BTLE demo for MAXWSNENV.
Dependencies: BLE_API BMP180 Si7020 mbed MaximBLE
PressureChar.h
- Committer:
- enginerd
- Date:
- 2016-08-18
- Revision:
- 2:6f76d6160601
- Parent:
- 0:f71931ae3db1
File content as of revision 2:6f76d6160601:
/******************************************************************************* * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved. * * 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 MAXIM INTEGRATED 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. * * Except as contained in this notice, the name of Maxim Integrated * Products, Inc. shall not be used except as stated in the Maxim Integrated * Products, Inc. Branding Policy. * * The mere transfer of this software does not imply any licenses * of trade secrets, proprietary technology, copyrights, patents, * trademarks, maskwork rights, or any other form of intellectual * property whatsoever. Maxim Integrated Products, Inc. retains all * ownership rights. ******************************************************************************* */ #ifndef __BLE_PRESSURECHAR_H__ #define __BLE_PRESSURECHAR_H__ #include "Characteristic.h" #include "UUID.h" /** * @class PressureChar * @brief PressureChar characteristic class. * @details Sub class from the characteristic class. */ class PressureChar : public Characteristic { public: typedef enum { PRES_UNIT_KPA, PRES_UNIT_ATM, PRES_UNIT_MMHG } pres_unit_t; static const unsigned OFFSET_OF_FLAGS = 0; static const unsigned OFFSET_OF_VALUE = OFFSET_OF_FLAGS + 1; static const unsigned OFFSET_OF_TIME = OFFSET_OF_VALUE + 4; static const unsigned CHAR_BYTES = (1 + 4 + TIMESTAMP_BYTES); static const unsigned UNIT_FLAG_POS = 0; static const unsigned UNIT_FLAG_MSK = (0x3 << UNIT_FLAG_POS); static const unsigned TIMESTAMP_FLAG_POS = 2; static const unsigned TIMESTAMP_FLAG_MSK = (0x1 << TIMESTAMP_FLAG_POS); PressureChar(pres_unit_t unit) : gattChar(charUUID, bytes, CHAR_BYTES, CHAR_BYTES, GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ | GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_NOTIFY) { // Default no timestamp and zero for the value memset(bytes, 0x0, CHAR_BYTES); bytes[OFFSET_OF_FLAGS] = ((unit << UNIT_FLAG_POS) | (false << TIMESTAMP_FLAG_POS)); } ~PressureChar() {} virtual GattCharacteristic *getChar(void) { return &gattChar; } virtual uint8_t getNumBytes(void) { return CHAR_BYTES; } virtual uint8_t *getBytes(void) { return bytes; } // Update the characteristic value void update(float value, time_t time = 0) { // Convert value to bytes pres_unit_t unit = (pres_unit_t)(bytes[UNIT_FLAG_POS] & UNIT_FLAG_MSK); uint32_t value_bytes; if(unit == PRES_UNIT_KPA || unit == PRES_UNIT_MMHG) { value_bytes = float_bytes(value, 2); } else { value_bytes = float_bytes(value, 4); } memcpy(&bytes[OFFSET_OF_VALUE], &value_bytes, sizeof(uint32_t)); if (time != 0) { // Set timestamp flag bytes[OFFSET_OF_FLAGS] |= TIMESTAMP_FLAG_MSK; // Convert time_t date_time(time, &bytes[OFFSET_OF_TIME]); } else { // Clear timestamp flag bytes[OFFSET_OF_FLAGS] &= ~TIMESTAMP_FLAG_MSK; } } private: GattCharacteristic gattChar; uint8_t bytes[CHAR_BYTES]; static const uint8_t charUUID[]; }; // a8c094be-5b5e-4791-b2db-e9ccd2ff3442 const uint8_t PressureChar::charUUID[] = {0x42,0x34,0xff,0xd2,0xcc,0xe9,0xdb,0xb2,0x91,0x47,0x5e,0x5b,0xbe,0x94,0xc0,0xa8}; #endif /* #ifndef __BLE_PRESSURECHAR_H__*/