Add readme for mdk dongle

keyboards/zmk-config/config/boards/arm/nrf52840_mdk_dongle/CMakeLists.txt

@@ -1,7 +1,14 @@
+#
+# Copyright (c) 2020 The ZMK Contributors
+# SPDX-License-Identifier: MIT
+#
+
+target_sources(app PRIVATE mdk_dongle_power_led.c)
+
 set_property(GLOBAL APPEND PROPERTY extra_post_build_commands
   COMMAND ${PYTHON_EXECUTABLE} ${ZEPHYR_BASE}/../tools/uf2/utils/uf2conv.py
   -c 
-  -b 0x26000
+  -b 0x1000
   -f 0xADA52840
   -o ${PROJECT_BINARY_DIR}/${CONFIG_KERNEL_BIN_NAME}.uf2
   ${PROJECT_BINARY_DIR}/${CONFIG_KERNEL_BIN_NAME}.bin

keyboards/zmk-config/config/boards/arm/nrf52840_mdk_dongle/README.md

@@ -0,0 +1,23 @@
+# nRF52840 MDK USB Dongle
+
+A basic USB stick that contains the nRF52840 chip from Nordic and has 12 GPIOs available.
+
+Additional detail: https://wiki.makerdiary.com/nrf52840-mdk-usb-dongle/
+
+## Hardware Features
+
+* Nordic nRF52840 System-on-Chip
+  * ARM® Cortex®-M4F processor optimized for ultra-low power operation
+  * Combining Bluetooth 5, Bluetooth Mesh, Thread, IEEE 802.15.4, ANT and 2.4GHz proprietary
+  * On-chip NFC-A tag
+  * On-chip USB 2.0 (Full speed) controller
+  * ARM TrustZone® Cryptocell 310 security subsystem
+  * 1 MB FLASH and 256 kB RAM
+* Up to 12 GPIOs available via headers
+* User programmable Button and RGB LED
+* On-board 2.4G chip antenna
+* 3.3V regulator with 1A peak current output
+* VBUS & VIN Power-Path Management
+* Convenient USB dongle form factor
+* Breadboard-friendly with dual 10-Pin headers
+* Measures 1.65" x 0.7" x 0.16" (42mm x 18mm x 4mm) without headers soldered in

keyboards/zmk-config/config/boards/arm/nrf52840_mdk_dongle/mdk_dongle_power_led.c

@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 2020 The ZMK Contributors
+ * Copyright (c) 2016 Intel Corporation
  *
- * SPDX-License-Identifier: MIT
+ * SPDX-License-Identifier: Apache-2.0
  */
 
 #include <zephyr.h>
@@ -9,26 +9,30 @@
 #include <devicetree.h>
 #include <drivers/gpio.h>
 
-#define POWER_LED_NODE DT_ALIAS(led1_red)
+/* The devicetree node identifier for the "led0" alias. */
+#define LED_NODE DT_ALIAS(ledblue)
 
-#if DT_NODE_HAS_STATUS(POWER_LED_NODE, okay)
-#define POWER_LED DT_GPIO_LABEL(POWER_LED_NODE, gpios)
-#define PIN DT_GPIO_PIN(POWER_LED_NODE, gpios)
-#define FLAGS DT_GPIO_FLAGS(POWER_LED_NODE, gpios)
+#if DT_NODE_HAS_STATUS(LED_NODE, okay)
+#define LED DT_GPIO_LABEL(LED_NODE, gpios)
+#define PIN DT_GPIO_PIN(LED_NODE, gpios)
+#define FLAGS DT_GPIO_FLAGS(LED_NODE, gpios)
 #else
-#error "Unsupported board: power led devicetree alias is not defined"
-#define POWER_LED ""
+/* A build error here means your board isn't set up to blink an LED. */
+#error "Unsupported board: led devicetree alias is not defined"
+#define LED0	""
 #define PIN	0
 #define FLAGS	0
 #endif
 
 static int pwr_led_init(const struct device *dev) {
-	dev = device_get_binding(POWER_LED);
+	int ret;
+
+	dev = device_get_binding(LED);
 	if (dev == NULL) {
 		return -EIO;
 	}
 
-	int ret = gpio_pin_configure(dev, PIN, GPIO_OUTPUT_ACTIVE | FLAGS);
+	ret = gpio_pin_configure(dev, PIN, GPIO_OUTPUT | FLAGS);
 	if (ret < 0) {
 		return -EIO;
 	}

keyboards/zmk-config/config/boards/arm/nrf52840_mdk_dongle/nrf52840_mdk_dongle.dts

