Basic Stamp for RS232 baud rate convertor
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Posts: 46,084
Derek-
A Stamp is the wrong tool for this job--not enough memory to even
begin to meet your buffer requirements. In theory you could kludge
something together using external RAM...
Sounds like a job for your PC or some dedicated device designed for
this purpose.
Steve
On 24 Jan 01 at 9:16, Derek Bristow wrote:
> ...I have a requirement to connect two pieces of equipment (a test
> instrument and a fixed baud rate radio modem) via a RS232
> connection. The problem is that the instrument can only
> communicate at 9600 baud and does not use the control lines (DSR,
> DTR, RTS and CTS). The modem can only communicate at a maximum of
> 4800 baud, but can accept data at 9600 baud! The modem only has a
> 1KB buffer, and thus buffer over-runs occur most of the time.
>
> I need a small unit that will connect to the instrument at 9600,
> accept incoming data, buffer it (at least 8Kbyte), and play it out
> at 9600 or 4800, but taking cognisance of the RTS/CTS control lines.
>
> Is this easy and feasable to implement with a Stamp or similar?
A Stamp is the wrong tool for this job--not enough memory to even
begin to meet your buffer requirements. In theory you could kludge
something together using external RAM...
Sounds like a job for your PC or some dedicated device designed for
this purpose.
Steve
On 24 Jan 01 at 9:16, Derek Bristow wrote:
> ...I have a requirement to connect two pieces of equipment (a test
> instrument and a fixed baud rate radio modem) via a RS232
> connection. The problem is that the instrument can only
> communicate at 9600 baud and does not use the control lines (DSR,
> DTR, RTS and CTS). The modem can only communicate at a maximum of
> 4800 baud, but can accept data at 9600 baud! The modem only has a
> 1KB buffer, and thus buffer over-runs occur most of the time.
>
> I need a small unit that will connect to the instrument at 9600,
> accept incoming data, buffer it (at least 8Kbyte), and play it out
> at 9600 or 4800, but taking cognisance of the RTS/CTS control lines.
>
> Is this easy and feasable to implement with a Stamp or similar?