adc.h File Reference

megaAVR ADC driver for ATmegaxx4, ATmegaxx4/A/P/PA, ATmegaxx0/xx1, ATmegaxx8 ATmegaxxxRF and ATmegaxx8A/P/PA.

Copyright (c) 2011-2018 Microchip Technology Inc. and its subsidiaries.

#include "compiler.h"
#include "parts.h"
#include "adc_megaxx.h"

Macros
#define	ADC_ADTS_SOURCE_MASK   (1 << ADTS2 | 1 << ADTS1 | 1 << ADTS0)
#define	ADC_MUX_MASK   (1 << MUX3 | 1 << MUX2 | 1 << MUX1 | 1 << MUX0)
#define	ADC_PRESCALER_MASK   (1 << ADPS2 | 1 << ADPS1 | 1 << ADPS0)
#define	ADC_VREF_MASK   (1 << REFS1 | 1 << REFS0)

Enumerations
enum	adc_adjustment {   ADC_ADJUSTMENT_RIGHT = 0,   ADC_ADJUSTMENT_LEFT = (1 << ADLAR) }
enum	adc_auto_trigger_source {   ADC_AUTOTRIGGER_SOURCE_FREERUNNING = (0x0 << ADTS0),   ADC_AUTOTRIGGER_SOURCE_ANALOG_COMPARATOR = (0x1 << ADTS0),   ADC_AUTOTRIGGER_SOURCE_EIR0 = (0x2 << ADTS0),   ADC_AUTOTRIGGER_SOURCE_TC0_COMPARE = (0x3 << ADTS0),   ADC_AUTOTRIGGER_SOURCE_TC0_OVERFLOW = (0x4 << ADTS0),   ADC_AUTOTRIGGER_SOURCE_TC1_COMPARE_B = (0x5 << ADTS0),   ADC_AUTOTRIGGER_SOURCE_TC1_OVERFLOW = (0x6 << ADTS0),   ADC_AUTOTRIGGER_SOURCE_TC1_CAPTURE = (0x7 << ADTS0) }
	ADC Auto Trigger sources. More...
enum	adc_prescaler {   ADC_PRESCALER_DIV2 = (0x1 << ADPS0),   ADC_PRESCALER_DIV4 = (0x2 << ADPS0),   ADC_PRESCALER_DIV8 = (0x3 << ADPS0),   ADC_PRESCALER_DIV16 = (0x4 << ADPS0),   ADC_PRESCALER_DIV32 = (0x5 << ADPS0),   ADC_PRESCALER_DIV64 = (0x6 << ADPS0),   ADC_PRESCALER_DIV128 = (0x7 << ADPS0) }
	ADC prescaler settings. More...

Functions
static bool	adc_conversion_is_complete (void)
	Poll ADC conversion complete interrupt flag. More...
static void	adc_disable (void)
static void	adc_disable_autotrigger (void)
static void	adc_disable_interrupt (void)
static void	adc_enable (void)
static void	adc_enable_autotrigger (void)
static void	adc_enable_interrupt (void)
static uint16_t	adc_get_data_10bit (void)
static uint8_t	adc_get_data_8bit (void)
static void	adc_init (enum adc_prescaler prescaler)
	ADC initialization. More...
static uint16_t	adc_read_10bit (enum adc_mux_setting input, enum adc_voltage_reference vref)
	Blocking ADC conversion with 10-bit result. More...
static uint8_t	adc_read_8bit (enum adc_mux_setting input, enum adc_voltage_reference vref)
	Blocking ADC conversion with 8-bit result. More...
static void	adc_set_autotrigger_source (enum adc_auto_trigger_source trg)
	Set ADC Auto Trigger source. More...
static void	adc_set_mux (enum adc_mux_setting input)
	Select source from ADC input mux. More...
static void	adc_set_prescaler (enum adc_prescaler prescaler)
	Set ADC clock prescaler. More...
static void	adc_set_voltage_reference (enum adc_voltage_reference vref)
	Set the ADC voltage reference. More...
static void	adc_start_conversion (void)
Optimized functions for register accesses
These functions are for cases where you do not want the overhead of masking out bitfields before updating the register value. These will only do a write to the register instead of a read-modify-write.
static void	adc_set_admux (uint8_t regval)
	Set voltage reference, mux and adjustment bits in admux register. More...