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

[detail level 1234]

include
bios
eeprom.h	EEPROM Driver
gwa_core_io.h	GWA Core IO Functions
gwa_delay.h	GWA delay functions
gwa_display.h	GWA Display functions
gwa_ident.h	Functions to access board identification information
gwa_indicators.h	CiA 303-3 LED Indicators driver
gwa_macros.h	Implementation of useful macros used across the gwa code
gwa_reset.h	Reset utilities
gwa_reset_map.h	Reset addresses
drv
board.h	Board definitions
gpio.h	The GPIO driver
gwa_adc.h	ADC Driver
gwa_bsp_cfg.h	GWA BSP Cconfiguration options
gwa_dac.h	GWA external DAC driver functions
gwa_encoder.h	Encoder function prototypes
gwa_i2c.h	I2C Driver
rtc.h	RTC driver
spi.h	SPI Peripheral Driver
modbus
modbus_core
modbus.h	Modbus interface to the application
modbus_exceptions.h	Modbus exceptions
modbus_rtos.h	Modbus interface to an RTOS
modbus_types.h	Modbus types
modbus_serial
modbus_serial.h	Modbus serial defnitions and functions
modbus_tcp
modbus_tcp.h	Modbus/TCP common function definitions
modbus_tcp_master.h	Modbus/TCP master function definitions
modbus_tcp_master_platform.h	Modbus/TCP platform-dependent function prototypes
modbus_tcp_master_utils.h	Modbus/TCP master common utility functions
modbus_tcp_platform.h	Modbus/TCP platform-dependent function prototypes
modbus_tcp_slave.h	Modbus/TCP slave function definitions
modbus_tcp_slave_platform.h	Modbus/TCP platform-dependent function prototypes
modbus_tcp_slave_utils.h	Modbus/TCP slave common utility functions
modbus_tcp_utils_azure_rtos.h	Modbus/TCP utility function for Azure RTOS
modbus_tcp_utils_keil.h	Modbus/TCP utility function for Keil MDK-ARM
phy
nx_phy_dp83848.h
nx_phy_driver.h	Macros and type definitions for GaIA PHY Driver for NetXDuo
nx_phy_ksz8863.h
nx_phy_utils.h	GaIA PHY NetXDuo utility functions prototypes
serial
buffered_serial.h	Buffered access to serial communication ports
serial.h	Serial Driver
tasks
io_task.h	IO thread function prototypes for CMSIS-OS
io_task_azure_rtos.h	IO thread function prototypes for Azure RTOS ThreadX
io_task_v2.h	IO thread function prototypes for CMSIS-OS 2
mb_slave_task.h	Modbus slave thread function prototypes for CMSIS-OS
mb_slave_task_azure_rtos.h	Modbus slave thread function prototypes for Azure RTOS
mb_slave_task_v2.h	Modbus slave thread function prototypes for CMSIS-OS 2