driver_max31856_basic.c

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#include "driver_max31856_basic.h"
 
static max31856_handle_t gs_handle;        

uint8_t max31856_basic_init(max31856_thermocouple_type_t type)
{
    uint8_t res;
    int8_t offset;
    
    /* link interface function */
    DRIVER_MAX31856_LINK_INIT(&gs_handle, max31856_handle_t); 
    DRIVER_MAX31856_LINK_SPI_INIT(&gs_handle, max31856_interface_spi_init);
    DRIVER_MAX31856_LINK_SPI_DEINIT(&gs_handle, max31856_interface_spi_deinit);
    DRIVER_MAX31856_LINK_SPI_READ(&gs_handle, max31856_interface_spi_read);
    DRIVER_MAX31856_LINK_SPI_WRITE(&gs_handle, max31856_interface_spi_write);
    DRIVER_MAX31856_LINK_DELAY_MS(&gs_handle, max31856_interface_delay_ms);
    DRIVER_MAX31856_LINK_DEBUG_PRINT(&gs_handle, max31856_interface_debug_print);
    DRIVER_MAX31856_LINK_RECEIVE_CALLBACK(&gs_handle, max31856_interface_receive_callback);
    
    /* max31856 init */
    res = max31856_init(&gs_handle);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: init failed.\n");
       
        return 1;
    }
    
    /* set thermocouple type */
    res = max31856_set_thermocouple_type(&gs_handle, type);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: set thermocouple type failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set default open circuit detection */
    res = max31856_set_open_circuit_detection(&gs_handle, MAX31856_BASIC_DEFAULT_OPEN_CIRCUIT_DETECTION);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: set open circuit detection failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* enable cold junction sensor */
    res = max31856_set_cold_junction_sensor(&gs_handle, MAX31856_BOOL_TRUE);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: set cold junction sensor failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set default fault mode */
    res = max31856_set_fault_mode(&gs_handle, MAX31856_BASIC_DEFAULT_FAULT_MODE);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: set fault mode failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set default noise rejection filter */
    res = max31856_set_noise_rejection_filter(&gs_handle, MAX31856_BASIC_DEFAULT_NOISE_REJECTION_FILTER);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: set noise rejection filter failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set default sample average */
    res = max31856_set_sample_average(&gs_handle, MAX31856_BASIC_DEFAULT_SAMPLE_AVERAGE);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: set sample average failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* enable cold junction high fault threshold mask */
    res = max31856_set_fault_mask(&gs_handle, MAX31856_FAULT_MASK_CJHIGH, MAX31856_BOOL_TRUE);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: set fault mask failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* enable cold junction low fault threshold mask */
    res = max31856_set_fault_mask(&gs_handle, MAX31856_FAULT_MASK_CJLOW, MAX31856_BOOL_TRUE);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: set fault mask failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* enable thermocouple temperature high fault threshold mask */
    res = max31856_set_fault_mask(&gs_handle, MAX31856_FAULT_MASK_TCHIGH, MAX31856_BOOL_TRUE);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: set fault mask failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* enable thermocouple temperature low fault threshold mask */
    res = max31856_set_fault_mask(&gs_handle, MAX31856_FAULT_MASK_TCLOW, MAX31856_BOOL_TRUE);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: set fault mask failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* enable over voltage or undervoltage input fault mask */
    res = max31856_set_fault_mask(&gs_handle, MAX31856_FAULT_MASK_OVUV, MAX31856_BOOL_TRUE);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: set fault mask failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* enable thermocouple open circuit fault mask */
    res = max31856_set_fault_mask(&gs_handle, MAX31856_FAULT_MASK_OPEN, MAX31856_BOOL_TRUE);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: set fault mask failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set default cold junction temperature offset */
    res = max31856_cold_junction_temperature_offset_convert_to_register(&gs_handle, MAX31856_BASIC_DEFAULT_COLD_JUNCTION_TEMPERATURE_OFFSET, &offset);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: cold junction temperature offset convert to register failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* set cold junction temperature offset */
    res = max31856_set_cold_junction_temperature_offset(&gs_handle, offset);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: set cold junction temperature offset failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* clear fault */
    res = max31856_clear_fault(&gs_handle);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: clear fault failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    /* start continuous read */
    res = max31856_start_continuous_read(&gs_handle);
    if (res != 0)
    {
        max31856_interface_debug_print("max31856: start continuous read failed.\n");
        (void)max31856_deinit(&gs_handle);
        
        return 1;
    }
    
    return 0;
}

uint8_t max31856_basic_deinit(void)
{
    /* stop continuous read */
    if (max31856_stop_continuous_read(&gs_handle) != 0)
    {
        return 1;
    }
    
    /* close max31856 */
    if (max31856_deinit(&gs_handle) != 0)
    {
        return 1;
    }
    
    return 0;
}

uint8_t max31856_basic_read(double *temp_deg, uint8_t *fault)
{
    uint8_t res;
    int32_t raw;
    
    /* continuous read */
    res = max31856_continuous_read(&gs_handle, &raw, temp_deg);
    if (res != 0)
    {
        return 1;
    }
    
    /* get fault status */
    res = max31856_get_fault_status(&gs_handle, fault);
    if (res != 0)
    {
        return 1;
    }
    
    return 0;
}

uint8_t max31856_basic_read_cold_junction_temperature(double *temp_deg)
{
    int16_t raw;
    
    /* read cold junction temperature */
    if (max31856_read_cold_junction_temperature(&gs_handle, &raw, temp_deg) != 0)
    {
        return 1;
    }
    
    return 0;
}