Yoshio Miyakawa
BLE demo for the Cycling Power service.
Dependencies: BLE_API mbed nRF51822
Diff: CyclingPowerService.h
- Revision:
- 0:d9d7edb1ddfc
- Child:
- 1:e2e4def8a6bb
diff -r 000000000000 -r d9d7edb1ddfc CyclingPowerService.h
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/CyclingPowerService.h Sat Feb 27 12:27:48 2016 +0000
@@ -0,0 +1,268 @@
+/*
+Copyright (c) 2016 Y. Miyakawa
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+and associated documentation files (the "Software"), to deal in the Software without restriction,
+including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
+and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so,
+subject to the following conditions:
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#ifndef __BLE_CYCLING_POWER_SERVICE_H__
+#define __BLE_CYCLING_POWER_SERVICE_H__
+
+#include "ble/BLE.h"
+
+#define UUID_CYCLING_POWER_SERVICE 0x1818
+#define UUID_SENSOR_LOCATION_CHAR 0x2A5D
+#define UUID_CYCLING_POWER_MEASUREMENT_CHAR 0x2A63
+#define UUID_CYCLING_POWER_FEATURE_CHAR 0x2A65
+#define UUID_CYCLING_POWER_VECTOR_CHAR 0x2A64
+#define UUID_CYCLING_POWER_CONTROL_POINT_CHAR 0x2A66
+
+
+/**
+* @class CyclingPowerService
+* @brief BLE Service for CyclingPower. <br>
+* Service: https://developer.bluetooth.org/gatt/services/Pages/ServiceViewer.aspx?u=org.bluetooth.service.cycling_power.xml <br>
+* CyclingPower Char: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.cycling_power_measurement.xml <br>
+* Location: https://developer.bluetooth.org/gatt/characteristics/Pages/CharacteristicViewer.aspx?u=org.bluetooth.characteristic.sensor_location.xml
+*/
+class CyclingPowerService {
+public:
+ enum {
+ LOCATION_OTHER = 0,
+ LOCATION_TOP_OF_SHOE,
+ LOCATION_IN_SHOE,
+ LOCATION_HIP,
+ LOCATION_FRONT_WHEEL,
+ LOCATION_LEFT_CRANK,
+ LOCATION_RIGHT_CRANK,
+ LOCATION_LEFT_PEDAL,
+ LOCATION_RIGHT_PEDAL,
+ LOCATION_FRONT_HUB,
+ LOCATION_REAR_DROPOUT,
+ LOCATION_CHAINSTAY,
+ LOCATION_REAR_WHEEL,
+ LOCATION_REAR_HUB,
+ LOCATION_CHEST,
+ };
+
+ enum {
+ FEATURE_PEDAL_POWER_BALANCE = 0x00000001,
+ FEATURE_ACCUMULATED_TORQUE = 0x00000002,
+ FEATURE_WHEEL_REVOLUTION_DATA = 0x00000004,
+ FEATURE_CRANK_REVOLUTION_DATA = 0x00000008,
+ FEATURE_EXTREME_MAGNITUDES = 0x00000010,
+ FEATURE_EXTREME_ANGLES = 0x00000020,
+ FEATURE_TOP_AND_BOTTOM_DEAD_SPOT_ANGLES = 0x00000040,
+ FEATURE_ACCUMULATED_ENERGY = 0x00000080,
+ FEATURE_OFFSET_COMPENSATION_INDICATOR = 0x00000100,
+ FEATURE_OFFSET_COMPENSATION = 0x00000200,
+ FEATURE_MEASUREMENT_CONTENT_MASKING = 0x00000400,
+ FEATURE_MULTIPLE_SENSOR_LOCATIONS = 0x00000800,
+ FEATURE_CRANK_LENGTH_ADJUSTMENT = 0x00001000,
+ FEATURE_CHAIN_LENGTH_ADJUSTMENT = 0x00002000,
+ FEATURE_CHAIN_WEIGHT_ADJUSTMENT = 0x00004000,
+ FEATURE_SPAN_LENGTH_ADJUSTMENT = 0x00008000,
+ FEATURE_SENSOR_MEASUREMENT_TORQUE_BASED = 0x00010000,
+ FEATURE_INSTANTANEOUS_MEASUREMENT_DIRECTION = 0x00020000,
+ FEATURE_FACTORY_CALIBRATION_DATE = 0x00040000,
+ };
+
+ enum {
+ FLAG_PEDAL_POWER_BALANCE_PRESENT = 0x0001,
+ FLAG_PEDAL_POWER_BALANCE_REFERENCE_LEFT = 0x0002,
+ FLAG_ACCUMULATED_TORQUE_PRESENT = 0x0004,
+ FLAG_ACCUMULATED_TORQUE_SOURCE_CRANK_BASED = 0x0008,
+ FLAG_WHEEL_REVOLUTION_DATA_PRESENT = 0x0010,
