Add 5G-NB-IoT Board + Arduino Core Support

boards/5g_nb_iot.json

@@ -0,0 +1,60 @@
+{
+  "build": {
+    "arduino": {
+        "ldscript": "flash_with_bootloader.ld"
+    },
+    "core": "5gnbiot",
+    "cpu": "cortex-m0plus",
+    "extra_flags": "-DARDUINO_SAMD_ZERO -D__SAMD21G18A__",
+    "f_cpu": "48000000L",
+    "hwids": [
+      [
+        "0x2341",
+        "0x804D"
+      ],
+      [
+        "0x2341",
+        "0x004D"
+      ],
+      [
+        "0x2341",
+        "0x824D"
+      ]
+    ],
+    "mcu": "samd21g18a",
+    "usb_product": "5G-NB-IoT",
+    "variant": "arduino_zero"
+  },
+  "debug": {
+    "jlink_device": "ATSAMD21G18",
+    "onboard_tools": [
+      "cmsis-dap"
+    ],
+    "openocd_chipname": "at91samd21g18",
+    "openocd_target": "at91samdXX",
+    "svd_path": "ATSAMD21G18A.svd"
+  },
+  "frameworks": [
+    "arduino"
+  ],
+  "name": "5G-NB-IoT",
+  "upload": {
+    "disable_flushing": true,
+    "maximum_ram_size": 32768,
+    "maximum_size": 262144,
+    "native_usb": true,
+    "offset_address": "0x2000",
+    "protocol": "sam-ba",
+    "protocols": [
+      "sam-ba",
+      "blackmagic",
+      "jlink",
+      "atmel-ice"
+    ],
+    "require_upload_port": true,
+    "use_1200bps_touch": true,
+    "wait_for_upload_port": true
+  },
+  "url": "https://5ghub.us/product/lte-narrowband-internet-of-things-nb-iot-and-global-navigation-satellite-system-gnss-kit-with-ltegps-antenna-arduino-and-freertos-compatible/",
+  "vendor": "Arduino LLC"
+}

examples/arduino-blink/platformio.ini

@@ -121,3 +121,8 @@ framework = arduino
 platform = atmelsam
 board = seeed_wio_lite_mg126
 framework = arduino
+
+[env:5g_nb_iot]
+platform = atmelsam
+board = 5g_nb_iot
+framework = arduino

platform.json

@@ -55,6 +55,11 @@
       "owner": "platformio",
       "version": "~1.8.13"
     },
+    "framework-arduino-samd-5gnbiot": {
+      "type": "framework",
+      "optional": true,
+      "version": "https://github.com/maxgerhardt/framework-arduino-samd-5gnbiot.git"
+    },
     "framework-arduino-samd-adafruit": {
       "type": "framework",
       "optional": true,

platform.py

@@ -69,6 +69,12 @@ def configure_default_packages(self, variables, targets):
                 self.packages["toolchain-gccarmnoneeabi"]["version"] = "~1.90301.0"
             if build_core in ("adafruit", "seeed"):
                 self.packages["framework-cmsis"]["version"] = "~2.50400.0"
+            if build_core in ("5gnbiot"):
+                self.packages["toolchain-gccarmnoneeabi"][
+                    "version"] = ">=1.40803.0,<1.40805.0"
+                self.packages["tool-bossac"]["version"] = "~1.10700.0"
+                self.packages["framework-cmsis"]["version"] = "~1.40500.0"
+                self.packages["framework-cmsis-atmel"]["version"] = "~1.1.0"
 
         if (
             board.get("build.core", "") in ("adafruit", "seeed", "sparkfun")