Create BUILD.bazel

Author: dhairs

VCU/firmware/BUILD.bazel

@@ -0,0 +1,98 @@
+load("@rules_cc//cc:defs.bzl", "cc_binary")
+
+filegroup(
+    name = "linker_script",
+    srcs = ["stm32g474vetx_flash.ld"],
+)
+
+filegroup(
+    name = "startup_file",
+    srcs = ["startup_stm32g474xx.s"],
+)
+
+cc_binary(
+    name = "vcu_firmware_2026",
+    srcs = glob(
+        [
+            "Core/Src/**/*.c",
+            "Drivers/*HAL_Driver/**/*.c",
+            "Middlewares/**/*.c",
+            "USB_DEVICE/**/*.c",
+            "Core/Inc/**/*.h",
+            "Drivers/**/*.h",
+            "Middlewares/**/*.h",
+            "USB_DEVICE/**/*.h",
+        ],
+
+        allow_empty = True # allows empty globs, so the codebase can grow without refactoring
+    ),
+
+    includes = [
+        "Core/Inc",
+        "Drivers/STM32G4xx_HAL_Driver/Inc",
+        "Drivers/STM32G4xx_HAL_Driver/Inc/Legacy",
+        "Drivers/CMSIS/Device/ST/STM32G4xx/Include",
+        "Drivers/CMSIS/Include",
+        "USB_DEVICE/App",
+        "USB_DEVICE/Target",
+        "Middlewares/ST/STM32_USB_Device_Library/Core/Inc",
+        "Middlewares/ST/STM32_USB_Device_Library/Class/CDC/Inc",
+        "//longhorn-lib:longhorn_lib"
+    ],
+
+    # Compiler options
+    copts = [
+        "-mcpu=cortex-m4",
+        "-mthumb",
+        "-mthumb-interwork",
+        "-ffunction-sections",
+        "-fdata-sections",
+    ],
+
+    # Linker options
+    linkopts = [
+        "-T $(location :linker_script)",
+        "$(location :startup_file)",
+        "-Wl,-Map=output.map",
+        "-Wl,--gc-sections",
+        "-Wl,--no-warn-rwx-segments",
+    ],
+
+    # Defines for the C preprocessor
+    defines = [
+        "DEBUG",
+        "USE_HAL_DRIVER",
+        "STM32G474xx",
+    ],
+
+    additional_linker_inputs = [
+        ":linker_script",
+        ":startup_file",
+    ],
+
+    # Target platform constraints
+    target_compatible_with = [
+        "@platforms//cpu:arm",
+        "@platforms//os:none",
+    ],
+
+    visibility = ["//visibility:public"],
+)
+
+genrule(
+    name = "bin",
+    srcs = [":vcu_firmware_2026"],
+    outs = ["vcu_firmware_2026.bin"],
+    cmd = "$(execpath @arm_none_eabi//:objcopy) -O binary $< $@",
+    cmd_bat = "copy \"$(location @arm_none_eabi//:objcopy)\" objcopy.exe && objcopy.exe -O binary $< $@",
+    tools = ["@arm_none_eabi//:objcopy"],
+)
+
+genrule(
+    name = "hex",
+    srcs = [":vcu_firmware_2026"],
+    outs = ["vcu_firmware_2026.hex"],
+    cmd = "$(execpath @arm_none_eabi//:objcopy) -O ihex $< $@",
+    cmd_bat = "copy \"$(location @arm_none_eabi//:objcopy)\" objcopy.exe && objcopy.exe -O ihex $< $@",
+    tools = ["@arm_none_eabi//:objcopy"],
+)