Compiler/CC2564: How to reduce the power consumption of CC2564B

Hi Dylan,

Hope you're having a great day too!

I have assigned an expert to help you on this issue. To clarify, which SDK version is the customer using?

Best Regards,

Jenny

Hi Jenny,

Customer told me they used the general version SDK for STM32. 

Kind regards

Dylan

Hi Jenny,

Are there any update?

Dylan

Do, you have HCILL enabled? HCILL protocol allows the MCU and the controller to enter/leave low power states with a handshake. 

Also, Did they enable low power modes on the controller?

Thanks

Hi Nagalla,

I checked the code and found the function VS_Enable_Sleep_Mode, which is consistent with the HCI command mentioned in your email. However, after sending VS_Enable_Sleep_Mode( BluetoothStackID ,1 ), the return value is 0, which means the transmission is successful, but there is no change in power consumption. Is the command correct? Do other parameters need to be set?
The function code is as follows. If Sniff mode is used, how should several parameters of Sniff mode be set to ensure the lowest power consumption, and is there any range for the parameters?

              /* The following function prototype represents the vendor specific   */

   /* function which is used to enable/disable the HCILL low power      */

   /* protocol for the Local Bluetooth Device specified by the Bluetooth*/

   /* Protocol Stack that is specified by the Bluetooth Protocol Stack  */

   /* ID.  The second parameter specifies whether to enable (TRUE) or   */

   /* disable (FALSE) the HCILL low power protocol.  This function      */

   /* returns zero if successful or a negative return error code if     */

   /* there was an error.                                               */

int BTPSAPI VS_Enable_Sleep_Mode(unsigned int BluetoothStackID, Boolean_t Enable)

{

   int    ret_val;

   Byte_t Length;

   Byte_t Status;

   Byte_t ReturnBuffer[8];

   Byte_t CommandBuffer[SLEEP_MODE_CONFIGURATIONS_COMMAND_SIZE];

   Byte_t OGF;

   Word_t OCF;

   /* Before continuing, make sure the input parameters appear to be    */

   /* semi-valid.                                                       */

   if(BluetoothStackID)

   {

      /* Format the command to send.                                    */

      ASSIGN_HOST_BYTE_TO_LITTLE_ENDIAN_UNALIGNED_BYTE(&(CommandBuffer[0]), 1);

      ASSIGN_HOST_BYTE_TO_LITTLE_ENDIAN_UNALIGNED_BYTE(&(CommandBuffer[1]), ((Enable == TRUE)?1:0));

      ASSIGN_HOST_BYTE_TO_LITTLE_ENDIAN_UNALIGNED_BYTE(&(CommandBuffer[2]), 0);

      ASSIGN_HOST_BYTE_TO_LITTLE_ENDIAN_UNALIGNED_BYTE(&(CommandBuffer[3]), 0xFF);

      ASSIGN_HOST_BYTE_TO_LITTLE_ENDIAN_UNALIGNED_BYTE(&(CommandBuffer[4]), 0xFF);

      ASSIGN_HOST_BYTE_TO_LITTLE_ENDIAN_UNALIGNED_BYTE(&(CommandBuffer[5]), 0xFF);

      ASSIGN_HOST_BYTE_TO_LITTLE_ENDIAN_UNALIGNED_BYTE(&(CommandBuffer[6]), 0xFF);

      ASSIGN_HOST_WORD_TO_LITTLE_ENDIAN_UNALIGNED_WORD(&(CommandBuffer[7]), 0x0000);

      /* Send the command to set the sleep mode configuration.          */

      Length  = sizeof(ReturnBuffer);

      OGF     = VS_COMMAND_OGF(VS_SLEEP_MODE_CONFIGURATIONS_COMMAND_OPCODE);

      OCF     = VS_COMMAND_OCF(VS_SLEEP_MODE_CONFIGURATIONS_COMMAND_OPCODE);

      ret_val = HCI_Send_Raw_Command(BluetoothStackID, OGF, OCF, SLEEP_MODE_CONFIGURATIONS_COMMAND_SIZE, (Byte_t *)(CommandBuffer), &Status, &Length, ReturnBuffer, TRUE);

      /* Map the return results into an error code.                     */

      ret_val = MapSendRawResults(ret_val, Status, Length, ReturnBuffer);

   }

   else

      ret_val = BTPS_ERROR_INVALID_PARAMETER;

   /* Return the result the caller.                                     */

   return(ret_val);

}

BR

Brandon

Hi team,

any update for now?

BR

Brandon.

How are you measuring the power? Is it across only CC2564C or the entire board i.e MCU+BTcontroller. If it is the later, ensure that the MCU is also entering low power modes.

Thanks