118 lines
4.4 KiB
C
118 lines
4.4 KiB
C
/*******************************************************************************
|
|
* Copyright (C) 2019 Maxim Integrated Products, Inc., All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
|
|
* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* Except as contained in this notice, the name of Maxim Integrated
|
|
* Products, Inc. shall not be used except as stated in the Maxim Integrated
|
|
* Products, Inc. Branding Policy.
|
|
*
|
|
* The mere transfer of this software does not imply any licenses
|
|
* of trade secrets, proprietary technology, copyrights, patents,
|
|
* trademarks, maskwork rights, or any other form of intellectual
|
|
* property whatsoever. Maxim Integrated Products, Inc. retains all
|
|
* ownership rights.
|
|
*******************************************************************************
|
|
* @file MAX31875.h
|
|
*******************************************************************************
|
|
*/
|
|
#ifndef MAX31875_H
|
|
#define MAX31875_H
|
|
#include <stdint.h>
|
|
|
|
#define MAX31875_NO_ERROR 0
|
|
#define MAX31875_ERROR -1
|
|
|
|
#define MAX31875_REG_TEMPERATURE 0X00
|
|
#define MAX31875_REG_CONFIGURATION 0X01
|
|
#define MAX31875_REG_THYST_LOW_TRIP 0X02
|
|
#define MAX31875_REG_TOS_HIGH_TRIP 0X03
|
|
#define MAX31875_REG_MAX 0X03
|
|
|
|
#define MAX31875_CFG_ONE_SHOT_START (1) /* Start one-shot measurement */
|
|
|
|
#define MAX31875_CFG_CONV_RATE_0_25 (0x00 << 1) /* 0.25 conversions/sec */
|
|
#define MAX31875_CFG_CONV_RATE_1 (0x01 << 1) /* 1.0 conversions/sec */
|
|
#define MAX31875_CFG_CONV_RATE_4 (0x02 << 1) /* 4.0 conversions/sec */
|
|
#define MAX31875_CFG_CONV_RATE_8 (0x03 << 1) /* 8.0 conversions/sec */
|
|
#define MAX31875_WAIT_CONV_RATE_0_25 (4.002)
|
|
#define MAX31875_WAIT_CONV_RATE_1 (1.0)
|
|
#define MAX31875_WAIT_CONV_RATE_4 (0.25)
|
|
#define MAX31875_WAIT_CONV_RATE_8 (0.125)
|
|
|
|
#define MAX31875_CFG_RESOLUTION_9BIT (0x00 << 5)
|
|
#define MAX31875_CFG_RESOLUTION_10BIT (0x01 << 5)
|
|
#define MAX31875_CFG_RESOLUTION_11BIT (0x02 << 5)
|
|
#define MAX31875_CFG_RESOLUTION_12BIT (0x03 << 5)
|
|
|
|
#define MAX31875_CFG_NORMAL_FORMAT (0X00 << 7)
|
|
#define MAX31875_CFG_EXTENDED_FORMAT (0X01 << 7)
|
|
|
|
#define MAX31875_CFG_CONTINUOUS (0X00 << 8)
|
|
#define MAX31875_CFG_SHUTDOWN (0X01 << 8)
|
|
|
|
#define MAX31875_CFG_COMPARATOR_MODE (0X00 << 9)
|
|
#define MAX31875_CFG_INTERRUPT_MODE (0X01 << 9)
|
|
|
|
|
|
#define MAX31875_CFG_FAULT_FILTER_1 (0x00 << 11)
|
|
#define MAX31875_CFG_FAULT_FILTER_2 (0x01 << 11)
|
|
#define MAX31875_CFG_FAULT_FILTER_4 (0x02 << 11)
|
|
#define MAX31875_CFG_FAULT_FILTER_6 (0x03 << 11)
|
|
|
|
#define MAX31875_CFG_OVER_TEMP_MASK (0x80)
|
|
|
|
|
|
#define MAX31875_I2C_SLAVE_ADR_R0 (0x90 >> 1) // code uses the 7 bit address
|
|
#define MAX31875_I2C_SLAVE_ADR_R1 (0x92 >> 1)
|
|
#define MAX31875_I2C_SLAVE_ADR_R2 (0x94 >> 1)
|
|
#define MAX31875_I2C_SLAVE_ADR_R3 (0x96 >> 1)
|
|
#define MAX31875_I2C_SLAVE_ADR_R4 (0x98 >> 1)
|
|
#define MAX31875_I2C_SLAVE_ADR_R5 (0x9A >> 1)
|
|
#define MAX31875_I2C_SLAVE_ADR_R6 (0x9C >> 1)
|
|
#define MAX31875_I2C_SLAVE_ADR_R7 (0x9E >> 1)
|
|
|
|
#define MAX31875_CF_NORMAL_FORMAT (0.00390625F)
|
|
#define MAX31875_CF_EXTENDED_FORMAT (0.0078125F)
|
|
|
|
/** @union max31875_raw_data
|
|
* @brief union data structure for byte word manipulations
|
|
*/
|
|
typedef union
|
|
{
|
|
struct
|
|
{
|
|
uint8_t lsb;
|
|
uint8_t msb;
|
|
} s_lm;
|
|
struct
|
|
{
|
|
uint16_t magnitude_bits: 15;
|
|
uint16_t sign_bit: 1;
|
|
} s_ms;
|
|
uint16_t uwrd;
|
|
int16_t swrd;
|
|
} max31875_raw_data;
|
|
|
|
#define MAX31875_U16_MAX ((uint16_t)~0U)
|
|
#define MAX31875_S16_MAX ((int16_t)(MAX31875_U16_MAX>>1))
|
|
#define MAX31875_S16_MIN ((int16_t)(-MAX31875_S16_MAX - 1))
|
|
|
|
#endif/* MAX31875_H */
|