max31855.h

Go to the documentation of this file.

/*
 * Copyright (C) 2024 HAW Hamburg
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#pragma once

 
/* Add header includes here */
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include "periph/spi.h"
 
/* Declare the API of the driver */

typedef struct {
    spi_t spi;          
    spi_cs_t cs_pin;    
} max31855_params_t;

typedef struct {
    const max31855_params_t *params;  
} max31855_t;

typedef enum {
    MAX31855_FAULT_VCC_SHORT    = 0,    
    MAX31855_FAULT_GND_SHORT    = 1,    
    MAX31855_FAULT_OPEN_CIRCUIT = 2,    
    MAX31855_FAULT_NO_FAULT     = 3     
} max31855_fault_t;

typedef struct {
    int32_t thermocouple_temperature;   
    int32_t internal_temperature;       
    max31855_fault_t fault;             
} max31855_data_t;

int max31855_init(max31855_t *dev, const max31855_params_t *params);

void max31855_raw_to_data(uint32_t raw_data, max31855_data_t *data);

int max31855_read(max31855_t *dev, max31855_data_t *data);

void max31855_read_raw(max31855_t *dev, uint32_t *data);
 
#ifdef __cplusplus
}
#endif