Line data    Source code

       1             : /*
       2             :    This program is free software: you can redistribute it and/or modify
       3             :    it under the terms of the GNU General Public License as published by
       4             :    the Free Software Foundation, either version 3 of the License, or
       5             :    (at your option) any later version.
       6             : 
       7             :    This program is distributed in the hope that it will be useful,
       8             :    but WITHOUT ANY WARRANTY; without even the implied warranty of
       9             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      10             :    GNU General Public License for more details.
      11             : 
      12             :    You should have received a copy of the GNU General Public License
      13             :    along with this program.  If not, see <http://www.gnu.org/licenses/>.
      14             :  */
      15             : 
      16             : /*
      17             :  * I2C driver for Measurement Specialties MEAS TSYS01 digital temperature sensor
      18             :  */
      19             : 
      20             : #pragma once
      21             : #include "AP_TemperatureSensor_Backend.h"
      22             : 
      23             : #ifndef AP_TEMPERATURE_SENSOR_TSYS01_ENABLED
      24             : #define AP_TEMPERATURE_SENSOR_TSYS01_ENABLED AP_TEMPERATURE_SENSOR_ENABLED
      25             : #endif
      26             : 
      27             : #if AP_TEMPERATURE_SENSOR_TSYS01_ENABLED
      28             : 
      29             : #define TSYS01_ADDR_CSB0 0x77
      30             : #define TSYS01_ADDR_CSB1 0x76
      31             : 
      32             : class AP_TemperatureSensor_TSYS01 : public AP_TemperatureSensor_Backend {
      33             :     using AP_TemperatureSensor_Backend::AP_TemperatureSensor_Backend;
      34             : 
      35             : public:
      36             :     __INITFUNC__ void init(void) override;
      37             : 
      38       27101 :     void update() override {};
      39             : 
      40             : 
      41             : private:
      42             :     uint16_t _k[5];         // internal calibration for temperature calculation
      43             : 
      44             :     // reset device
      45             :     bool reset(void) const;
      46             : 
      47             :     // read (relevant) internal calibration registers into _k
      48             :     bool read_prom(void);
      49             :     uint16_t read_prom_word(const uint8_t word) const;
      50             : 
      51             :     // begin an ADC conversion (min:7.40ms typ:8.22ms max:9.04ms)
      52             :     void start_next_sample();
      53             :     uint32_t read_adc(void) const;
      54             : 
      55             :     // update the temperature, called at 20Hz
      56             :     void _timer(void);
      57             : 
      58             :     // calculate temperature using adc reading and internal calibration
      59             :     float calculate(const uint32_t adc) const;
      60             : };
      61             : #endif // AP_TEMPERATURE_SENSOR_TSYS01_ENABLED