driver_sht31_alert.c

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#include "driver_sht31_alert.h"
 
static sht31_handle_t gs_handle;        

uint8_t sht31_alert_irq_handler(void)
{
    if (sht31_irq_handler(&gs_handle) != 0)
    {
        return 1;
    }
    
    return 0;
}

uint8_t sht31_alert_init(sht31_address_t addr_pin, void (*callback)(uint16_t type),
                         float high_limit_temperature_set, float high_limit_humidity_set,
                         float high_limit_temperature_clear, float high_limit_humidity_clear,
                         float low_limit_temperature_set, float low_limit_humidity_set,
                         float low_limit_temperature_clear, float low_limit_humidity_clear)
{
    uint8_t res;
    uint16_t set;
    uint16_t clear;
    
    /* link functions */
    DRIVER_SHT31_LINK_INIT(&gs_handle, sht31_handle_t);
    DRIVER_SHT31_LINK_IIC_INIT(&gs_handle, sht31_interface_iic_init);
    DRIVER_SHT31_LINK_IIC_DEINIT(&gs_handle, sht31_interface_iic_deinit);
    DRIVER_SHT31_LINK_IIC_READ_ADDRESS16(&gs_handle, sht31_interface_iic_read_address16);
    DRIVER_SHT31_LINK_IIC_WRITE_ADDRESS16(&gs_handle, sht31_interface_iic_write_address16);
    DRIVER_SHT31_LINK_DELAY_MS(&gs_handle, sht31_interface_delay_ms);
    DRIVER_SHT31_LINK_DEBUG_PRINT(&gs_handle, sht31_interface_debug_print);
    DRIVER_SHT31_LINK_RECEIVE_CALLBACK(&gs_handle, callback);
 
    /* set addr pin */
    res = sht31_set_addr_pin(&gs_handle, addr_pin);
    if (res != 0)
    {
        sht31_interface_debug_print("sht31: set addr pin failed.\n");
        
        return 1;
    }
    
    /* sht31 init */
    res = sht31_init(&gs_handle);
    if (res != 0)
    {
        sht31_interface_debug_print("sht31: init failed.\n");
        
        return 1;
    }  
    
    /* wait 10 ms */
    sht31_interface_delay_ms(10);
    
    /* set default repeatability */
    res = sht31_set_repeatability(&gs_handle, SHT31_ALERT_DEFAULT_REPEATABILITY);
    if (res != 0)
    {
        sht31_interface_debug_print("sht31: set repeatability failed.\n");
        (void)sht31_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set art */
    res = sht31_set_art(&gs_handle);
    if (res != 0)
    {
        sht31_interface_debug_print("sht31: set art failed.\n");
        (void)sht31_deinit(&gs_handle);
        
        return 1;
    }
    
    /* wait 10 ms */
    sht31_interface_delay_ms(10);
    
    /* set default heater */
    res = sht31_set_heater(&gs_handle, SHT31_ALERT_DEFAULT_HEATER);
    if (res != 0)
    {
        sht31_interface_debug_print("sht31: set heater failed.\n");
        (void)sht31_deinit(&gs_handle);
        
        return 1;
    }
    
    /* wait 10 ms */
    sht31_interface_delay_ms(10);
    
    /* alert limit convert to register */
    res = sht31_alert_limit_convert_to_register(&gs_handle, high_limit_temperature_set, high_limit_humidity_set, &set);
    if (res != 0)
    {
        sht31_interface_debug_print("sht31: alert limit convert to register failed.\n");
        (void)sht31_deinit(&gs_handle);
        
        return 1;
    }
    
    /* alert limit convert to register */
    res = sht31_alert_limit_convert_to_register(&gs_handle, high_limit_temperature_clear, high_limit_humidity_clear, &clear);
    if (res != 0)
    {
        sht31_interface_debug_print("sht31: alert limit convert to register failed.\n");
        (void)sht31_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set high alert limit */
    res = sht31_set_high_alert_limit(&gs_handle, set, clear);
    if (res != 0)
    {
        sht31_interface_debug_print("sht31: set high alert limit failed.\n");
        (void)sht31_deinit(&gs_handle);
        
        return 1;
    }
    
    /* alert limit convert to register */
    res = sht31_alert_limit_convert_to_register(&gs_handle, low_limit_temperature_set, low_limit_humidity_set, &set);
    if (res != 0)
    {
        sht31_interface_debug_print("sht31: alert limit convert to register failed.\n");
        (void)sht31_deinit(&gs_handle);
        
        return 1;
    }
    
    /* alert limit convert to register */
    res = sht31_alert_limit_convert_to_register(&gs_handle, low_limit_temperature_clear, low_limit_humidity_clear, &clear);
    if (res != 0)
    {
        sht31_interface_debug_print("sht31: alert limit convert to register failed.\n");
        (void)sht31_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set low alert limit */
    res = sht31_set_low_alert_limit(&gs_handle, set, clear);
    if (res != 0)
    {
        sht31_interface_debug_print("sht31: set low alert limit failed.\n");
        (void)sht31_deinit(&gs_handle);
        
        return 1;
    }
    
    /* clear status */
    res = sht31_clear_status(&gs_handle);
    if (res != 0)
    {
        sht31_interface_debug_print("sht31: clear status failed.\n");
        (void)sht31_deinit(&gs_handle);
        
        return 1;
    }
    
    /* start continuous read */
    res = sht31_start_continuous_read(&gs_handle, SHT31_ALERT_DEFAULT_RATE);
    if (res != 0)
    {
        sht31_interface_debug_print("sht31: start continuous read failed.\n");
        (void)sht31_deinit(&gs_handle);
        
        return 1;
    }
    
    return 0;
}

uint8_t sht31_alert_read(float *temperature, float *humidity)
{
    uint16_t temperature_raw;
    uint16_t humidity_raw;
   
    /* read data */
    if (sht31_continuous_read(&gs_handle, (uint16_t *)&temperature_raw, temperature, (uint16_t *)&humidity_raw, humidity) != 0)
    {
        return 1;
    }
    
    return 0;
}

uint8_t sht31_alert_deinit(void)
{
    uint8_t res;
    
    /* stop continuous read */
    res = sht31_stop_continuous_read(&gs_handle);
    if (res != 0)
    {
        return 1;
    }
    
    /* delay 100ms */
    sht31_interface_delay_ms(100);
    
    /* close sht31 */
    if (sht31_deinit(&gs_handle) != 0)
    {
        return 1;
    }
    
    return 0;
}

uint8_t sht31_alert_get_serial_number(uint8_t sn[4])
{
    /* get serial number */
    if (sht31_get_serial_number(&gs_handle, sn) != 0)
    {
        return 1;
    }
    
    return 0;
}