max31855.h

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/***************************************************************************/
#ifndef __MAX31855_H__
#define __MAX31855_H__
 
/******************************************************************************/
/***************************** Include Files **********************************/
/******************************************************************************/
 
#include <stdint.h>
#include "no_os_spi.h"
#include "no_os_util.h"
 
/******************************************************************************/
/********************** Macros and Constants Definitions **********************/
/******************************************************************************/
 
#define MAX31855_GET_INTERNAL_TEMP(x)       (no_os_field_get(NO_OS_GENMASK(15, 4), x))
#define MAX31855_GET_FAULT_BIT(x)       (no_os_field_get(NO_OS_BIT(16), x))
#define MAX31855_GET_THERMOCOUPLE_TEMP(x)   (no_os_field_get(NO_OS_GENMASK(31, 18), x))
#define MAX31855_GET_FAULTS(x)          (no_os_field_get(NO_OS_GENMASK(2, 0), x))
 
#define MAX31855_THERMOCOUPLE_TEMP_DEC_DIV  4
#define MAX31855_INTERNAL_TEMP_DEC_DIV      16
 
#define MAX31855_THERMOCOUPLE_TEMP_SIGN_POS 13
#define MAX31855_INTERNAL_TEMP_SIGN_POS     11
 
struct max31855_init_param {
    struct no_os_spi_init_param spi_init;
};
 
struct max31855_decimal {
    int32_t integer;
    int32_t decimal;
};
 
struct _max31855_fault_sts_mask {
    uint8_t SCV:1;
    uint8_t SCG:1;
    uint8_t OC:1;
};
 
union max31855_fault_sts {
    struct _max31855_fault_sts_mask fields;
    uint8_t value;
};
 
struct max31855_dev {
    struct no_os_spi_desc *comm_desc;
    union max31855_fault_sts fault;
};
 
int max31855_init(struct max31855_dev **, struct max31855_init_param *);
 
int max31855_remove(struct max31855_dev *);
 
int max31855_read_raw(struct max31855_dev *, uint32_t *);
 
int max31855_read_temp(struct max31855_dev *, struct max31855_decimal *,
               struct max31855_decimal *);
 
#endif