there are many adapters from USB to printer port , based on PROLIFIC's chip PL-2305 (USB to IEEE 1284 Bridge Controller ) . Windows reports this as an virtual printer port . How can i use this adapter in programming microcontrollers in same manner as a classical printer port LPT1 or LPT2 ?
thanks .
I have tried to use a USB to paralled convertor but it seems that you cannot do that. THe reason is that the new virtual paralled port does nor have a generic LPT I/O address which the programmer looks for.
I have tried to use a USB to paralled convertor but it seems that you cannot do that. THe reason is that the new virtual paralled port does nor have a generic LPT I/O address which the programmer looks for.
But usually many of programming S/W is using direct port I/O through PORTIO, or WINIO, In that case those programming S/W cannot ustilize the USB-to-LPT virtual port.
Most serial ports on USB that I have seen are quite transparent and they are undistinguishable for any software. But LPT does seem to be somewhat crooked.
you can use the USB2LPT device,this device is developed in 2006,this device have USB2.0 high speed,this device can vitual a LPT2 or LPT3 in "com and LPT" leaf,detail information you can login http://www.jeease.com in chinese