The 52235 tcp issue

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The 52235 tcp issue

by Sanjay Morab :: Rate this Message:

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Dear All

The Sample code “Coldfire_lite” which is provided by Freescale had “ColdFire_lite_tcp_server” project. I am using this project for the my application. The original sample code I am using with The development board.

When I start the PC side application up to 25 packets it woks fine but after 25 packet transmission the communication hanges.. Select Coldfire_Lite_tcp_server. Replace the code listed below. Try to use The Hyperterminal for sending the data in winsock mode.

void emg_tcp_rx( void )

{

int length, i;

unsigned long rate;

// PARAM1: M_SOCK socket,

// PARAM2: char * buffer

// PARAM3: unsigned length

// RETURNS: number of bytes actually read, or -1 if error.

// int m_recv(M_SOCK so, char * buf, unsigned buflen)

length = m_recv( emg_tcp_communication_socket, (char *)buffer, RX_BUFFER_SIZE );

if( length > 5)

{

buffer[length] = '\0';

printf("\n Received String %s Length %d\r\n",buffer,length);

m_send(emg_tcp_communication_socket,(char *)buffer,length);

}

Regards

Sanjay Morab

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RE: The 52235 tcp issue

by Seymour David-ra2693 :: Rate this Message:

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Hi Sanjay,

I took your code and tried it on my updated code base and it works fine. I haven't tried it on the old code base thought.

Copy of code below as I did modify it slightly.

We/Freescale will post the updated version soon that supports more ColdFire processors and has many code updates to improve reliability.

   //FSL terminal example. Configure HyperTerm TCP client to the displayed
   //FSL IP address and give the port number 5678.
   //FSL This code echo's back the type character as well as prints
   //FSL to terminal window.
void emg_tcp_rx( void )

{

static int length, i;
unsigned long rate;

            // PARAM1: M_SOCK socket,
            // PARAM2: char * buffer
            // PARAM3: unsigned length
            //
            // RETURNS: number of bytes actually read, or -1 if error.
            // int m_recv(M_SOCK so, char * buf, unsigned buflen)

length = m_recv( emg_tcp_communication_socket, (char *)buffer, RX_BUFFER_SIZE );

            if( length > 0)
            {
              buffer[length] = '\0';
                 if(buffer[0]== 0x0d)
                 printf("\n");
                 else
                 {
                 printf("%s",buffer);
                 if(buffer[length-1]==0x0d)
                 {
                   printf("\n");
                 }
                 }

                 m_send(emg_tcp_communication_socket,(char *)buffer,length);
            }
}

Regards,

David

David E Seymour

http://www.freescale.com/coldfire

From: coldfire-bounce@... [mailto:coldfire-bounce@...] On Behalf Of Sanjay Morab
Sent: Friday, September 12, 2008 2:40 AM
To: Seymour David-RA2693
Subject: [ColdFire] The 52235 tcp issue

Dear All

void emg_tcp_rx( void )

{

int length, i;

unsigned long rate;

// PARAM1: M_SOCK socket,

// PARAM2: char * buffer

// PARAM3: unsigned length

// RETURNS: number of bytes actually read, or -1 if error.

// int m_recv(M_SOCK so, char * buf, unsigned buflen)

length = m_recv( emg_tcp_communication_socket, (char *)buffer, RX_BUFFER_SIZE );

if( length > 5)

{

buffer[length] = '\0';

printf("\n Received String %s Length %d\r\n",buffer,length);

m_send(emg_tcp_communication_socket,(char *)buffer,length);

}

Regards

Sanjay Morab

coldfire@... Send a post to the list. coldfire-join@... Join the list. coldfire-digest@... Join the list in digest mode. coldfire-leave@... Leave the list. coldfire@... Send a post to the list. coldfire-join@... Join the list. coldfire-digest@... Join the list in digest mode. coldfire-leave@... Leave the list.