Parallel port to SPI?

[gangmei]

I want to be able to use PC's parallel port to communicate with SPI interface of microcontrollers. I searched the web and could not find a very good solution. It could be a off-the-shelf small board with software.

Anyone can help me on this?

Thanks in advance.

 

[nbucska]

You can use e.g. <

http://www.jameco.com>

's $19.95 #155660
bidirectional parallel interface card.



<nbucska@pcperipherals.com>

 

[gangmei]

From my understanding, this board you mentioned is a ISA board providing parallel port. What I need is a small board connected to my PC's parallel port providing SPI interface.

 

[rlandry]

try

http://www.google.com

and do a search for 'spi interface'. I found a couple that have some source code and or schematics. Most I've seen are serial port driven.

 

[tinkosong]

i have done 1 project using parallel port to mcu spi line...

i use visual basic....but other also can...

what you have ti do is..

1. assign the parallel port with spi specs..eg:
pin 2(D0) = reset
pin 3(D1) = mosi
pin 4 (D2)= sck
pin x (s0)= miso -->cannot remamber the status portarallel port input by defaut.

then..

2.write a program to send and receive from spi line...bit by bit.

eg:

for i=0 to 32
outport (data,binary:00000010);sck = 0
outport (data,binary:00000010);sck = 1

miso =inport (status)and binary:00000001
next i

but before you can transmit....must have a function to convert data you have into 8 bit parallel port,bit by bit...

 

[Kido]

you could just use a paralell to serial converter such as what you can get from tandy few dollars and you can use the 5v power rail in your computer for the supply, reduces curcuitry, you say serial input in the question so i presume you only want to go from the computer to your m/c if you want bi-directional communication this complicates things lots, it would be eisier to go and buy a serial card for your pc, you can get pci cards for about AU$60

 

[RichAdams]

I have just designed an SPI to Parallel interface board which i am about to make up in volume. Did you get anywhere finding anything suitable?

Richard