Question about C6455 UDP

dear  Sivaraj Kuppuraj:

       Thanks for your reply and valuable informations very much!

       Is our own custom codes,as follows:

       the "recv "is the code  of recv side,the "send"is the code  of send side,now they connot communicate with each other,we hope you can help us to check,Is there ang prombles? ,Thanks very much!!!

       As You introduced "C6455_emac_recv "and "C6455_emac_send "examples  which show how to communicate between two DSPs using the EMAC peripheral.They Seemingly communicate based MAC level ,But we want to  communicate based IP level,So we really need you help,thanks very much!!!

//EMAC初始化

void myEmacInit(void)
{
 Bool  emacEn;

    /* Unlock the control register */
    CSL_FINST(((CSL_DevRegs*)CSL_DEV_REGS)->PERLOCK, DEV_PERLOCK_LOCKVAL,
              UNLOCK);

    /* Enable the EMAC */
    CSL_FINST(((CSL_DevRegs*)CSL_DEV_REGS)->PERCFG0, DEV_PERCFG0_EMACCTL,
              ENABLE);

    do {
        emacEn = (Bool) CSL_FEXT(((CSL_DevRegs*)CSL_DEV_REGS)->PERSTAT0,
                                   DEV_PERSTAT0_EMACSTAT);
    } while (emacEn != TRUE);

}

//网络接收程序
void UDP_Recv()
{
    struct sockaddr_in localAddr;
 struct sockaddr_in clientAddr;
 int sockAddrSize;

 int nNetRecvLen;

    // Allocate the file environment for this task
    fdOpenSession(TaskSelf());
   
    // Create the main TCP listen socket
    if(INVALID_SOCKET == (Sudp_srv = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)))
    {
     goto leave;
    }

    // Set Port = 10010, leaving IP address = Any
    sockAddrSize=sizeof(struct sockaddr_in);
    bzero((char *)&SClient, sockAddrSize);
    SClient.sin_len = (unsigned char)sockAddrSize;
    SClient.sin_addr.s_addr = inet_addr( "192.168.2.69" );
    SClient.sin_family = AF_INET;
    SClient.sin_port   = htons(10010);

    bzero((char *)&localAddr, sockAddrSize);
    localAddr.sin_len = (unsigned char)sockAddrSize;
    localAddr.sin_addr.s_addr = inet_addr( "192.168.2.68" );//htonl(INADDR_ANY);
    localAddr.sin_family = AF_INET;
    localAddr.sin_port   = htons(10011);

    // Bind socket
    if(bind(Sudp_srv, (PSA)&localAddr, sockAddrSize) < 0 )
    {
     goto leave;
    }

    nNetRecvLen = 0;
    while(1)
    {
        //接收UDP数据
     nNetRecvLen = recvfrom(Sudp_srv, (char *)uBuff, 512, 0, (PSA)&SClient, (int *)(&sockAddrSize));

//     nNetRecvLen = sendto(Sudp_srv, (char *)uBuff, 512, 0, (PSA)&SClient, sockAddrSize);
     nNetRecvLen = 0;
    }
leave:
    // We only get here on an error - close the sockets
    if( Sudp_srv != INVALID_SOCKET )
    {
       fdClose( Sudp_srv );
    }
    // This task is killed by the system - here, we block
    TaskBlock( TaskSelf() );
}

//网络接收程序
void UDP_Recv()
{
    struct sockaddr_in localAddr;
 struct sockaddr_in clientAddr;
 int sockAddrSize;

 int nNetRecvLen;

    // Allocate the file environment for this task
    fdOpenSession(TaskSelf());
   
    // Create the main TCP listen socket
    if(INVALID_SOCKET == (Sudp_srv = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)))
    {
     goto leave;
    }

