Here is a list of all files with brief descriptions:

common/export/common/adc.hpp	Common definitions for ADC module
stm32/export/aux/adc.hpp	STM32 ADC driver
adc_cfg.in.hpp	Header provides template of ADC driver configuration
alloc.cpp	Allocator
arch.cpp
arm_eabi.cpp
assert.cpp
assert.h
aux_unit.cpp
bh1750.hpp	BH1750 Digital 16bit Serial Output Type Ambient Light Sensor IC See, https://e-radionica.com/productdata/BH1750FVI.pdf
dev/bus/export/dev/bus.hpp	Generic bus interface module
platform/common/export/common/bus.hpp	Platform bus common interface
bus_unit.cpp
adc_bat/case.cpp
bypass_console_bat/case.cpp
delay_bat/case.cpp	Delay test case
exti_manager_bat/case.cpp
gpio_bat/case.cpp
semaphore_test/case.cpp
streams_bat/case.cpp
systmr_bat/case.cpp
uart_bat/case.cpp
unity_demo/case.cpp
cm_device.hpp	Proxy header, required by architecture module due to CMSIS-compliancy
host/console.cpp	Console class implementation for the host platform
stm32/console.cpp	Platform console implementation
tm4c/console.cpp	TM4C bypass console implementation
common/export/common/console.hpp	Common bypas console implementation
host/export/platform/console.hpp
particle_electron/export/platform/console.hpp	Electron bypass console driver
stm32/export/platform/console.hpp	Stm32 console driver
tm4c/export/platform/console.hpp	TM4C bypass console driver
console_driver.hpp
console_integrity.cpp
console_pipe.hpp	Console pipe module
cs43l22.hpp	Contains implementation for CS43L22 driver
cs43l22_cfg.in.hpp	CS43L22 configuration code template
debug_stubs.cpp	Provides debug stubs required by TivaWare library
host/templates/defines.in.hpp	Platform definitions template
particle_electron/templates/defines.in.hpp	Platform definitions template
stm32/family/templates/defines.in.hpp	Family-related defintions that should be exported
stm32/templates/defines.in.hpp	Platform definitions template
tm4c/templates/defines.in.hpp	TM4C platform definitions template
dir.cpp
dir.hpp	FATFS dir descriptor interface
dir_descriptor.cpp
dir_descriptor.hpp	Dir descriptor interface
dir_inode.cpp	Directory FATFS inode implementation
dir_inode.hpp	Directory FATFS inode interface
dma_cfg.in.hpp	Header provides template of DMA driver configuration
endian.hpp
err.cpp
err.hpp
execution.cpp
arch/arm_cm/export/arch/execution.hpp	Various routines for CM* architectures, altering execution flow
platform/common/export/common/execution.hpp	Module aggregates routines that are control execution flow of the MCU
platform/host/export/platform/execution.hpp	Module aggregates routines that are control execution flow on the host platform
platform/particle_electron/export/platform/execution.hpp	Various routines for particle electron platform, altering execution flow
platform/stm32/export/platform/execution.hpp	Module aggregates routines that are control execution flow of the MCU
platform/tm4c/export/platform/execution.hpp	Execution control for TM4C platform
stm32/exti_manager.cpp	EXTI manager implementation for STM32 platform
tm4c/exti_manager.cpp	External interrupt manager implementation
stm32/export/platform/exti_manager.hpp	External interrupt manager for STM32 platform
tm4c/export/platform/exti_manager.hpp	External interrupt manager for TM4C platform
fc28.hpp	FC-28 Soil Humidity/Moisture Detection Sensor Module
fc28_unit.cpp
file.cpp	FAT file descriptor implementation
file.hpp	FAT file descriptor interface
file_descriptor.cpp	File descriptor implementation
file_descriptor.hpp	File descriptor interface
file_inode.cpp	File FATFS inode implementation
file_inode.hpp	File FATFS inode interface
