Pic to Pic communication - Electronic Circuits Projects Diagrams Free

neelam29 · 10th May 2008, 10:39 AM

Hi all
i want to design a project in which i want to make to and fro communication between 2 pic microcontrollers . both are PIC16f684.
want to use either 1 wire or 2 wire to communicate.Please help me how to proceed .
thanks

**Nigel Goodwin** · 10th May 2008, 11:42 AM

Just use serial communications, on either one pin, or two pins - with two pins you can use the hardware USART's, with one pin you need to use software ones.

**3v0** · 10th May 2008, 11:48 AM

What language ?

neelam29 · 10th May 2008, 04:11 PM

thanks nigel..but wht software u mean to say if i use 1 pin...i dont wanna go for uart.. please explain in detail..i couldnt get ur point

**Nigel Goodwin** · 10th May 2008, 04:18 PM

If you use one pin you have to keep switching them from input to output, which you can easily do in software - normally both PIC's would be set as inputs, to send data one would switch to output, send the data, then switch back to an input and wait for the reply. The second PIC, havng received the data, would switch to be an output, and send the reply back to the first, then return to being an input.

You need to decide exactly what you want to do, and how you want to do it.

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10th May 2008, 10:39 AM	(permalink)
neelam29	Pic to Pic communication Hi all i want to design a project in which i want to make to and fro communication between 2 pic microcontrollers . both are PIC16f684. want to use either 1 wire or 2 wire to communicate.Please help me how to proceed . thanks

10th May 2008, 11:42 AM	(permalink)
Nigel Goodwin	Just use serial communications, on either one pin, or two pins - with two pins you can use the hardware USART's, with one pin you need to use software ones. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

10th May 2008, 11:48 AM	(permalink)
3v0	What language ? __________________ search engine for electronic parts Junebug USB PIC programmer kit., USB Bit Wacker, Homepage The 15 Minute Printed Circuit Board! (+drill time)

10th May 2008, 04:11 PM	(permalink)
neelam29	thanks nigel..but wht software u mean to say if i use 1 pin...i dont wanna go for uart.. please explain in detail..i couldnt get ur point

10th May 2008, 04:18 PM	(permalink)
Nigel Goodwin	If you use one pin you have to keep switching them from input to output, which you can easily do in software - normally both PIC's would be set as inputs, to send data one would switch to output, send the data, then switch back to an input and wait for the reply. The second PIC, havng received the data, would switch to be an output, and send the reply back to the first, then return to being an input. You need to decide exactly what you want to do, and how you want to do it. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk