1 /** 2 * @brief Provides helpful file IO wrappers for use with sysfs. 3 * @details Based on Jonathan Cameron's @e iio_utils.h. 4 */ 5 6 #ifndef _INV_SYSFS_UTILS_H_ 7 #define _INV_SYSFS_UTILS_H_ 8 9 /** 10 * struct inv_sysfs_names_s - Files needed by user applications. 11 * @buffer: Ring buffer attached to FIFO. 12 * @enable: Turns on HW-to-ring buffer flow. 13 * @raw_data: Raw data from registers. 14 * @temperature: Temperature data from register. 15 * @fifo_rate: FIFO rate/ODR. 16 * @power_state: Power state (this is a five-star comment). 17 * @fsr: Full-scale range. 18 * @lpf: Digital low pass filter. 19 * @scale: LSBs / dps (or LSBs / Gs). 20 * @temp_scale: LSBs / degrees C. 21 * @temp_offset: Offset in LSBs. 22 */ 23 struct inv_sysfs_names_s { 24 25 //Sysfs for ITG3500 & MPU6050 26 const char *buffer; 27 const char *enable; 28 const char *raw_data; //Raw Gyro data 29 const char *temperature; 30 const char *fifo_rate; 31 const char *power_state; 32 const char *fsr; 33 const char *lpf; 34 const char *scale; //Gyro scale 35 const char *temp_scale; 36 const char *temp_offset; 37 const char *self_test; 38 //Starting Sysfs available for MPU6050 only 39 const char *accel_en; 40 const char *accel_fifo_en; 41 const char *accel_fs; 42 const char *clock_source; 43 const char *early_suspend_en; 44 const char *firmware_loaded; 45 const char *gyro_en; 46 const char *gyro_fifo_en; 47 const char *key; 48 const char *raw_accel; 49 const char *reg_dump; 50 const char *tap_on; 51 const char *dmp_firmware; 52 }; 53 54 /* File IO. Typically won't be called directly by user application, but they'll 55 * be here for your enjoyment. 56 */ 57 int inv_sysfs_write(char *filename, long data); 58 int inv_sysfs_read(char *filename, long num_bytes, char *data); 59 60 /* Helper APIs to extract specific data. */ 61 int inv_read_buffer(int fd, long *data, long long *timestamp); 62 int inv_read_raw(const struct inv_sysfs_names_s *names, long *data, 63 long long *timestamp); 64 int inv_read_temperature_raw(const struct inv_sysfs_names_s *names, short *data, 65 long long *timestamp); 66 int inv_read_fifo_rate(const struct inv_sysfs_names_s *names, short *data); 67 int inv_read_power_state(const struct inv_sysfs_names_s *names, char *data); 68 int inv_read_scale(const struct inv_sysfs_names_s *names, float *data); 69 int inv_read_temp_scale(const struct inv_sysfs_names_s *names, short *data); 70 int inv_read_temp_offset(const struct inv_sysfs_names_s *names, short *data); 71 int inv_write_fifo_rate(const struct inv_sysfs_names_s *names, short data); 72 int inv_write_buffer_enable(const struct inv_sysfs_names_s *names, char data); 73 int inv_write_power_state(const struct inv_sysfs_names_s *names, char data); 74 75 /* Scaled data. */ 76 int inv_read_q16(const struct inv_sysfs_names_s *names, long *data, 77 long long *timestamp); 78 int inv_read_temp_q16(const struct inv_sysfs_names_s *names, long *data, 79 long long *timestamp); 80 81 82 #endif /* #ifndef _INV_SYSFS_UTILS_H_ */ 83 84 85
