Srm bme280 class

Core/Inc/stm32f4xx_it.h

@@ -55,6 +55,7 @@ void SVC_Handler(void);
 void DebugMon_Handler(void);
 void PendSV_Handler(void);
 void SysTick_Handler(void);
+void SPI2_IRQHandler(void);
 void USART1_IRQHandler(void);
 void USART2_IRQHandler(void);
 void DMA2_Stream0_IRQHandler(void);

Core/Src/spi.c

@@ -85,6 +85,9 @@ void HAL_SPI_MspInit(SPI_HandleTypeDef* spiHandle)
     GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
     HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
 
+    /* SPI2 interrupt Init */
+    HAL_NVIC_SetPriority(SPI2_IRQn, 0, 0);
+    HAL_NVIC_EnableIRQ(SPI2_IRQn);
   /* USER CODE BEGIN SPI2_MspInit 1 */
 
   /* USER CODE END SPI2_MspInit 1 */
@@ -110,6 +113,8 @@ void HAL_SPI_MspDeInit(SPI_HandleTypeDef* spiHandle)
     */
     HAL_GPIO_DeInit(GPIOB, GPIO_PIN_10|GPIO_PIN_12|GPIO_PIN_14|GPIO_PIN_15);
 
+    /* SPI2 interrupt Deinit */
+    HAL_NVIC_DisableIRQ(SPI2_IRQn);
   /* USER CODE BEGIN SPI2_MspDeInit 1 */
 
   /* USER CODE END SPI2_MspDeInit 1 */

Core/Src/stm32f4xx_it.c

@@ -56,6 +56,7 @@
 
 /* External variables --------------------------------------------------------*/
 extern DMA_HandleTypeDef hdma_adc1;
+extern SPI_HandleTypeDef hspi2;
 extern UART_HandleTypeDef huart1;
 extern UART_HandleTypeDef huart2;
 /* USER CODE BEGIN EV */
@@ -200,6 +201,20 @@ void SysTick_Handler(void)
 /* please refer to the startup file (startup_stm32f4xx.s).                    */
 /******************************************************************************/
 
+/**
+  * @brief This function handles SPI2 global interrupt.
+  */
+void SPI2_IRQHandler(void)
+{
+  /* USER CODE BEGIN SPI2_IRQn 0 */
+
+  /* USER CODE END SPI2_IRQn 0 */
+  HAL_SPI_IRQHandler(&hspi2);
+  /* USER CODE BEGIN SPI2_IRQn 1 */
+
+  /* USER CODE END SPI2_IRQn 1 */
+}
+
 /**
   * @brief This function handles USART1 global interrupt.
   */

Lib/Inc/CBME280.h

@@ -0,0 +1,148 @@
+/**
+ *@file CBME280.h
+ *
+ */
+
+/*
+ * CBME280.h
+ *
+ *  Created on: 24 Jul 2022
+ *      Author: salavat.magazov
+ */
+
+#ifndef CBME280_H_
+#define CBME280_H_
+
+#include "CGpioWrapper.h"
+#include "gpio.h"
+#include "spi.h"
+
+#define T_CALIBRATION_SIZE 3
+#define P_CALIBRATION_SIZE 9
+#define H_CALIBRATION_SIZE 6
+#define RAW_ADC_DATA_SIZE  8
+#define MAX_SENSORS        2
+
+class CBME280
+{
+    enum REGISTER_MAP
+    {
+        /* Calibration registers. */
+        DIG_T1 = 0x88,
+        DIG_T2 = 0x8A,
+        DIG_T3 = 0x8C,
+        DIG_P1 = 0x8E,
+        DIG_P2 = 0x90,
+        DIG_P3 = 0x92,
+        DIG_P4 = 0x94,
+        DIG_P5 = 0x96,
+        DIG_P6 = 0x98,
+        DIG_P7 = 0x9A,
+        DIG_P8 = 0x9C,
+        DIG_P9 = 0x9E,
+        DIG_H1 = 0xA1,
+        DIG_H2 = 0xE1,
+        DIG_H3 = 0xE3,
+        DIG_H4 = 0xE4,
+        DIG_H5 = 0xE5,
+        /* Sensor data registers. */
+        ID = 0xD0,
+        RESET = 0xE0,
+        CTRL_HUM = 0xF2,
+        STATUS = 0xF3,
+        CTRL_MEAS = 0xF4,
+        CONFIG = 0xF5,
+        PRESS_MSB = 0xF7,
+        PRESS_LSB = 0xF8,
+        PRESS_XLSB = 0xF9,
+        TEMP_MSB = 0xFA,
+        TEMP_LSB = 0xFB,
+        TEMP_XLSB = 0xFC,
+        HUM_MSB = 0xFD,
+        HUM_LSB = 0xFE
+    };
+
+public:
+    CBME280(SPI_HandleTypeDef *p_spi,
+            GPIO_TypeDef *p_slave_select_port,
+            uint16_t slave_select_pin);
+    virtual ~CBME280();
+
+    bool init();
+    bool run();
+
+    /**
+     * @brief Access processed temperature data.
+     *
+     * @return Temperature in degrees Celsius.
+     */
+    float getTemperature() const
+    {
+        return m_temperature;
+    };
+
+    /**
+     * @brief Access processed pressure data.
+     *
+     * @return Pressure in Pascals.
+     */
+    float getPressure() const
+    {
+        return m_pressure;
+    };
+
+    /**
+     * @brief Access processed humidity data.
+     *
+     * @return Humidity in %RH.
+     */
+    float getHumidity() const
+    {
+        return m_humidity;
+    };
+
+    bool isMeasuring() const
+    {
+        return m_state == MEASURING;
+    }
+
+    static void processIrq();
+
+private:
+    void calibrateSensor(uint8_t const *const p_calibration_data);
+    void convertRawData();
+    bool startMeasurement();
+    void calculateT();
+    void calculateP();
+    void calculateH();
+
+    SPI_HandleTypeDef *mp_spi;
+    CGpioWrapper m_slave_select;
+
+    enum STATES
+    {
+        INIT_PENDING = 0,
+        READY,
+        MEASURING,
+        NEW_DATA
+    } m_state;
+
+    static CBME280 *sp_sensors[MAX_SENSORS];
+    static uint8_t s_sensor_count;
+
+    float m_temperature_calibration[T_CALIBRATION_SIZE];
+    float m_pressure_calibration[P_CALIBRATION_SIZE];
+    float m_humidity_calibration[H_CALIBRATION_SIZE];
+
+    uint8_t m_raw_adc_data[RAW_ADC_DATA_SIZE];
+    uint32_t m_raw_temperature_data;
+    uint32_t m_raw_pressure_data;
+    uint32_t m_raw_humidity_data;
+
+    float m_t_fine;
+    float m_temperature;
+    float m_pressure;
+    float m_humidity;
+};
+
+#endif /* CBME280_H_ */