Monthly Archives: October 2007

DTR-based PC to SX flow control is now enabled and working, thanks to jd2xx. It has been tested, and SX responds appropriately to a STOP request. Strangely, with the new jd2xx code, it doesn’t appear that flow control is even … Continue reading →

Okey dokey. I’ve changed from rxtx to jd2xx.  rxtx didn’t support DTR/DSR flow control, which really is an absolute must for my application.  There would have to be hardware changes that I’d be unwilling to make to accomodate anything else … Continue reading →

I’ve gotten away thus far without any flow control. I just started noticing that my software was locking up occasionally when reading a disk. It was locking up in the “read” portion of the code because it wasn’t receiving enough … Continue reading →

I put up a rough schematic of my design.  It’s not perfect, and will be updated in the near future, but if you are interested. Click the image below for a full size image.

As I alluded in an earlier post(s), my SX28 has been pretty warm. After doing a number of different tests, I’ve now ordered an infrared thermometer from amazon for $29.99. I want to find out exactly how hot this thing … Continue reading →

Although I’m transmitting from the Parallax SX microcontroller to the PC via USB at a data rate of 2mbps, the actual throughput is much less.  First, there is some overhead, namely start and stop bits, which is 25%.  Next, I … Continue reading →

As I mentioned before, I’m using RXTX to do serial communication in Java since Sun has dropped support for serial communication under the Windows platform.  I want to revamp my read routines on the java side because they are ugly.  … Continue reading →

Tonight I’ve finally got around to adding a config file option so that you don’t have to keep selecting a comport to open.  It also remembers your “number of retries” before skip options. Simply little editable text file. I’ve got … Continue reading →