Debug and low-level functions

Classes
struct	iio_data_format
	Contains the format of a data sample. More...

Macros
#define	iio_device_debug_attr_read(dev, attr, ptr)
	Read the content of the given debug attribute. More...
#define	iio_device_debug_attr_write(dev, attr, val)
	Set the value of the given debug attribute. More...

Functions
__api struct iio_channels_mask *	iio_create_channels_mask (unsigned int nb_channels)
	Create a new empty channels mask. More...
__api void	iio_channels_mask_destroy (struct iio_channels_mask *mask)
	Destroy a channels mask. More...
__api __check_ret ssize_t	iio_device_get_sample_size (const struct iio_device *dev, const struct iio_channels_mask *mask)
	Get the current sample size. More...
__api __check_ret __pure long	iio_channel_get_index (const struct iio_channel *chn)
	Get the index of the given channel. More...
__api __check_ret __cnst const struct iio_data_format *	iio_channel_get_data_format (const struct iio_channel *chn)
	Get a pointer to a channel's data format structure. More...
__api void	iio_channel_convert (const struct iio_channel *chn, void *dst, const void *src)
	Convert the sample from hardware format to host format. More...
__api void	iio_channel_convert_inverse (const struct iio_channel *chn, void *dst, const void *src)
	Convert the sample from host format to hardware format. More...
__api __check_ret __pure unsigned int	iio_device_get_debug_attrs_count (const struct iio_device *dev)
	Enumerate the debug attributes of the given device. More...
__api __check_ret __pure const char *	iio_device_get_debug_attr (const struct iio_device *dev, unsigned int index)
	Get the debug attribute present at the given index. More...
__api __check_ret __pure const char *	iio_device_find_debug_attr (const struct iio_device *dev, const char *name)
	Try to find a debug attribute by its name. More...
__api __check_ret ssize_t	iio_device_debug_attr_read_raw (const struct iio_device *dev, const char *attr, char *dst, size_t len)
	Read the content of the given debug attribute. More...
__api __check_ret ssize_t	iio_device_debug_attr_write_raw (const struct iio_device *dev, const char *attr, const void *src, size_t len)
	Set the value of the given debug attribute. More...
__api __check_ret int	iio_device_identify_filename (const struct iio_device *dev, const char *filename, struct iio_channel **chn, const char **attr)
	Identify the channel or debug attribute corresponding to a filename. More...
__api __check_ret int	iio_device_reg_write (struct iio_device *dev, uint32_t address, uint32_t value)
	Set the value of a hardware register. More...
__api __check_ret int	iio_device_reg_read (struct iio_device *dev, uint32_t address, uint32_t *value)
	Get the value of a hardware register. More...

Detailed Description

Macro Definition Documentation

iio_device_debug_attr_read

#define iio_device_debug_attr_read	(		dev,
			attr,
			ptr
	)

Value:

_Generic((ptr),                         \
         bool *: iio_device_debug_attr_read_bool,       \
         long long *: iio_device_debug_attr_read_longlong,  \
         double *: iio_device_debug_attr_read_double)(dev, attr, ptr)

Read the content of the given debug attribute.

Parameters

dev	A pointer to an iio_device structure
attr	A NULL-terminated string corresponding to the name of the debug attribute
ptr	A pointer to a variable where the value should be stored

Returns

On success, 0 is returned

On error, a negative errno code is returned

iio_device_debug_attr_write

#define iio_device_debug_attr_write	(		dev,
			attr,
			val
	)

Value:

_Generic((val),                         \
         const char *: iio_device_debug_attr_write_string,  \
         char *: iio_device_debug_attr_write_string,        \
         bool: iio_device_debug_attr_write_bool,        \
         long long: iio_device_debug_attr_write_longlong,   \
         double: iio_device_debug_attr_write_double)(dev, attr, val)

Set the value of the given debug attribute.

Parameters

dev	A pointer to an iio_device structure
attr	A NULL-terminated string corresponding to the name of the debug attribute
val	A double value to set the debug attribute to

Returns

On success, 0 is returned

On error, a negative errno code is returned

Function Documentation

iio_channel_convert()

__api void iio_channel_convert	(	const struct iio_channel *	chn,
		void *	dst,
		const void *	src
	)

Convert the sample from hardware format to host format.

Parameters

chn	A pointer to an iio_channel structure
dst	A pointer to the destination buffer where the converted sample should be written
src	A pointer to the source buffer containing the sample

iio_channel_convert_inverse()

__api void iio_channel_convert_inverse	(	const struct iio_channel *	chn,
		void *	dst,
		const void *	src
	)

Convert the sample from host format to hardware format.

Parameters

chn	A pointer to an iio_channel structure
dst	A pointer to the destination buffer where the converted sample should be written
src	A pointer to the source buffer containing the sample

iio_channel_get_data_format()

__api __check_ret __cnst const struct iio_data_format* iio_channel_get_data_format

(

const struct iio_channel *

chn

)

Get a pointer to a channel's data format structure.

Parameters

chn	A pointer to an iio_channel structure

Returns

A pointer to the channel's iio_data_format structure

iio_channel_get_index()

__api __check_ret __pure long iio_channel_get_index

(

const struct iio_channel *

chn

)

Get the index of the given channel.

