Microchip® Advanced Software Framework

 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
BLOOD PRESSURE SENSOR Example

Introduction

**************************** Introduction *********************************

  • The Blood Pressure example application bring-up the Blood Pressure profile defined by the Bluetooth SIG.
  • The Blood Pressure Profile (BLP) enables a device to connect and interact with a Blood Pressure Sensor device that is used in consumer and professional health care applications.
  • This example demonstrates a Blood Pressure Sensor application (GATT Server role).

Blood Pressure Measurements -

  • The Intermediate Cuff Pressure characteristic may be notified frequently during the course of a measurement so that a receiving device can effectively update the display on its user interface during the measurement process. When the Client Characteristic Configuration descriptor is configured for indications and Blood Pressure measurement is available, this characteristic shall be indicated while in a connection. The Blood Pressure Measurement Application, which is the GATT server, will hold the characteristics and send the measurement values to the Blood Pressure Monitor.
  • The Blood Pressure Measurement characteristic shall be used to send Blood Pressure measurements
  • The Intermediate Cuff Pressure characteristic is used to send Current Cuff Pressure values to a device for display purposes while the measurement is in progress
  • The Blood Pressure Feature characteristic shall be used to describe the supported features of the Blood Pressure Sensor
  • ATBTLC1000 together with the host MCU simulates a Blood Pressure Sensor (GATT Server Role) and sends simulated values to the Blood Pressure Monitor (Smart Connect mobile application).

Supported Evolution Kit -

  • ATSAML21-XPRO-B + ATBTLC1000 XPRO
  • ATSAMD21-XPRO + ATBTLC1000 XPRO
  • ATSAMG55-XPRO + ATBTLC1000 XPRO
  • ATSAM4S-XPRO + ATBTLC1000 XPRO

Running the Demo -

  • 1. Build and flash the binary into supported evaluation board.
  • 2. Open the console using TeraTerm or any serial port monitor.
  • 3. Press the Reset button.
  • 4. Wait for around 10 seconds for the patches to be downloaded device will initialize and start-up.
  • 5. The device is now in advertising mode.
  • 6. On a BLE compatibl iPhoneŽ/Android phone, enable Bluetooth in the Settings page. Start the Atmel Smart Connect App and scan for devices. ATMEL-BLP will be appear among the devices scanned. Click on ATMEL-BLP to connect to supported platform.
  • 7. Once connected, the client side will request for the pairing procedure . The console log provides a guidance for the user to enter the pass-key.
  • 8. Upon entering the Blood Pressure service page, the mobile application will enable the notifications and indications for interim cuff pressure and blood pressure characteristics respectively. The blood pressure sensor device simulated by ATBTLC1000 will send the current blood pressure values after receiving the indications enabling request.
  • 9. The SW0 button can be used on XPRO Board to receive updated blood pressure measurements. The blood pressure sensor will first sends the interim cuff pressure values as notifications and then sends the final blood pressure measurements as an indication. The blood pressure measurements sent by blood pressure sensor are simulated values.
  • 10. The Atmel Smart Connect mobile App for Android also implements the same features and provides the same look and feel. Henceforth incase if a BLE compatible Android phone is used, the demo instructions from the mobile app perspective remains the same as above.

Modules

***************************** Modules **************************************

  • BLE Manger -
    • The Event Manager is responsible for handling the following:
      • Generic BLE Event Handling:-
        • BLE Event Manager handles the events triggered by BLE stack and also responsible for invoking all registered callbacks for respective events. BLE Manager handles all GAP related functionality. In addition to that handles multiple connection instances, Pairing, Encryption, Scanning.
      • Handling Multi-role/multi-connection:-
        • BLE Event Manager is responsible for handling multiple connection instances and stores bonding information and Keys to retain the bonded device. BLE Manager is able to identify and remove the device information when pairing/encryption gets failed. In case of multi-role, it handles the state/event handling of both central and peripheral in multiple contexts.
      • Controlling the Advertisement data:-
        • BLE Event Manager is responsible for generating the advertisement and scan response data for BLE profiles/services that are attached with BLE Manager.
  • BLE Services -
    • This service exposes blood pressure and other data from a blood pressure monitor intended for healthcare applications.
    • The BLOOD PRESSURE Service exposes blood pressure and other data related to a blood pressure monitor.
    • Blood Pressure service has three characteristics:
      • Blood Pressure Measurement:
        • The BLOOD PRESSURE MEASUREMENT characteristic is used to send a Blood Pressure measurement.
      • Intermediate Cuff Pressure:
        • The INTERMEDIATE CUFF PRESSURE characteristic is used to send intermediate Cuff Pressure values to a device for display purposes while the measurement is in progress.
      • Blood Pressure Feature:
        • The Blood Pressure Feature characteristic is used to describe the supported features of the Blood Pressure Sensor.
  • BLE Platform Services -
    • Interface Settings -
      • Connect ATBTLC1000 XPRO to SAML21-XPRO-B -> EXT1
      • Connect ATBTLC1000 XPRO to SAMD21-XPRO -> EXT1
      • Connect ATBTLC1000 XPRO to SAMG55-XPRO -> EXT1
      • Connect ATBTLC1000 XPRO to SAM4S-XPRO -> EXT1
    • Serial Console COM port settings -
      • Baudrate 115200
        • Parity None, Stop Bit 1, Start Bit 1
        • No Hardware Handshake
      • 6-Wire Mode Connection Setup -
      • Pins are 1:1 match with SAML21/D21 Xpro EXT1 Header to BTLC1000 XPro Header
        • UART(No Flow Control)-SAM L21/D21 XPro Pins (Rx-Pin13, Tx-Pin14)
        • UART(With Flow Control)-SAM G55 Xpro Pins (Rx-Pin13, Tx-Pin14, RTS-Pin5, CTS-Pin6, Rx-Pin16, Tx-Pin17)
        • BTLC1000 Wakeup Pin-SAM G55 XPro Pins(Pin4)
        • BTLC1000 Chip Enable Pin-SAM G55 XPro Pins(Pin10)
        • BTLC1000 Vcc Pin-SAM L21/D21/G55 Xpro Pins(Pin20)
        • BTLC1000 GND Pin-SAM L21/D21/G55 Xpro Pins(Pin19)
    • 4-Wire Mode Connection setup -
      • UART(With Flow Control)-SAM L21/D21 XPro Pins (Rx-Pin15, Tx-Pin17, RTS-Pin16, CTS-Pin18)
      • BTLC1000 Wakeup Pin-SAM L21/D21 XPro Pins (Rx-Pin6)
      • BTLC1000 Chip Enable Pin-SAM L21/D21 XPro Pins (Rx-Pin4)
      • UART(With Flow Control)-SAM G55/4S Xpro Pins (Rx-Pin13, Tx-Pin14, RTS-Pin5, CTS-Pin6)
      • BTLC1000 Wakeup Pin-SAM G55/4S XPro Pins(Pin4)
      • BTLC1000 Chip Enable Pin-SAM G55/4S XPro Pins(Pin10)
      • BTLC1000 Vcc Pin-SAM L21/D21/G55/4S Xpro Pins(Pin20)
      • BTLC1000 GND Pin-SAM L21/D21/G55/4S Xpro Pins(Pin19)

SDK Package

***************************** BLE SDK Package ******************************************

Generated on Fri Mar 4 2022 23:24:48 for Blood Pressure Sensor Application- SAM D21 Xplained Pro by   doxygen 1.8.5