@@ -11,66 +11,66 @@
 	compatible = "makerdiary,nrf52840_mdk_dongle";
 
 	chosen {
+		zephyr,code-partition = &code_partition;
 		zephyr,sram = &sram0;
 		zephyr,flash = &flash0;
-		zephyr,code-partition = &slot0_partition;
 	};
 
 	leds {
 		compatible = "gpio-leds";
-		led0_green: led_0 {
+		led_0: led_green {
 			gpios = <&gpio0 22 GPIO_ACTIVE_LOW>;
-			label = "Green LED 0";
+			label = "Green LED";
+			status = "okay";
 		};
-		led1_red: led_1 {
+		led_1: led_red {
 			gpios = <&gpio0 23 GPIO_ACTIVE_LOW>;
-			label = "Red LED 1";
+			label = "Red LED";
+			status = "okay";
 		};
-		led2_blue: led_2 {
+		led_2: led_blue {
 			gpios = <&gpio0 24 GPIO_ACTIVE_LOW>;
-			label = "Blue LED 2";
+			label = "Blue LED";
+			status = "okay";
 		};
 	};
 
 	pwmleds {
 		compatible = "pwm-leds";
-		pwm_led0_green: pwm_led_0 {
+		pwm_led_0: pwm_led_green {
 			pwms = <&pwm0 22>;
-			label = "Green PWM LED 0";
+			label = "Green PWM LED";
+			status = "okay";
 		};
-		pwm_led1_red: pwm_led_1 {
+		pwm_led_1: pwm_led_red {
 			pwms = <&pwm0 23>;
-			label = "Red PWM LED 1";
+			label = "Red PWM LED";
+			status = "okay";
 		};
-		pwm_led2_blue: pwm_led_2 {
+		pwm_led_2: pwm_led_blue {
 			pwms = <&pwm0 24>;
-			label = "Blue PWM LED 2";
+			label = "Blue PWM LED";
+			status = "okay";
 		};
 	};
 
 	buttons {
 		compatible = "gpio-keys";
-		button0: button_0 {
+		button0: button0 {
 			gpios = <&gpio0 18 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>;
-			label = "Push button switch 0";
+			label = "Push button 0";
+			status = "okay";
 		};
 	};
 
 	/* These aliases are provided for compatibility with samples */
 	aliases {
-		sw0 = &button0;
-		led0 = &led0_green;
-		led1 = &led1_red;
-		led2 = &led2_blue;
-		led0-green = &led0_green;
-		led1-red   = &led1_red;
-		led1-blue  = &led2_blue;
-		pwm-led0 = &pwm_led0_green;
-		pwm-led1 = &pwm_led1_red;
-		pwm-led2 = &pwm_led2_blue;
-		green-pwm-led = &pwm_led0_green;
-		red-pwm-led = &pwm_led1_red;
-		blue-pwm-led = &pwm_led2_blue;
+		ledgreen = &led_0;
+		ledred   = &led_1;
+		ledblue  = &led_2;
+		pwmledgreen = &pwm_led_0;
+		pwmledred = &pwm_led_1;
+		pwmledblue = &pwm_led_2;
 	};
 };
 
@@ -78,6 +78,10 @@
 	status = "okay";
 };
 
+&gpiote {
+	status = "okay";
+};
+
 &gpio0 {
 	status = "okay";
 };
@@ -89,42 +93,39 @@
 &flash0 {
 	/*
 	 * For more information, see:
-	 * https://docs.zephyrproject.org/latest/guides/dts/legacy-macros.html#legacy-flash-partitions
+	 * http://docs.zephyrproject.org/latest/devices/dts/flash_partitions.html
 	 */
 	partitions {
 		compatible = "fixed-partitions";
 		#address-cells = <1>;
 		#size-cells = <1>;
 
-		boot_partition: partition@0 {
-			label = "mcuboot";
-			reg = <0x000000000 0x0000C000>;
+		sd_partition: partition@0 {
+			label = "mbr";
+			reg = <0x00000000 0x00001000>;
 		};
-		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>;
+		code_partition: partition@1000 {
+			label = "code_partition";
+			reg = <0x00001000 0x000d3000>;
 		};
 
 		/*
-		 * The flash starting at 0x000f8000 and ending at
-		 * 0x000fffff is reserved for use by the application.
+		 * The flash starting at 0x000d4000 and ending at
+		 * 0x000f3fff is reserved for use by the application.
 		 */
 
 		/*
 		 * Storage partition will be used by FCB/LittleFS/NVS
 		 * if enabled.
 		 */
-		storage_partition: partition@f8000 {
+		storage_partition: partition@d4000 {
 			label = "storage";
-			reg = <0x000f8000 0x00008000>;
+			reg = <0x000d4000 0x00020000>;
+		};
+
+		boot_partition: partition@f4000 {
+			label = "adafruit_boot";
+			reg = <0x000f4000 0x0000c000>;
 		};
 	};
 };

keyboards/zmk-config/config/boards/arm/nrf52840_mdk_dongle/nrf52840_mdk_dongle.yaml

@@ -7,7 +7,9 @@ toolchain:
   - gnuarmemb
   - xtools
 supported:
+  - adc
   - usb_device
   - ble
   - ieee802154
   - pwm
+  - watchdog

keyboards/zmk-config/config/boards/arm/nrf52840_mdk_dongle/nrf52840_mdk_dongle_defconfig

@@ -15,3 +15,12 @@ CONFIG_GPIO=y
 
 # additional board options
 CONFIG_GPIO_AS_PINRESET=n
+
+CONFIG_USE_DT_CODE_PARTITION=y
+
+CONFIG_MPU_ALLOW_FLASH_WRITE=y
+CONFIG_NVS=y
+#CONFIG_SETTINGS_NVS=y
+CONFIG_FLASH=y
+CONFIG_FLASH_PAGE_LAYOUT=y
+CONFIG_FLASH_MAP=y