90 lines
2.2 KiB
C
90 lines
2.2 KiB
C
/*
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* bmp180.h
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*
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* Created on: 23.08.2015
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* Author: fbargste
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*/
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#ifndef DRIVER_BMP180_H_
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#define DRIVER_BMP180_H_
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#include "stdint.h"
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#include "stdbool.h"
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#include "FreeRTOS.h"
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#include "queue.h"
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// Uncomment to enable debug output
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//#define BMP180_DEBUG
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#define BMP180_TEMPERATURE (1<<0)
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#define BMP180_PRESSURE (1<<1)
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#ifdef __cplusplus
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extern "C" {
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#endif
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//
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// Create bmp180_types
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//
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// temperature in °C
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typedef float bmp180_temp_t;
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// pressure in mPa (To get hPa divide by 100)
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typedef uint32_t bmp180_press_t;
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// BMP180_Event_Result
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typedef struct
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{
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uint8_t cmd;
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bmp180_temp_t temperature;
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bmp180_press_t pressure;
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} bmp180_result_t;
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// Init bmp180 driver ...
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bool bmp180_init(uint8_t scl, uint8_t sda);
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// Trigger a "complete" measurement (temperature and pressure will be valid when given to "bmp180_informUser)
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void bmp180_trigger_measurement(const xQueueHandle* resultQueue);
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// Trigger a "temperature only" measurement (only temperature will be valid when given to "bmp180_informUser)
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void bmp180_trigger_temperature_measurement(const xQueueHandle* resultQueue);
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// Trigger a "pressure only" measurement (only pressure will be valid when given to "bmp180_informUser)
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void bmp180_trigger_pressure_measurement(const xQueueHandle* resultQueue);
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// Give the user the chance to create it's own handler
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extern bool (*bmp180_informUser)(const xQueueHandle* resultQueue, uint8_t cmd, bmp180_temp_t temperature, bmp180_press_t pressure);
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// Calibration constants
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typedef struct
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{
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int16_t AC1;
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int16_t AC2;
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int16_t AC3;
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uint16_t AC4;
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uint16_t AC5;
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uint16_t AC6;
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int16_t B1;
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int16_t B2;
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int16_t MB;
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int16_t MC;
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int16_t MD;
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} bmp180_constants_t;
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// Returns true if the bmp180 is detected.
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bool bmp180_is_available();
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// Reads all the internal constants, returning true on success.
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bool bmp180_fillInternalConstants(bmp180_constants_t *c);
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// Reads an optional temperature and pressure. The over sampling
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// setting, oss, may be 0 to 3. Returns true on success.
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bool bmp180_measure(bmp180_constants_t *c, int32_t *temperature,
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uint32_t *pressure, uint8_t oss);
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#ifdef __cplusplus
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}
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#endif
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#endif /* DRIVER_BMP180_H_ */
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