8-bit MicrocontrollersのトピックRe: Needed help about KITUSBSPIEVME: USB to SPI INTERFACE

Needed help about KITUSBSPIEVME: USB to SPI INTERFACE

xdev — Sat, 08 Sep 2007 10:30:47 GMT

Dear All,

I want to design "USB to true EPP parallel port" project. I found similar product http://sewelldirect.com/QuatechParallelPCMCIACard.asp. Did KITUSBSPIEVME can do?

http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=KITUSBSPIEVME

*sorry for my bad english

Regards,

xdev

Re: Needed help about KITUSBSPIEVME: USB to SPI INTERFACE

fernandoanaut — Tue, 14 Jun 2011 08:17:14 GMT

Hola, como va....?

Queria saber si habias averiguado si la placa KITUSBSPIEVME, sirve para virtualizar el puerto paralelo. Tengo que realizar un proyecto en el cual debo virtualizar el puerto paralelo por USB, y el puerto virtualizado debe soportar los modos EPP y SPP. Espero una respuesta atentamente, y desde ya muchisimas gracias. Saludos

Fernando.

Re: Needed help about KITUSBSPIEVME: USB to SPI INTERFACE

Tsuneo — Wed, 15 Jun 2011 10:59:57 GMT

KITUSBSPIEVME doesn't satisfy your purpose, because its PC device driver doesn't provide any virtual parallel port on the PC side. The PC application accesses to the board over a custom DLL / device driver which derives from Thesycon USBIO.

What is your purpose of the virtual EPP/SPP port?

Making a custom device driver on PC side, you may get virtual EPP/SPP port on your PC. But even with this hard effort, the signal timing on the parallel port is not so well controlled by PC application. If you have a plan to connect a MCU programmer / JTAG pod to this parallel port, you'll meet with timing problems. You'd better to move to a MCU programmer / JTAG pod designed for USB connection.

If you have a plan to connect a printer or a printer-like device (for example, a CNC controller), USB printer class may work. In this topic on Microchip forum, we have implemented a USB printer device for Windows in-box Generic Printer driver.

USB printer class
http://www.microchip.com/forums/tm.aspx?m=491016

Tsuneo