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2 mjames 1 
#include "main.h"
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#include "libBMP280/bmp280.h"
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/* USER CODE BEGIN PV */
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typedef struct
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{
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  uint8_t dev_addr;
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} interface_t;
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// interface code
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/// pointer to I2C hardware
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static I2C_HandleTypeDef *hi2c;
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/// @brief  Generic I2C write function
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/// @param i2c_addr I2C address
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/// @param reg_addr I2C register address
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/// @param reg_data pointer to data buffer to send
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/// @param len  length of data to send
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/// @return
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static int8_t
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user_i2c_write(uint8_t i2c_addr, uint8_t reg_addr, uint8_t *reg_data,
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               uint16_t len)
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{
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  HAL_StatusTypeDef st = HAL_I2C_Mem_Write(hi2c, i2c_addr << 1, reg_addr, 1,
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                                           reg_data, len, 1000);
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  return st != HAL_OK ? BMP280_E_COMM_FAIL : BMP280_OK;
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}
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/// @brief  Generic I2C read function
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/// @param i2c_addr I2C address
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/// @param reg_addr I2C register address
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/// @param reg_data pointer to data buffer to fill
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/// @param len  length of data to receive
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/// @return status code
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static int8_t
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user_i2c_read(uint8_t i2c_addr,
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              uint8_t reg_addr,
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              uint8_t *reg_data,
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              uint16_t len)
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{
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  HAL_StatusTypeDef st = HAL_I2C_Mem_Read(hi2c, i2c_addr << 1, reg_addr, 1,
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                                          reg_data, len, 1000);
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  return st != HAL_OK ? BMP280_E_COMM_FAIL : BMP280_OK;
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}
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static void
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user_delay_ms(uint32_t ms)
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{
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  HAL_Delay(ms);
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}
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struct bmp280_dev bmp =
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    {
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        .intf = BMP280_I2C_INTF,
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        .read = user_i2c_read,
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        .write = user_i2c_write,
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        .delay_ms = user_delay_ms,
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        /* Update interface pointer with the structure that contains both device address and file descriptor */
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        .dev_id = BMP280_I2C_ADDR_PRIM};
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struct bmp280_dev bmpAtm =
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   {
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        .intf = BMP280_I2C_INTF,
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        .read = user_i2c_read,
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        .write = user_i2c_write,
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        .delay_ms = user_delay_ms,
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        /* Update interface pointer with the structure that contains both device address and file descriptor */
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        .dev_id = BMP280_I2C_ADDR_SEC};
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struct bmp280_config conf;
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uint8_t init_bmp(I2C_HandleTypeDef *i2c,struct bmp280_dev * bmp)
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{
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  // copy the I2c handle over
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  hi2c = i2c;
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  int8_t rslt = bmp280_init(bmp);
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  if (rslt != BMP280_OK)
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    return rslt;
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  rslt = bmp280_get_config(&conf, bmp);
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  if (rslt != BMP280_OK)
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    return rslt;
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  /* configuring the temperature oversampling, filter coefficient and output data rate */
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  /* Overwrite the desired settings */
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  conf.filter = BMP280_FILTER_COEFF_4;
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  /* Temperature oversampling set at 1x */
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  conf.os_temp = BMP280_OS_1X;
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  /* Pressure over sampling 4x */
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  conf.os_pres = BMP280_OS_4X;
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  /* Setting the output data rate as 8HZ(500ms) */
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  conf.odr = BMP280_ODR_125_MS;
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  rslt = bmp280_set_config(&conf, bmp);
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  if (rslt != BMP280_OK)
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    return rslt;
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  /* Always set the power mode after setting the configuration */
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  rslt = bmp280_set_power_mode(BMP280_NORMAL_MODE, bmp);
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  return rslt;
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}