powrms_max77986.h File Reference

MAX77985/MAX77986 charger setup for EVAL-POWRMS project. More...

#include "no_os_i2c.h"

Include dependency graph for powrms_max77986.h:

Macros
#define	MAX77986_I2C_ADDR   0x6B
#define	MAX77986_REG_CHG_CNFG_00   0x16
#define	MAX77986_REG_CHG_CNFG_04   0x1A
#define	MAX77986_REG_CHG_CNFG_06   0x1C
#define	MAX77986_REG_CHG_CNFG_07   0x1D
#define	MAX77986_REG_CHG_CNFG_08   0x1E
#define	MAX77986_REG_CHG_CNFG_09   0x1F
#define	MAX77986_CHG_CNFG_06_UNLOCK   0x0C
#define	MAX77986_CHG_CNFG_04_VAL   0xE4
#define	MAX77986_CHG_CNFG_08_VAL   0x50
#define	MAX77986_CHG_CNFG_09_VAL   0x6D
#define	MAX77986_CHG_CNFG_07_VAL   0x20
#define	MAX77986_CHG_CNFG_00_VAL   0x14

Functions
int	max77986_init (struct no_os_i2c_desc **desc, const struct no_os_i2c_init_param *param)
	Initialize the MAX77986 over I2C in MODE 6 with maximum current.
int	max77986_remove (struct no_os_i2c_desc *desc)
	Free the resources allocated by max77986_init().

Detailed Description

MAX77985/MAX77986 charger setup for EVAL-POWRMS project.

Author

Robert Budai (rober.nosp@m.t.bu.nosp@m.dai@a.nosp@m.nalo.nosp@m.g.com)

Copyright 2025(c) Analog Devices, Inc.

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

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. 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.
3. 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.

Macro Definition Documentation

MAX77986_CHG_CNFG_00_VAL

#define MAX77986_CHG_CNFG_00_VAL   0x14

MAX77986_CHG_CNFG_04_VAL

#define MAX77986_CHG_CNFG_04_VAL   0xE4

MAX77986_CHG_CNFG_06_UNLOCK

#define MAX77986_CHG_CNFG_06_UNLOCK   0x0C

MAX77986_CHG_CNFG_07_VAL

#define MAX77986_CHG_CNFG_07_VAL   0x20

MAX77986_CHG_CNFG_08_VAL

#define MAX77986_CHG_CNFG_08_VAL   0x50

MAX77986_CHG_CNFG_09_VAL

#define MAX77986_CHG_CNFG_09_VAL   0x6D

MAX77986_I2C_ADDR

#define MAX77986_I2C_ADDR   0x6B

MAX77986_REG_CHG_CNFG_00

#define MAX77986_REG_CHG_CNFG_00   0x16

MAX77986_REG_CHG_CNFG_04

#define MAX77986_REG_CHG_CNFG_04   0x1A

MAX77986_REG_CHG_CNFG_06

#define MAX77986_REG_CHG_CNFG_06   0x1C

MAX77986_REG_CHG_CNFG_07

#define MAX77986_REG_CHG_CNFG_07   0x1D

MAX77986_REG_CHG_CNFG_08

#define MAX77986_REG_CHG_CNFG_08   0x1E

MAX77986_REG_CHG_CNFG_09

#define MAX77986_REG_CHG_CNFG_09   0x1F

Function Documentation

max77986_init()

int max77986_init	(	struct no_os_i2c_desc **	desc,
		const struct no_os_i2c_init_param *	param )

Initialize the MAX77986 over I2C in MODE 6 with maximum current.

Brings up the adapter->SYS synchronous buck (no battery) regulated to a fixed 5.0 V with the adapter input current limit set to its maximum (5.5 A). The charger config registers are unlocked first, the voltage and current limits configured, the BATT-to-SYS FET forced off, and MODE = 0x6 enabled last.

Parameters

desc	- Will be set to the allocated I2C descriptor on success. The caller owns it and must release it with max77986_remove().
param	- I2C bus initialization parameters (slave address 0x6B).

Returns

0 on success, negative error code on failure.

max77986_remove()

int max77986_remove

(

struct no_os_i2c_desc *

desc

)

Free the resources allocated by max77986_init().

Parameters

desc	- I2C descriptor returned by max77986_init().

Returns

0 on success, negative error code on failure.