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Discussion Groups | BasicX | Serial Communication Help Need

Discussion forum for the BasicX family of microcontroller chips.

Serial Communication Help Need - Giuliano Taddeo - Mar 17 10:24:10 2008

Great Guru's,
I'm trying to test a serial connection between a BasicX24 and a PC-Hyperterminal.
I'm using a max232 as RS232 Interface but nothing is shown on the hyperterminal! Tryed to hook up the scope on pin 14 (max232 t1out) and what I see is just a positive square waveform pattern; I guss the negative side of the waveeform is missing.. By cheching on pin 2 and 6 I get +8.50V and -8.50V so looks fine havin' pin 16 with pin 21 of BasicX24 (5V) .
Anybody of you guys has a suggestion for me?
Thanks in advance

Giuliano - Italy

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Re: Serial Communication Help Need - rosa...@aol.com - Mar 17 14:54:43 2008


Hi,

Double check your connections. My computer using Hyper terminal show at the BX24 pin 1, reads zero pin 2 read -9.5 and pin 3 reads -9.5 and pin 4 is ground. Sometime you have to jump 4 and 5 together and 8? and 20 also at the computer end. If not the port can get locked. If you do not use these pins you should jumper together. Normal practices when connecting communications devices.

rosarite

-----Original Message-----
From: Giuliano Taddeo
To: b...@yahoogroups.com
Sent: Mon, 17 Mar 2008 7:55 am
Subject: [BasicX] Serial Communication Help Need

Great Guru's,

I'm trying to test a serial connection between a BasicX24 and a PC-Hyperterminal.

I'm using a max232 as RS232 Interface but nothing is shown on the hyperterminal! Tryed to hook up the scope on pin 14 (max232 t1out) and what I see is just a positive square waveform pattern; I guss the negative side of the waveeform is missing.. By cheching on pin 2 and 6 I get +8.50V and -8.50V so looks fine havin' pin 16 with pin 21 of BasicX24 (5V) .

Anybody of you guys has a suggestion for me?

Thanks in advance

Giuliano - Italy

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]
------------------------------------



(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )

Re: Serial Communication Help Need - Giuliano Taddeo - Mar 18 7:47:37 2008

Guru's,
I got it done!!
Was using the wrong cable(had to use a null modem to go directly in the computer) and a condenser was upside down.
Now everything is working just fine.
thanks Rosarite for your support.
Giuliano

----- Original Message -----
From: r...@aol.com
To: b...@yahoogroups.com
Sent: Monday, March 17, 2008 7:35 PM
Subject: Re: [BasicX] Serial Communication Help Need

Hi,

Double check your connections. My computer using Hyper terminal show at the BX24 pin 1, reads zero pin 2 read -9.5 and pin 3 reads -9.5 and pin 4 is ground. Sometime you have to jump 4 and 5 together and 8? and 20 also at the computer end. If not the port can get locked. If you do not use these pins you should jumper together. Normal practices when connecting communications devices.

rosarite

-----Original Message-----
From: Giuliano Taddeo
To: b...@yahoogroups.com
Sent: Mon, 17 Mar 2008 7:55 am
Subject: [BasicX] Serial Communication Help Need

Great Guru's,

I'm trying to test a serial connection between a BasicX24 and a PC-Hyperterminal.

I'm using a max232 as RS232 Interface but nothing is shown on the hyperterminal! Tryed to hook up the scope on pin 14 (max232 t1out) and what I see is just a positive square waveform pattern; I guss the negative side of the waveeform is missing.. By cheching on pin 2 and 6 I get +8.50V and -8.50V so looks fine havin' pin 16 with pin 21 of BasicX24 (5V) .

Anybody of you guys has a suggestion for me?

Thanks in advance

Giuliano - Italy

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]

[Non-text portions of this message have been removed]
------------------------------------



(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )