programs work differntly when laptop connected
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Posts: 46,084
Hi,
I see odd behavior when I have my laptop connected to the RS232
interface (p1-p4). Programs only run when I have a debug statement
in the program. When the BS2q is connected to my desktop, all is
well.
I know little of RS232. However, I got out my voltmeter and found
that on my laptop the voltage between GRD and TX in +6V. On my
desktop the voltage difference in -7V. Is there a problem with the
com port on my laptop? What is the correct voltage?
My laptop is a Dell Latitude.
Thank
John O
I see odd behavior when I have my laptop connected to the RS232
interface (p1-p4). Programs only run when I have a debug statement
in the program. When the BS2q is connected to my desktop, all is
well.
I know little of RS232. However, I got out my voltmeter and found
that on my laptop the voltage between GRD and TX in +6V. On my
desktop the voltage difference in -7V. Is there a problem with the
com port on my laptop? What is the correct voltage?
My laptop is a Dell Latitude.
Thank
John O