Findcppcheck.cpp	Dummy C++ source file used by CMake module Findcppcheck.cmake
export/ecl/fs/fs.hpp	VFS interface
fat/export/ecl/fat/fs.hpp
fs_cfg.in.hpp	Filesystem configuration code template
fs_defines.in.h	Filesystem definitions template This file is intentionally made as C-header, to be able to include it in FATFS, written in C
fs_descriptor.hpp	Filesystem descriptor
fs_unit.cpp
dev/export/dev/generated.hpp	TheCore device generated files
lib/export/lib/generated.hpp	TheCore library generated files
platform/particle_electron/export/aux/generated.hpp	Enlists all generated headers by Particle platform
platform/stm32/export/aux/generated.hpp	Enlists all generated headers by stm32 platform
platform/tm4c/export/aux/generated.hpp	Enlists all generated headers by tm4c platform
generated.in.hpp	Generated definitions template
gpio.hpp	Common GPIO definitions for all platforms
stm32/templates/gpio_cfg.in.hpp	Header provides template of GPIO driver configuration
tm4c/templates/gpio_cfg.in.hpp	TM4C GPIO configuration template
stm32/export/platform/gpio_device.hpp	GPIO device interface for STM32 platform
tm4c/export/platform/gpio_device.hpp	TM4C GPIO device
hm10.hpp	HM-10 BT module drivers
hm10_cfg.in.hpp	HTU21D configuration code template
hm10_unit.cpp
htu21d.hpp	Driver for HTU21D digital humidity sensor with temperature output See, https://cdn-shop.adafruit.com/datasheets/1899_HTU21D.pdf
htu21d_cfg.in.hpp	HTU21D configuration code template
i2c.hpp
particle_electron/export/aux/i2c_bus.hpp	Electron I2C driver
stm32/export/aux/i2c_bus.hpp
i2c_cfg.in.hpp	Header provides template of I2C driver configuration
i2c_wire_cfgs.in.hpp	Particle Serial I2C driver configuration template
i2c_wire_dispatcher.in.cpp	I2C event dispatcher
inode.cpp
inode.hpp	Inode interface
iostream.hpp
irq.cpp	Common IRQ implementation
common/export/common/irq.hpp	IRQ common module
particle_electron/export/platform/irq.hpp	Electron IRQ interface
stm32/export/platform/irq.hpp	STM32 IRQ interface
tm4c/export/platform/irq.hpp	TM4C IRQ interface
irq.in.cpp	TM4C IRQ handlers template
istream.hpp
istream_unit.cpp
kernel_main.c	FreeRTOS main module
kernel_stubs.c	Collection of kernel stubs
list.hpp	The intrusive list interface
list_unit.cpp
memory.hpp	Memory managment helpers: shared pointer
mmio.hpp	Memory mapped I/O abstractions
mmio_unit.cpp	Memory mapped I/O abstractions unit test
dev/bus/tests/mocks/mutex.cpp
lib/thread/freertos/mutex.cpp
lib/thread/no_os/mutex.cpp
lib/thread/posix/mutex.cpp
freertos/export/ecl/thread/mutex.hpp
no_os/export/ecl/thread/mutex.hpp	Mutex implementation for projects without OS support
posix/export/ecl/thread/mutex.hpp
ostream.hpp
ostream_unit.cpp
path.hpp	Filesystem path utilities
pcd8544.hpp
pin_cfg.hpp	Pin configuration helpers
stm32/templates/pin_mux.in.cpp	Pin multiplexer configurator
tm4c/templates/pin_mux.in.cpp	Pin multiplexer and configurator for TM4C platform
particle_electron/platform.cpp
stm32/platform.cpp	STM32 platform main file
tm4c/platform.cpp
pool.hpp	Memory pool and corresponding allocator facilities
pool_base_unit.cpp
pool_main.cpp
pool_unit.cpp
sdspi.hpp	SDSPI driver module
sdspi_cfg.in.hpp	SDSPI configuration code template
freertos/semaphore.cpp
no_os/semaphore.cpp	Implementation of the semaphore for targets without OS support
posix/semaphore.cpp
freertos/export/ecl/thread/semaphore.hpp
no_os/export/ecl/thread/semaphore.hpp	Semaphore implementation for projects without OS support
posix/export/ecl/thread/semaphore.hpp
semaphore_unit.cpp
serial.hpp	Serial interface for platform drivers with listen mode support
