S
Simon
- Jan 1, 1970
- 0
Hello -
I'd like to be able to measure the baud rate that a couple of sealed devices
are using to talk to each other over a serial (RS232) cable. I know that
they only use the common baud rates 9600, 19200, etc.
Can anybody give me some pointers on a circuit I could build that I could
daisy chain with the serial cable to do this? A digital readout would be
nice, but an analogue dial or set of LEDs would do. Or perhaps even a
circuit that generates an audio tone at a frequency that is some fraction of
the baud rate, and the tone could be compared to a set of reference tones
(or even tuning forks) by the user.
I'd like to build something cheap, compact and simple, rather than buying a
hardware or software protocol analyser.
I'd like to be able to measure the baud rate that a couple of sealed devices
are using to talk to each other over a serial (RS232) cable. I know that
they only use the common baud rates 9600, 19200, etc.
Can anybody give me some pointers on a circuit I could build that I could
daisy chain with the serial cable to do this? A digital readout would be
nice, but an analogue dial or set of LEDs would do. Or perhaps even a
circuit that generates an audio tone at a frequency that is some fraction of
the baud rate, and the tone could be compared to a set of reference tones
(or even tuning forks) by the user.
I'd like to build something cheap, compact and simple, rather than buying a
hardware or software protocol analyser.