CCS/CC2652R: [RTLS/AOA] how to disable frequency hopping (lock on one channel) when measure IQ

HI team,

          For one AoA calculation, customer intend to use data cross frames which means they will use more than one frame data.

    Please instruct how to fix tag Tx channel to one(ex. ch37). Thank you.

Hi team,

Customer tried LNA_max code but they find IQ amplitude still varies frame by frame in the same channel. Does it mean Tx power of tag vary frame by frame?  Can user set Pmax of tag? What is the power control of tag?

Appreciate your support.

Hi Evan,

I have trace this thread.,

but i didn't know which function is suitable. Can you provide a suitable entry for AOA Master Project?

the end of RTLSMaster_processRTLSConnInfo() ?

Hi,

I don't think it is a good solution to update the channel map at the end of the function RTLSMaster_processRTLSConnInfo() [because this function is executed several times and the channel map update needs to be done only once].

I would rather suggest to execute the channel map update at the same time as the connection parameter update (find the treatment related to the event GAP_LINK_PARAM_UPDATE_EVENT).

Best regards,

Hi Clément,

I have add command as below, but useless, do you have another suggestion

    case GAP_LINK_PARAM_UPDATE_EVENT:
    {

      BLE_LOG_INT_STR(0, BLE_LOG_MODULE_APP, "APP : GAP msg status=%d, opcode=%s\n", 0, "GAP_LINK_PARAM_UPDATE_EVENT");
      connHandle = ((gapLinkUpdateEvent_t *) pMsg)->connectionHandle;

      if (connHandle != LINKDB_CONNHANDLE_INVALID && connHandle < MAX_NUM_BLE_CONNS &&
          ((gapLinkUpdateEvent_t *) pMsg)->hdr.status == SUCCESS)
      {
        // Upon param update, resend connection information
        RTLSMaster_processRTLSConnInfo(connHandle);
      }

      ///////////////////////////////////
      #define LL_NUM_BYTES_FOR_CHAN_MAP   5

      typedef struct
      {
        uint8 chanMap[ LL_NUM_BYTES_FOR_CHAN_MAP ]; // bit map corresponding to the data channels 0..39
      } chanMap_t;

      static chanMap_t chanMap;

      chanMap.chanMap[0] = 0x00;
        chanMap.chanMap[1] = 0xff;
        chanMap.chanMap[2] = 0xff;
        chanMap.chanMap[3] = 0xff;
        chanMap.chanMap[4] = 0x00;
        HCI_LE_SetHostChanClassificationCmd(chanMap.chanMap);

Hi,

First of all, can you verify the function is working as expected:

- Can you verify the HCI_LE_SetHostChanClassificationCmd() function is returning HCI_SUCCESS

- Can you verify you are receiving the event hciEvt_CmdComplete_t with cmdOpcode HCI_LE_SET_HOST_CHANNEL_CLASSIFICATION

Once you are sure the function is working as expected, can you verify if you are activating the expected channels? I mean the code you are using will activate 24 channels (I though you wanted 2 channels).

FYI, if you want to activate only 2 channels, try to use the following snippet:

      static chanMap_t chanMap;

      chanMap.chanMap[0] = 0x03; // 2 channels
      chanMap.chanMap[1] = 0x00;
      chanMap.chanMap[2] = 0x00;
      chanMap.chanMap[3] = 0x00;
      chanMap.chanMap[4] = 0x00;
      HCI_LE_SetHostChanClassificationCmd(chanMap.chanMap);

Best regards,

thank you, Clément

I change to set

      chanMap.chanMap[0] = 0x03; // 2 channels
      chanMap.chanMap[1] = 0x00;
      chanMap.chanMap[2] = 0x00;
      chanMap.chanMap[3] = 0x00;
      chanMap.chanMap[4] = 0x00;

USE JTAG to debug, RTLS won't get GAP_LINK_PARAM_UPDATE_EVENT, so i change to GAP_LINK_ESTABLISHED_EVENT

HCI_LE_SetHostChanClassificationCmd returned HCI_SUCCESS

but still can't lock to 2 channel

even put in the beginning of RTLSMaster_processStackMsg or RTLSMaster_processAppMsg

Hi,

I checked with R&D team and this "channel update missing callback" problem is currently under investigation.

Please bear with me.

Kind regards,

Hi Clément,

Did you get any response from R&D team?

Hi,

I have not yet received a work around from the R&D team.

However, even if you are not receiving the CB, have you verified (using a BLE analyzer) if the channel map is updated?

Regards,

update log for chan_map

Hi,

Nice! Glad to see you are making progress here. Can you confirm this is what you expected?

Can you also provide a few details on how you managed to do this? (I am pretty sure other people will benefit from that).

Best regards,

Hi Clément,

I am sorry to have confused you

I just check the chan_map have be updated to only 2 channel(0x3 means channel 1,2 . am i right?). but the start channel is 24 and it also hopping channel from 0~39(sorry, i should show more log)