+ FLAG_CRANK_REVOLUTION_DATA_PRESENT = 0x0020,
+ FLAG_EXTREME_FORCE_MAGNITUDES_PRESENT = 0x0040,
+ FLAG_EXTREME_TORQUE_MAGNITUDES_PRESENT = 0x0080,
+ FLAG_EXTREME_ANGLES_PRESENT = 0x0100,
+ FLAG_TOP_DEAD_SPOT_ANGLE_PRESENT = 0x0200,
+ FLAG_BOTTOM_DEAD_SPOT_ANGLE_PRESENT = 0x0400,
+ FLAG_ACCUMULATED_ENERGY_PRESENT = 0x0800,
+ FLAG_OFFSET_COMPENSATION_INDICATOR = 0x1000,
+ };
+
+ enum {
+ OPCODE_SET_CUMULATIVE_VALUE = 1,
+ OPCODE_UPDATE_SENSOR_LOCATION = 2,
+ OPCODE_REQUEST_SUPPORTED_SENSOR_LOCATIONS = 3,
+ OPCODE_SET_CRANK_LENGTH = 4,
+ OPCODE_REQUEST_CRANK_LENGTH = 5,
+ OPCODE_SET_CHAIN_LENGTH = 6,
+ OPCODE_REQUEST_CHAIN_LENGTH = 7,
+ OPCODE_SET_CHAIN_WEIGHT = 8,
+ OPCODE_REQUEST_CHAIN_WEIGHT = 9,
+ OPCODE_SET_SPAN_LENGTH = 10,
+ OPCODE_REQUEST_SPAN_LENGTH = 11,
+ OPCODE_START_OFFSET_COMPENSATION = 12,
+ OPCODE_MASK_CYCLING_POWER_MEASUREMENT_CHARACTERISTIC_CONTENT = 13,
+ OPCODE_REQUEST_SAMPLING_RATE = 14,
+ OPCODE_REQUEST_FACTORY_CALIBRATION_DATE = 15,
+ OPCODE_RESPONSE_CODE = 32,
+ };
+
+ enum {
+ RESPONSE_SUCCESS = 1,
+ RESPONSE_OP_CODE_NOT_SUPPORTED,
+ RESPONSE_INVALID_PARAMETER,
+ RESPONSE_OPERATION_FAILED,
+ };
+
+public:
+ CyclingPowerService(BLE &_ble, uint32_t feature, uint8_t location) :
+ ble(_ble),
+ cyclingPowerMeasurement(UUID_CYCLING_POWER_MEASUREMENT_CHAR, measureData,
+ MAX_MEASURE_BYTES, MAX_MEASURE_BYTES,
+ GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY),
+ cyclingPowerControlPoint(UUID_CYCLING_POWER_CONTROL_POINT_CHAR, controlData,
+ MAX_CONTROL_BYTES, MAX_CONTROL_BYTES,
+ GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_WRITE | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_INDICATE),
+ cyclingPowerFeature(UUID_CYCLING_POWER_FEATURE_CHAR, &feature),
+ cyclingPowerLocation(UUID_SENSOR_LOCATION_CHAR, &location) {
+ setupService();
+ }
+
+ void updateCyclingPower(uint16_t flags, int16_t pwr, uint8_t bal, int16_t maxTorque, int16_t minTorque, uint16_t dnw, uint16_t dtw, uint16_t dnc, uint16_t dtc) {
+ instantaneousPower = pwr;
+ pedalPowerBalance = bal;
+ maximumTorqueMagnitude = maxTorque;
+ minimumTorqueMagnitude = minTorque;
+
+ cumulativeWheelRev += dnw;
+ lastWheelEventTime += dtw;
+ cumulativeCrankRev += dnc;
+ lastCrankEventTime += dtc;
+
+ unsigned i = 0;
+ measureData[i++] = (uint8_t)(flags & 0xFF);
+ measureData[i++] = (uint8_t)(flags >> 8);
+
+ measureData[i++] = (uint8_t)(instantaneousPower & 0xFF);
+ measureData[i++] = (uint8_t)(instantaneousPower >> 8);
+
+ if (flags & FLAG_PEDAL_POWER_BALANCE_PRESENT) {
+ measureData[i++] = pedalPowerBalance;
+ }
+ if (flags & FLAG_WHEEL_REVOLUTION_DATA_PRESENT) {
+ measureData[i++] = (uint8_t)(cumulativeWheelRev & 0xFF);
+ measureData[i++] = (uint8_t)((cumulativeWheelRev >> 8) & 0xFF);
+ measureData[i++] = (uint8_t)((cumulativeWheelRev >> 16) & 0xFF);
+ measureData[i++] = (uint8_t)((cumulativeWheelRev >> 24) & 0xFF);
+
+ measureData[i++] = (uint8_t)(lastWheelEventTime & 0xFF);
+ measureData[i++] = (uint8_t)(lastWheelEventTime >> 8);
+ }
+ if (flags & FLAG_CRANK_REVOLUTION_DATA_PRESENT) {
+ measureData[i++] = (uint8_t)(cumulativeCrankRev & 0xFF);
+ measureData[i++] = (uint8_t)(cumulativeCrankRev >> 8);
+
+ measureData[i++] = (uint8_t)(lastCrankEventTime & 0xFF);
