RE: Bridging

[Kevin Hawkins]

Hi Paul -

Ahh ! I suppose in an RS232 world that is exactly what should happen
but I can see where it comes from. Does your message then loop endlessly ??

Just on another point we are having a bit of a 'brainstorm' on BSC
right at this very moment and it may end up being a bit different from my
original document on that subject - we are hoping to roll in some extra
functionality here. Inparticular I would keep clear of the 'compound'
status
messages / control (anything involved with the 00 UID) - but I suspect
you're not using them too much now with one input and output. It may change
but I think whatever you do here would stand you in good stead for whatever
comes out as definitive. You can regard the current BSC as a test/trail
schema.

Just out of interest - how much codespace, Ram and Flash are you
using - and (being lazy) what are the capabilities of the 629 in this
respect ?

> -----Original Message-----
> From: Paul Barrett [mailto:<a
href="/group/xAP_developer/post?postID=xlvIEuCT_Rp_v9K2zqLiNtfO-aTxkIoVeOG9drQmUQyhP1lYDKjppvFznJ0oqZO3iTRacjGrFwulOwQVzuQxGK4f">pbarrett@r...</a>]
> Sent: 13 March 2004 12:02
> To: <a
href="/group/xAP_developer/post?postID=ZDx_SA83bATZQlc4u1tFLyniTK0U0UX4ri3z16uk4cBb9uu7BAtHYV7GWT2vwJ7WrJWzhrSJMjZPefQN0lHjtjodipa_">xAP_developer@xxxxxxx</a>
> Subject: [xAP_developer] Bridging
>
> Hi All
>
> As I was working on my xAP-485 Bridge and Serial library I
> found that I couldn't test it as there was no traffic on
> the serial bus.
> So I have now made my first xAP-485 node which is a basic
> 1 input, 1 output module running on a PIC12F629 which
> implements most of the BSC.
>
> Now that I have traffic on my serial network I through
> together a quick bridge xAPp which repeats the messages
> from one network to the other.
>
> My problem now is that messages received from the serial
> network and repeated on the Ethernet then get received by
> the bridge and repeated again onto the serial network.
>
> Stuart is there a way within your framework to determine
> if a message was previously received from the serial
> interface and therfore not retransmit it.
>
> If this dosn't make any sense let me know and I'll try to
> clarify what I getting at.
> Any suggestions welcome
>
> Thanks
> Paul