These accessors are inlined and are used to perform the operations on avr_regbit_t definitions. More...

Macros
#define	ARRAY_SIZE(_aa) (sizeof(_aa) / sizeof((_aa)[0]))

#define	AVR_IO_REGBIT(_io, _bit) { . reg = (_io), .bit = (_bit), .mask = 1 }

#define	AVR_IO_REGBITS(_io, _bit, _mask) { . reg = (_io), .bit = (_bit), .mask = (_mask) }

Functions
static uint8_t	avr_regbit_set (avr_t *avr, avr_regbit_t rb)
	Set/get/clear io register bits in one operation. More...

static uint8_t	avr_regbit_setto (avr_t *avr, avr_regbit_t rb, uint8_t v)

static uint8_t	avr_regbit_setto_raw (avr_t *avr, avr_regbit_t rb, uint8_t v)
	Set the 'raw' bits, if 'v' is the unshifted value of the bits. More...

static uint8_t	avr_regbit_get (avr_t *avr, avr_regbit_t rb)

static uint8_t	avr_regbit_from_value (avr_t *avr, avr_regbit_t rb, uint8_t value)
	Using regbit from value eliminates some of the set to test then clear register operations. More...

static uint8_t	avr_regbit_get_raw (avr_t *avr, avr_regbit_t rb)
	Return the bit(s) 'in position' instead of zero based. More...

static uint8_t	avr_regbit_clear (avr_t *avr, avr_regbit_t rb)

static uint8_t	avr_regbit_get_array (avr_t avr, avr_regbit_t rb, int count)
	This reads the bits for an array of avr_regbit_t, make up a "byte" with them. More...

static void	avr_regbit_set_array_from_value (avr_t avr, avr_regbit_t rb, uint8_t count, uint8_t value)
	Does the reverse of avr_regbit_get_array. More...

Detailed Description

These accessors are inlined and are used to perform the operations on avr_regbit_t definitions.

This is the "official" way to access bits into registers The small footprint costs brings much better versatility for functions/bits that are not always defined in the same place on real AVR cores

Macro Definition Documentation

#define ARRAY_SIZE ( _aa ) (sizeof(_aa) / sizeof((_aa)[0]))

#define AVR_IO_REGBIT	(	_io,
		_bit
	)	{ . reg = (_io), .bit = (_bit), .mask = 1 }

#define AVR_IO_REGBITS	(	_io,
		_bit,
		_mask
	)	{ . reg = (_io), .bit = (_bit), .mask = (_mask) }

Function Documentation

static uint8_t avr_regbit_clear	(	avr_t *	avr,
		avr_regbit_t	rb
	)

inlinestatic

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static uint8_t avr_regbit_from_value	(	avr_t *	avr,
		avr_regbit_t	rb,
		uint8_t	value
	)

inlinestatic

Using regbit from value eliminates some of the set to test then clear register operations.

makes cheking register bits before setting easier.

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static uint8_t avr_regbit_get	(	avr_t *	avr,
		avr_regbit_t	rb
	)

inlinestatic

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static uint8_t avr_regbit_get_array	(	avr_t *	avr,
		avr_regbit_t *	rb,
		int	count
	)

inlinestatic

This reads the bits for an array of avr_regbit_t, make up a "byte" with them.

This allows reading bits like CS0, CS1, CS2 etc even if they are not in the same physical IO register.

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static uint8_t avr_regbit_get_raw	(	avr_t *	avr,
		avr_regbit_t	rb
	)

inlinestatic

Return the bit(s) 'in position' instead of zero based.

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static uint8_t avr_regbit_set	(	avr_t *	avr,
		avr_regbit_t	rb
	)

inlinestatic

Set/get/clear io register bits in one operation.

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static void avr_regbit_set_array_from_value	(	avr_t *	avr,
		avr_regbit_t *	rb,
		uint8_t	count,
		uint8_t	value
	)

inlinestatic

Does the reverse of avr_regbit_get_array.

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static uint8_t avr_regbit_setto	(	avr_t *	avr,
		avr_regbit_t	rb,
		uint8_t	v
	)

inlinestatic

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static uint8_t avr_regbit_setto_raw	(	avr_t *	avr,
		avr_regbit_t	rb,
		uint8_t	v
	)

inlinestatic

Set the 'raw' bits, if 'v' is the unshifted value of the bits.

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Macros

Functions

Detailed Description

Macro Definition Documentation

Function Documentation