CC3120: Getting File for Embedded Programming

Hi Kristen,

We managed to port the SDK and run the trigger mode example on non-os STM32. From there we found that there are some API which get -2005 response, not all. 

For example sl_NetAppSet, it gives -2005 error while sl_NetAppGet works. same error is received in HTTP also if in the trigger mode, HTTP is defined as (1) in place of (0)

Even with SL_FULL defined. 

_i16 Status;

SlNetAppDnsClientTime_t Time;

Time.MaxResponseTime = 2000; // Max DNS retry timeout, DNS request timeout changed every retry,

Time.NumOfRetries = 30; // number DNS retries before sl_NetAppDnsGetHostByName failed

Status = sl_NetAppSet(SL_NETAPP_DNS_CLIENT_ID, SL_NETAPP_DNS_CLIENT_TIME, sizeof(Time), (_u8 *)&Time);

if( Status ) {

// error
}

kindly help with the issue.

With Regards

Ravdeep

Thank you, Kristen,

It was quite useful. but the problem got automatically solved when i patched the latest SDK plugin October 22, over the previous SDK.

I am trying Trigger mode example given in the CC3120 plugin, there is one BsdTcpRxOpen() function which opens a TCP socket in Trigger mode.It gives the Fatal error fatal error: no cmd ack detected., this error is given by sl_SetSockOpt(). 

I tested TCP server where i used sl_Select() before sl_Accept() and i received the Trigger event. But when i try the same for sl_Recv(), there is no trigger event. 

According to Programming guide, sl_SetSockOpt() has to be used to enable nonblocking mode for working of sl_Select(). but whenever and wherever i call sl_SetSockOpt(), it gives the fatal error: no cmd ack detected. 

Can you please help me with this.

Ravdeep

Referring to page 81 swru455epdf

www.ti.com/.../swru455e.pdf

SimpleLink supports:
• Readfds: On data socket: data arrived. On listen
socket: indicating new client connected
• Writefds: only on TCP connect, must configure
nonblocking socket
• Exceptfds: not supported

Hi Ben,
Yes, acutally the problem was with spi_write, if it is called immediately for setting or getting functions (the driver calls spi_write for cmd, data, payload etc many times), then cc3120 is not able to respond. I added delay between writes, then i never get the problem. SPI rate is quite lower then specifications. still it causes problems, but the fix helped me solve it.

Being working on other stuff (sockets), I am getting one trouble with the Trigger mode. For tcp socket, i am calling select, it works fine with one socket. but when we open multiple socket, then interrupt fails for later opened sockets.

www.ti.com/.../swru455e.pdf

I tried one fix which worked for me. before calling the first sl_select, enabling the rxset variable fixed the issue, but i got trouble if the connection is closed by either side. then it again disables all the interrupts. It seems that their is some bug in interrupt handling for sockets. especially with the sl_select function.

for(int i=0;i<16;i++)
SL_SOCKET_FD_SET(i, &rxSet);

sl_select function is ment to help mutliple sockets but it fails to reset or re-enable the trigger event.

It will be very kind of you if you can help me with this as soon as possible as the product is stuck because of this issue.

With Regards.

Ravdeep

Hi Ben, thank you for the reply.

You are right about sl_select rxset.

The code is :

static _i32 BsdTcpClient_Trigger_Mode()
{
_i16 sock[20]={0};
_i16 Status,Sd,Sd1;
_u16 nfds;
SlSockAddrIn_t LocalAddr,Addr;
SlSockNonblocking_t BlockingOption;
BlockingOption.NonBlockingEnabled = 1;

SlTimeval_t timeVal = {0};
SlFdSet_t rxSet;
SlFdSet_t wxSet;
SlFdSet_t exSet;

LocalAddr.sin_family = SL_AF_INET;
LocalAddr.sin_port = sl_Htons(5003);
LocalAddr.sin_addr.s_addr = sl_Htonl(SL_IPV4_VAL(10,100,75,106));
timeVal.tv_sec = 0;
timeVal.tv_usec = 0;

int index = 0;
//Open TCP server socket
repeat:
sock[index] = sl_Socket(SL_AF_INET,SL_SOCK_STREAM, 0);
CLI_Write("sock[index] = %d\n\r",sock[index]);
if( Sd < 0 )
{
CLI_Write(" [TCP ] Create socket Error \n\r");
ASSERT_ON_ERROR(Sd);
}

