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 * @mask: a bit mask for the raw output 32 * @is_signed: is the raw value stored signed 33 * @enabled: is this channel enabled 34 **/ 35 struct iio_channel_info { 36 char *name; 37 char *generic_name; 38 float scale; 39 float offset; 40 unsigned index; 41 unsigned bytes; 42 unsigned bits_used; 43 unsigned shift; 44 uint64_t mask; 45 unsigned be; 46 unsigned is_signed; 47 unsigned location; 48 }; 49 50 int iioutils_break_up_name(const char *full_name, char **generic_name); 51 int iioutils_get_type(unsigned *is_signed, unsigned *bytes, 52 unsigned *bits_used, unsigned *shift, 53 uint64_t *mask, unsigned *be, 54 const char *device_dir, const char *name, 55 const char *generic_name); 56 int iioutils_get_param_float(float *output, const char *param_name, 57 const char *device_dir, const char *name, 58 const char *generic_name); 59 void bsort_channel_array_by_index(struct iio_channel_info **ci_array, int cnt); 60 int build_channel_array(const char *device_dir, 61 struct iio_channel_info **ci_array, int *counter); 62 int find_type_by_name(const char *name, const char *type); 63 int write_sysfs_int(char *filename, char *basedir, int val); 64 int write_sysfs_int_and_verify(char *filename, char *basedir, int val); 65 int write_sysfs_string_and_verify(char *filename, char *basedir, char *val); 66 int write_sysfs_string(char *filename, char *basedir, char *val); 67 int read_sysfs_posint(char *filename, char *basedir); 68 int read_sysfs_float(char *filename, char *basedir, float *val); 69 int read_sysfs_string(const char *filename, const char *basedir, char *str); 70 71 #endif /* _IIO_UTILS_H_ */ 72