iio_adc_demo.c File Reference

Implementation of iio_adc_demo. More...

#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include "no_os_error.h"
#include "no_os_util.h"
#include "iio_adc_demo.h"
#include "iio.h"

Include dependency graph for iio_adc_demo.c:

Macros
#define	ADC_DEMO_ATTR(_name, _priv)
#define	IIO_DEMO_ADC_CHANNEL(_idx)

Functions
int	get_adc_demo_attr (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t attr_id)
	get attributes for adc. More...
int	set_adc_demo_attr (void *device, char *buf, uint32_t len, const struct iio_ch_info *channel, intptr_t attr_id)
	set attributes for adc. More...
int32_t	adc_submit_samples (struct iio_device_data *dev_data)
	function for reading samples from the device. More...
int32_t	adc_demo_trigger_handler (struct iio_device_data *dev_data)
	Handles trigger: reads one data-set and writes it to the buffer. More...

Variables
struct scan_type	adc_scan_type
struct iio_attribute	adc_channel_attributes []
struct iio_attribute	iio_adc_global_attributes []
struct iio_device	adc_demo_iio_descriptor

Detailed Description

Implementation of iio_adc_demo.

Author

Andrei Drimbarean (andre.nosp@m.i.dr.nosp@m.imbar.nosp@m.ean@.nosp@m.analo.nosp@m.g.co.nosp@m.m)

Copyright 2021(c) Analog Devices, Inc.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
3. Neither the name of Analog Devices, Inc. nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY ANALOG DEVICES, INC. “AS IS” AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANALOG DEVICES, INC. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Macro Definition Documentation

ADC_DEMO_ATTR

#define ADC_DEMO_ATTR	(		_name,
			_priv
	)

Value:

    {\
    .name = _name,\
    .priv = _priv,\
    .show = get_adc_demo_attr,\
    .store = set_adc_demo_attr \
}

IIO_DEMO_ADC_CHANNEL

#define IIO_DEMO_ADC_CHANNEL

(

_idx

)

Value:

    {\
    .name = "adc_in_ch" # _idx,\
    .ch_type = IIO_VOLTAGE,\
    .channel = _idx,\
    .scan_index = _idx,\
    .indexed = true,\
    .scan_type = &adc_scan_type,\
    .attributes = adc_channel_attributes,\
    .ch_out = false,\
}

Function Documentation

adc_demo_trigger_handler()

int32_t adc_demo_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.

adc_submit_samples()

int32_t adc_submit_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.

get_adc_demo_attr()

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

get attributes for adc.

Parameters

device-	Physical instance of a iio_demo_device.
buf	- Where value is stored.
len	- Maximum length of value to be stored in buf.
channel	- Channel properties.
attr_id	- Attribute ID

Returns

Length of chars written in buf, or negative value on failure.

set_adc_demo_attr()

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

set attributes for adc.

Parameters

device	- Physical instance of a iio_demo_device.
buf	- Value to be written to attribute.
len	- Length of the data in "buf".
channel	- Channel properties.
attr_id	- Attribute ID

Returns

: Number of bytes written to device, or negative value on failure.

Variable Documentation

adc_channel_attributes

struct iio_attribute adc_channel_attributes[]

Initial value:

= {
    ADC_DEMO_ATTR("adc_channel_attr", ADC_CHANNEL_ATTR),
    END_ATTRIBUTES_ARRAY,
}

adc_demo_iio_descriptor

struct iio_device adc_demo_iio_descriptor

Initial value:

= {
    .num_ch = TOTAL_ADC_CHANNELS,
    .channels = iio_adc_channels,
    .attributes = iio_adc_global_attributes,
    .debug_attributes = NULL,
    .buffer_attributes = NULL,
    .pre_enable = update_adc_channels,
    .post_disable = close_adc_channels,
    .trigger_handler = (int32_t (*)())adc_demo_trigger_handler,
    .submit = (int32_t (*)())adc_submit_samples,
    .debug_reg_read = (int32_t (*)()) adc_demo_reg_read,
    .debug_reg_write = (int32_t (*)()) adc_demo_reg_write
}

adc_scan_type

struct scan_type adc_scan_type

Initial value:

= {
    .sign = 's',
    .realbits = 16,
    .storagebits = 16,
    .shift = 0,
    .is_big_endian = false
}

iio_adc_global_attributes

struct iio_attribute iio_adc_global_attributes[]

Initial value:

= {
    ADC_DEMO_ATTR("adc_global_attr", ADC_GLOBAL_ATTR),
    END_ATTRIBUTES_ARRAY,
}