CC3135: blocking in function _SlDrvWaitForPoolObj

Hi,

what do you mean by the 'address of the pending element"?

can you share a code snippet of the application?

Shlomi

Hello, thank you for this response.
In this loop, there is the line

/* wait for action to be free */
(void)_SlDrvSyncObjWaitForever(&g_pCB->ObjPool[CurrObjIndex].SyncObj);

or g_pCB->ObjPool[CurrObjIndex].SyncObj is null.

The two devices communicate via Modbus TCP.

the biggest problem is that the error occurs randomly from around 6 to 20 hours

I inserted the functions used :

int16_t wireless_simplelink_init(char *ssid, char *pass, uint8_t channel) {
    
    int16_t sl = sl_WifiConfig();
    
    if (sl >= 0)
    {
        if(ssid != NULL) 
        {
            // printf("\r\nsl_Start");
            sl_Start(NULL, NULL, NULL);
            
            // ssid string of 32 characters
            sl = sl_WlanSet(SL_WLAN_CFG_AP_ID, SL_WLAN_AP_OPT_SSID, strlen(ssid), (const uint8_t *)ssid);
            
            // pass string of 64 characters
            if(pass != NULL) sl = sl_WlanSet(SL_WLAN_CFG_AP_ID, SL_WLAN_AP_OPT_PASSWORD, strlen(pass), (const uint8_t *)pass);
            
            _u8 val = SL_WLAN_SEC_TYPE_WPA;
            sl = sl_WlanSet(SL_WLAN_CFG_AP_ID, SL_WLAN_AP_OPT_SECURITY_TYPE, 1, (_u8 *)&val);
            
            val = channel ? channel : 1;
            sl = sl_WlanSet(SL_WLAN_CFG_AP_ID, SL_WLAN_AP_OPT_CHANNEL, 1, (_u8 *)&val);
            
            val = 1; //_u8 Enabled5GStatus = 1;
            sl = sl_WlanSet(SL_WLAN_CFG_GENERAL_PARAM_ID, SL_WLAN_GENERAL_PARAM_OPT_ENABLE_5G, sizeof (_u8), (_u8 *)&val);
            
            _u16 max_ap_sta_aging = 10; // (seconds) Set Max station aging time - default is 60 seconds
            sl_WlanSet(SL_WLAN_CFG_AP_ID, SL_WLAN_AP_OPT_MAX_STA_AGING, sizeof(max_ap_sta_aging), (_u8 *)&max_ap_sta_aging);
            
            /* For changes to take affect, we restart the NWP
             */
            sl = sl_Stop(200);
            
            sl = sl_Start(NULL, NULL, NULL);
        }
        
        if (sl < 0) {
            sl = -1;
        }
    } else {
        #if defined(_DEBUGINITPRINTF)
        _DEBUGINITPRINTF("\r\nsl_WifiConfig failed: %i", sl);
        #endif
    }
    
    return sl;
}

int16_t wireless_simplelink_Open(void) {
    // printf("\r\nsl_Start");
    int16_t sl = sl_Start(NULL, NULL, NULL);

    cc3135Module.cc3135_socket = sl_Socket(SL_AF_INET, SL_SOCK_STREAM, 0);
    SlSockNonblocking_t nonBlocking = {.NonBlockingEnabled = 1};
    sl_SetSockOpt(cc3135Module.cc3135_socket, SL_SOL_SOCKET, SL_SO_NONBLOCKING, &nonBlocking,
            sizeof (SlSockNonblocking_t));

    /* create socket */
    SlSockAddrIn_t LocalAddr;
    LocalAddr.sin_family = SL_AF_INET;
    LocalAddr.sin_port = sl_Htons(((uint16_t) 2000));
    LocalAddr.sin_addr.s_addr = sl_Htonl(SL_IPV4_VAL(200, 200, 200, 1));
    /* Bind socket to local port */
    // printf("\r\nsl_Bind");
    sl_Bind(cc3135Module.cc3135_socket, (const SlSockAddr_t *) &LocalAddr, sizeof (SlSockAddrIn_t));

    /* Listen on the socket. Ready to accept a connection */
    // printf("\r\nsl_Listen");
    sl_Listen(cc3135Module.cc3135_socket, 0);

    wirelessModule.token = interruptDispatcher_addCb(wireless_simplelink_accept, &wirelessModule, INT_1S);
    wireless_simplelink_stop_accept();
    
    return sl;
}

int16_t wireless_simplelink_send(const uint8_t *buf, uint8_t len) {
    int16_t ret = sl_Send(cc3135Module.cc3135_activeSocket, buf, len, 0);

    if (ret < 0) {
        wireless_simplelink_device_disconnected(false);
    }
    
    return ret;
}

int16_t wireless_simplelink_recv(uint8_t *buf, uint8_t len) {

    int16_t ret = sl_Recv(cc3135Module.cc3135_activeSocket, buf, len, 0);
        
    if (ret == 0) {
        wireless_simplelink_device_disconnected(false);
    }
}

Hi,

If the SyncObj is NULL, then you would get stuck.

Sounds like a memory corruption somewhere.

The SyncObj are all set statically during initialization and should have valid memory address.

Maybe the best shot here is to try and add a data watchpoint and catch when one of the pool objects get NULL-ed.

BTW, if you are working in non-blocking mode, send/recv may get EAGAIN error which just means to try again and you abort on any type of error so you may want to change that.

Regards,

Shlomi