1 #ifndef _IIO_UTILS_H_ 2 #define _IIO_UTILS_H_ 3 4 /* IIO - useful set of util functionality 5 * 6 * Copyright (c) 2008 Jonathan Cameron 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms of the GNU General Public License version 2 as published by 10 * the Free Software Foundation. 11 */ 12 13 #include <stdint.h> 14 15 /* Made up value to limit allocation sizes */ 16 #define IIO_MAX_NAME_LENGTH 30 17 18 #define FORMAT_SCAN_ELEMENTS_DIR "%s/scan_elements" 19 #define FORMAT_TYPE_FILE "%s_type" 20 21 extern const char *iio_dir; 22 23 /** 24 * struct iio_channel_info - information about a given channel 25 * @name: channel name 26 * @generic_name: general name for channel type 27 * @scale: scale factor to be applied for conversion to si units 28 * @offset: offset to be applied for conversion to si units 29 * @index: the channel index in the buffer output 30 * @bytes: number of bytes occupied in buffer output 31 * @bits_used: number of valid bits of data 32 * @shift: amount of bits to shift right data before applying bit mask 33 * @mask: a bit mask for the raw output 34 * @be: flag if data is big endian 35 * @is_signed: is the raw value stored signed 36 * @location: data offset for this channel inside the buffer (in bytes) 37 **/ 38 struct iio_channel_info { 39 char *name; 40 char *generic_name; 41 float scale; 42 float offset; 43 unsigned index; 44 unsigned bytes; 45 unsigned bits_used; 46 unsigned shift; 47 uint64_t mask; 48 unsigned be; 49 unsigned is_signed; 50 unsigned location; 51 }; 52 53 int iioutils_break_up_name(const char *full_name, char **generic_name); 54 int iioutils_get_type(unsigned *is_signed, unsigned *bytes, 55 unsigned *bits_used, unsigned *shift, 56 uint64_t *mask, unsigned *be, 57 const char *device_dir, const char *name, 58 const char *generic_name); 59 int iioutils_get_param_float(float *output, const char *param_name, 60 const char *device_dir, const char *name, 61 const char *generic_name); 62 void bsort_channel_array_by_index(struct iio_channel_info **ci_array, int cnt); 63 int build_channel_array(const char *device_dir, 64 struct iio_channel_info **ci_array, int *counter); 65 int find_type_by_name(const char *name, const char *type); 66 int write_sysfs_int(const char *filename, const char *basedir, int val); 67 int write_sysfs_int_and_verify(const char *filename, const char *basedir, 68 int val); 69 int write_sysfs_string_and_verify(const char *filename, const char *basedir, 70 const char *val); 71 int write_sysfs_string(const char *filename, const char *basedir, 72 const char *val); 73 int read_sysfs_posint(const char *filename, const char *basedir); 74 int read_sysfs_float(const char *filename, const char *basedir, float *val); 75 int read_sysfs_string(const char *filename, const char *basedir, char *str); 76 77 #endif /* _IIO_UTILS_H_ */ 78