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

etsi_its_msgs_utils
include
etsi_its_msgs_utils
impl
asn1_primitives
asn1_primitives_getters.h
asn1_primitives_setters.h
cam
cam_access.h	Main CAM access implementation header
cam_getters.h	Getter functions for the ETSI ITS CAM (EN)
cam_getters_common.h	Common getter functions for the ETSI ITS CAM (EN and TS)
cam_setters.h	Setter functions for the ETSI ITS CAM (EN)
cam_setters_common.h	Common setter functions for the ETSI ITS CAM (EN and TS)
cam_ts_access.h	Main CAM TS access implementation header
cam_ts_getters.h	Getter functions for the ETSI ITS CAM (TS)
cam_ts_setters.h	Setter functions for the ETSI ITS CAM (TS)
cam_utils.h	Utility functions for the ETSI ITS CAM (EN and TS)
cdd
cdd_getters_common.h	Common getter functions for the ETSI ITS Common Data Dictionary (CDD) v1.3.1, v2.1.1 and v2.2.1
cdd_setters_common.h	Common setter functions for the ETSI ITS Common Data Dictionary (CDD) v1.3.1, v2.1.1 and v2.2.1
cdd_v1-3-1_getters.h	Getter functions for the ETSI ITS Common Data Dictionary (CDD) v1.3.1
cdd_v1-3-1_setters.h	Setter functions for the ETSI ITS Common Data Dictionary (CDD) v1.3.1
cdd_v2-1-1_getters.h	Getter functions for the ETSI ITS Common Data Dictionary (CDD) v2.1.1
cdd_v2-1-1_setters.h	Setter functions for the ETSI ITS Common Data Dictionary (CDD) v2.1.1
cdd_v2-2-1_getters.h	Getter functions for the ETSI ITS Common Data Dictionary (CDD) v2.2.1
cdd_v2-2-1_setters.h	Setter functions for the ETSI ITS Common Data Dictionary (CDD) v2.2.1
cpm
cpm_ts_access.h
cpm_ts_getters.h	Getter functions for the ETSI ITS CPM (TS)
cpm_ts_setters.h	Setter functions for the ETSI ITS CPM (TS)
cpm_ts_utils.h	Utility functions for the ETSI ITS CPM (TS)
denm
denm_access.h	Main DENM access implementation header
denm_getters.h	Getter functions for the ETSI ITS DENM (EN)
denm_getters_common.h	Common getter functions for the ETSI ITS DENM (EN and TS)
denm_setters.h	Setter functions for the ETSI ITS DENM (EN)
denm_setters_common.h	Common setter functions for the ETSI ITS DENM (EN and TS)
denm_ts_access.h	Main DENM TS access implementation header
denm_ts_getters.h	Getter functions for the ETSI ITS DENM (TS)
denm_ts_setters.h	Setter functions for the ETSI ITS DENM (TS)
denm_utils.h	Utility functions for the ETSI ITS DENM (EN and TS)
mapem
mapem_ts_access.h	Main MAPEM access implementation header
mapem_ts_getters.h	Getter functions for the ETSI ITS MAPEM
mapem_ts_setters.h	Setter functions for the ETSI ITS MAPEM
mapem_ts_utils.h	Utility functions for the ETSI ITS MAPEM
mcm
mcm_access.h	Main MCM access implementation header
mcm_getters.h	Getter functions for the UULM MCM (TR)
mcm_setters.h	Setter functions for the UULM MCM (TR)
mcm_utils.h	Utility functions for the ETSI ITS MCM (TR)
rtcmem
rtcmem_ts_access.h	Main RTCMEM access implementation header
rtcmem_ts_getters.h	Getter functions for the ETSI ITS RTCMEM
rtcmem_ts_setters.h	Setter functions for the ETSI ITS RTCMEM
rtcmem_ts_utils.h	Utility functions for the ETSI ITS RTCMEM
spatem
spatem_ts_access.h	Main SPATEM access implementation header
spatem_ts_getters.h	Getter functions for the ETSI ITS SPATEM
spatem_ts_setters.h	Setter functions for the ETSI ITS SPATEM
spatem_ts_utils.h	Utility functions for the ETSI ITS SPATEM
checks.h	Sanity-check functions etc
constants.h	File containing constants that are used in the context of ETIS ITS Messages
cam_access.hpp	Main CAM access header to include in ROS 2 projects
cam_ts_access.hpp	Main CAM access header to include in ROS 2 projects
cpm_ts_access.hpp	Main CPM access header to include in ROS 2 projects
denm_access.hpp	Main DENM access header to include in ROS 2 projects
denm_ts_access.hpp	Main DENM TS access header to include in ROS 2 projects
mapem_ts_access.hpp	Main MAPEM access header to include in ROS 2 projects
mcm_access.hpp	Main MCM access header to include in ROS 2 projects
rtcmem_ts_access.hpp	Main RTCMEM access header to include in ROS 2 projects
spatem_ts_access.hpp	Main SPATEM access header to include in ROS 2 projects