Many printers make use of the RTS/CTS lines which is pretty easy to implement.
#WHAT IS A PARALLEL TO SERIAL CONVERTER SERIAL#
So you might check what kind of handshake the serial printer can handle. It depends on the serial printer, if there is a handshake required on the serial side. If STROBE* = low then goto WaitForStrobeHigh If SerialTransmit Done then goto WaitForTxDone Pass byte variable to a serial transmitter VP to send it to the serial printer Read D0.D7 from the port into a byte variable If STROBE* = high then goto WaitForStrobeLow So, here is a rough scheme for a simple parallel to serial conversion in kinda BASIC dialect: Where "O" means output, and "I" means input (when you "look" into the PC's parallel port). Parallel to Serial must be easier than that.ĭealing with an "old", or "classical" Centronics parallel port is not really difficult. How do you handle flow control, what about the roughly 10 parallel lines that seem to go the wrong way, from printer to computer?Īn intriguing problem, any comments would be welcome.įrom South Africans where we communicate in 11 different official languages.
#WHAT IS A PARALLEL TO SERIAL CONVERTER SOFTWARE#
The circuit can’t be too difficult, but the software frightens me. Someone has just caught up with me on the shop floor and said “Bond, you’re into electronics, why not just make a parallel to serial converter?” Well…
One used to be able to buy a converter but everything is USB there days and the “Western disposal culture” dictated that we just chuck perfectly good stuff away because it doesn’t have a USB V2.0 sticker on it. We have some old test equipment in our factory that uses Centronics parallel printer ports, unfortunately, we have standardized on (equally old) serial label printers.
We want to run a serial printer off a parallel port. Has anyone got the code for a Parallel to serial converter?
0 kommentar(er)
