Implementation of MAX31865 Driver. More...

#include <errno.h>
#include <stdlib.h>
#include <stdint.h>
#include <stdbool.h>
#include "max31865.h"
#include "no_os_spi.h"
#include "no_os_util.h"
#include "no_os_alloc.h"
#include "no_os_delay.h"

Include dependency graph for max31865.c:

Functions
int	max31865_init (struct max31865_dev *device, struct max31865_init_param init_param)
	Device and comm init function. More...

int	max31865_remove (struct max31865_dev *device)
	Remove resources allocated by the init function. More...

int	max31865_reg_update (struct max31865_dev *device, uint8_t reg_addr, uint8_t reg_update, bool or_mask)
	update register contents More...

int	max31865_read (struct max31865_dev device, uint8_t reg_addr, uint8_t reg_data)
	Read raw register value. More...

int	max31865_write (struct max31865_dev *device, uint8_t reg_addr, uint8_t reg_data)
	Write raw register value. More...

int	max31865_clear_fault (struct max31865_dev *device)
	Clear all faults in FAULTSTAT. More...

int	max31865_enable_bias (struct max31865_dev *device, bool bias_en)
	Enable the bias voltage on the RTD sensor. More...

int	max31865_auto_convert (struct max31865_dev *device, bool auto_conv_en)
	Option for continuous conversions between 50/60 Hz. More...

int	max31865_enable_50Hz (struct max31865_dev *device, bool filt_en)
	Option for 50Hz or 60Hz noise filters. More...

int	max31865_set_threshold (struct max31865_dev *device, uint16_t lower, uint16_t upper)
	Update the contents of the HIGH and LOW FAULT registers of max31865. More...

int	max31865_get_lower_threshold (struct max31865_dev device, uint16_t low_threshold)
	Read the raw 16-bit lower threshold value. More...

int	max31865_get_upper_threshold (struct max31865_dev device, uint16_t up_threshold)
	Read the raw 16-bit upper threshold value. More...

int	max31865_set_wires (struct max31865_dev *device, bool is_odd_wire)
	N-wire option for RTD measurement setup. More...

int	max31865_read_rtd (struct max31865_dev device, uint16_t rtd_reg)
	Read the raw 16-bit value from the RTD_REG in one shot mode. More...

Detailed Description

Implementation of MAX31865 Driver.

Author: JSanBuen (jose..nosp@m.sanb.nosp@m.uenav.nosp@m.entu.nosp@m.ra@an.nosp@m.alog.nosp@m..com); MSosa (marcp.nosp@m.aolo.nosp@m..sosa.nosp@m.@ana.nosp@m.log.c.nosp@m.om)

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
Neither the name of Analog Devices, Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES, INC. “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Function Documentation

◆ max31865_auto_convert()

int max31865_auto_convert	(	struct max31865_dev *	device,
		bool	auto_conv_en
	)

Option for continuous conversions between 50/60 Hz.

Parameters

device	MAX31865 descriptor
auto_conv_en	If true, auto conversion is enabled

Returns: 0 in case of success, negative error code otherwise

◆ max31865_clear_fault()

int max31865_clear_fault ( struct max31865_dev * device )

Clear all faults in FAULTSTAT.

Parameters

device MAX31865 descriptor

Returns: 0 in case of success, negative error code otherwise

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◆ max31865_enable_50Hz()

int max31865_enable_50Hz	(	struct max31865_dev *	device,
		bool	filt_en
	)

Option for 50Hz or 60Hz noise filters.

Parameters

device	MAX31865 descriptor
filt_en	If true, 50Hz noise is filtered, else 60Hz(default)

Returns: 0 in case of success, negative error code otherwise

◆ max31865_enable_bias()

int max31865_enable_bias	(	struct max31865_dev *	device,
		bool	bias_en
	)

Enable the bias voltage on the RTD sensor.

