Delta / Mbed OS BLE_BloodPressure_Demo Featured

For Blood Pressure Demo

BLE_BloodPressure_demo implements Blood Pressure Service which enables a collector device to connect and interact with it. the service spec can be found here. User can download the APP 'nRF Connect' or 'nRF Toolbox' available in both App Store and Google Play to scan the adverting and connect to the module.

BloodPressureService.h@0:546d7178e278, 2015-05-29 (annotated)

Committer:
Marcomissyou
Date:
Fri May 29 07:26:36 2015 +0000
Revision:
0:546d7178e278
Child:
1:fc03791a9842
First commit; For Blood Pressure Demo

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Marcomissyou 0:546d7178e278 1 #include "BLEDevice.h"
Marcomissyou 0:546d7178e278 2 //#include "Gap.h"
Marcomissyou 0:546d7178e278 3
Marcomissyou 0:546d7178e278 4 /*
Marcomissyou 0:546d7178e278 5 * @This example can be demonstrated with Blood Pressure Android App downloaded from
Marcomissyou 0:546d7178e278 6 * @https://github.com/Marcomissyou/BluetoothLeBooldPressure.git
Marcomissyou 0:546d7178e278 7 * @Author: Marco.Hsu
Marcomissyou 0:546d7178e278 8 * @Email: marco.missyou@gmail.com
Marcomissyou 0:546d7178e278 9 */
Marcomissyou 0:546d7178e278 10 class BloodPressureService {
Marcomissyou 0:546d7178e278 11 public:
Marcomissyou 0:546d7178e278 12 BloodPressureService(BLEDevice &_ble, float Systolic, float Diastolic, float mean_arterial, uint16_t BloodFeature):
Marcomissyou 0:546d7178e278 13 ble(_ble),
Marcomissyou 0:546d7178e278 14 BloodPressureValue(Systolic, Diastolic, mean_arterial),
Marcomissyou 0:546d7178e278 15 BloodFeatureValue(BloodFeature),
Marcomissyou 0:546d7178e278 16 //GlucoseFeatureValue(GluFeature),
Marcomissyou 0:546d7178e278 17 BloodPressureGatt(GattCharacteristic::UUID_BLOOD_PRESSURE_MEASUREMENT_CHAR, BloodPressureValue.getPointer(),
Marcomissyou 0:546d7178e278 18 sizeof(uint8_t), BloodPressureStruc::MAX_VALUE_BYTES, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE),
Marcomissyou 0:546d7178e278 19 BloodFeature(GattCharacteristic::UUID_BLOOD_PRESSURE_FEATURE_CHAR, &BloodFeatureValue) {
Marcomissyou 0:546d7178e278 20 setupService();
Marcomissyou 0:546d7178e278 21 }
Marcomissyou 0:546d7178e278 22
Marcomissyou 0:546d7178e278 23 void updateBloodPressureMeasurement(float Systolic, float Diastolic, float mean_arterial) {
Marcomissyou 0:546d7178e278 24 BloodPressureValue.uploadBloodPressureValue(Systolic, Diastolic, mean_arterial);
Marcomissyou 0:546d7178e278 25 ble.updateCharacteristicValue(BloodPressureGatt.getValueAttribute().getHandle(), BloodPressureValue.getPointer(), 6);
Marcomissyou 0:546d7178e278 26 }
Marcomissyou 0:546d7178e278 27
Marcomissyou 0:546d7178e278 28
Marcomissyou 0:546d7178e278 29
Marcomissyou 0:546d7178e278 30 private:
Marcomissyou 0:546d7178e278 31 void setupService(void) {
Marcomissyou 0:546d7178e278 32 static bool serviceAdded = false; /* We should only ever need to add the heart rate service once. */
Marcomissyou 0:546d7178e278 33 if (serviceAdded) {
Marcomissyou 0:546d7178e278 34 return;
Marcomissyou 0:546d7178e278 35 }
Marcomissyou 0:546d7178e278 36
Marcomissyou 0:546d7178e278 37 GattCharacteristic *charTable[] = {&BloodPressureGatt, &BloodFeature};
Marcomissyou 0:546d7178e278 38 GattService BloodService(GattService::UUID_BLOOD_PRESSURE_SERVICE, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
Marcomissyou 0:546d7178e278 39
Marcomissyou 0:546d7178e278 40 ble.addService(BloodService);
Marcomissyou 0:546d7178e278 41 serviceAdded = true;
Marcomissyou 0:546d7178e278 42
Marcomissyou 0:546d7178e278 43 }
Marcomissyou 0:546d7178e278 44
Marcomissyou 0:546d7178e278 45 //==========================================================================================================
Marcomissyou 0:546d7178e278 46 private:
Marcomissyou 0:546d7178e278 47 struct BloodPressureStruc {
Marcomissyou 0:546d7178e278 48 static const unsigned MAX_VALUE_BYTES = 8;
Marcomissyou 0:546d7178e278 49 static const unsigned FLAGS_BYTE_INDEX = 0;
Marcomissyou 0:546d7178e278 50
Marcomissyou 0:546d7178e278 51 static const unsigned Blood_Pressure_Units_Flag = 0; // 0 in units of mmHg, 1 in units of kPa
