Here is a list of all documented files with brief descriptions:

csi_api.h	Common serial interface (CSI) API
csi_bus.c	Implementation of hardware independent serial driver for CSI
csi_bus.h	Hardware independent serial driver for CSI control
csi_common.c	Implementation of common serial port functions
csi_const.h	Global constants, defines and data types for CSI
csi_crc.c	CRC calculation for Common Serial Interface protocol
csi_crc.h	CRC calculation for Common Serial Interface (CSI) protocol
csi_dev.c	Application programming interface for CSI
csi_dev.h	Common Serial Interface API
csi_err.c	Application programming interface for CSI
csi_err.h	CSI specififc error codes
csi_hwserial.h	Hardware dependent serial driver interface
csi_timer.c	Timer implementation form timeouts and time measuring
csi_timer.h	Timer implementation for timeouts and time measuring
csi_types.h	CSI private data types
err_codes.c	Common error codes and conversion into error strings
err_codes.h	Common error code definitions for error handling
ErrStringTable.h	Declaration of private error message table This is no public include file, so do not include it directly into your application. This is a private include file that provides a string message table
nem4_rs232_api.c	Application programming interface for control of Nemesys via RS232
nem4_rs232_api.h	Application Programming Interface (API)
nem_rs232_api.c	Application programming interface for control of neMESYS via RS232
nem_rs232_api.h	Application Programming Interface (API)