Temperature sensor functions

Functions for temperature measurements and sensor calibration. The granularity of all temperature values is given in the level of Celsius degrees. More...

Data Structures
struct	hw_gpadc_calibration_point_t
	Calibration Data - (Temperature, 16-bit ADC value) pair. More...

Functions
int16_t	hw_gpadc_convert_to_celsius_x100_util (const hw_gpadc_config_t *cfg, uint16_t raw_val)
	Convert a 16-bit, left-aligned, raw value to temperature. For accurate conversions using this function the ADC should operate in the following configuration: More...
uint16_t	hw_gpadc_convert_celsius_x100_to_raw_val_util (const hw_gpadc_config_t *cfg, int16_t temperature)
	Convert a temperature value to raw GPADC value. More...
void	hw_gpadc_store_ambient_calibration_point (uint16_t raw_val, int16_t temp)
	Store temperature calibration point at ambient temperature. More...

Detailed Description

Functions for temperature measurements and sensor calibration. The granularity of all temperature values is given in the level of Celsius degrees.

Function Documentation

hw_gpadc_convert_celsius_x100_to_raw_val_util()

uint16_t hw_gpadc_convert_celsius_x100_to_raw_val_util	(	const hw_gpadc_config_t *	cfg,
		int16_t	temperature
	)

Convert a temperature value to raw GPADC value.

Parameters

[in]	cfg	GPADC configuration, NULL to use the current ADC settings
[in]	temperature	temperature in hundredths of Celsius degrees (ex. 2540 = 25.4 C)

Returns

16-bit left-aligned ADC value (raw)

hw_gpadc_convert_to_celsius_x100_util()

int16_t hw_gpadc_convert_to_celsius_x100_util	(	const hw_gpadc_config_t *	cfg,
		uint16_t	raw_val
	)

Convert a 16-bit, left-aligned, raw value to temperature. For accurate conversions using this function the ADC should operate in the following configuration:

Positive and negative offset registers = Default (0x200 uncalibrated), SampleTime = 0x02, Oversampling = 64 Samples, Chopping = Enabled and Attenuator = Disabled.

Parameters

[in]	cfg	GPADC configuration, NULL to use the current ADC settings
[in]	raw_val	digital GPADC value

Returns

temperature in hundredths of Celsius degrees (ex. 2540 = 25.4 C)

See also

hw_gpadc_config_t

hw_gpadc_set_offset_positive

hw_gpadc_set_offset_negative

hw_gpadc_store_ambient_calibration_point()

void hw_gpadc_store_ambient_calibration_point	(	uint16_t	raw_val,
		int16_t	temp
	)

Store temperature calibration point at ambient temperature.

Parameters

[in]	raw_val	ADC calibration value in 16-bit resolution
[in]	temp	temperature in (Celsius degrees x 100)