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#ifndef _IIO_UTILS_H_
#define _IIO_UTILS_H_
/* IIO - useful set of util functionality
* Copyright (c) 2008 Jonathan Cameron
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
#include <stdint.h>
/* Made up value to limit allocation sizes */
#define FORMAT_SCAN_ELEMENTS_DIR "%s/scan_elements"
#define FORMAT_TYPE_FILE "%s_type"
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof(arr[0]))
extern const char *iio_dir;
* struct iio_channel_info - information about a given channel
* @name: channel name
* @generic_name: general name for channel type
* @scale: scale factor to be applied for conversion to si units
* @offset: offset to be applied for conversion to si units
* @index: the channel index in the buffer output
* @bytes: number of bytes occupied in buffer output
* @bits_used: number of valid bits of data
* @shift: amount of bits to shift right data before applying bit mask
* @mask: a bit mask for the raw output
* @be: flag if data is big endian
* @is_signed: is the raw value stored signed
* @location: data offset for this channel inside the buffer (in bytes)
struct iio_channel_info {
char *name;
char *generic_name;
float scale;
float offset;
unsigned index;
unsigned bytes;
unsigned bits_used;
unsigned shift;
uint64_t mask;
unsigned be;
unsigned is_signed;
unsigned location;
static inline int iioutils_check_suffix(const char *str, const char *suffix)
return strlen(str) >= strlen(suffix) &&
suffix, strlen(suffix)) == 0;
int iioutils_break_up_name(const char *full_name, char **generic_name);
int iioutils_get_type(unsigned *is_signed, unsigned *bytes, unsigned *bits_used,
unsigned *shift, uint64_t *mask, unsigned *be,
const char *device_dir, const char *name,
const char *generic_name);
int iioutils_get_param_float(float *output, const char *param_name,
const char *device_dir, const char *name,
const char *generic_name);
void bsort_channel_array_by_index(struct iio_channel_info *ci_array, int cnt);
int build_channel_array(const char *device_dir,
struct iio_channel_info **ci_array, int *counter);
int find_type_by_name(const char *name, const char *type);
int write_sysfs_int(const char *filename, const char *basedir, int val);
int write_sysfs_int_and_verify(const char *filename, const char *basedir,
int val);
int write_sysfs_string_and_verify(const char *filename, const char *basedir,
const char *val);
int write_sysfs_string(const char *filename, const char *basedir,
const char *val);
int read_sysfs_posint(const char *filename, const char *basedir);
int read_sysfs_float(const char *filename, const char *basedir, float *val);
int read_sysfs_string(const char *filename, const char *basedir, char *str);
#endif /* _IIO_UTILS_H_ */