Bluetooth Classic Packet Error Rate#

Introduction#

This application demonstrates how to configure the necessary parameters to start transmitting or receiving BT PER packets.

Setting Up#

To use this application, the following hardware, software and project setup is required.

Hardware Requirements#

Windows PC with Host interface (UART / SPI / SDIO).
Silicon Labs RS9116 Wi-Fi Evaluation Kit
Host MCU Eval Kit. This example has been tested with:
- Silicon Labs WSTK + EFR32MG21
- Silicon Labs WSTK + EFM32GG11
- STM32F411 Nucleo
Spectrum Analyzer and/or Power Analyzer

figureSetup Diagram for BT PER Example

Software Requirements#

WiSeConnect SDK
Embedded Development Environment
- For Silicon Labs EFx32, use the latest version of Simplicity Studio
- For STM32, use licensed Keil IDE

Application Build Environment#

Platform#

The application is designed to run on any one of the following host platforms

Host Interface#

By default, the application is configured to use the SPI bus for interfacing between host platforms EFR32MG21 or STM32F411 Nucleo and RS9116W EVK.
The application may also be configured to use the SDIO bus for interfacing between the host platform EFM32GG11 and RS9116W EVK.

Project Configuration#

The Application is provided with the project folder containing Simplicity Studio and Keil project files.

Simplicity Studio

The Simplicity Studio project is used to evaluate the application on EFR32MG21.
EFR32 Host Platform
- If the radioboard is BRD4180A or BRD4181A, then access the path <SDK>/examples/featured/bt_per/projects/bt_per-brd4180a-mg21.slsproj
- If the radioboard is BRD4180B or BRD4181B, then access the path <SDK>/examples/featured/bt_per/projects/bt_per-brd4180b-mg21.slsproj
- The radioboard version is shown in the following image

EFR Radioboards

EFM32GG11 Host Platform
- The Simplicity Studio project is used to evaluate the application on EFM32GG11.
  - Project path:<SDK>/examples/featured/bt_per/projects/bt_per-brd2204a-gg11.slsproj

Keil Project

The Keil project is used to evaluate the application on STM32.
Project path: <SDK>/examples/featured/bt_per/projects/bt_per-nucleo-f411re.uvprojx

Bare Metal/RTOS Support#

This application supports bare metal and RTOS environment. By default, the application project files (Keil and Simplicity Studio) are provided with bare metal configuration.

Application Configuration Parameters#

The application can be configured to suit your requirements and development environment. Read through the following sections and make any changes needed.

Modifications to `rsi_bt_per.c`#

Device Name

  #define RSI_BT_LOCAL_NAME "PER Test"

Transmit mode

  #define RSI_CONFIG_PER_MODE  RSI_BLE_PER_TRANSMIT_MODE
  #define BT_TRANSMIT_CMD_ID   0x15

Receive mode

  #define RSI_CONFIG_PER_MODE  RSI_BLE_PER_RECEIVE_MODE
  #define BT_RECEIVE_CMD_ID    0x16

Payload Type

Defines the transmit payload.

  #define SEQUENCE_0     0   // All 00s
  #define SEQUENCE_1     1   // All FFs
  #define SEQUENCE_2     2   // All 55s
  #define SEQUENCE_F0    3   // All F0s
  #define SEQUENCE_PRBS  4   // PRBS 9 sequence
  #define PAYLOAD_TYPE   SEQUENCE_F0

Transmit Packet Type

  #define PACKET_TYPE  15   // Types defined by Bluetooth Core 5.0 spec

Transmit Packet Length

  #define PACKET_LEN  339   // Tx packet length in bytes

Channel numbers

  #define BT_RX_CHNL_NUM  10   // Receive channel number [0 .. 78]
  #define BT_TX_CHNL_NUM  10   // Transmit channel number [0 .. 78]

Scrambler Seed

  #define SCRAMBLER_SEED  0   //  Seed for whitening. Must be set to 0.

Link Type

  #define ACL_LINK  1

Transmit Mode

   #define BURST_MODE       0
   #define CONTINUOUS_MODE  1
   #define TX_MODE          BURST_MODE

Hopping Type

  #define NO_HOPPING      0
  #define FIXED_HOPPING   1
  #define RANDOM_HOPPING  2
  #define HOPPING TYPE    NO_HOPPING

Antenna select

  #define ONBOARD_ANT_SEL  2
  #define EXT_ANT_SEL      3
  #define ANT_SEL          EXT_ANT_SEL

RF Type

   #define BLE_EXTERNAL_RF  0
   #define BLE_INTERNAL_RF  1
   #define RF_TYPE          BLE_INTERNAL_RF

RF Chain

  #define NO_CHAIN_SEL       0
  #define WLAN_HP_CHAIN_BIT  0
  #define WLAN_LP_CHAIN_BIT  1
  #define BT_HP_CHAIN_BIT    2
  #define BT_LP_CHAIN_BIT    3
  #define RF_CHAIN           BT_HP_CHAIN_BIT

PLL Mode

  #define PLL_MODE_0  0
  #define PLL_MODE_1  1
  #define PLL_MODE    PLL_MODE_0

Loopback Mode

  #define LOOP_BACK_MODE_DISABLE  0
  #define LOOP_BACK_MODE_ENABLE   1
  #define LOOP_BACK_MODE          LOOP_BACK_MODE_DISABLE

Memory Usage Requirements

   #define BT_GLOBAL_BUFF_LEN  15000  // The number of bytes required by the application and driver

Modifications to `rsi_ble_config.h`#

Modifications are not needed to run this example, the following is for informational purposes only.

Opermode command parameters

   #define RSI_FEATURE_BIT_MAP             FEAT_SECURITY_OPEN
   #define RSI_TCP_IP_BYPASS               RSI_DISABLE
   #define RSI_TCP_IP_FEATURE_BIT_MAP      TCP_IP_FEAT_DHCPV4_CLIENT
   #define RSI_CUSTOM_FEATURE_BIT_MAP      FEAT_CUSTOM_FEAT_EXTENTION_VALID
   #define RSI_EXT_CUSTOM_FEATURE_BIT_MAP  0

Testing the Application#

Loading the RS9116W Firmware#

Refer Getting started with PC to load the firmware into RS9116W EVK. The firmware binary is located in <SDK>/firmware/

Building the Application on the Host Platform#

EFX32 Platform

Refer to EFx32 Getting Started, to setup EFR32 & EFM32 host platforms.

Import the EFR32/EFM32 project from <SDK>/examples/eatured/bt_per/projects
- Select the appropriate .slsproj to suit your EFRx32 radioboard OR select the *.brd2204a-gg11.slsproj project for the EFM32GG11 board.
Compile and flash the project to the EFx32
Debug the project and pause execution
If the RS9116W reset pin is NOT connected to the EFx32, press the RS9116W EVK Reset button
Free run the project
Proceed to Verifying Operation

STM32 Platform

Refer STM32 Getting Started

Open the project <SDK>/examples/featured/bt_per/projects/bt_per-nucleo-f411re.uvprojx in Keil IDE.
Build and Debug the project, pause execution
If the RS9116W reset pin is NOT connected to the STM32, press the RS9116W EVK reset button
Run the project on the STM32
Proceed to Verifying Operation

Veryifying Operation#

A terminal output shows the following text during receive testing. Receive PER statistics are regularly printed to the terminal. Prints in Coolterm window

A terminal output shows the following text during transmit testing. Prints in Coolterm window

When transmitting, a spectrum analyser may be used to see transmitted packets (and the transmit spectrum) as shown in the following image.
Figure: Spectrum Analyzer BR Mode