    // Set Port = 10010, leaving IP address = Any
    sockAddrSize=sizeof(struct sockaddr_in);
    bzero((char *)&SClient, sockAddrSize);
    SClient.sin_len = (unsigned char)sockAddrSize;
    SClient.sin_addr.s_addr = inet_addr( "192.168.2.68" );
    SClient.sin_family = AF_INET;
    SClient.sin_port   = htons(10010);

    bzero((char *)&localAddr, sockAddrSize);
    localAddr.sin_len = (unsigned char)sockAddrSize;
    localAddr.sin_addr.s_addr = inet_addr( "192.168.2.69" );//htonl(INADDR_ANY);
    localAddr.sin_family = AF_INET;
    localAddr.sin_port   = htons(10011);

    // Bind socket
    if(bind(Sudp_srv, (PSA)&localAddr, sockAddrSize) < 0 )
    {
     goto leave;
    }

    nNetRecvLen = 0;
    while(1)
    {
        //接收UDP数据
//     nNetRecvLen = recvfrom(Sudp_srv, (char *)uBuff, 512, 0, (PSA)&SClient, (int *)(&sockAddrSize));

     nNetRecvLen = sendto(Sudp_srv, (char *)uBuff, 512, 0, (PSA)&SClient, sockAddrSize);
     nNetRecvLen = 0;
    }
leave:
    // We only get here on an error - close the sockets
    if( Sudp_srv != INVALID_SOCKET )
    {
       fdClose( Sudp_srv );
    }
    // This task is killed by the system - here, we block
    TaskBlock( TaskSelf() );
}

     

Thanks & regards,

linglingzhan

    

Hi,

Thanks for your update.

Please modify the same "C6455_emac_recv "and "C6455_emac_send "example code shared for MAC level in my above post and change it accordingly to IP level by yourself.

Thanks & regards,
Sivaraj K

dear Sivaraj K:
thanks for your Proposal ,but we really donnot know how to change it accordingly to IP level ,do you have some examples like this?
Thanks very much!!Thanks & regards,lingling zhan

dear Sivaraj K:
Thanks for your reply,but we have two questions:
one:Can two C6455s transfer data use UDP with each other?,if can,which release of NDK should we use,now we use CCS5.2 as soft tool.
two: As your suggestion ,but we really donnot know how to change it accordingly to IP level ,do you have some examples like this?
Thanks very much!!

Thanks & regards,
lingling zhan

Hi,

Thanks for your update.

If you check the NDK download page, it is clearly mentioned in the note that, c6455 is a legacy older device and you will not find the ethernet driver package in the NDK, so it is recommended to check the device web page for NSP to get the ethernet driver package or you can download the ethernet driver from the NDK 2.00 full package. Please download NDK 2.00 from the below page:

http://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/targetcontent/ndk/index.html

and please check the c6455 device web page for NSP (Ethernet driver package) updates.

Note: If you wish to obtain the driver for older devices (DM6437, C6747, OMAPL137, DM648, C6455, etc.) please check the device web page for NSP (Ethernet driver package) updates or download the driver from the NDK 2.00 full package.

Thanks & regards,

Sivaraj K

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jie wang75279 said:

...

void UDP_Recv()
{
...
    localAddr.sin_addr.s_addr = inet_addr( "192.168.2.68" );//htonl(INADDR_ANY);
    localAddr.sin_family = AF_INET;
    localAddr.sin_port   = htons(10011);

...

    while(1)
    {
...
     nNetRecvLen = recvfrom(Sudp_srv, (char *)uBuff, 512, 0, (PSA)&SClient, (int *)(&sockAddrSize));

...
    }
...
}

//网络接收程序
void UDP_Recv()
{
,,,
    SClient.sin_addr.s_addr = inet_addr( "192.168.2.68" );
    SClient.sin_family = AF_INET;
    SClient.sin_port   = htons(10010);

,,,

    while(1)
    {
,,,

     nNetRecvLen = sendto(Sudp_srv, (char *)uBuff, 512, 0, (PSA)&SClient, sockAddrSize);
,,,
    }
,,,
}

One thing to note is that you have two functions void UDP_Recv().  Assuming that is not your issue, the next thing you might want to look at is the ports you bind to.

Your "sender" is sending to 10010.  Your "receiver" is bound to 10011.