boards: adafruit feather nrf52840 update UF2

Add support for flashing the Adafruit Feather nrf52840 Express
using UF2 over USB.

Also standardise on using the UF2 variant, so add a non UF2 variant
of the Sense board, so it can be flashed using the SWD headers.

Created flash dtsi files for both SWD and UF2. These are actually identical
for many other boards and should probably be moved to common in future.

Signed-off-by: Jacob Winther <[email protected]>

Author: jacobw

boards/adafruit/feather_nrf52840/adafruit_feather_nrf52840.dts

@@ -6,8 +6,8 @@
  */
 
 /dts-v1/;
-
 #include "adafruit_feather_nrf52840_common.dtsi"
+#include "adafruit_feather_nrf52840_flash.dtsi"
 
 / {
 	model = "Adafruit Feather nRF52840 Express";
@@ -19,7 +19,6 @@
 		zephyr,uart-mcumgr = &uart0;
 		zephyr,bt-mon-uart = &uart0;
 		zephyr,bt-c2h-uart = &uart0;
-		zephyr,code-partition = &slot0_partition;
 	};
 
 	leds {
@@ -28,39 +27,3 @@
 		};
 	};
 };
-
-&flash0 {
-	partitions {
-		compatible = "fixed-partitions";
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		boot_partition: partition@0 {
-			label = "mcuboot";
-			reg = <0x00000000 0x0000C000>;
-		};
-		slot0_partition: partition@c000 {
-			label = "image-0";
-			reg = <0x0000C000 0x00067000>;
-		};
-		slot1_partition: partition@73000 {
-			label = "image-1";
-			reg = <0x00073000 0x00067000>;
-		};
-		scratch_partition: partition@da000 {
-			label = "image-scratch";
-			reg = <0x000da000 0x0001e000>;
-		};
-
-		/*
-		 * The flash starting at 0x000f8000 and ending at
-		 * 0x000fffff is reserved for use by the application.
-		 */
-
-		/* Storage partition will be used by FCB/NFFS/NVS if enabled. */
-		storage_partition: partition@f8000 {
-			label = "storage";
-			reg = <0x000f8000 0x00008000>;
-		};
-	};
-};

boards/adafruit/feather_nrf52840/adafruit_feather_nrf52840_common.dtsi

@@ -15,7 +15,6 @@
 
 	chosen {
 		zephyr,sram = &sram0;
-		zephyr,flash = &flash0;
 		zephyr,ieee802154 = &ieee802154;
 	};
 

boards/adafruit/feather_nrf52840/adafruit_feather_nrf52840_flash.dtsi

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2024 Jacob Winther
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/ {
+	chosen {
+		zephyr,flash = &flash0;
+		zephyr,code-partition = &slot0_partition;
+	};
+};
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x00000000 0x0000C000>;
+		};
+		slot0_partition: partition@c000 {
+			label = "image-0";
+			reg = <0x0000C000 0x00077000>;
+		};
+		slot1_partition: partition@83000 {
+			label = "image-1";
+			reg = <0x00083000 0x00075000>;
+		};
+
+		/*
+		 * The flash starting at 0x000f8000 and ending at
+		 * 0x000fffff is reserved for use by the application.
+		 */
+
+		/*
+		 * Storage partition will be used by FCB/LittleFS/NVS
+		 * if enabled.
+		 */
+		storage_partition: partition@f8000 {
+			label = "storage";
+			reg = <0x000f8000 0x00008000>;
+		};
+	};
+};

