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How to Accept the TCP connection in CC3000 with SPI Command Code?

Kwan Wei Peng
Intellectual 480 points

Hi Everyone,

I am currently trying to connect the CC3000 to low-level MCU with SPI. I managed to connect to the AP and connect to the Wifi, Sending TCP data successfully, but when comes to receiving data. The website doesn't even show a sign on how to build up the HCI_CMND as shown in this page . And I get stuck somewhere in the Accept() function for my TCP connection. May I know is there any solution on this? And, where can I get the full SPI Command Code instead of the fracture version?

Sincerely,

Kwan

  • 0
    TI__Mastermind 27095 points
    Hi Kwan,

    We do not have any document describing this. I would suggest you to take a look at the standard host driver code that is available. This should be able to show you the way to form the exact command for accept.

    Regards,
    Raghavendra
  • 0 in reply to Raghavendra Shenoy
    Intellectual 480 points

    Hi Raghavendra,

    Below are the steps I did to initiate the TCP server mode for the CC3000:

    1. HCI_CMND_Socket

    2. HCI_CMND_BIND

    3. HCI_CMND_LISTEN

    4. HCI_CMND_ACCEPT

    (From this HCI_CMND_ACCEPT, I manage to connect to the CC3000 with the Telnet. But, the new port giving is a "-2" without any new port number returned. The opcode is as below:

    HCI_CMND_ACCEPT
    TX:  01 00 09 00 00 01 05 10 04  00 00 00 00 00
    RX: 02 00 FF 00 00 00 00 00 00  00  00 00 00 00

    HCI_EVNT ACCEPT

    TX:  03 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00

    RX: 02 00 00 00 15  04 05 10 11 00 00 00 00 00 FE FF FF FF 02 00 00 00 00 00 00

    As you can see, it's giving a new port value with "-2". It's seem like keep waiting for another connection while the Telnet has been connected to it.

    May I know is there any fix to it?

  • 0 in reply to Kwan Wei Peng
    TI__Mastermind 27095 points
    Hi Kwan,

    The error code -2 is not an error as such. It is EAGAIN. That is, if you get -2, please keep calling accept again until any other occurs or the connection succeeds.

    Regards,
    Raghavendra
  • 0 in reply to Raghavendra Shenoy
    Intellectual 480 points

    Hi Raghavendra,

    But, the Telnet already connected to it. And, I tried to connect it with a C# program, I tried to delay by 3 second before Accept() as well. Still, it's keep waiting.

    Sincerely,

    Kwan

  • 0 in reply to Kwan Wei Peng
    Intellectual 480 points
    Hi Raghavendra,

    I done with the Accept() part by keep spamming it, may I know what about the RECV() part? Is it like the Accept part? Or just call it for once and keep waiting for response?

    Thanks.

    Sincerely,
    Kwan