Here are the classes, structs, unions and interfaces with brief descriptions:

Cch_api_funcs_t	API function pointer structure (internal use)
Cch_config_t	Combined configuration structure
Cch_dev_t	Chirp sensor device structure
Cch_group_t	Chirp sensor group configuration structure
Cch_i2c_info_t	I2C info structure
Cch_iq_sample_t	Sensor I/Q data value
Cch_thresh_t	Detection threshold value (CH201 only)
Cch_thresholds_t	Multiple detection threshold structure (CH201 only)
Cchdrv_i2c_queue	I2C queue structure, for non-blocking access
Cchdrv_i2c_transaction	I2C transaction control structure