quick question on Nuts & Volts #125 (Control from your favorite terminal)

basicstampede

Hello,

In N&V 125, Figure 125.1 shows SX28 connected to MAX232 chip which is then connected to PC's DB-9 COM port.

Judging by the schematics of Prof. Dev. Board, I think I can just connect my PC's COM port to the X-13 (RS232) connect on PDB.·

And I would use my PC's USB port (using USB to COM adapter) to program the SX28 on PDB.

Is my assumption correct?

Thanks.· ·

basicstampede

excuse my typo. I meant to write above:

Judging by the schematics of Prof. Dev. Board, I think I can just connect my PC's COM port to the X-13 (RS232) connector on PDB.

JonnyMac

Yes, I do it all the time. The pin on the PDB marked RX is from the PC, the pin marked TX is to the PC.

basicstampede

JonnyMac,

Accoridng to PDB schematic, pin 7 of MAX232 chip is connected to PIN 8 of DB9-F, whereas Fig 125.1 of the article has Pin 7 of MAX232 chip connected to Pin 2 of DB9-F connector.

So, if I just connect X-13 connector to my PC, will it really work?

Thanks.

JonnyMac

Connect the DB-9 (associated with X13) to your PC.
Connect X-13.RX to your SX chip

The schematic from that article is not from the PDB -- you are (yet again) making things more difficult than they actually are....

basicstampede

Jonny Mac, thank you! It works!

One minor thing I noticed is that when I type a command (such as "v"), I don't see "V" appear on my hyperterminal. I see that it took it because it displays as expected on hyperterminal.

Is there some setting that I need to do so that I can see what I am typing on hyperterminal?

Thanks.

JonnyMac

Hyperterminal lets you echo characters typed: Properties --> Settings (tab) --> ASCII Setup

basicstampede

Excellent. This is a fascinating program. Thank you for the excellent article.