RCM3700 refuses to serXputs("+++");

Hi there,

as the title says, my RCM3700 refuses to put "+++" (Hayes escape-sequence or "return to AT-interface"-sequence).
I've successfully put up a PPPlink with my GPRS provider, but when I want to terminate the link, the serial-spy reads only one + at most.
I'm setting up the interface through ifconfig(/*...*/), set IFS_PPP_MODEMESCAPE to 1 (also tried 0), and after I want to detach i send (delay)+++(delay) directly to the port, just to be sure. The rabbit simply refuses to put all three of the pluses. Is there something I should be aware about here?

Thanks in advance,

Yasja S. de Miranda
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You cannot use the serial port driver and the PPP driver at the same time. They both want control of the transmit interrupt (and receive). You send your first "+" then the transmit interrupt fires, but it gets handled by the PPP driver, so the next serial characer is never loaded.

--- In r..., yasja@... wrote:
>
> Hi there,
>
> as the title says, my RCM3700 refuses to put "+++" (Hayes escape-sequence or "return to AT-interface"-sequence).
> I've successfully put up a PPPlink with my GPRS provider, but when I want to terminate the link, the serial-spy reads only one + at most.
> I'm setting up the interface through ifconfig(/*...*/), set IFS_PPP_MODEMESCAPE to 1 (also tried 0), and after I want to detach i send (delay)+++(delay) directly to the port, just to be sure. The rabbit simply refuses to put all three of the pluses. Is there something I should be aware about here?
>
> Thanks in advance,
>
> Yasja S. de Miranda
>

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Hi Joey,

Thanks for your quick reply. Is it so that i have to serXclose(); the port after i've sent the configuration commands (e.g. AT+CGDCONT stuff) and let the PPP driver take over? And if so, IFS_PPP_MODEMESCAPE to 1? If that's the case I know just what i've done wrong and it sounds so obvious.

Thanks in advance,

Yasja S. de Miranda
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Not sure what you are trying to do exactly.

To set-up the PPP session, just set the PPP control string IFS_PPP_SENDEXPECT. The PPP stack will handle all the initialization for you.

If you are trying to break into an existing session, you must re-open (serXopen) the port to reinstall the interrupt handles. This will remove PPP handlers.

--- In r..., yasja@... wrote:
>
> Hi Joey,
>
> Thanks for your quick reply. Is it so that i have to serXclose(); the port after i've sent the configuration commands (e.g. AT+CGDCONT stuff) and let the PPP driver take over? And if so, IFS_PPP_MODEMESCAPE to 1? If that's the case I know just what i've done wrong and it sounds so obvious.
>
> Thanks in advance,
>
> Yasja S. de Miranda
>

Start a New Thread