+ measureData[i++] = (uint8_t)(lastCrankEventTime >> 8);
+ }
+ if (flags & FLAG_EXTREME_TORQUE_MAGNITUDES_PRESENT) {
+ measureData[i++] = (uint8_t)(maximumTorqueMagnitude & 0xFF);
+ measureData[i++] = (uint8_t)(maximumTorqueMagnitude >> 8);
+
+ measureData[i++] = (uint8_t)(minimumTorqueMagnitude & 0xFF);
+ measureData[i++] = (uint8_t)(minimumTorqueMagnitude >> 8);
+ }
+ unsigned nbyte = i;
+ ble.updateCharacteristicValue(cyclingPowerMeasurement.getValueAttribute().getHandle(), measureData, nbyte);
+ }
+
+ void indicateResponse(uint8_t opCode, uint8_t responseValue) {
+ controlData[0] = 0x20; // Response Code
+ controlData[1] = opCode;
+ controlData[2] = responseValue;
+ unsigned nbyte = 3;
+ ble.updateCharacteristicValue(cyclingPowerControlPoint.getValueAttribute().getHandle(), controlData, nbyte);
+ }
+
+ void indicateResponse(uint8_t opCode, uint8_t responseValue, uint16_t responseParameter) {
+ controlData[0] = 0x20; // Response Code
+ controlData[1] = opCode;
+ controlData[2] = responseValue;
+ controlData[3] = (uint8_t)(responseParameter & 0xFF);
+ controlData[4] = (uint8_t)(responseParameter >> 8);
+ unsigned nbyte = 5;
+ ble.updateCharacteristicValue(cyclingPowerControlPoint.getValueAttribute().getHandle(), controlData, nbyte);
+ }
+
+ virtual void onDataWritten(const GattWriteCallbackParams *params) {
+ if (params->handle == cyclingPowerControlPoint.getValueAttribute().getHandle()) {
+ uint32_t uu;
+ uint8_t opCode = params->data[0];
+ switch(opCode) {
+ case OPCODE_SET_CUMULATIVE_VALUE:
+ uu = params->data[4];
+ uu *= 256;
+ uu += params->data[3];
+ uu *= 256;
+ uu += params->data[2];
+ uu *= 256;
+ uu += params->data[1];
+ cumulativeWheelRev = uu;
+ indicateResponse(opCode, CyclingPowerService::RESPONSE_SUCCESS);
+ break;
+ default:
+ indicateResponse(opCode, CyclingPowerService::RESPONSE_OP_CODE_NOT_SUPPORTED);
+ }
+ }
+ }
+
+protected:
+ void setupService(void) {
+ instantaneousPower = 0;
+ pedalPowerBalance = 50 * 2; // 50%
+ maximumTorqueMagnitude = 0;
+ minimumTorqueMagnitude = 0;
+
+ cumulativeWheelRev = 0;
+ lastWheelEventTime = 0;
+ cumulativeCrankRev = 0;
+ lastCrankEventTime = 0;
+
+ GattCharacteristic *charTable[] = {&cyclingPowerMeasurement, &cyclingPowerFeature, &cyclingPowerLocation, &cyclingPowerControlPoint};
+ GattService cyclingPowerService(UUID_CYCLING_POWER_SERVICE, charTable, sizeof(charTable) / sizeof(GattCharacteristic *));
+
+ ble.addService(cyclingPowerService);
+ ble.onDataWritten(this, &CyclingPowerService::onDataWritten);
+ }
+
+protected:
+ BLE &ble;
+
+ GattCharacteristic cyclingPowerMeasurement;
+ GattCharacteristic cyclingPowerControlPoint;
+ ReadOnlyGattCharacteristic<uint32_t> cyclingPowerFeature;
+ ReadOnlyGattCharacteristic<uint8_t> cyclingPowerLocation;
+
+ static const unsigned MAX_MEASURE_BYTES = 19;
+ static const unsigned MAX_CONTROL_BYTES = 5;
+
+ uint8_t measureData[MAX_MEASURE_BYTES];
+ uint8_t controlData[MAX_CONTROL_BYTES];
+
+ int16_t instantaneousPower;
+ uint8_t pedalPowerBalance;
+ int16_t maximumTorqueMagnitude;
+ int16_t minimumTorqueMagnitude;
+
+ uint32_t cumulativeWheelRev;
+ uint16_t lastWheelEventTime;
+ uint16_t cumulativeCrankRev;
+ uint16_t lastCrankEventTime;
+};
+
+#endif /* #ifndef __BLE_CYCLING_POWER_SERVICE_H__*/