adc_temp.h File Reference

ADC temperature sensor macro definition and prototype.

Copyright (c) 2015-2018 Microchip Technology Inc. and its subsidiaries.

Macros
#define	ADC_12BIT_FULL_SCALE_VALUE_FLOAT   4095.0
#define	ADC_TEMP_SAMPLE_LENGTH   4
#define	INT1V_DIVIDER_1000   1000.0
#define	INT1V_VALUE_FLOAT   1.0
#define	TEMP_LOG_READ_NVM1   (*(RwReg*)NVMCTRL_TEMP_LOG)
#define	TEMP_LOG_READ_NVM2   (*(RwReg*)NVMCTRL_TEMP_LOG + 4)

Functions
float	calculate_temperature (uint16_t raw_code)
	Temperature Calculation. More...
void	configure_adc_temp (void)
	ADC Temperature Sensor mode configuration. More...
float	convert_dec_to_frac (uint8_t val)
	Decimal to Fraction Conversation. More...
void	load_calibration_data (void)
	Calibration Data. More...

#define ADC_12BIT_FULL_SCALE_VALUE_FLOAT   4095.0

Referenced by calculate_temperature(), and load_calibration_data().

#define ADC_TEMP_SAMPLE_LENGTH   4

Referenced by configure_adc_temp().

#define INT1V_DIVIDER_1000   1000.0

Referenced by load_calibration_data().

#define INT1V_VALUE_FLOAT   1.0

Referenced by calculate_temperature().

#define TEMP_LOG_READ_NVM1   (*(RwReg*)NVMCTRL_TEMP_LOG)

#define TEMP_LOG_READ_NVM2   (*(RwReg*)NVMCTRL_TEMP_LOG + 4)

float calculate_temperature

(

uint16_t

raw_code

)

Temperature Calculation.

This function calculate fine temperature using Equation1 and Equation 1b as mentioned in data sheet section "Temperature Sensor Characteristics" of Electrical Characteristics.

References ADC_12BIT_FULL_SCALE_VALUE_FLOAT, coarse_temp, fine_temp, INT1V_VALUE_FLOAT, INT1VH, INT1VR, tempH, tempR, VADCH, and VADCR.

Referenced by adc_temp_sensor().

void configure_adc_temp

(

void

)

ADC Temperature Sensor mode configuration.

This function enables internal temperature sensor feature of ADC with below Settings

GLCK for ADC -> GCLK_GENERATOR_1 (8MHz) CLK_ADC -> 512 KHz REFERENCE -> internal 1 V POSITIVE INPUT -> INTRENAL Temperature reference NEGATIVE INPUT -> SAMPLES -> 4 SAMPLE_LENGTH -> 4

References adc_enable(), adc_get_config_defaults(), adc_init(), adc_instance, ADC_TEMP_SAMPLE_LENGTH, and GCLK_GENERATOR_1.

Referenced by adc_temp_sensor().

float convert_dec_to_frac

(

uint8_t

val

)

Decimal to Fraction Conversation.

This function converts the decimal value into fractional and return the fractional value for temperature calculation

Referenced by load_calibration_data().

void load_calibration_data

(

void

)

Calibration Data.

This function extract the production calibration data information from Temperature log row content and store it variables for temperature calculation

References ADC_12BIT_FULL_SCALE_VALUE_FLOAT, ADCH, ADCR, convert_dec_to_frac(), INT1V_DIVIDER_1000, INT1VH, INT1VR, tempH, tempR, VADCH, and VADCR.

Referenced by adc_temp_sensor().