Parameters

device	MAX31865 descriptor
bias_en	If true bias is enabled, else disabled

Returns: 0 in case of success, negative error code otherwise

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◆ max31865_get_lower_threshold()

int max31865_get_lower_threshold	(	struct max31865_dev *	device,
		uint16_t *	low_threshold
	)

Read the raw 16-bit lower threshold value.

Parameters

device	MAX31865 descriptor
low_threshold	pointer to hold the 16-bit lower threshold value

Returns: 0 in case of success, negative error code otherwise

◆ max31865_get_upper_threshold()

int max31865_get_upper_threshold	(	struct max31865_dev *	device,
		uint16_t *	up_threshold
	)

Read the raw 16-bit upper threshold value.

Parameters

device	MAX31865 descriptor
up_threshold	pointer to hold the 16-bit upper threshold value

Returns: 0 in case of success, negative error code otherwise

◆ max31865_init()

int max31865_init	(	struct max31865_dev **	device,
		struct max31865_init_param *	init_param
	)

Device and comm init function.

Parameters

device	- MAX31865 descriptor to be initialized
init_param	- Init parameters for descriptor

Returns: 0 in case of success, errno errors otherwise

◆ max31865_read()

int max31865_read	(	struct max31865_dev *	device,
		uint8_t	reg_addr,
		uint8_t *	reg_data
	)

Read raw register value.

Parameters

device	- MAX31865 descriptor
reg_addr	- register value to read from
reg_data	- pointer for register value read

Returns: 0 in case of success, negative error code otherwise

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◆ max31865_read_rtd()

int max31865_read_rtd	(	struct max31865_dev *	device,
		uint16_t *	rtd_reg
	)

Read the raw 16-bit value from the RTD_REG in one shot mode.

Parameters

device	MAX31865 descriptor
rtd_reg	pointer to hold the 16-bit raw RTD_REG value

Returns: 0 in case of success, negative error code otherwise

◆ max31865_reg_update()

int max31865_reg_update	(	struct max31865_dev *	device,
		uint8_t	reg_addr,
		uint8_t	reg_update,
		bool	or_mask
	)

update register contents

Parameters

device	- MAX31865 descriptor
reg_addr	- register value to read from
reg_update	- mask to update the value of selected register
or_mask	- set to true for OR, false for AND masking

Returns: 0 in case of success, negative error code otherwise

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◆ max31865_remove()

int max31865_remove ( struct max31865_dev * device )

Remove resources allocated by the init function.

Parameters

device - max31865 descriptor

Returns: 0 in case of success, errno errors otherwise

◆ max31865_set_threshold()

int max31865_set_threshold	(	struct max31865_dev *	device,
		uint16_t	lower,
		uint16_t	upper
	)

Update the contents of the HIGH and LOW FAULT registers of max31865.

Parameters

device	MAX31865 descriptor
lower	raw lower threshold
upper	raw upper threshold

Returns: 0 in case of success, negative error code otherwise

◆ max31865_set_wires()

int max31865_set_wires	(	struct max31865_dev *	device,
		bool	is_odd_wire
	)

N-wire option for RTD measurement setup.

Parameters

device	MAX31865 descriptor
is_odd_wire	If true, uses 3-wire setup. Else, uses 2/4-wire setup.

Returns: 0 in case of success, negative error code otherwise

◆ max31865_write()

int max31865_write	(	struct max31865_dev *	device,
		uint8_t	reg_addr,
		uint8_t	reg_data
	)

Write raw register value.

Parameters

device	- MAX31865 descriptor
reg_addr	- register value to write to
reg_data	- data to write in register

Returns: 0 in case of success, negative error code otherwise

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Functions

Detailed Description

Function Documentation

◆ max31865_auto_convert()

◆ max31865_clear_fault()

◆ max31865_enable_50Hz()

◆ max31865_enable_bias()

◆ max31865_get_lower_threshold()

◆ max31865_get_upper_threshold()

◆ max31865_init()

◆ max31865_read()

◆ max31865_read_rtd()

◆ max31865_reg_update()

◆ max31865_remove()

◆ max31865_set_threshold()

◆ max31865_set_wires()

◆ max31865_write()