Re: [lwip-users] Ethernet/UART bridge

[Andrew Foster]

Hi Andy,

You could try using "tcpip_callback". This would give you an 
asynchronous hook back into your data_send function.

On 04/18/2012 07:47 AM, address@hidden wrote:
> Hi All,
>
> I'm creating a simple program that enables a serial device to be communicated 
> with over ethernet. The comms is two way. It is running on an NXP LPC1768 and 
> I'm using LWIP 1.3.2 Raw API.
>
> The microcontroller acts as a server, listening for TCP connections. Once a 
> connection is established, on receipt of data, the TCP payload is buffered, and 
> then sent out over the serial port.
>
> My problem is how to transfer data from the serial port to the tcp connection. 
> The only solution I can think of so far is to use tcp_poll to check if any 
> buffered serial data is present and then to use tcp_write followed by 
> tcp_output to send it back to the client.
>
> Is this a valid use to tcp_poll?
>
> As all my handling of lwip is executed from a single thread, can I call 
> tcp_write from my own function that is called at a faster rate than tcp_poll 
> supports?
>
> Many thanks for your help
>
> Andy
>
>
>
>
>
>
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