Parameters

chn	A pointer to an iio_channel structure

Returns

On success, the index of the specified channel

On error, a negative errno code is returned

iio_channels_mask_destroy()

__api void iio_channels_mask_destroy

(

struct iio_channels_mask *

mask

)

Destroy a channels mask.

Parameters

mask	A pointer to an iio_channels_mask structure

iio_create_channels_mask()

__api struct iio_channels_mask* iio_create_channels_mask

(

unsigned int

nb_channels

)

Create a new empty channels mask.

Parameters

nb_channels

The number of channels in the mask

Returns

On success, a pointer to an iio_channels_mask structure

On error, NULL is returned

iio_device_debug_attr_read_raw()

__api __check_ret ssize_t iio_device_debug_attr_read_raw	(	const struct iio_device *	dev,
		const char *	attr,
		char *	dst,
		size_t	len
	)

Read the content of the given debug attribute.

Parameters

dev	A pointer to an iio_device structure
attr	A NULL-terminated string corresponding to the name of the debug attribute
dst	A pointer to the memory area where the NULL-terminated string corresponding to the value read will be stored
len	The available length of the memory area, in bytes

Returns

On success, the number of bytes written to the buffer

On error, a negative errno code is returned

iio_device_debug_attr_write_raw()

__api __check_ret ssize_t iio_device_debug_attr_write_raw	(	const struct iio_device *	dev,
		const char *	attr,
		const void *	src,
		size_t	len
	)

Set the value of the given debug attribute.

Parameters

dev	A pointer to an iio_device structure
attr	A NULL-terminated string corresponding to the name of the debug attribute
src	A pointer to the data to be written
len	The number of bytes that should be written

Returns

On success, the number of bytes written

On error, a negative errno code is returned

iio_device_find_debug_attr()

__api __check_ret __pure const char* iio_device_find_debug_attr	(	const struct iio_device *	dev,
		const char *	name
	)

Try to find a debug attribute by its name.

Parameters

dev	A pointer to an iio_device structure
name	A NULL-terminated string corresponding to the name of the debug attribute

Returns

On success, a pointer to a static NULL-terminated string

If the name does not correspond to any known debug attribute of the given device, NULL is returned

NOTE: This function is useful to detect the presence of a debug attribute. It can also be used to retrieve the name of a debug attribute as a pointer to a static string from a dynamically allocated string.

iio_device_get_debug_attr()

__api __check_ret __pure const char* iio_device_get_debug_attr	(	const struct iio_device *	dev,
		unsigned int	index
	)

Get the debug attribute present at the given index.

Parameters

dev	A pointer to an iio_device structure
index	The index corresponding to the debug attribute

Returns

On success, a pointer to a static NULL-terminated string

If the index is invalid, NULL is returned

iio_device_get_debug_attrs_count()

__api __check_ret __pure unsigned int iio_device_get_debug_attrs_count

(

const struct iio_device *

dev

)

Enumerate the debug attributes of the given device.

Parameters

dev	A pointer to an iio_device structure

Returns

The number of debug attributes found

iio_device_get_sample_size()

__api __check_ret ssize_t iio_device_get_sample_size	(	const struct iio_device *	dev,
		const struct iio_channels_mask *	mask
	)

Get the current sample size.

Parameters

dev	A pointer to an iio_device structure
mask	A pointer to an iio_channels_mask structure. If NULL, the current channel mask of the iio_device object is used.

Returns

On success, the sample size in bytes

On error, a negative errno code is returned

NOTE: The sample size is not constant and will change when channels get enabled or disabled.

iio_device_identify_filename()

__api __check_ret int iio_device_identify_filename	(	const struct iio_device *	dev,
		const char *	filename,
		struct iio_channel **	chn,
		const char **	attr
	)

Identify the channel or debug attribute corresponding to a filename.

Parameters

dev	A pointer to an iio_device structure
filename	A NULL-terminated string corresponding to the filename
chn	A pointer to a pointer of an iio_channel structure. The pointed pointer will be set to the address of the iio_channel structure if the filename correspond to the attribute of a channel, or NULL otherwise.
attr	A pointer to a NULL-terminated string. The pointer pointer will be set to point to the name of the attribute corresponding to the filename.

Returns

On success, 0 is returned, and *chn and *attr are modified.

On error, a negative errno code is returned. *chn and *attr are not modified.

iio_device_reg_read()

__api __check_ret int iio_device_reg_read	(	struct iio_device *	dev,
		uint32_t	address,
		uint32_t *	value
	)

Get the value of a hardware register.

Parameters

dev	A pointer to an iio_device structure
address	The address of the register
value	A pointer to the variable where the value will be written

Returns

On success, 0 is returned

On error, a negative errno code is returned

iio_device_reg_write()

__api __check_ret int iio_device_reg_write	(	struct iio_device *	dev,
		uint32_t	address,
		uint32_t	value
	)

Set the value of a hardware register.

Parameters

dev	A pointer to an iio_device structure
address	The address of the register
value	The value to set the register to

Returns

On success, 0 is returned

On error, a negative errno code is returned