Main Site Documentation

Com2 & com3


#1

Hello, I would like to know more about serial ports. I have read there were maximum 4 available on Domino.
COM4 is available through UEXT as said in FEZ Domino board documentation.
COM1 is just Di0 and Di1
But what about COM2 & COM3? I could not find documentation about them.
Thanks!


#2

Please post domino questions on “domino” board instead of “general discussions”

Domino has 3 not 4 COM ports. See this please http://www.tinyclr.com/downloads/Domino/Broch_FEZ_Domino.pdf


#3

OK, sorry, next time I’ll post this kind of question on “Domino” forum. Right now I continue on this one if you don’t mind.
So, OK, 3 COMs only (and it is already very good). But where is the 3rd COM?
1st = Di0, Di1
2nd = UEXT
3rd = ?
This is not explained in the documentation (or I don’t use the right search)


#4

Tx3 is on JP1 pin 8 Di8 and Rxd3 is on JP1,5 Di4…

Just download the schematic from the same place.
http://www.tinyclr.com/downloads/Domino/FEZDomino_sch.pdf

Then you can check all pins connected to the MPU (pin 66 / 67 )

Cheers Ian


#5

Did you look at link? :slight_smile:
It shows you how to get com4


#6

@ Gus… Do you have to re-map txd3 / rxd3?

Or can you use Di4 & Di8!!

Cheers Ian


#7

You can find the answer here:

http://www.tinyclr.com/forum/2/347/


#8

[quote]@ Gus… Do you have to re-map txd3 / rxd3?

Or can you use Di4 & Di8!!

Cheers Ian
[/quote]

COM4 is very special on our processor! It is connected to 3 places. By default, we use COM4 on pins 4.28 and 4.29. See this http://www.tinyclr.com/downloads/Domino/FEZDomino_sch.pdf

Now, those pins are not exposed on FEZ Domino but no to worry, you can get COM4 by remapping pins as explained in brochure (you will use 2 of the analog pins) http://www.tinyclr.com/downloads/Domino/Broch_FEZ_Domino.pdf

You can also remap it to pins 0.0 and 0.1 if you like. These are the same pins as CAN so you will lose one of the CAN channels. I recommend you stick with the brochure.

Not to forget that you can connect many USB<->serial cables to Domino’s USB host port :wink:


#9

Thank you for your answers.
It is clearer now (and in particular remapping)