I am using version 9. An occasional life saver.
Hello:
I bought a USB-to-paralell DB25F converter, just to command an old project who was operating on standard paralell port. when I plug it in my laptop, I don't have a new port added in "Ports (COM & LPT)" of device manager, I just have a new "USB printing support" in the "Universal Serial Bus controllers". Also, no new port added in printers ports. So could this converter be used to control an external hardware and how?
In fact, I intended to command it by C++ using "inpout51.dll"
Thanks
Gabrialle
Please, tell us about the internal structure of an Electron.
www.physicsforums.com/showthread.php
Define rhetoric question.
en.wikipedia.org/.../Rhetoric_question
but nobody helps me.
Where is _your_ thread with any question relating to Keil?
I don't know the capabilities of inpout51.dll, but note that a USB printer adapter is not hardware-compatible with an internal printer port. The driver supplied normally don't have function calls to set individual bits. The driver supports sending large blocks of data through the USB interface to the external hardware. The handling of handshake bits may not even be possible to control by the driver - the controller on the other side would most probably handle everything - all it gets is a block of data, and then it sends it to the printer, or reports back a timeout.
Next issue is that if the driver and hardware do support toggling of individual bits (instead of having the toggling happening in the controller on the other side of the USB interface) then the latencies in the USB transfer will result in very slow operation.
In the end, you should consider using other external equipment. Best is to use newer equipment using USB directly, or at least using a serial port since USB-to-serial normally works quite well.