The software supports four different modes of data display: table view, line view, dump and terminal views. (This did not light up on my laptop with the non-working USB to serial adapter.Advanced features offered by Serial Port Monitor Then if the break is working, the BREAK light in the far right column should light up for a moment. If you only have a laptop and a USB to serial adapter and want to test it, click on the 'Pins' tab of the RealTerm terminal program, then click on the '500ms Break' button. It sent the break as discussed in the above Stamp document. I could send a break signal either direction.Īnd I ran the Stamp identify function from the Stamp Editor and sent that to RealTerm on the other desktop PC. I also tested this between two desktop PC's. (Some serial cables do not have all pins connected, thus you can't see all the signals like RTS, CTS, DTR, DSR, etc.)īreak could be sent from my desktop, but not received by the laptop. Then connected both computers with a fully wired null serial cable. I tested this by installing RealTerm on the laptop with the USB to serial adapter and on a desktop computer. The break condition cannot be emulated! It may seem that transmitting a series of binary 0s will achieve the same effect, however, doing so will still result in each byte being followed by a stop bit effectively dropping the line low every 1.04 ms.'Īnyway my USB to Serial adapter is not sending the break signal like it should! Everything else seemed to be working as it should. This is an exception case to the normal use of the transmit pin. 'A “break” condition is a feature of the RS-232c serial protocol where the transmit pin (TX) is set high for a duration longer than the byte-period of the selected baudrate. control codes sent).īreak is a hardware thing.And I mean NIFTY! This terminal program shows all the signals including Break. Then I found a NIFTY serial terminal program (for free) called RealTerm. The above document shows that the DTR signal needs to be pulsed and at the same time a Break signal sent. It is called 'BASIC Stamp Programming Protocol' and can be found here. I found the technical documentation for the stamp identify and programming (Run) specifications. (I've ordered a known working adapter from Parallax.) I bought a Staples USB to Serial adapter and it did not work with the Stamp.

Realterm windows 10