STTY help

[PQPGuy]

All,

I'm new to serial devices, and I want to migrate from a Windows-based serial terminal to either minicom or moserial. To do so, I need to mimic the settings of that Windows terminal. These settings are:

Flow Control Support: manual - RTS / DTR can be set or reset manually. CTS / DSR lines are displayed, but not used for synchronization. They are all unset, in my particular case.
Communication mode: Send/Receive
Baud rate: 115200
Parity: None
Parity Error Char: Ignore
Data Bits: 8
Stop Bits: 1

What is the coresponding stty command for this?

My serial device is FT232RL.

Many thx.

[eccerr0r]

You should set those parameters within minicom as minicom would overwrite any setting that you set.
In fact I think when the serial port is closed, many of the settings are reset...

[NeddySeagoon]

PQPGuy,

Your FT232RL is a USB to Serial converter. When your kernel support is in place, it will appear as /dev/ttyUSB*.
Normally, only root can set serial port parameters. Add yourself to the group that your /dev/ttyUSB* is in.
Here, its uucp.

Whatever the serial port is, set that up in minicom. Minicom will remember the settings.

Connect the serial port Tx and Rx lines together. This is called loopback.
Anything that you type into minicom will be echoed back to you.
Once that works, you can try talking to another device.

[PQPGuy]

eccerr0r, NeddySeagoon,

This is what confuses me. On Windows, the serial device works with these and only these settings (see above). Thus, the only choice, as I see it, is to mimic them in minicom which I don't know well enough.

Many thanks.

[eccerr0r]

In minicom, you use command-o and then use arrow keys to select serial port setup.

The "command" sequence could be control-a, esc, or meta- (alt-) depending on how your minicom is set up. If you're running straight in an xterm, likely alt-o will work; but it may be control-a o, or esc o depending on your terminal or settings. You may be able to force using your meta key by starting minicom with -m .

In any case minicom will print out what mode it is when you first start it up, if it says "Press Meta-Z for help on special keys" and meta-z works, then you should be able to also use meta-o.

Now if you're running in gnu screen...

[NeddySeagoon]

PQPGuy,

minicom won't start unless it can find your serial port.
Its start screen is

Code: Select all

Welcome to minicom 2.7

OPTIONS: I18n 
Compiled on Jun 12 2017, 18:19:11.
Port /dev/ttyUSB0

Press CTRL-A Z for help on special keys

CTRL-A Z (two separate keypresses shows

Code: Select all

Welco+-------------------------------------------------------------------+
     |                      Minicom Command Summary                      |
OPTIO|                                                                   |
Compi|              Commands can be called by CTRL-A <key>               |
Port |                                                                   |
     |               Main Functions                  Other Functions     |
Press|                                                                   |
     | Dialing directory..D  run script (Go)....G | Clear Screen.......C |
     | Send files.........S  Receive files......R | cOnfigure Minicom..O |
     | comm Parameters....P  Add linefeed.......A | Suspend minicom....J |
     | Capture on/off.....L  Hangup.............H | eXit and reset.....X |
     | send break.........F  initialize Modem...M | Quit with no reset.Q |
     | Terminal settings..T  run Kermit.........K | Cursor key mode....I |
     | lineWrap on/off....W  local Echo on/off..E | Help screen........Z |
     | Paste file.........Y  Timestamp toggle...N | scroll Back........B |
     | Add Carriage Ret...U                                              |
     |                                                                   |
     |             Select function or press Enter for none.              |
     +-------------------------------------------------------------------+

Its playing at popup windows :)
You need

Code: Select all

cOnfigure Minicom..O

so press 'o'
This gets you

Code: Select all

             +-----[configuration]------+                                  
            | Filenames and paths      |                                  
            | File transfer protocols  |                                  
            | Serial port setup        |                                  
            | Modem and dialing        |                                  
            | Screen and keyboard      |                                  
            | Save setup as dfl        |                                  
            | Save setup as..          |                                  
            | Exit                     |                                  
            +--------------------------+ 

Down arrow to

Code: Select all

Serial port setup 

and press return/enter and you set all the things from your original post.

Code: Select all

OPTI+-----------------------------------------------------------------------+
Comp| A -    Serial Device      : /dev/ttyUSB0                              |
Port| B - Lockfile Location     : /var/lock                                 |
    | C -   Callin Program      :                                           |
Pres| D -  Callout Program      :                                           |
    | E -    Bps/Par/Bits       : 115200 8N1                                |
    | F - Hardware Flow Control : Yes                                       |
    | G - Software Flow Control : No                                        |
    |                                                                       |
    |    Change which setting?                                              |
    +-----------------------------------------------------------------------+

You need entries A, E, F and G.

[szatox]

I personally found minicom very clunky. Fortunately, screen did the trick for me.
So you may want to try this:
screen /dev/ttyUSB0 115200
or something along the lines of this:
screen /dev/ttyUSB0 115200,cs8,-cstopb