boards/adafruit/feather_nrf52840/adafruit_feather_nrf52840_flash_uf2.dtsi

@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2024 Jacob Winther
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Default flash layout for nrf52840 using UF2
+ */
+
+/ {
+	chosen {
+		zephyr,flash = &flash0;
+		zephyr,code-partition = &code_partition;
+	};
+};
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		/* To enable flashing with UF2 bootloader, we
+		 * must reserve a partition for SoftDevice.
+		 * See https://learn.adafruit.com/
+		 *     introducing-the-adafruit-nrf52840-feather?view=all#hathach-memory-map
+		 */
+		reserved_partition_0: partition@0 {
+			label = "SoftDevice";
+			read-only;
+			reg = <0x000000000 DT_SIZE_K(152)>;
+		};
+		code_partition: partition@26000 {
+			label = "Application";
+			reg = <0x00026000 DT_SIZE_K(796)>;
+		};
+
+		/*
+		 * The flash starting at 0x000ed000 and ending at
+		 * 0x000f4000 is reserved for use by the application.
+		 */
+		storage_partition: partition@ed000 {
+			label = "storage";
+			reg = <0x0000ed000 DT_SIZE_K(28)>;
+		};
+
+		boot_partition: partition@f4000 {
+			label = "UF2";
+			read-only;
+			reg = <0x000f4000 DT_SIZE_K(48)>;
+		};
+	};
+};

boards/adafruit/feather_nrf52840/adafruit_feather_nrf52840_nrf52840_sense.dts

@@ -1,24 +1,23 @@
 /*
- * Copyright (c) 2020 Tobias Svehagen
  * Copyright (c) 2024 Jacob Winther
  *
  * SPDX-License-Identifier: Apache-2.0
  */
 
 /dts-v1/;
 #include "adafruit_feather_nrf52840_common.dtsi"
+#include "adafruit_feather_nrf52840_flash.dtsi"
 
 / {
 	model = "Adafruit Feather nRF52840 Sense";
-	compatible = "adafruit,feather-nrf52840-sense";
+	compatible = "adafruit,feather-nrf52840-sense-uf2";
 
 	chosen {
-		zephyr,console = &cdc_acm_uart0;
-		zephyr,shell-uart = &cdc_acm_uart0;
-		zephyr,uart-mcumgr = &cdc_acm_uart0;
-		zephyr,bt-mon-uart = &cdc_acm_uart0;
-		zephyr,bt-c2h-uart = &cdc_acm_uart0;
-		zephyr,code-partition = &code_partition;
+		zephyr,console = &uart0;
+		zephyr,shell-uart = &uart0;
+		zephyr,uart-mcumgr = &uart0;
+		zephyr,bt-mon-uart = &uart0;
+		zephyr,bt-c2h-uart = &uart0;
 	};
 
 	leds {
@@ -34,47 +33,3 @@
 		reg = <0x44>;
 	};
 };
-
-&flash0 {
-	partitions {
-		compatible = "fixed-partitions";
-		#address-cells = <1>;
-		#size-cells = <1>;
-
-		/* To enable flashing with UF2 bootloader, we
-		 * must reserve a partition for SoftDevice.
-		 * See https://learn.adafruit.com/
-		 *     introducing-the-adafruit-nrf52840-feather?view=all#hathach-memory-map
-		 */
-		reserved_partition_0: partition@0 {
-			label = "SoftDevice";
-			read-only;
-			reg = <0x000000000 DT_SIZE_K(152)>;
-		};
-		code_partition: partition@26000 {
-			label = "Application";
-			reg = <0x00026000 DT_SIZE_K(796)>;
-		};
-
-		/*
-		 * The flash starting at 0x000ed000 and ending at
-		 * 0x000f4000 is reserved for use by the application.
-		 */
-		storage_partition: partition@ed000 {
-			label = "storage";
-			reg = <0x0000ed000 DT_SIZE_K(28)>;
-		};
-
-		boot_partition: partition@f4000 {
-			label = "UF2";
-			read-only;
-			reg = <0x000f4000 DT_SIZE_K(48)>;
-		};
-	};
-};
-
-zephyr_udc0: &usbd {
-	cdc_acm_uart0: cdc_acm_uart0 {
-		compatible = "zephyr,cdc-acm-uart";
-	};
-};

boards/adafruit/feather_nrf52840/adafruit_feather_nrf52840_nrf52840_sense_defconfig

@@ -16,12 +16,3 @@ CONFIG_UART_CONSOLE=y
 # 32kHz clock source
 CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
 CONFIG_CLOCK_CONTROL_NRF_K32SRC_500PPM=y
-
-# Logger cannot use itself to log
-CONFIG_USB_CDC_ACM_LOG_LEVEL_OFF=y
-
-# Enable USB
-CONFIG_USB_DEVICE_STACK=y
-
-# Build UF2 by default, supported by the Adafruit nRF52 Bootloader
-CONFIG_BUILD_OUTPUT_UF2=y

boards/adafruit/feather_nrf52840/adafruit_feather_nrf52840_nrf52840_sense_uf2.dts

