Analog data conversion utilities

Utility functions for converting analog data samples. More...

Detailed Description

Utility functions for converting analog data samples.

Files
file	analog_util.h
	Analog utility function interfaces.

Functions
int32_t	adc_util_map (int sample, adc_res_t res, int32_t min, int32_t max)
	Map a sampled ADC value to a given range.
float	adc_util_mapf (int sample, adc_res_t res, float min, float max)
	Map a sampled ADC value to a given range (using floating point arithmetic)
uint16_t	dac_util_map (int value, int min, int max)
	Map a value out of the given range to a 16-bit unsigned int.
uint16_t	dac_util_mapf (float value, float min, float max)
	Helper function to map a given float value range to a valid DAC value.

Function Documentation

adc_util_map()

int32_t adc_util_map	(	int	sample,
		adc_res_t	res,
		int32_t	min,
		int32_t	max
	)

Map a sampled ADC value to a given range.

This function is useful for converting sampled ADC values into their physical representation.

Parameters

[in]	sample	sampled ADC value
[in]	res	ADC resolution
[in]	min	the lower bound of the target interval
[in]	max	the upper bound of the target interval

Returns

the mapped value

adc_util_mapf()

float adc_util_mapf	(	int	sample,
		adc_res_t	res,
		float	min,
		float	max
	)

Map a sampled ADC value to a given range (using floating point arithmetic)

See also

adc_util_map

Parameters

[in]	sample	sampled ADC value
[in]	res	ADC resolution
[in]	min	the lower bound of the target interval
[in]	max	the upper bound of the target interval

Returns

the mapped value

dac_util_map()

uint16_t dac_util_map	(	int	value,
		int	min,
		int	max
	)

Map a value out of the given range to a 16-bit unsigned int.

The min value is assumed to be smaller than max value and value is assumed to be between min and max.

Parameters

[in]	value	value to map to a DAC set value
[in]	min	the lower bound of the source interval
[in]	max	the upper bound of the source interval

Returns

the mapped value

dac_util_mapf()

uint16_t dac_util_mapf	(	float	value,
		float	min,
		float	max
	)

Helper function to map a given float value range to a valid DAC value.

See also

dac_util_map

Parameters

[in]	value	value to map to a DAC set value
[in]	min	the lower bound of the source interval
[in]	max	the upper bound of the source interval

Returns

the mapped value