I have now come so far in my project that the main area that is hampering progress is the CC3000. I there for need som help to try and locate the reasons for it crashing.
More related information in this thread: http://e2e.ti.com/support/low_power_rf/f/851/t/312857.aspx
I have a AFE connected to the Tiva C that generates data from 16-channels, this data is then transfered from the Tiva with the help of the CC3000 over to a PC where Matlab imports the data. This is working but there are two areas of problems.
1. The CC3000 will hang and most of the time stop sending data because it no longer has any internal bufferts left.
2. The system it too slow to be able to send data from the data acquisition to the delivery in Matlab. This I should be able to solve during the following two weeks so it is not a problem I need to bring up here right now.
Back to the main problem where the bufferts aren´t cleared. I have been trying to do a stability test to see how long the system can handle to contentiously send data and right now it is around 500 sec before the system fails to clear the internal CC3000 bufferts. Below is the area and the changes I have made to socket.c:
//*****************************************************************************
//
//! HostFlowControlConsumeBuff
//!
//! @ param sd socket descriptor
//!
//! @return 0 in case there are buffers available,
//! -1 in case of bad socket
//! -2 if there are no free buffers present (only when
//! SEND_NON_BLOCKING is enabled)
//!
//! @brief if SEND_NON_BLOCKING not define - block until have free buffer
//! becomes available, else return immediately with correct status
//! regarding the buffers available.
//
//*****************************************************************************
static int
HostFlowControlConsumeBuff( int sd)
{
#define SEND_NON_BLOCKING;
#ifndef SEND_NON_BLOCKING
/* wait in busy loop */
do
{
// In case last transmission failed then we will return the last failure
// reason here.
// Note that the buffer will not be allocated in this case
if (tSLInformation.slTransmitDataError != 0)
{
errno = tSLInformation.slTransmitDataError;
UARTprintf( "NON: Transmission error code = %d\n" , tSLInformation.usNumberOfFreeBuffers);
tSLInformation.slTransmitDataError = 0;
return errno;
}
if (SOCKET_STATUS_ACTIVE != get_socket_active_status(sd))
return -1;
}
while (0 == tSLInformation.usNumberOfFreeBuffers);
{
tSLInformation.usNumberOfFreeBuffers--;
UARTprintf( "NON: Number of buffers free = %d\n" , tSLInformation.usNumberOfFreeBuffers);
return 0;
}
#else
// In case last transmission failed then we will return the last failure
// reason here.
// Note that the buffer will not be allocated in this case
if (tSLInformation. slTransmitDataError != 0)
{
errno = tSLInformation. slTransmitDataError ;
UARTprintf ("Transmission error code = %d\n" , tSLInformation.usNumberOfFreeBuffers );
tSLInformation. slTransmitDataError = 0;
return errno;
}
if(SOCKET_STATUS_ACTIVE != get_socket_active_status(sd))
return -1;
//If there are no available buffers, return -2. It is recommended to use
// select or receive to see if there is any buffer occupied with received data
// If so, call receive() to release the buffer.
if(0 == tSLInformation. usNumberOfFreeBuffers )
{
UARTprintf( "No more buffers left = %d\n" , tSLInformation.usNumberOfFreeBuffers );
return -2;
}
else
{
tSLInformation. usNumberOfFreeBuffers --;
UARTprintf ("Number of buffers left = %d\n" , tSLInformation.usNumberOfFreeBuffers );
return 0;
}
#endif
}
As you can see I am mainly printing information to the UART to be able to track when the system hangs, but I have also added a breakpoint so I can take a look at all the variables values at that point. My question is, what can I do to force a clearing of the buffers? It is stated that the system has 5 buffers and I am wondering if you can specify how big those buffers are and if there is any kind of related information that I may benefit from knowing.
According to the information given in the HostFlowControlConsumeBuff I should use receive to see if any buffer is occupied, but there is no information that I am sending over the wifi that is to be received and I have a timer running that activates the recv() every sec. But it doesn´t make any difference because the system still hangs even if I do a recv() between each sending!
