btnut/btnode/include/dev/adc2.h File Reference

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Detailed Description

adc driver to sample multiple channels by different components

Date:

16.05.2006

Author:

bosterm

Typedefs
typedef enum adc2_channel_type	adc2_channel_t
typedef enum adc2_interrupt_type	adc2_interrupt_t
typedef enum adc2_mode_type	adc2_mode_t
typedef enum adc2_prescaler_type	adc2_prescaler_t
typedef enum adc2_ref_type	adc2_ref_t
Enumerations
enum	adc2_channel_type {   ADC2_CHANNEL_0 = 0, ADC2_CHANNEL_1 = 1, ADC2_CHANNEL_2 = 2, ADC2_CHANNEL_3 = 3,   ADC2_CHANNEL_4 = 4, ADC2_CHANNEL_5 = 5, ADC2_CHANNEL_6 = 6, ADC2_CHANNEL_7 = 7 }
enum	adc2_interrupt_type { ADC2_INTERRUPT_DISABLE = 0, ADC2_INTERRUPT_ENABLE = 1 << 3 }
enum	adc2_mode_type { ADC2_MODE_SINGLE_CONVERSION = 0, ADC2_MODE_FREE_RUNNING = 1 << 5 }
enum	adc2_prescaler_type {   ADC2_PRESCALE_DIV2 = 0x00, ADC2_PRESCALE_DIV4 = 0x02, ADC2_PRESCALE_DIV8 = 0x03, ADC2_PRESCALE_DIV16 = 0x04,   ADC2_PRESCALE_DIV32 = 0x05, ADC2_PRESCALE_DIV64 = 0x06, ADC2_PRESCALE_DIV128 = 0x07 }
enum	adc2_ref_type { ADC2_REF_AREF = 0, ADC2_REF_AVCC = 1 << 6, ADC2_REF_INTERNAL_256 = 3 << 6 }
Functions
u_short	adc2_init (adc2_mode_t mode, adc2_interrupt_t use_interrupt, adc2_prescaler_t prescaler, adc2_channel_t channel, adc2_ref_t reference)
u_short	adc2_read (u_short handle)

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Enumeration Type Documentation

enum adc2_prescaler_type

Enumerator:

ADC2_PRESCALE_DIV2	0x01,0x00 -> CPU clk/2
ADC2_PRESCALE_DIV4	0x02 -> CPU clk/4
ADC2_PRESCALE_DIV8	0x03 -> CPU clk/8
ADC2_PRESCALE_DIV16	0x04 -> CPU clk/16
ADC2_PRESCALE_DIV32	0x05 -> CPU clk/32
ADC2_PRESCALE_DIV64	0x06 -> CPU clk/64
ADC2_PRESCALE_DIV128	0x07 -> CPU clk/128

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Function Documentation

u_short adc2_init	(	adc2_mode_t	mode,
		adc2_interrupt_t	use_interrupt,
		adc2_prescaler_t	prescaler,
		adc2_channel_t	channel,
		adc2_ref_t	reference
	)

Initializes the ADC.

Note:

The returned handle has to be kept in order to be used by adc2_read().

Returns:

a handle

u_short adc2_read

(

u_short

handle

)

Samples a value.

Note:

the handle assures that the adc is properly configure. this allows to access the adc concurrently with different configurations.

Parameters:

the

handle retrieved by adc2_init

Returns:

a handle

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