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circuit to interface an IEEE 1284 parallelport — Parallax Forums

circuit to interface an IEEE 1284 parallelport

StefanL38StefanL38 Posts: 2,292
edited 2010-08-20 12:26 in General Discussion
Hello,

I would like to know with what kind of circuit (using some logic chips or not)
could be used to interface the propeller to a device that is usually driven by a parallelport from a PC.

The attached schematic shows how the transeiver should look like.
The resistance-values are not clearly stated to me.

I also attach a PDF about the parallelinterface

thank you in advance

best regards

Stefan
Parallelport-IEEE-12-84.png
663 x 492 - 24K
pdf
pdf
Parallelport-IEEE-1284.pdf
46K

Comments

  • kwinnkwinn Posts: 8,697
    edited 2010-08-11 15:35
    For simple hardware (parallel printer etc.) '595 and '597 chips work well. for more complex devices (external HDD or CD/DVD, etc) something more may be required. I have run an old Okidata 182 printer from the prop using 1 '595 and 1 '597. Never tried anything more complex.
  • Invent-O-DocInvent-O-Doc Posts: 768
    edited 2010-08-18 07:17
    I thought about this, but isn't the 1284 parallel interface +12/-12 volt like old school RS-232 voltages?
  • Mike GreenMike Green Posts: 23,101
    edited 2010-08-18 07:44
    No, the IEEE 1284 parallel port is a 5V logic interface. That's why it was so useful for microcontroller programmers.
  • John R.John R. Posts: 1,376
    edited 2010-08-18 07:47
    The DIY CNC type sites may be of help. Many of the systems use the parallel port to drive the stepper motor drivers. (easy to maniuplate multiple pins)
  • Invent-O-DocInvent-O-Doc Posts: 768
    edited 2010-08-20 12:26
    OOohh. Thanks mike. I've been thinking about debugging my micro with an old daisy wheel printer or old dot-matrix for fun.
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