driver_scd4x_shot.c

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#include "driver_scd4x_shot.h"
 
static scd4x_handle_t gs_handle;        

uint8_t scd4x_shot_init(scd4x_t type)
{
    uint8_t res;
    
    /* link functions */
    DRIVER_SCD4X_LINK_INIT(&gs_handle, scd4x_handle_t);
    DRIVER_SCD4X_LINK_IIC_INIT(&gs_handle, scd4x_interface_iic_init);
    DRIVER_SCD4X_LINK_IIC_DEINIT(&gs_handle, scd4x_interface_iic_deinit);
    DRIVER_SCD4X_LINK_IIC_WRITE_COMMAND(&gs_handle, scd4x_interface_iic_write_cmd);
    DRIVER_SCD4X_LINK_IIC_READ_COMMAND(&gs_handle, scd4x_interface_iic_read_cmd);
    DRIVER_SCD4X_LINK_DELAY_MS(&gs_handle, scd4x_interface_delay_ms);
    DRIVER_SCD4X_LINK_DEBUG_PRINT(&gs_handle, scd4x_interface_debug_print);
 
    /* set chip type */
    res = scd4x_set_type(&gs_handle, type);
    if (res != 0)
    {
        scd4x_interface_debug_print("scd4x: set type failed.\n");
    
        return 1;
    }
    
    /* scd4x init */
    res = scd4x_init(&gs_handle);
    if (res != 0)
    {
        scd4x_interface_debug_print("scd4x: init failed.\n");
        
        return 1;
    }
    
    return 0;
}

uint8_t scd4x_shot_read(uint16_t *co2_ppm, float *temperature, float *humidity)
{
    uint8_t res;
    uint32_t timeout;
    scd4x_bool_t enable;
    
    /* measure single shot */
    res = scd4x_measure_single_shot(&gs_handle);
    if (res != 0)
    {
        return 1;
    }
    
    /* set 30s */
    timeout = 30;
    
    /* check timeout */
    while (timeout != 0)
    {
        /* delay 1000ms */
        scd4x_interface_delay_ms(1000);
        
        /* timeout-- */
        timeout--;
        
        /* read data */
        res = scd4x_get_data_ready_status(&gs_handle, &enable);
        if (res != 0)
        {
            return 1;
        }
        if (enable == SCD4X_BOOL_TRUE)
        {
            uint16_t co2_raw;
            uint16_t temperature_raw;
            uint16_t humidity_raw;
            
            /* read data */
            res = scd4x_read(&gs_handle, &co2_raw, co2_ppm,
                             &temperature_raw, temperature,
                             &humidity_raw, humidity);
            if (res != 0)
            {
                return 1;
            }
            
            break;
        }
    }
    if (timeout == 0)
    {
        return 2;
    }
    
    return 0;
}

uint8_t scd4x_shot_deinit(void)
{
    /* close scd4x */
    if (scd4x_deinit(&gs_handle) != 0)
    {
        return 1;
    }
    
    return 0;
}

uint8_t scd4x_shot_get_serial_number(uint16_t num[3])
{
    /* get serial number */
    if (scd4x_get_serial_number(&gs_handle, num) != 0)
    {
        return 1;
    }
    
    return 0;
}

uint8_t scd4x_shot_wake_up(void)
{
    /* wake up */
    if (scd4x_wake_up(&gs_handle) != 0)
    {
        return 1;
    }
    
    return 0;
}

uint8_t scd4x_shot_power_down(void)
{
    /* power down */
    if (scd4x_power_down(&gs_handle) != 0)
    {
        return 1;
    }
    
    return 0;
}