From: sleeper75se (sleeper75se_at_yahoo.se)
Date: 2002-01-17 23:42:28
--- In buildcheapeeg_at_yahoogroups.com, Joel Eriksson <jen_at_ettnet.se> wrote:
Hi Joel,
> one wishes. Then only the multiplexer would have to be modified
> when someone wishes to make other interfaces (USB, Firewire, IrDA,
USB is a nice idea. I've looked into it, and if you use the default
HID-drivers, you don't need to write any device drivers of your own.
I could slap together a simple schematic using Philips PDIUSBD12 USB-
interface. On one end it talks USB, on the other it appears to talk
EPP (almost). Just connect the usb-port on one end and the parallel
port (with some adaptation logic) on the other. The rest would be
software.
The design is so simple I think it could be soldered on veroboard,
though the chip is surface mount.
Here are some good resources:
http://www.semiconductors.philips.com/pip/pdiusbd12d
<= Datasheet for the D12-chip.
http://www.devasys.com
<= Manufactures usb boards for developers.
http://www.usb-by-example.com
<= Companion site for a book with the same name. Lots of examples,
and source code. One example actually uses the philips chip I
mentioned. 8051-assembler knowledge a plus.
http://www.cypress.com/usb/ezusb_trm1-9.pdf
<= Technical reference for the EZ-USB chip used in usb-by-example. It
also explains the basics of USB in a way that is understandable.
Now, are there any takers for this project? I have zero time myself,
except for drawing the schematic... Joel? Doug? Anyone else?
/Andreas
This archive was generated by hypermail 2.1.4 : 2002-07-27 12:28:36 BST