Marcomissyou 0:546d7178e278 52 static const unsigned Time_Stamp_Flag = 0; //
Marcomissyou 0:546d7178e278 53 static const unsigned Pulse_Rate_Flag = 0;
Marcomissyou 0:546d7178e278 54 static const unsigned User_ID_Flag = 0;
Marcomissyou 0:546d7178e278 55 static const unsigned Measurement_Status_Flag = 0;
Marcomissyou 0:546d7178e278 56
Marcomissyou 0:546d7178e278 57 static const unsigned VALUE_FORMAT_BITNUM = 0;
Marcomissyou 0:546d7178e278 58 static const uint8_t VALUE_FORMAT_FLAG = 0;
Marcomissyou 0:546d7178e278 59
Marcomissyou 0:546d7178e278 60 // Initial setting Blood Pressure measurement value
Marcomissyou 0:546d7178e278 61 BloodPressureStruc(float Systolic, float Diastolic, float mean_arterial) : BloodPressureValue() {
Marcomissyou 0:546d7178e278 62 uploadBloodPressureValue(Systolic, Diastolic, mean_arterial);
Marcomissyou 0:546d7178e278 63 }
Marcomissyou 0:546d7178e278 64
Marcomissyou 0:546d7178e278 65 // function to update Blood Pressure measurement value in unit of mmHg
Marcomissyou 0:546d7178e278 66 void uploadBloodPressureValue(float Systolic, float Diastolic, float mean_arterial) {
Marcomissyou 0:546d7178e278 67 uint16_t ieee11073_Systolic = ieee11073_float16(Systolic);
Marcomissyou 0:546d7178e278 68 uint16_t ieee11073_Diastolic = ieee11073_float16(Diastolic);
Marcomissyou 0:546d7178e278 69 uint16_t ieee11073_mean_arterial = ieee11073_float16(mean_arterial);
Marcomissyou 0:546d7178e278 70 BloodPressureValue[FLAGS_BYTE_INDEX] = (Blood_Pressure_Units_Flag << 0)|(Time_Stamp_Flag << 1)|
Marcomissyou 0:546d7178e278 71 (Pulse_Rate_Flag << 2)|(User_ID_Flag << 3)|(Measurement_Status_Flag << 4);
Marcomissyou 0:546d7178e278 72 //memcpy(&BloodPressureValue[FLAGS_BYTE_INDEX], &ieee11073_Systolic, 2);
Marcomissyou 0:546d7178e278 73 //memcpy(&BloodPressureValue[FLAGS_BYTE_INDEX+2], &ieee11073_Diastolic, 2);
Marcomissyou 0:546d7178e278 74 //memcpy(&BloodPressureValue[FLAGS_BYTE_INDEX+4], &ieee11073_mean_arterial, 2);
Marcomissyou 0:546d7178e278 75 BloodPressureValue[FLAGS_BYTE_INDEX + 1] = (uint8_t)(ieee11073_Systolic &0xff);
Marcomissyou 0:546d7178e278 76 BloodPressureValue[FLAGS_BYTE_INDEX + 2] = (uint8_t)(ieee11073_Systolic >> 8);
Marcomissyou 0:546d7178e278 77 BloodPressureValue[FLAGS_BYTE_INDEX + 3] = (uint8_t)(ieee11073_Diastolic &0xff);
Marcomissyou 0:546d7178e278 78 BloodPressureValue[FLAGS_BYTE_INDEX + 4] = (uint8_t)(ieee11073_Diastolic >> 8);
Marcomissyou 0:546d7178e278 79 BloodPressureValue[FLAGS_BYTE_INDEX + 5] = (uint8_t)(ieee11073_mean_arterial &0xff);
Marcomissyou 0:546d7178e278 80 BloodPressureValue[FLAGS_BYTE_INDEX + 6] = (uint8_t)(ieee11073_mean_arterial >>8);
Marcomissyou 0:546d7178e278 81 }
Marcomissyou 0:546d7178e278 82
Marcomissyou 0:546d7178e278 83
Marcomissyou 0:546d7178e278 84 uint8_t *getPointer(void) {
Marcomissyou 0:546d7178e278 85 return BloodPressureValue;
Marcomissyou 0:546d7178e278 86 }
Marcomissyou 0:546d7178e278 87
Marcomissyou 0:546d7178e278 88 const uint8_t *getPointer(void) const {
Marcomissyou 0:546d7178e278 89 return BloodPressureValue;
Marcomissyou 0:546d7178e278 90 }
Marcomissyou 0:546d7178e278 91
Marcomissyou 0:546d7178e278 92 uint16_t ieee11073_float16(float BloodPressure) {
Marcomissyou 0:546d7178e278 93 uint8_t exponent = 0;
Marcomissyou 0:546d7178e278 94 uint16_t mantissa = (uint16_t)BloodPressure;
Marcomissyou 0:546d7178e278 95 return ((exponent << 12)&0xF0) | (mantissa << 0) & 0x0FFF ;
Marcomissyou 0:546d7178e278 96 }
Marcomissyou 0:546d7178e278 97 private:
Marcomissyou 0:546d7178e278 98 uint8_t BloodPressureValue[MAX_VALUE_BYTES];
Marcomissyou 0:546d7178e278 99 };
Marcomissyou 0:546d7178e278 100
Marcomissyou 0:546d7178e278 101
Marcomissyou 0:546d7178e278 102 private:
Marcomissyou 0:546d7178e278 103 BLEDevice &ble;
Marcomissyou 0:546d7178e278 104
Marcomissyou 0:546d7178e278 105 BloodPressureStruc BloodPressureValue;
Marcomissyou 0:546d7178e278 106 GattCharacteristic BloodPressureGatt; // data carrier
Marcomissyou 0:546d7178e278 107
Marcomissyou 0:546d7178e278 108 uint16_t BloodFeatureValue;
Marcomissyou 0:546d7178e278 109 ReadOnlyGattCharacteristic<uint16_t> BloodFeature;
Marcomissyou 0:546d7178e278 110
Marcomissyou 0:546d7178e278 111 };