Hi,
As a continuation to my earlier mail...
Where do you call tcpServer_send ??
In tcpecho_raw_init function you call function tcp_new_ip_type I am not
familier with this function ?
My init function looks like this:
struct tcp_pcb *Listening_pcb; // is define static global
void TcpTermInit(u16 TcpTermPort)
{
struct tcp_pcb *pcb;
err_t err;
pcb = tcp_new();
if(pcb != NULL)
{
// bind local IP with our port
err = tcp_bind(pcb, IP_ADDR_ANY, TcpTermPort);
if(err == ERR_OK)
{
// The tcp_listen() function returns a new connection control block, and
// the one passed as an argument to the function will be deallocated. The
// reason for this behavior is that less memory is needed for a
connection
// that is listening, so tcp_listen() will reclaim the memory needed for
// the original connection and allocate a new smaller memory block for
the
// listening connection.
Listening_pcb = tcp_listen(pcb);
// if we are here that mean that we did not use all available connection
// and we are ready to treat another one.
tcp_setprio(Listening_pcb, TCP_PRIO_MIN);
tcp_accept(Listening_pcb, tcp_term_accept);
}
else
{
/* abort? output diagnostic? */
}
}
else
{
/* abort? output diagnostic? */
}
}
BR,
Noam.
From: lwip-users [mailto:lwip-users-bounces+noam=silrd....@nongnu.org] On
Behalf Of Julio Cesar Aguilar Zerpa
Sent: Monday, October 31, 2016 11:00 AM
To: Mailing list for lwIP users
Subject: Re: [lwip-users] Tcp Server on Texas Instrument RM57
Hi Noam,
Thank you for helping me.
1. First of all are you running with an OS or without?
I am using the RM57 Microprocessor -> without OS
2. Secondly do you understand that with RAW API you should not call any LwIP if
the call is not from within the LwIP own context?
That is a very important point that I didn't know about! So, then how
should I send data? How do I initialize the pbuf pointer?
3. As far as I see you are not copying the data into the new buffer. How is the
send itself? does the function tcpecho_raw_send copying the data to the buffer?
Yes, you are right. I noticed that. I then tried it with "TEST_DATA" as
global. Same problem (but at least the data was correct at tcpecho_raw_send)
4. The code is just partial so I cannot see the picture
You can see the code if you have the examples. It's the 'tcpecho_raw'. I
will attach it just in case you don't have it. I made some minor modifications
to check if there's a connection and also added the function already described.
(Again: the 'echo' part works -> received data is being sent back correctly,
but sending data that wasn't received is not working)
5. Secondly check if tcp_write uses the copy mode into an internal buffer or
use a reference to data.
Yes, it uses the copy mode.
I also tried to send the data using the 'tcp_write' function directly instead
of calling tcpecho_raw_send and it returned error -11 (no connection) but was
receiving and sending data over the callbacks.
It appears your second statement is one of the reason my program is not
working. I don't have any current docu, do you have any?
How do I send data? Is there another example that receives data over callbacks
and is able to send data created on its own memory space?
Best regards,
Julio
Am 29.10.2016 um 02:04 schrieb Noam Weissman:
Hi,
First of all are you running with an OS or without ?
Secondly do you understand that with RAW API you should not call any LwIP
if the call is not from within the LwIP own context ?
As far as I see you are not copying the data into the new buffer. How is the
send itself ?
does the function tcpecho_raw_send copying the data to the buffer ?
RAW API means that everything you do is in the same context. If you block on
the function
tcpecho_raw_send and/or do something that takes too much time yes the data will
not properly
handled.
The code is just partial so I cannot see the picture.
I would start with setting your uint8 data[] = "TEST_DATA"; to static OUTSIDE
of the function. This way
it will not change when you exit from the function.
Secondly check if tcp_write uses the copy mode into an internal buffer or use a
reference to data.
BR,
Noam.
________________________________
From: lwip-users
<lwip-users-bounces+noam=silrd....@nongnu.org><mailto:lwip-users-bounces+noam=silrd....@nongnu.org>
on behalf of Julio Cesar Aguilar Zerpa
<agui...@goetting.de><mailto:agui...@goetting.de>
Sent: Friday, October 28, 2016 4:56 PM
To: lwip-users@nongnu.org<mailto:lwip-users@nongnu.org>
Subject: [lwip-users] Tcp Server on Texas Instrument RM57
Hi there,
I am trying to use the LwIP library (1.4.1) to create a simple tcp
server on a Texas Instrument RM57.
So far, I could make the "tcpecho_raw" example to work using an static ip.
I also added the following function (which did not work), to be able to
send data that wasn't an echo:
void tcpServer_send()
{
uint8 data[] = "TEST_DATA";
struct pbuf* buffer = pbuf_alloc(PBUF_RAW, sizeof(data), PBUF_POOL);
if (buffer)
{
sciDisplayText(sciREG1, txt_new_line, sizeof(txt_new_line));
sciDisplayText(sciREG1, "buffer created", sizeof("buffer
created"));
buffer->tot_len = sizeof(data);
buffer->len = sizeof(data);
buffer->payload = data;
tcpecho_es->p = buffer;
tcpecho_raw_send(tcpecho_raw_pcb, tcpecho_es);
}
}
As you can see, the function prints a debug msg ("buffer created"). I
modified the function 'tcpecho_raw_send' to also print a debug msg (the
data being sent).
When I run the program, I can see the msg "buffer created" every time
the function is called, but the msg from 'tcpecho_raw_send' comes only
when I close the client! (And the msg is missing the acutal data, btw).
NOTE: I want to build a server that receives some commands and sends a
block of data (4KB) every 60 ms. I am using the raw API because I don't
want to use blocking functions (from what I understood the netconn API
uses blocking functions).
I would appreciate any help.
Best regards,
Julio Aguilar
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i.A. Julio Cesar Aguilar Zerpa
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