Added basic bmp280 structure - functional

temperature readout must be added and compensation must be checked
2023-02-08 12:14:27 +01:00
parent 35c940ca5b
commit edeaedeb07
5 changed files with 220 additions and 41 deletions
@@ -39,12 +39,14 @@

 // ProjectIncludes
 // All include files that are provided by the project
+#include "i2c.h"

 // --------------------------------------------------------------------------------------------------------------------
 // Constant and macro definitions 
 // --------------------------------------------------------------------------------------------------------------------

-
+#define BMP280_DEVICE_ID                        ((uint8_t)0x58)
+#define BMP280_RESET_VALUE                      ((uint8_t)0xB6)

 // --------------------------------------------------------------------------------------------------------------------
 // Type definitions. 
@@ -59,9 +61,93 @@
 class BMP280
 {
   public:
+      BMP280(I2C* bus, uint8_t slaveAddress);
+
+      typedef enum
+      {
+         STANDBY = 0,
+         FORCED = 1,
+         NORMAL = 3
+      } BMP280_Mode_t;
+      typedef enum
+      {
+         SKIPPED = 0,
+         X1 = 1,
+         X2 = 2,
+         X4 = 3,
+         X8 = 4,
+         X16 = 5
+      } BMP280_Oversampling_t;
+
+      void resetSensor(void);
+      bool initialize(void);
+      bool setSensorMode(BMP280_Mode_t mode);
+      bool setSensorTemperatureOversampling(BMP280_Oversampling_t oversampling);

   private:

+      struct CompensationParameters
+      {
+         // Temperature compensation parameters
+         uint16_t dig_T1;
+         int16_t dig_T2;
+         int16_t dig_T3;
+         // Pressure compensation parameters
+         uint16_t dig_P1;
+         int16_t dig_P2;
+         int16_t dig_P3;
+         int16_t dig_P4;
+         int16_t dig_P5;
+         int16_t dig_P6;
+         int16_t dig_P7;
+         int16_t dig_P8;
+         int16_t dig_P9;
+      } compensationParameters;
+
+      struct memorymap
+      {
+         struct
+         {
+            uint8_t msb;
+            uint8_t lsb;
+            uint8_t xlsb;
+         } temperature_raw;
+         struct
+         {
+            uint8_t msb;
+            uint8_t lsb;
+            uint8_t xlsb;
+         } pressure_raw;
+         struct
+         {
+            uint8_t mode : 2;
+            uint8_t oversampling_pressure : 3;
+            uint8_t oversampling_temp : 3;
+         } config;
+         uint8_t ctrl_meas;
+         uint8_t status;
+         uint8_t reset;
+         uint8_t id;
+      } memorymap;
+
+      int t_fine;
+      int temperature;
+
+      I2C* bus;
+      uint8_t slaveAddress;
+      BMP280_Mode_t mode;
+
+      void resetDriver(void);
+
+      // Communication with Device
+      void resetDevice(void);
+      void getDeviceID(void);
+      void setSensorConfiguration(void);
+
+      void getCompensationValues(void);
+
+      void compensateTemperature(void);
+
 };