max31865_internal.h

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/*
 * Copyright (C) 2025 David Picard
 *
 * 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

 
#ifdef __cplusplus
extern "C" {
#endif
#define MAX31865_DATA_SIZE                  (8)

#define MAX31865_REF_RESISTANCE_DEFAULT     (220)

#define MAX31865_HTHRES_DEFAULT             (0xFFFF)

#define MAX31865_LTHRES_DEFAULT             (0x0000)

 
#define MAX31865_ADDR_CFG_R                 (0x00)  
#define MAX31865_ADDR_CFG_W                 (0x80)  
#define MAX31865_ADDR_RTD_MSB               (0x01)  
#define MAX31865_ADDR_RTD_LSB               (0x02)  
#define MAX31865_ADDR_RTD_HTHRES_MSB_R      (0x03)  
#define MAX31865_ADDR_RTD_HTHRES_MSB_W      (0x83)  
#define MAX31865_ADDR_RTD_HTHRES_LSB_R      (0x04)  
#define MAX31865_ADDR_RTD_HTHRES_LSB_W      (0x84)  
#define MAX31865_ADDR_RTD_LTHRES_MSB_R      (0x05)  
#define MAX31865_ADDR_RTD_LTHRES_MSB_W      (0x85)  
#define MAX31865_ADDR_RTD_LTHRES_LSB_R      (0x06)  
#define MAX31865_ADDR_RTD_LTHRES_LSB_W      (0x86)  
#define MAX31865_ADDR_FAULT                 (0x07)  


#define MAX31865_CFG_VBIAS_ON               (0b10000000)

#define MAX31865_CFG_CONV_AUTO              (0b01000000)

#define MAX31865_CFG_1SHOT                  (0b00100000)

#define MAX31865_CFG_3WIRE                  (0b00010000)

#define MAX31865_CFG_CLEAR_FAULT            (0b00000010)

#define MAX31865_CFG_FILTER_50HZ            (0b00000001)

#define MAX31865_CFG_FLTDET_MASK           (0b00001100)

#define MAX31865_CFG_FLTDET_IDLE           (0b00000000)

#define MAX31865_CFG_FLTDET_AUTO_START     (0b00000100)

#define MAX31865_CFG_FLTDET_MANU_START     (0b00001000)

#define MAX31865_CFG_FLTDET_MANU_STOP      (0b00001100)
   /* end of group drivers_max31865_constants_regcfg */


#define MAX31865_FLT_THRESHIGH              (0b10000000)

#define MAX31865_FLT_THRESLOW               (0b01000000)

#define MAX31865_FLT_REF_FC                 (0b00100000)

#define MAX31865_FLT_REF_FO                 (0b00010000)

#define MAX31865_FLT_RTD_FO                 (0b00001000)

#define MAX31865_FLT_VOLTAGE                (0b00000100)
   /* end of group drivers_max31865_constants_regflt */
 
#ifdef __cplusplus
}
#endif