lmt01.h

00001 /* Copyright (c) 2017 Philippe Kalaf, MIT License
00002  *
00003  * Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
00004  * and associated documentation files (the "Software"), to deal in the Software without restriction, 
00005  * including without limitation the rights to use, copy, modify, merge, publish, distribute, 
00006  * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is 
00007  * furnished to do so, subject to the following conditions:
00008  *
00009  * The above copyright notice and this permission notice shall be included in all copies or 
00010  * substantial portions of the Software.
00011  *
00012  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING 
00013  * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 
00014  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
00015  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
00016  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00017  */
00018 
00019 /* LMT01 temperature sensor driver */
00020 
00021 #ifndef lmt01_h
00022 #define lmt01_h
00023 
00024 #include "mbed.h"
00025 
00026 class LMT01 
00027 {
00028 public:
00029     LMT01(PinName pin);
00030 
00031     static const int _pulse_temp_table[20][2];
00032 
00033     int read_int();
00034     float read();
00035     uint16_t get_last_pulse_count();
00036 
00037 private:
00038     InterruptIn _interrupt;
00039     volatile uint16_t _pulse_count;
00040     volatile uint16_t _last_pulse_count;
00041     // temperature in 10^3 Celsius
00042     volatile int _temperature;
00043     Thread _worker_thread;
00044 
00045     void _worker();
00046     void _increment();
00047 };
00048 
00049 #endif// lmt01_h