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2020 Tobias Svehagen
+ * Copyright (c) 2024 Jacob Winther
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include "adafruit_feather_nrf52840_common.dtsi"
+#include "adafruit_feather_nrf52840_flash_uf2.dtsi"
+
+/ {
+	model = "Adafruit Feather nRF52840 Sense";
+	compatible = "adafruit,feather-nrf52840-sense-uf2";
+
+	chosen {
+		zephyr,console = &cdc_acm_uart0;
+		zephyr,shell-uart = &cdc_acm_uart0;
+		zephyr,uart-mcumgr = &cdc_acm_uart0;
+		zephyr,bt-mon-uart = &cdc_acm_uart0;
+		zephyr,bt-c2h-uart = &cdc_acm_uart0;
+	};
+
+	leds {
+		led0: led_0 {
+			gpios = <&gpio1 9 0>;
+		};
+	};
+};
+
+&i2c0 {
+	SHT3XD: sht3xd@44 {
+		compatible = "sensirion,sht3xd";
+		reg = <0x44>;
+	};
+};
+
+zephyr_udc0: &usbd {
+	cdc_acm_uart0: cdc_acm_uart0 {
+		compatible = "zephyr,cdc-acm-uart";
+	};
+};

boards/adafruit/feather_nrf52840/adafruit_feather_nrf52840_nrf52840_sense_uf2.yaml

@@ -0,0 +1,19 @@
+identifier: adafruit_feather_nrf52840/nrf52840/sense/uf2
+name: Adafruit Feather nRF52840 Sense UF2
+type: mcu
+arch: arm
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools
+supported:
+  - adc
+  - usb_device
+  - usb_cdc
+  - ble
+  - watchdog
+  - counter
+  - feather_serial
+  - feather_i2c
+  - feather_spi
+vendor: adafruit

boards/adafruit/feather_nrf52840/adafruit_feather_nrf52840_nrf52840_sense_uf2_defconfig

@@ -0,0 +1,27 @@
+# SPDX-License-Identifier: Apache-2.0
+
+# Enable MPU
+CONFIG_ARM_MPU=y
+
+# Enable GPIO
+CONFIG_GPIO=y
+
+# Enable UART driver
+CONFIG_SERIAL=y
+
+# Enable console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+# 32kHz clock source
+CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y
+CONFIG_CLOCK_CONTROL_NRF_K32SRC_500PPM=y
+
+# Logger cannot use itself to log
+CONFIG_USB_CDC_ACM_LOG_LEVEL_OFF=y
+
+# Enable USB
+CONFIG_USB_DEVICE_STACK=y
+
+# Build UF2 by default, supported by the Adafruit nRF52 Bootloader
+CONFIG_BUILD_OUTPUT_UF2=y

boards/adafruit/feather_nrf52840/adafruit_feather_nrf52840_nrf52840_uf2.dts

@@ -0,0 +1,34 @@
+/*
+ * Copyright (c) 2024 Jacob Winther
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+/dts-v1/;
+#include "adafruit_feather_nrf52840_common.dtsi"
+#include "adafruit_feather_nrf52840_flash_uf2.dtsi"
+
+/ {
+	model = "Adafruit Feather nRF52840 Express";
+	compatible = "adafruit,feather-nrf52840-uf2";
+
+	chosen {
+		zephyr,console = &cdc_acm_uart0;
+		zephyr,shell-uart = &cdc_acm_uart0;
+		zephyr,uart-mcumgr = &cdc_acm_uart0;
+		zephyr,bt-mon-uart = &cdc_acm_uart0;
+		zephyr,bt-c2h-uart = &cdc_acm_uart0;
+	};
+
+	leds {
+		led0: led_0 {
+			gpios = <&gpio1 15 0>;
+		};
+	};
+};
+
+zephyr_udc0: &usbd {
+	cdc_acm_uart0: cdc_acm_uart0 {
+		compatible = "zephyr,cdc-acm-uart";
+	};
+};