diff --git a/avr-gcc-toolchain.cmake b/avr-gcc-toolchain.cmake
new file mode 100644
index 0000000..be063e8
--- /dev/null
+++ b/avr-gcc-toolchain.cmake
@@ -0,0 +1,44 @@
+# ###############################
+# AVR-GCC toolchain file 
+# ###############################
+
+# Specify the cross-compiler
+set(CMAKE_SYSTEM_NAME Generic)
+set(CMAKE_SYSTEM_VERSION 1)
+set(CMAKE_SYSTEM_PROCESSOR avr)
+
+# Specify the compiler and linker
+set(AVR_MCU atmega328p) # The old Classic
+#set(AVR_MCU attiny85) # The older ATtiny series, avr25
+#set(AVR_MCU attiny404) # this is the avrxmega3 series
+#set(AVR_MCU avr64dd28) # Newer DX series, avrxmega2
+
+# The default frequency of an 328p devboard using the external crystal.
+#set(F_CPU 16000000)
+#set(F_CPU 8000000)
+add_compile_definitions(F_CPU=16000000UL)
+# add_compile_definitions(MCU=atmega328p)
+add_compile_definitions(__AVR_ATmega328P__)
+
+# Define the toolchain executables
+set(CMAKE_C_COMPILER avr-gcc)
+set(CMAKE_CXX_COMPILER avr-g++)
+set(CMAKE_ASM_COMPILER avr-gcc)
+set(CMAKE_LINKER avr-ld)
+set(CMAKE_OBJCOPY avr-objcopy)
+set(CMAKE_SIZE avr-size)
+
+
+# Define compile options
+#set(CMAKE_C_FLAGS_INIT "-mmcu=${AVR_MCU} -DF_CPU=16000000UL")
+#set(CMAKE_CXX_FLAGS_INIT "-mmcu=${AVR_MCU} -DF_CPU=16000000UL")
+#set(CMAKE_EXE_LINKER_FLAGS_INIT "-mmcu=${AVR_MCU}")
+set(CMAKE_C_FLAGS "-mmcu=${AVR_MCU} -DF_CPU=16000000UL")
+set(CMAKE_CXX_FLAGS "-mmcu=${AVR_MCU} -DF_CPU=16000000UL")
+set(CMAKE_EXE_LINKER_FLAGS_INIT "-mmcu=${AVR_MCU}")
+
+
+# Define the archiver and other tools
+set(CMAKE_AR avr-ar)
+set(CMAKE_RANLIB avr-ranlib)
+