mxm_bitextract.c File Reference

Bit extraction function for mxm_17841b. More...

#include "mxm_bitextract.h"

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Functions
static MXM_41B_REG_BIT_VALUE	bitValue (MXM_41B_REG_BIT_VALUE value, uint8_t numberOfBits, MXM_41B_REG_BITS position, MXM_41B_REG_BITS shift)
	Extract a bit value function. More...
MXM_41B_REG_BIT_VALUE	mxm_41bReadValue (uint8_t reg, uint8_t numberOfBits, MXM_41B_REG_BITS position)
	read a value from a register supplied as variable More...
MXM_41B_REG_BIT_VALUE	mxm_41bWriteValue (MXM_41B_REG_BIT_VALUE value, uint8_t numberOfBits, MXM_41B_REG_BITS shift, uint8_t reg)
	write a value to a register supplied as variable More...

Detailed Description

Bit extraction function for mxm_17841b.

Copyright

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Author

foxBMS Team

Date

2019-01-15 (date of creation)

Updated

2021-12-06 (date of last update)

Prefix

MXM

This module supplies a specific bit extraction functionality to read & write into status registers. The different statuses that are read from or write into are indicated in the enum. Battery monitoring driver for MAX1785x battery monitoring ICs.

Definition in file mxm_bitextract.c.

Function Documentation

bitValue()

static MXM_41B_REG_BIT_VALUE bitValue ( MXM_41B_REG_BIT_VALUE  value, uint8_t  numberOfBits, MXM_41B_REG_BITS  position, MXM_41B_REG_BITS  shift  )

static

Extract a bit value function.

The function is used to extract some number of bits (numOfBits) from a position (pos) to write or read from the configuration and status registers.

Parameters

[in]	value	value of the bits that shall be written or read
[in]	numberOfBits	number of bits to be extracted from the value register
[in]	position	position of bits to be extracted from the value register, start from right to left
[in]	shift	number of bit-shift to the left for read function the shift value is zero.

Returns

bit values for registers

Definition at line 90 of file mxm_bitextract.c.

mxm_41bReadValue()

MXM_41B_REG_BIT_VALUE mxm_41bReadValue	(	uint8_t	reg,
		uint8_t	numberOfBits,
		MXM_41B_REG_BITS	position
	)

read a value from a register supplied as variable

This function takes a register (reg), and extracts the data described by its length in bits (numberOfBits) and position (pos). This value is then returned.

Parameters

[in]	reg	value of the register to be read
[in]	numberOfBits	length og the bit sequence in bits
[in]	position	start position of the bit sequence

Returns

the isolated and shifted bit value

Definition at line 101 of file mxm_bitextract.c.

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mxm_41bWriteValue()

MXM_41B_REG_BIT_VALUE mxm_41bWriteValue	(	MXM_41B_REG_BIT_VALUE	value,
		uint8_t	numberOfBits,
		MXM_41B_REG_BITS	shift,
		uint8_t	reg
	)

write a value to a register supplied as variable

This function takes a register (reg), writes the data described by numberOFBits, shift and value to the register value and returns the updated register.

Parameters

[in]	value	register value that should be written to the register
[in]	numberOfBits	length of the entry that should be written in bits
[in]	shift	start position in the register in bits
[in]	reg	complete value of the register

Returns

updated value of the register

Definition at line 105 of file mxm_bitextract.c.

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