serial_cfgs.in.hpp	Particle Serial drivers configuration template
serial_dispatcher.in.cpp	Particle Serial dispatcher template
serial_unit.cpp
shared_unit.cpp
signal.cpp
signal.hpp
common/export/common/spi.hpp
skel/export/aux/spi.hpp	Contains platform driver skeleton for SPI bus
tm4c/export/aux/spi.hpp	Contains platform driver for TM4 SPI bus
skel/templates/spi_cfg.in.hpp	Header provides template of SPI and spi drivers configuration
tm4c/templates/spi_cfg.in.hpp	Header provides template of SPI and spi drivers configuration
spi_i2s_bus.hpp	Contains platform driver implementation for SPI and I2S buses
spi_i2s_cfg.in.hpp	Header provides template of SPI and I2S drivers configuration
spinlock.cpp
spinlock.hpp	Simple spinlock
f4xx/export/stm32_device.h	STM32F4 collection of C-headers
l1xx/export/stm32_device.h	STM32 C header collection
f4xx/export/stm32_device.hpp	STM32F4 collection of C++ headers
l1xx/export/stm32_device.hpp	STM32 C++ header collection
stm32_dma_wrap_interface.hpp	DMA wrapper interface for STM32 platform
stm32_exti_wrap_interface.hpp	Interface to EXTI STM32 wrappers
stm32_memmap.hpp	Memmap for stm32f4 device
stm32f4xx_adc_wrap.hpp	STM32F4XX ADC wrappers
stm32f4xx_dma_wrap.hpp	STM32F4XX DMA wrappers implementation
stm32f4xx_exti_wrap.hpp	EXTI wrapper implementation
stm32l1xx_dma_wrap.hpp	STM32L1XX DMA wrappers implementation
stm32l1xx_exti_wrap.hpp	EXTI wrapper implementation
streams.cpp	Main iostream module
stubs.cpp	Newlib stubs implementation
host/suites/platform_bat/suite_init.cpp
host/suites/unity_demo/suite_init.cpp
particle_electron/suites/platform_bat/suite_init.cpp
particle_electron/suites/unity_demo/suite_init.cpp
stm32f4discovery_rtos/suites/concurrency_suite/suite_init.cpp
stm32f4discovery_simple/suites/platform_bat/suite_init.cpp
stm32f4discovery_simple/suites/unity_demo/suite_init.cpp
tivac_tm4/suites/platform_bat/suite_init.cpp	Suite initialization of the TI TIVAC (TM4C) platform BAT suite
tivac_tm4/suites/unity_demo/suite_init.cpp
sys.cpp	TheCore system initialization module
test_adc.hpp	Suite ADC definitions
stm32f4discovery_simple/suites/platform_bat/export/test_gpio.hpp	List of GPIOs exported by target, used by the test case
tivac_tm4/suites/platform_bat/export/test_gpio.hpp	List of GPIOs exported by target, used by the test case
particle_electron/suites/platform_bat/export/test_uart.hpp	Test UART for uart_case test
stm32f4discovery_simple/suites/platform_bat/export/test_uart.hpp	Test UART for uart_case test
tivac_tm4/suites/platform_bat/export/test_uart.hpp	Test UART for platform BAT test
freertos/thread.cpp
posix/thread.cpp
freertos/export/ecl/thread/thread.hpp
posix/export/ecl/thread/thread.hpp
thread_unit.cpp
types.h	Common types for theCore framework
export/ecl/fs/types.hpp	Filesystem type utilities
fat/export/ecl/fat/types.hpp	FATFS convinient aliases
uart.hpp	UART implementation for TI TM4C MCU
uart_bus.hpp	Electron UART driver
stm32/templates/uart_cfg.in.hpp	Header provides template of u(s)art driver configuration
tm4c/templates/uart_cfg.in.hpp	TM4C UART definitions template
unity_helpers.hpp	Set of unity helpers
unity_stubs.cpp	Stubs implementation for Unity functions
usart_bus.hpp	STM32 USART driver
user_side.cpp	User-side code that should be compiled directly into resulting application
utils.cpp
thread/freertos/export/ecl/thread/utils.hpp
thread/no_os/export/ecl/thread/utils.hpp	Utilities for projects without OS support
utils/export/ecl/utils.hpp	General the Core utilities library
utils_unit.cpp
version.hpp	General the Core version library
version.in.cpp