Status =
sl_SetSockOpt(sock[index],SL_SOL_SOCKET,SL_SO_NONBLOCKING,(_u8*)&BlockingOption,sizeof(BlockingOption));
if( Status )
{

CLI_Write(" [TCP ] SO_NONBLOCKING socket Error \n\r");
}


Status = sl_Connect(sock[index], ( SlSockAddr_t *)&LocalAddr, sizeof(SlSockAddr_t));
if( Status )
{

CLI_Write(" [TCP ] Connect %d\n\r",Status);
}

nfds = sock[index] + 1;
SL_SOCKET_FD_ZERO( &rxSet );
SL_SOCKET_FD_ZERO( &wxSet );
SL_SOCKET_FD_ZERO( &exSet );
SL_SOCKET_FD_SET( sock[index],&rxSet );
SL_SOCKET_FD_SET( sock[index],&wxSet );
SL_SOCKET_FD_SET( sock[index],&exSet );
Status = sl_Select( nfds, NULL, &wxSet, NULL, &timeVal );
if( Status <0 )
{
CLI_Write(" [TCP Server] Select socket Error Status %d \n\r",Status);
}
int firsttime=0;
while(1)
{

while(gTriggerModeEventArrived!=TRUE)
{
ProcessEvents();
}
gTriggerModeEventArrived=FALSE;

SL_SOCKET_FD_ZERO( &rxSet );
SL_SOCKET_FD_ZERO( &wxSet );
SL_SOCKET_FD_ZERO( &exSet );

Status = sl_Select( nfds, &rxSet, &wxSet, &exSet, &timeVal );
if( Status <0 )
{
CLI_Write(" [TCP Server] Select socket Error Status %d \n\r",Status);
}

// if (SL_SOCKET_FD_ISSET(Sd, &wxSet)) I commented this out since either rxSet changes sometimes exset sometimes wxset depending on the recv, close, connect. I will not get any problem because of this since if you see my code, it opens one socket and does not open second untill first one is not close.

{
Status = sl_Recv(sock[index], &(uBuf.BsdBuf[0]), 5, 0);
if( Status < 0)
{
if (Status != -11)
{

sl_Close(sock[index]);
CLI_Write(" [TCP Server] Data recv Error \n\r");
ASSERT_ON_ERROR(Status); //TCP_RECV_ERROR
}
}
}
CLI_Write(" [TCP Server] %2X %2X %2X %2X %2X\n",uBuf.BsdBuf[0],uBuf.BsdBuf[1],uBuf.BsdBuf[2],uBuf.BsdBuf[3],uBuf.BsdBuf[4]);
if( Status == 0 && firsttime == 1)              //socket closed.
{

index++;
goto repeat;
}

firsttime = 1;
SL_SOCKET_FD_ZERO( &rxSet );
SL_SOCKET_FD_ZERO( &wxSet );
SL_SOCKET_FD_ZERO( &exSet );
SL_SOCKET_FD_SET( sock[index],&rxSet );
SL_SOCKET_FD_SET( sock[index],&wxSet );
SL_SOCKET_FD_SET( sock[index],&exSet );
Status = sl_Select( nfds, &rxSet, NULL, &exSet, &timeVal );
if( Status <0 )
{
CLI_Write(" [TCP Server] Select socket Error Status %d \n\r",Status);
}
}
}



int32_t HandleUserApplication()
{
// Trigger mode code
//-----
BsdTcpClient_Trigger_Mode(); //called at end of the HandleUserApplication function of Trigger mode example code.
}


void SimpleLinkSocketTriggerEventHandler(SlSockTriggerEvent_t *pSlTriggerEvent)
{
switch(pSlTriggerEvent->Event)
{
case SL_SOCKET_TRIGGER_EVENT_SELECT:
{
LOG_MESSAGE("Notify User SL_SOCKET_TRIGGER_EVENT_SELECT \n\r");
gTriggerModeEventArrived = TRUE;
break;
}
default:
break;
}
}


Here if you see, if i comment sl_close, then it starts working. but still number of the sockets i was able to open were random(sometimes 5, sometimes 12), and interrupt always stops randomly.

I even called SL_SOCKET_FD_CLR( sock[index],&rxSet ); SL_SOCKET_FD_CLR( sock[index],&wxSet ); SL_SOCKET_FD_CLR( sock[index],&exSet ); instead of sl_close but no difference.

There is something wrong, i am not able to point out.

With Regards
Ravdeep