joystick

Joystick MMIO Demo

This demo reads the joystick on the STM32C0116-DK and flashes the LED at different rates depending on what direction is depressed on the joystick.

Joystick	Blink Rate
Select	Solid ON
Up	25ms ON/OFF
Right	50ms ON/OFF
Down	75ms ON/OFF
Left	100ms ON/OFF
None	Solid OFF

It should be noted that the Up direction on the STM32C0116-DK is towards the MCU on the board and towards the USB connector. Also, Select is when the joystick is pressed down in the middle.

Building

Run the make command in this directory to create a release build:

$ make
compiling (please be patient, this may take a few minutes)...
swift build \
        --configuration release \
        --swift-sdks-path ../swift-sdks \
        --swift-sdk stm32c0xx \

[1/1] Planning build
Building for production...
[3/3] Write swift-version--71903000615C161C.txt
Build complete! (3.92s)
linking...
arm-none-eabi-gcc ./.build/release/libApplication.a -o ./.build/release/joystick.elf \
        -mcpu=cortex-m0plus -mthumb -mfloat-abi=soft \
        -ffreestanding -fdata-sections -ffunction-sections -fno-builtin -fno-common -fshort-enums -std=gnu11 \
        --specs=nano.specs --specs=nosys.specs \
        -Wl,--gc-sections \
        -T./Sources/Support/STM32C011F6.ld
Extracting lst file...
arm-none-eabi-objdump -S .build/release/joystick.elf | swift demangle > ./.build/release/joystick.lst
arm-none-eabi-objdump: Warning: Unrecognized form: 0x23
arm-none-eabi-objdump: DWARF error: invalid or unhandled FORM value: 0x23
Extracting map file...
arm-none-eabi-objdump -t .build/release/joystick.elf | swift demangle > ./.build/release/joystick.map
arm-none-eabi-objdump: Warning: Unrecognized form: 0x23
Extracting & printing sizes...
arm-none-eabi-size .build/release/joystick.elf -G > ./.build/release/joystick.size
      text       data        bss      total filename
      1300        264          0       1564 .build/release/joystick.elf
Extracting bin file...
arm-none-eabi-objcopy -O binary .build/release/joystick.elf ./.build/release/joystick.bin
-rwxrwxr-x 1 xtremek xtremek 1.6K Nov  1 09:06 ./.build/release/joystick.bin

If running with a Swift 6.1 nightly toolchain or in the devcontainer, you can create a debug build with make CONFIGURATION=debug, and the binary will be found at .build/debug/joystick.bin.

Flashing

See the main README.md for instructions on flashing.