[core] Update PIO builders to new structure

builder/frameworks/base.py

@@ -0,0 +1,84 @@
+# Copyright (c) Kuba Szczodrzyński 2023-02-26.
+
+from os.path import join
+
+import click
+from ltchiptool import Family
+from platformio.platform.base import PlatformBase
+from platformio.platform.board import PlatformBoardConfig
+from SCons.Errors import UserError
+from SCons.Script import DefaultEnvironment, Environment
+
+env: Environment = DefaultEnvironment()
+board: PlatformBoardConfig = env.BoardConfig()
+platform: PlatformBase = env.PioPlatform()
+
+# Environment variables, include paths, etc.
+env.ConfigureEnvironment(platform, board)
+family: Family = env["FAMILY_OBJ"]
+
+# Flash layout defines
+env.AddFlashLayout(board)
+
+# Configure each family first (add CPP defines, prepend fixups' paths)
+for f in family.inheritance:
+    path = env.AddFamily(f)
+    env.AddCoreConfig(name=f.code, path=join(path, "base"))
+    if "ARDUINO" in env:
+        env.AddCoreConfig(name=f"{f.code}_arduino", path=join(path, "arduino", "src"))
+
+# Include SDK builder scripts
+# The script will call BuildLibraries(safe=True) to secure the include paths
+found = False
+for f in family.inheritance:
+    try:
+        env.SConscript(f"../family/{f.name}.py", must_exist=True)
+        found = True
+    except UserError:
+        pass
+
+# Fail if no SDK builder was found
+if not found:
+    click.secho(
+        f"Platform '{family.name}' is currently not supported - "
+        "no SDK builder script could be found.",
+        fg="red",
+    )
+    exit(1)
+
+# Add common sources among all families
+env.AddCoreSources(
+    name="common",
+    path=join("$COMMON_DIR", "base"),
+)
+# Add sources for this family and each parent
+for f in family.inheritance:
+    path = join("$CORES_DIR", f.name, "base")
+    env.AddCoreSources(name=f.code, path=path)
+
+# Sources - external libraries
+env.AddExternalLibrary("ltchiptool")  # uf2ota source code
+env.AddExternalLibrary("flashdb")
+env.AddExternalLibrary("printf")
+
+# Flags & linker options
+env.Append(
+    CPPDEFINES=[
+        ("LIBRETUYA", 1),
+        ("LT_VERSION", env.ReadLTVersion(platform.get_dir(), platform.version)),
+        ("LT_BOARD", "${VARIANT}"),
+        ("F_CPU", board.get("build.f_cpu")),
+        ("MCU", "${MCU}"),
+        ("FAMILY", "F_${FAMILY}"),
+    ],
+    LINKFLAGS=[
+        '"-Wl,-Map=' + join("$BUILD_DIR", "${PROGNAME}.map") + '"',
+    ],
+    LIBS=[
+        "stdc++",
+        "supc++",
+    ],
+)
+
+# Build everything from the base core
+env.BuildLibraries()