A/D Converter

ATmega128 On-Chip ADC. More...

Collaboration diagram for A/D Converter:

Defines
#define	ADC_PRESCALE_DIV2   0x00
	0x01,0x00 -> CPU clk/2
#define	ADC_PRESCALE_DIV4   0x02
	0x02 -> CPU clk/4
#define	ADC_PRESCALE_DIV8   0x03
	0x03 -> CPU clk/8
#define	ADC_PRESCALE_DIV16   0x04
	0x04 -> CPU clk/16
#define	ADC_PRESCALE_DIV32   0x05
	0x05 -> CPU clk/32
#define	ADC_PRESCALE_DIV64   0x06
	0x06 -> CPU clk/64
#define	ADC_PRESCALE_DIV128   0x07
	0x07 -> CPU clk/128
#define	ADC_INITIAL_CHANNEL   ADC0
#define	ADC_INITIAL_REF   AVCC
#define	ADC_INITIAL_MODE   SINGLE_CONVERSION
#define	ADC_INITIAL_PRESCALE   ADC_PRESCALE_DIV64
#define	ADC_BUF_SIZE   16
#define	AVR_SLEEP_CTRL_REG   MCUCR
#define	_adc_buf_head   ADC_BUF_SIZE
#define	_adc_buf_tail   (ADC_BUF_SIZE+1)
Typedefs
typedef enum adc_ref_type	adc_ref_t
typedef enum adc_mode_type	adc_mode_t
typedef enum adc_channel_type	adc_channel_t
Enumerations
enum	adc_ref_type { AVCC = 0, AREF, INTERNAL_256 }
enum	adc_mode_type {   ADC_OFF, FREE_RUNNING, SINGLE_CONVERSION, ADC_OFF,   FREE_RUNNING_T0, FREE_RUNNING_T1, FREE_RUNNING_T2, FREE_RUNNING_EXT,   SINGLE_CONVERSION }
Functions
void	ADCInit (void)
	Initialize the adc to the configured default values and enable interrupt.
void	ADCSetRef (adc_ref_t reference)
uint8_t	ADCSetPrescale (uint8_t prescalar)
void	ADCSetChannel (adc_channel_t adc_channel)
void	ADCBufferFlush (void)
void	ADCStartConversion (void)
	Start conversion.
void	ADCStartLowNoiseConversion (void)
void	ADCStopConversion (void)
uint8_t	ADCRead (uint16_t *value)
adc_mode_t	ADCGetMode (void)
int	ADCBufRead (uint16_t *buf, uint16_t *read)
int	ADCBufWrite (uint16_t *buf, uint16_t *write)
void	ADCBufInit (uint16_t *buf)
Variables
uint8_t	adc_sleep_mode = SLEEP_MODE_ADC
adc_mode_t	current_mode = ADC_OFF
uint16_t *	ADC_buffer = NULL
enum	adc_channel_type {   ADC0 = 0, ADC1 = 1, ADC2 = 2, ADC3 = 3,   ADC4 = 4, ADC5 = 5, ADC6 = 6, ADC7 = 7,   ADC0 = 0, ADC1 = 1, ADC2 = 2, ADC3 = 3,   ADC4 = 4, ADC5 = 5, ADC6 = 6, ADC7 = 7,   ADC_MAX_CHANNEL = 8 }
	enum declaring possible ADC channels More...

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Detailed Description

ATmega128 On-Chip ADC.

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Define Documentation

#define ADC_PRESCALE_DIV2   0x00

0x01,0x00 -> CPU clk/2

Referenced by ADCSetPrescale().

#define ADC_PRESCALE_DIV4   0x02

0x02 -> CPU clk/4

Referenced by ADCSetPrescale().

#define ADC_PRESCALE_DIV8   0x03

0x03 -> CPU clk/8

Referenced by ADCSetPrescale().

#define ADC_PRESCALE_DIV16   0x04

0x04 -> CPU clk/16

Referenced by ADCSetPrescale().

#define ADC_PRESCALE_DIV32   0x05

0x05 -> CPU clk/32

Referenced by ADCSetPrescale().

#define ADC_PRESCALE_DIV64   0x06

0x06 -> CPU clk/64

Referenced by ADCSetPrescale().

#define ADC_PRESCALE_DIV128   0x07

0x07 -> CPU clk/128

Referenced by ADCSetPrescale().

