can think of, and I'm running out of ideas. Any help would be greatly appreciated. I've included my latest attempt (this is in a commandAction method, for testing) below:
No error msg, just that I cannot do a simultaneous read/write. As soon as I do a read, the OutputStream shuts down, along with the InputStream, and the CommConnection, and even if I exit the loop (in order to test the receipt of data) any state changes I have (calling methods, appending to a form or repainting a canvas are what I've tried) never occur, even though the code is outside of any I/O loops. Jason
Joined: Jan 22, 2004
Well, I figured it out, finally. For some reason when the i730 is transmitting data OUT, the IN line no longer sees +3V As a '1', it sees '0' until around +4V. We're still trying to figure it out, make sure its not something we're doing. Any thoughts would be appreciated. Jason
Joined: Mar 07, 2002
Thansk for sharing this, Jason, Have you tried to contact Motorola's support people?