question in dealing with LPT IO pins

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asrock

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hello every one


i have a question about reading lpt data that PIC control them ,
& i made a software to read from lpt ,,, but the issue in connecting PIC with lpt !


i mean >>> can i connect LPT pins directly to PIC pins (such as PORTA) ?!!

or are there any equipments that i must connect before ?

i use PIC16f877 & MikroC ,,,

so any one here can help me with any schematic plz

gratings
 

HTA said:
Maybe this thread will give you some help to find out: https://www.edaboard.com/threads/273541/

Enjoy your design work!
Click to expand...


thanks a lot mr.HTA for ur link

here i draw a schematic how to change the pin1 of lpt as PIC rb0 ,,

when i trigger bc337 , the state of pin1 is "1" , else state is "0"

So is this schematic right?? ,, i don't test it in fact ,but i would know if it is right ,,

what's is your opinion ?
 

Hi Asrock,

Pin 2 of the printer port is an output and if you want to generate an interrupt signal on PIC rbo it need to drive the base of the transistor via a resistor to limit the current. The collector should e connected via a resistor to 5V and drive the PIC rb0 input.

Enjoy your design work!
 

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