Main > Main Forum

My serial LCD for displaying directions

<< < (25/39) > >>

Rawker:
maybe i should try that, the manual says the usb has a 5v and a gnd so i'll try hooking it up to that

edit: got it working, now to figure out how to send files to it

edit #2: i'm having trouble sending files to it, i tried everything in the thread and i can't seem to get anything to display on the screen. I know the screen works because i can adjust the screen's contrast level or brightness or whatever it is. anyways if anyone has the time to help me out my icq is 118287640 as i can't seem to figure out what the problem is.

i tried the stuff BobBorakovitz posted
configured the ports like maraxle said

i tried both of my comps and no luck and the only thing i can think of is that it's my cable which is http://www.radioshack.ca/estore/Product.aspx?language=en-CA&product=2600117&category=Parallel+%26+Serial&catalog=RadioShack

Rawker:
btw i get this error when trying copy test.txt com1 in >run>cmd> "The handle is invalid. 0 file(s) copied."

bump do you think i have to do this?

"but the cable is a 9 pin serial cable that allows pins 2, 3, and 5 to go straight through, connects pins 1, 4, and 6 together on the PC end, and connects 7 and 8 together on the PC end.  Pin 9 is unused.  The reason for connecting the pins together on the PC end is to ensure that it always has a DSR/DTR signal and a CTS/RTS signal.  This is not necessary on XP, however, as it appears to be more forgiving of the serial communications standards than DOS and Win98 are..."

maraxle:
What OS are you using?  If it's not XP (or maybe 2000, haven't tested), you need the custom cable.

Also, run a "mode" command before you try copying the file for the first time.  I think that's mentioned somewhere else in this thread too.

Rawker:
i'm running windows xp
i tried the "mode" command and here's what i got:

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\default>mode

Status for device LPT1:
-----------------------
    Printer output is not being rerouted.


Status for device COM1:
-----------------------
    Baud:            19200
    Parity:          None
    Data Bits:       8
    Stop Bits:       1
    Timeout:         ON
    XON/XOFF:        OFF
    CTS handshaking: ON
    DSR handshaking: OFF
    DSR sensitivity: OFF
    DTR circuit:     ON
    RTS circuit:     HANDSHAKE


Status for device COM2:
-----------------------
    Baud:            1200
    Parity:          None
    Data Bits:       7
    Stop Bits:       1
    Timeout:         OFF
    XON/XOFF:        OFF
    CTS handshaking: OFF
    DSR handshaking: OFF
    DSR sensitivity: OFF
    DTR circuit:     ON
    RTS circuit:     ON


Status for device CON:
----------------------
    Lines:          300
    Columns:        80
    Keyboard rate:  31
    Keyboard delay: 1
    Code page:      437


C:\Documents and Settings\default>copy desktop\test.txt com1
The handle is invalid.
        0 file(s) copied.

C:\Documents and Settings\default>

maraxle:
Hmmm...  My com1 looks like this:

Status for device COM1:
-----------------------
    Baud:            19200
    Parity:          None
    Data Bits:       8
    Stop Bits:       1
    Timeout:         OFF
    XON/XOFF:        OFF
    CTS handshaking: OFF
    DSR handshaking: OFF
    DSR sensitivity: OFF
    DTR circuit:     ON
    RTS circuit:     ON

If you can make yours look like that using some of the mode command line switches, you should have no problem.  If you type "mode /?" it'll give you a list of the available switches to try.  It'll end up looking something like this (all on one line):

mode com1: baud=19200 parity=n data=8 stop=1  dtr=on rts=on octs=off odsr=off

Navigation

[0] Message Index

[#] Next page

[*] Previous page

Go to full version