CC2642R: Doubts about the eigenvalue discovery process

Hi team:

Environment: Simplelink_cc13xx_cc26xx_sdk_7_40_00_77

Example: Simple_central

Questions about the Eigenvalue discovery process:

When processing eigenvalue discovery in SimpleCentral_processGATTDiscEvent, the eigenvalue charHandle that was successfully discovered needs to be stored for subsequent eigenvalue read and write, as in the following statement:

  else if (discState == BLE_DISC_STATE_CHAR)
  {
    // Characteristic found, store handle
    if ((pMsg->method == ATT_READ_BY_TYPE_RSP) &&
        (pMsg->msg.readByTypeRsp.numPairs > 0))
    {
      uint8_t connIndex = SimpleCentral_getConnIndex(scConnHandle);

      // connIndex cannot be equal to or greater than MAX_NUM_BLE_CONNS
      SIMPLECENTRAL_ASSERT(connIndex < MAX_NUM_BLE_CONNS);

      // Store the handle of the simpleprofile characteristic 1 value
      connList[connIndex].charHandle
        = BUILD_UINT16(pMsg->msg.readByTypeRsp.pDataList[3],
                       pMsg->msg.readByTypeRsp.pDataList[4]);

      ... ...
    }

    discState = BLE_DISC_STATE_IDLE;
  }

Where the characteristic charHandle is stored:

connList[connIndex].charHandle = BUILD_UINT16 (pMsg->msg.readByTypeRsp.pDataList[3], PMsg->msg.readByTypeRsp.pDataList[4]);

What is the format of the data in the pDataList? Why do pDataList[3] and pDataList[4] make up charHandle? Where is the documentation on this issue? Or is there a definition on the code?

Thanks & Best regards,

Yolande