/**
 * @file    bsp_bmp280.c
 * @brief   BMP280 sensor driver implementation (BSP layer)
 */

#include "bsp_bmp280.h"
#include "driver_bmp280_interface.h"

/* Private variables ----------------------------------------------------------*/
static bmp280_handle_t gs_bmp280_handle;
static uint8_t gs_bmp280_inited = 0;

/**
 * @brief  Initialize BMP280 sensor
 * @retval 0: success
 *         other: error code
 */
uint8_t BSP_BMP280_Init(void)
{
    uint8_t res;
    
    /* Initialize handle */
    DRIVER_BMP280_LINK_INIT(&gs_bmp280_handle, bmp280_handle_t);
    
    /* Link interface functions */
    DRIVER_BMP280_LINK_IIC_INIT(&gs_bmp280_handle, bmp280_interface_iic_init);
    DRIVER_BMP280_LINK_IIC_DEINIT(&gs_bmp280_handle, bmp280_interface_iic_deinit);
    DRIVER_BMP280_LINK_IIC_READ(&gs_bmp280_handle, bmp280_interface_iic_read);
    DRIVER_BMP280_LINK_IIC_WRITE(&gs_bmp280_handle, bmp280_interface_iic_write);
    DRIVER_BMP280_LINK_SPI_INIT(&gs_bmp280_handle, bmp280_interface_spi_init);
    DRIVER_BMP280_LINK_SPI_DEINIT(&gs_bmp280_handle, bmp280_interface_spi_deinit);
    DRIVER_BMP280_LINK_SPI_READ(&gs_bmp280_handle, bmp280_interface_spi_read);
    DRIVER_BMP280_LINK_SPI_WRITE(&gs_bmp280_handle, bmp280_interface_spi_write);
    DRIVER_BMP280_LINK_DELAY_MS(&gs_bmp280_handle, bmp280_interface_delay_ms);
    DRIVER_BMP280_LINK_DEBUG_PRINT(&gs_bmp280_handle, bmp280_interface_debug_print);
    
    /* Set I2C interface */
    bmp280_set_interface(&gs_bmp280_handle, BMP280_INTERFACE_IIC);
    
    /* Set I2C address (SDO pin grounded: 0x76) */
    bmp280_set_addr_pin(&gs_bmp280_handle, BMP280_ADDRESS_ADO_LOW);
    
    /* Initialize BMP280 */
    res = bmp280_init(&gs_bmp280_handle);
    if (res != 0)
    {
        gs_bmp280_inited = 0;
        return res;
    }
    
    /* Configure sensor */
    bmp280_set_temperatue_oversampling(&gs_bmp280_handle, BMP280_OVERSAMPLING_x2);
    bmp280_set_pressure_oversampling(&gs_bmp280_handle, BMP280_OVERSAMPLING_x2);
    bmp280_set_filter(&gs_bmp280_handle, BMP280_FILTER_COEFF_16);
    bmp280_set_standby_time(&gs_bmp280_handle, BMP280_STANDBY_TIME_500_MS);
    bmp280_set_mode(&gs_bmp280_handle, BMP280_MODE_NORMAL);
    
    gs_bmp280_inited = 1;
    
    return 0;
}

/**
 * @brief  Read temperature and pressure data
 * @param  data: pointer to store sensor data
 * @retval 0: success
 *         other: error code
 */
uint8_t BSP_BMP280_Read(bsp_bmp280_data_t *data)
{
    uint8_t res;
    uint32_t temp_raw;
    uint32_t press_raw;
    
    if (gs_bmp280_inited == 0)
    {
        return 1;
    }
    
    if (data == NULL)
    {
        return 2;
    }
    
    res = bmp280_read_temperature_pressure(&gs_bmp280_handle, 
                                           &temp_raw, &data->temperature,
                                           &press_raw, &data->pressure);
    if (res != 0)
    {
        data->is_ready = 0;
        return res;
    }
    
    data->is_ready = 1;
    return 0;
}