CC3235SF: sl_WlanSet Failure when trying to enable NoPsPollMode.

Hi,

As you mentioned the meaning of the Error code -2188. I was unable to find its definition in any of the documents or error list included in the system. Is there a reason to why this is not defines as I could find meanings for other error codes.

In my device, the flow is such that whenever the device boots up. As soon as sl_start is called the device connects to the last provisioned AP, hence I get the error when I try to enable No PS Poll. Could you recommend a method in which I can implement the No PS Poll feature when the device auto connects when sl_start is called?

Regards,

Darpan.

Hi,

As mentioned by you that the device needs to be disconnected when this Policy is set, this has solved the issue with getting an error when sl_WlanSet is called while enabling No PS Poll.

But in order to limit the Enabling process only to when the policy is disabled I came across the api of sl_WlanGet which should return the value of No PS Poll as it exists in the device at that particular time. But when this is called I am always returned with the feature being disabled even when there was no error returned when setting it. The following is the implementation 

     SlWlanNoPSPollMode_t NoPsPollMode;
     uint16_t   config_opt = SL_WLAN_GENERAL_PARAM_OPT_NO_PS_POLL_MODE;
     uint16_t   Len = sizeof(SlWlanNoPSPollMode_t);

     NoPsPollMode.Enable = 0;
     retVal =  sl_WlanGet(SL_WLAN_CFG_GENERAL_PARAM_ID, &config_opt, &Len, (_u8* )&NoPsPollMode);
     if(retVal < 0)
     {
          printf(printf_WARN,"sl_WlanGet FAILED: %d", retVal);
     }

     if(NoPsPollMode.Enable == 0)
     {
        retVal = sl_WlanDisconnect();
        if(retVal < 0)
        {
            printf(printf_INFO,"[NWIF] sl_WlanDisconnect FAILED: %d", retVal);
        }

        NoPsPollMode.Enable = 1; // enable no PS-Poll mode (work without PS-Poll frames)
        retVal = sl_WlanSet(SL_WLAN_CFG_GENERAL_PARAM_ID, SL_WLAN_GENERAL_PARAM_OPT_NO_PS_POLL_MODE,sizeof(SlWlanNoPSPollMode_t),(_u8 *)& NoPsPollMode);
        if(retVal < 0)
        {
             printf(printf_WARN,"sl_WlanSet FAILED: %d", retVal);
        }//else{
            retVal = sl_Stop(200);
            if(retVal < 0)
            {
                printf(printf_ERROR,"[NWIF] sl_Stop FAILED: %d", retVal);
                while(1);
            }
            CLR_STATUS_BIT(g_ulStatus, STATUS_BIT_NWP_INIT);
            /* Restart the NWP */
            retVal = sl_Start(0, 0,0);
            if(retVal != ROLE_STA)
            {
                printf(printf_ERROR,"[NWIF] sl_Start FAILED: %d", retVal);
                while(1);
            }
            SET_STATUS_BIT(g_ulStatus, STATUS_BIT_NWP_INIT);
        }
     }else{
          printf(printf_DEBUG,"No PS Poll Already Enabled");
     }

Please correct me if I have been doing it wrong.

I have also read about your recommendation about writing it in a file but I would prefer if I could read its state through system api's.

Regards,

Darpan.

You are right. It looks like the parameter (which was added as a service pack patch) is not supported by the sl_WlanGet. I'm not sure why you are not getting error in the return code.

You will need to use another method to monitor the state of configuration.

Br,

Kobi

Hi,

I am using the service pack sp_4.8.0.8_3.7.0.1_3.1.0.26.bin in my code. And I think this is the latest available. Please could you let me know more details in the SDK through which I can get this to work.

Regards,

Darpan

Hi,

I have gone through the following document (SWRU455E) which states that the sl_WlanSet API is System-persistent, whose persistency is controlled by setting SL_DEVICE_GENERAL_PERSISTENT option using the sl_DeviceSet API.

I was not able to track down if setting No PS Poll using the sl_WlanSet API is a System-persistent feature or it is not.

In our system, we have set the General Persistence to False before enabling the default policy that we require. 

As you mentioned that we need to enable the No PS Poll feature just once since it affects the life of the flash. Can disabling the General Persistency permit us to enable No PS Poll every time we power on the device. Will this cause any harm to the device as a whole??

Regards,

Darpan