iio_pqm.c File Reference

#include "iio_pqm.h"

Include dependency graph for iio_pqm.c:

Macros
#define	PQM_VOLTAGE_CHANNEL(_idx, _scan_idx, _name)
#define	PQM_CURRENT_CHANNEL(_idx, _scan_idx, _name)

Functions
int	read_pqm_attr (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t attr_id)
	Read a pqm device attribute. More...
int	write_pqm_attr (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t attr_id)
	Write a pqm device attribute. More...
int	read_ch_attr (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t attr_id)
	Read a channel attribute. More...
int32_t	read_samples (struct iio_device_data *dev_data)
	function for reading samples from the device. More...
int32_t	pqm_trigger_handler (struct iio_device_data *dev_data)
	Handles trigger: reads one data-set and writes it to the buffer. More...

Variables
volatile bool	configChanged = false
volatile bool	processData = true
struct iio_attribute	voltage_pqm_attributes []
struct iio_attribute	current_pqm_attributes []
struct iio_attribute	global_pqm_attributes []
struct scan_type	pqm_scan_type
struct iio_device	pqm_iio_descriptor

Macro Definition Documentation

PQM_CURRENT_CHANNEL

#define PQM_CURRENT_CHANNEL	(		_idx,
			_scan_idx,
			_name
	)

Value:

  {                                                                            \
    .name = _name, .ch_type = IIO_CURRENT, .channel = _idx,                    \
    .scan_index = _scan_idx, .indexed = true, .scan_type = &pqm_scan_type,     \
    .attributes = current_pqm_attributes, .ch_out = false                      \
  }

PQM_VOLTAGE_CHANNEL

#define PQM_VOLTAGE_CHANNEL	(		_idx,
			_scan_idx,
			_name
	)

Value:

  {                                                                            \
    .name = _name, .ch_type = IIO_VOLTAGE, .channel = _idx,                    \
    .scan_index = _scan_idx, .indexed = true, .scan_type = &pqm_scan_type,     \
    .attributes = voltage_pqm_attributes, .ch_out = false                      \
  }

Function Documentation

pqm_trigger_handler()

int32_t pqm_trigger_handler

(

struct iio_device_data *

dev_data

)

Handles trigger: reads one data-set and writes it to the buffer.

Parameters

dev_data

- The iio device data structure.

Returns

ret - Result of the handling procedure. In case of success, the size of the written data is returned.

read_ch_attr()

int read_ch_attr	(	void *	device,
		char *	buf,
		uint32_t	len,
		const struct iio_ch_info *	channel,
		intptr_t	attr_id
	)

Read a channel attribute.

Parameters

device	- The iio device structure
buf	- Buffer to be filled with requested data
len	- Length of the received command buffer in bytes
channel	- Command channel info
attr_id	- attribute descriptor

Returns

- The length of the buffer in case of success, negative value otherwise

read_pqm_attr()

int read_pqm_attr	(	void *	device,
		char *	buf,
		uint32_t	len,
		const struct iio_ch_info *	channel,
		intptr_t	attr_id
	)

Read a pqm device attribute.

Parameters

device	- The iio device structure
buf	- Buffer to be filled with requested data
len	- Length of the received command buffer in bytes
channel	- Command channel info
attr_id	- attribute descriptor

Returns

- The length of the buffer in case of success, negative value otherwise

read_samples()

int32_t read_samples

(

struct iio_device_data *

dev_data

)

function for reading samples from the device.

Parameters

dev_data

- The iio device data structure.

Returns

the number of read samples.

write_pqm_attr()

int write_pqm_attr	(	void *	device,
		char *	buf,
		uint32_t	len,
		const struct iio_ch_info *	channel,
		intptr_t	attr_id
	)

Write a pqm device attribute.

Parameters

device	- The iio device structure
buf	- Buffer to be filled with requested data
len	- Length of the received command buffer in bytes
channel	- Command channel info
attr_id	- attribute descriptor

Returns

- The length of the buffer in case of success, negative value otherwise

Variable Documentation

configChanged

volatile bool configChanged = false

current_pqm_attributes

struct iio_attribute current_pqm_attributes[]

global_pqm_attributes

struct iio_attribute global_pqm_attributes[]

pqm_iio_descriptor

struct iio_device pqm_iio_descriptor

Initial value:

= {
    .num_ch = TOTAL_PQM_CHANNELS,
    .channels = iio_pqm_channels,
    .attributes = global_pqm_attributes,
    .debug_attributes = NULL,
    .buffer_attributes = NULL,
    .pre_enable = update_pqm_channels,
    .post_disable = close_pqm_channels,
    .trigger_handler = (int32_t(*)())pqm_trigger_handler,
    .submit = (int32_t(*)())read_samples,
}

pqm_scan_type

struct scan_type pqm_scan_type

Initial value:

= {.sign = 'd',
    .realbits = 16,
    .storagebits = 16,
    .shift = 0,
    .is_big_endian =
        true
}

processData

volatile bool processData = true

voltage_pqm_attributes

struct iio_attribute voltage_pqm_attributes[]