Support for esp8684 (esp32-c2)

boards/esp8684-devkitm-1.json

@@ -0,0 +1,29 @@
+{
+  "build": {
+    "core": "esp32",
+    "f_cpu": "120000000L",
+    "f_flash": "60000000L",
+    "flash_mode": "qio",
+    "mcu": "esp32c2",
+    "variant": "esp32c2"
+  },
+  "connectivity": [
+    "wifi"
+  ],
+  "debug": {
+    "openocd_target": "esp32c2.cfg"
+  },
+  "frameworks": [
+    "espidf"
+  ],
+  "name": "Espressif ESP8684-DevKitM-1 4MB",
+  "upload": {
+    "flash_size": "4MB",
+    "maximum_ram_size": 278528,
+    "maximum_size": 4194304,
+    "require_upload_port": true,
+    "speed": 460800
+  },
+  "url": "https://docs.espressif.com/projects/espressif-esp-dev-kits/en/latest/esp8684/esp8684-devkitm-1/user_guide.html",
+  "vendor": "Espressif"
+}

builder/frameworks/_embed_files.py

@@ -110,14 +110,14 @@ def transform_to_asm(target, source, env):
                 " ".join(
                     [
                         "riscv32-esp-elf-objcopy"
-                        if mcu in ("esp32c3", "esp32c6")
+                        if mcu in ("esp32c2", "esp32c3", "esp32c6")
                         else "xtensa-%s-elf-objcopy" % mcu,
                         "--input-target",
                         "binary",
                         "--output-target",
-                        "elf32-littleriscv" if mcu in ("esp32c3","esp32c6") else "elf32-xtensa-le",
+                        "elf32-littleriscv" if mcu in ("esp32c2", "esp32c3","esp32c6") else "elf32-xtensa-le",
                         "--binary-architecture",
-                        "riscv" if mcu in ("esp32c3","esp32c6") else "xtensa",
+                        "riscv" if mcu in ("esp32c2", "esp32c3","esp32c6") else "xtensa",
                         "--rename-section",
                         ".data=.rodata.embedded",
                         "$SOURCE",

builder/frameworks/espidf.py

@@ -63,7 +63,7 @@
 IDF_ENV_VERSION = "1.0.0"
 FRAMEWORK_DIR = platform.get_package_dir("framework-espidf")
 TOOLCHAIN_DIR = platform.get_package_dir(
-    "toolchain-%s" % ("riscv32-esp" if mcu in ("esp32c3", "esp32c6") else ("xtensa-%s" % mcu))
+    "toolchain-%s" % ("riscv32-esp" if mcu in ("esp32c2", "esp32c3", "esp32c6") else ("xtensa-%s" % mcu))
 )
 
 
@@ -244,7 +244,7 @@ def populate_idf_env_vars(idf_env):
         os.path.dirname(get_python_exe()),
     ]
 
-    if mcu not in ("esp32c3", "esp32c6"):
+    if mcu not in ("esp32c2", "esp32c3", "esp32c6"):
         additional_packages.append(
             os.path.join(platform.get_package_dir("toolchain-esp32ulp"), "bin"),
         )
@@ -499,7 +499,7 @@ def extract_linker_script_fragments(framework_components_dir, sdk_config):
         sys.stderr.write("Error: Failed to extract paths to linker script fragments\n")
         env.Exit(1)
 
-    if mcu in ("esp32c3", "esp32c6"):
+    if mcu in ("esp32c2", "esp32c3", "esp32c6"):
         result.append(os.path.join(framework_components_dir, "riscv", "linker.lf"))
 
     # Add extra linker fragments
@@ -1517,7 +1517,7 @@ def _skip_prj_source_files(node):
         (
             board.get(
                 "upload.bootloader_offset",
-                "0x0" if mcu in ("esp32c3", "esp32c6", "esp32s3") else "0x1000",
+                "0x0" if mcu in ("esp32c2", "esp32c3", "esp32c6", "esp32s3") else "0x1000",
             ),
             os.path.join("$BUILD_DIR", "bootloader.bin"),
         ),
@@ -1597,7 +1597,7 @@ def _skip_prj_source_files(node):
 #
 
 ulp_dir = os.path.join(PROJECT_DIR, "ulp")
-if os.path.isdir(ulp_dir) and os.listdir(ulp_dir) and mcu not in ("esp32c3", "esp32c6"):
+if os.path.isdir(ulp_dir) and os.listdir(ulp_dir) and mcu not in ("esp32c2", "esp32c3", "esp32c6"):
     env.SConscript("ulp.py", exports="env sdk_config project_config idf_variant")
 
 #

builder/main.py

@@ -216,7 +216,7 @@ def __fetch_fs_size(target, source, env):
 mcu = board.get("build.mcu", "esp32")
 toolchain_arch = "xtensa-%s" % mcu
 filesystem = board.get("build.filesystem", "spiffs")
-if mcu in ("esp32c3", "esp32c6"):
+if mcu in ("esp32c2", "esp32c3", "esp32c6"):
     toolchain_arch = "riscv32-esp"
 
 if "INTEGRATION_EXTRA_DATA" not in env:
@@ -235,7 +235,7 @@ def __fetch_fs_size(target, source, env):
     GDB=join(
         platform.get_package_dir(
             "tool-riscv32-esp-elf-gdb"
-            if mcu in ("esp32c3", "esp32c6")
+            if mcu in ("esp32c2", "esp32c3", "esp32c6")
             else "tool-xtensa-esp-elf-gdb"
         )
         or "",

examples/espidf-hello-world/platformio.ini

@@ -18,6 +18,9 @@ board = esp32dev
 [env:esp32-s2-kaluga-1]
 board = esp32-s2-kaluga-1
 
+[env:esp8684-devkitm-1]
+board = esp8684-devkitm-1
+
 [env:esp32-c3-devkitm-1]
 board = esp32-c3-devkitm-1
 

platform.py

@@ -135,8 +135,8 @@ def configure_default_packages(self, variables, targets):
             else:
                 self.packages.pop("toolchain-xtensa-%s" % available_mcu, None)
 
-        if mcu in ("esp32s2", "esp32s3", "esp32c3", "esp32c6"):
-            # RISC-V based toolchain for ESP32C3, ESP32C6 ESP32S2, ESP32S3 ULP
+        if mcu in ("esp32s2", "esp32s3", "esp32c2", "esp32c3", "esp32c6"):
+            # RISC-V based toolchain for ESP32C2, ESP32C3, ESP32C6 ESP32S2, ESP32S3 ULP
             self.packages["toolchain-riscv32-esp"]["optional"] = False
 
         if build_core == "mbcwb":