#define ADC_INITIAL_CHANNEL   ADC0

Referenced by ADCInit().

#define ADC_INITIAL_REF   AVCC

Referenced by ADCInit().

#define ADC_INITIAL_MODE   SINGLE_CONVERSION

Referenced by ADCInit().

#define ADC_INITIAL_PRESCALE   ADC_PRESCALE_DIV64

Referenced by ADCInit().

#define ADC_BUF_SIZE   16

Referenced by ADCBufRead(), ADCBufWrite(), and ADCInit().

#define AVR_SLEEP_CTRL_REG   MCUCR

Referenced by ADCStartLowNoiseConversion().

#define _adc_buf_head   ADC_BUF_SIZE

Referenced by ADCBufInit(), ADCBufRead(), and ADCBufWrite().

#define _adc_buf_tail   (ADC_BUF_SIZE+1)

Referenced by ADCBufInit(), ADCBufRead(), and ADCBufWrite().

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Typedef Documentation

typedef enum adc_ref_type adc_ref_t

typedef enum adc_mode_type adc_mode_t

typedef enum adc_channel_type adc_channel_t

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Enumeration Type Documentation

enum adc_ref_type

Enumerator:

AVCC
AREF
INTERNAL_256

enum adc_mode_type

Enumerator:

ADC_OFF
FREE_RUNNING
SINGLE_CONVERSION
ADC_OFF
FREE_RUNNING_T0
FREE_RUNNING_T1
FREE_RUNNING_T2
FREE_RUNNING_EXT
SINGLE_CONVERSION

enum adc_channel_type

enum declaring possible ADC channels

dev/at91_adc.h

Enumerator:

ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
ADC6
ADC7
ADC_MAX_CHANNEL

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Function Documentation

void ADCInit

(

void

)

Initialize the adc to the configured default values and enable interrupt.

void ADCSetRef

(

adc_ref_t

reference

)

References ADCStopConversion(), AREF, AVCC, cbi, INTERNAL_256, and sbi.

Referenced by ADCInit().

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uint8_t ADCSetPrescale

(

uint8_t

prescalar

)

References ADC_PRESCALE_DIV128, ADC_PRESCALE_DIV16, ADC_PRESCALE_DIV2, ADC_PRESCALE_DIV32, ADC_PRESCALE_DIV4, ADC_PRESCALE_DIV64, ADC_PRESCALE_DIV8, ADCStopConversion(), cbi, and sbi.

Referenced by ADCInit().

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void ADCSetChannel

(

adc_channel_t

adc_channel

)

References inb, and outb.

Referenced by ADCInit().

void ADCBufferFlush

(

void

)

References ADC_buffer, and ADCBufInit().

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void ADCStartConversion

(

void

)

Start conversion.

void ADCStartLowNoiseConversion

(

void

)

References _BV, adc_sleep_mode, ADCSetMode(), AVR_SLEEP_CTRL_REG, sbi, and SINGLE_CONVERSION.

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void ADCStopConversion

(

void

)

References cbi, current_mode, FREE_RUNNING, and sbi.

Referenced by ADCSetMode(), ADCSetPrescale(), and ADCSetRef().

uint8_t ADCRead

(

uint16_t *

value

)

References ADC_buffer, and ADCBufRead().

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adc_mode_t ADCGetMode

(

void

)

[inline]

References current_mode.

int ADCBufRead	(	uint16_t *	buf,
		uint16_t *	read
	)		[inline]

References _adc_buf_head, _adc_buf_tail, and ADC_BUF_SIZE.

int ADCBufWrite	(	uint16_t *	buf,
		uint16_t *	write
	)		[inline]

References _adc_buf_head, _adc_buf_tail, and ADC_BUF_SIZE.

void ADCBufInit

(

uint16_t *

buf

)

References _adc_buf_head, and _adc_buf_tail.

Referenced by ADCBufferFlush(), and ADCInit().

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Variable Documentation

uint8_t adc_sleep_mode = SLEEP_MODE_ADC

Referenced by ADCStartLowNoiseConversion().

adc_mode_t current_mode = ADC_OFF

Referenced by ADCGetMode(), ADCSetMode(), and ADCStopConversion().

uint16_t* ADC_buffer = NULL

Referenced by ADCBufferFlush(), ADCInit(), and ADCRead().