438fca0ace
- Fully open toolchain: arm-none-eabi-gcc inside Podman/Docker container - Platform-agnostic build via justfile (auto-detects podman vs docker) - CMake + Ninja build system with arm-none-eabi toolchain file - nRF52840 linker script and startup with full 64-entry vector table - Register access via typed bitfield unions (include/regs.h) - FHSS channel sequencer: AES-128-ECB PRNG over 40 channels (2402-2480 MHz) - Low-power sleep via SYSTEM_ON WFI + GPIOTE wakeup on button press - Vendor deps as shallow git submodules: nrfx, CMSIS_5, tiny-AES-c
72 lines
1.5 KiB
CMake
72 lines
1.5 KiB
CMake
cmake_minimum_required(VERSION 3.22)
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# must be set before project()
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set(CMAKE_TOOLCHAIN_FILE "${CMAKE_SOURCE_DIR}/cmake/arm-none-eabi.cmake")
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project(ptt_fhss C ASM)
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set(CMAKE_C_STANDARD 11)
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set(CMAKE_C_STANDARD_REQUIRED ON)
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# sources
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add_executable(firmware
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src/startup.c
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src/main.c
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src/radio.c
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src/fhss.c
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src/power.c
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vendor/tiny-aes-c/aes.c
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)
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# include paths
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target_include_directories(firmware PRIVATE
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include
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vendor/nrfx/mdk # nRF52840 device headers (nrf52840.h etc.)
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vendor/CMSIS_5/CMSIS/Core/Include # core_cm4.h, cmsis_gcc.h etc.
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vendor/tiny-aes-c
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)
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# preprocessor defines
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target_compile_definitions(firmware PRIVATE
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NRF52840_XXAA # device variant required by nrfx/mdk headers
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)
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# compiler flags
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set(CPU_FLAGS
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-mcpu=cortex-m4
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-mthumb
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-mfpu=fpv4-sp-d16
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-mfloat-abi=hard
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)
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target_compile_options(firmware PRIVATE
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${CPU_FLAGS}
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-Os
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-ffunction-sections
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-fdata-sections
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-fno-exceptions
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-Wall
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-Wextra
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-Werror
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)
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# linker
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target_link_options(firmware PRIVATE
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${CPU_FLAGS}
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-T ${CMAKE_SOURCE_DIR}/link/nrf52840.ld
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-Wl,--gc-sections
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-Wl,--print-memory-usage
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-nostartfiles
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-specs=nano.specs
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-specs=nosys.specs
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)
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# post-build: .hex + size report
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add_custom_command(TARGET firmware POST_BUILD
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COMMAND arm-none-eabi-objcopy
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-O ihex $<TARGET_FILE:firmware>
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${CMAKE_BINARY_DIR}/firmware.hex
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COMMAND arm-none-eabi-size $<TARGET_FILE:firmware>
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VERBATIM
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)
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