BTLE demo for MAXWSNENV.
Dependencies: BLE_API BMP180 Si7020 mbed MaximBLE
LogCharacteristic.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 __LOG_CHARACTERISTIC_H__ #define __LOG_CHARACTERISTIC_H__ #ifndef FIFO_SIZE #define FIFO_SIZE 768 #endif // 92e53a24-c294-406c-b64b-b401ae2e9982 static const uint8_t LogCharUUID[] = { 0x82,0x99,0x2e,0xae,0x01,0xb4,0x4b,0xb6,0x6c,0x40,0x94,0xc2,0x24,0x3a,0xe5,0x92 }; class LogCharacteristic { public: typedef struct { float value; time_t time; } qElement_t; LogCharacteristic(void) : numValues(0), gattChar(LogCharUUID, (uint8_t*)&numValues, sizeof(numValues), sizeof(numValues), GattCharacteristic::BLE_GATT_CHAR_PROPERTIES_READ) { clear(); } GattCharacteristic* getChar(void) { return &gattChar; } /** * @brief Clear the log */ void clear(void) { // atomic FIFO access __disable_irq(); rindex = 0; windex = 0; numValues = 0; __enable_irq(); } /** * @brief Add a new element to the log * @param element to add to the log */ void put(qElement_t element) { // Check if FIFO is full if (numValues == FIFO_SIZE) { fifoReduce(); } // atomic FIFO access __disable_irq(); // Put data into FIFO element_fifo[windex] = element; // Increment pointer windex++; if (windex == FIFO_SIZE) { windex = 0; } numValues++; __enable_irq(); } /** * @brief Get the oldest element from the log * @return element from the log */ qElement_t get(void) { qElement_t element = {0}; // Check if empty if (numValues == 0) { return element; } // atomic FIFO access __disable_irq(); // Get data from FIFO element = element_fifo[rindex]; // Increment pointer rindex++; if (rindex == FIFO_SIZE) { rindex = 0; } numValues--; __enable_irq(); return element; } /** * @brief Get the length of the log * @return length of the log */ int len(void) { return numValues; } private: // Remove every other element from the FIFO void fifoReduce(void) { // atomic FIFO access __disable_irq(); // i is the number of reductions int i = 0; while(i < (FIFO_SIZE/2)){ // Position of new value has not rolled over if(rindex+i < FIFO_SIZE) { // Position of reduced value has not rolled over if(rindex+2*i < FIFO_SIZE) { element_fifo[rindex+i] = element_fifo[rindex+2*i]; } // Position of reduced value has rolled over else { element_fifo[rindex+i] = element_fifo[rindex+2*i-FIFO_SIZE]; } } // Position of new value has rolled over else { element_fifo[rindex+i-FIFO_SIZE] = element_fifo[rindex+2*i-FIFO_SIZE]; } i++; } if(rindex < FIFO_SIZE/2) { windex = rindex + FIFO_SIZE/2; } else { windex = rindex - FIFO_SIZE/2; } numValues = FIFO_SIZE/2; __enable_irq(); } uint16_t numValues; GattCharacteristic gattChar; // FIFO variables unsigned int rindex; unsigned int windex; qElement_t element_fifo[FIFO_SIZE]; }; #endif /* __LOG_CHARACTERISTIC_H__ */