Custom board

CMakeLists.txt

@@ -3,4 +3,4 @@ find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
 
 project(hellobt)
 
-target_sources(app PRIVATE src/main.c)
+target_sources(app PRIVATE src/main.cpp)

boards/arm/nrf52840_test/Kconfig.board

@@ -0,0 +1,6 @@
+# Copyright (c) 2023 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+config BOARD_NRF52840_TEST
+	bool "nrf52840_test"
+	depends on SOC_NRF52840_QIAA

boards/arm/nrf52840_test/Kconfig.defconfig

@@ -0,0 +1,12 @@
+# Copyright (c) 2023 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+if BOARD_NRF52840_TEST
+
+config BOARD
+	default "nrf52840_test"
+
+config BT_CTLR
+   default BT
+
+endif

boards/arm/nrf52840_test/board.cmake

@@ -0,0 +1,9 @@
+# Copyright (c) 2023 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+board_runner_args(jlink "--device=nrf52" "--speed=4000")
+board_runner_args(pyocd "--target=nrf52840" "--frequency=4000000")
+
+include(${ZEPHYR_BASE}/boards/common/nrfjprog.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/jlink.board.cmake)
+include(${ZEPHYR_BASE}/boards/common/pyocd.board.cmake)

boards/arm/nrf52840_test/nrf52840_test-pinctrl.dtsi

@@ -0,0 +1,23 @@
+$pinctrl {
+	uart0_default: uart0_default {
+		group1 {
+			psels = <NRF_PSEL(UART_TX, 0, 6)>,
+				<NRF_PSEL(UART_RTS, 0, 5)>;
+		};
+		group2 {
+			psels = <NRF_PSEL(UART_RX, 0, 8)>,
+				<NRF_PSEL(UART_CTS, 0, 7)>;
+			bias-pull-up;
+		};
+	};
+
+	uart0_sleep: uart0_sleep {
+		group1 {
+			psels = <NRF_PSEL(UART_TX, 0, 6)>,
+				<NRF_PSEL(UART_RX, 0, 8)>,
+				<NRF_PSEL(UART_RTS, 0, 5)>,
+				<NRF_PSEL(UART_CTS, 0, 7)>;
+			low-power-enable;
+		};
+	};
+};

boards/arm/nrf52840_test/nrf52840_test.dts

@@ -0,0 +1,106 @@
+// Copyright (c) 2023 Nordic Semiconductor ASA
+// SPDX-License-Identifier: Apache-2.0
+
+/dts-v1/;
+#include <nordic/nrf52840_qiaa.dtsi>
+
+/ {
+	model = "nrf52840_test";
+	compatible = "nrf52840-test";
+
+	chosen {
+		zephyr,console = &uart0;
+		zephyr,shell-uart = &uart0;
+		zephyr,uart-mcumgr = &uart0;
+		zephyr,bt-mon-uart = &uart0;
+		zephyr,bt-c2h-uart = &uart0;
+		zephyr,sram = &sram0;
+		zephyr,flash = &flash0;
+		zephyr,code-partition = &slot0_partition;
+	};
+
+	leds {
+		compatible = "gpio-leds";
+		led0: led_0 {
+			gpios = <&gpio0 23 0>;
+		};
+
+		led1: led_1 {
+			gpios = <&gpio0 22 0>;
+		};
+
+		led2: led_2 {
+			gpios = <&gpio0 24 0>;
+		};
+	};
+
+	buttons {
+		compatible = "gpio-keys";
+		button0: button_0 {
+			gpios = <&gpio0 18 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+		};
+	};
+
+	aliases {
+		led0 = &led0;
+	};
+};
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		boot_partition: partition@0 {
+			label = "mcuboot";
+			reg = <0x0 0xc000>;
+		};
+		slot0_partition: partition@c000 {
+			label = "image-0";
+			reg = <0xc000 0x72000>;
+		};
+		slot1_partition: partition@7e000 {
+			label = "image-1";
+			reg = <0x7e000 0x72000>;
+		};
+		scratch_partition: partition@f0000 {
+			label = "image-scratch";
+			reg = <0xf0000 0xa000>;
+		};
+		storage_partition: partition@fa000 {
+			label = "storage";
+			reg = <0xfa000 0x6000>;
+		};
+	};
+};
+
+&gpio0 {
+	status = "okay";
+};
+
+&uart0 {
+	status = "okay";
+	pinctrl-0 = <&uart0_default>;
+	pinctrl-names = "default";
+	current-speed = <115200>;
+};
+
+&pinctrl {
+	uart0_default: uart0_default {
+		group1 {
+			psels = <NRF_PSEL(UART_TX, 0, 6)>,
+		   <NRF_PSEL(UART_RX, 0, 8)>,
+		   <NRF_PSEL(UART_RTS, 0, 5)>,
+		   <NRF_PSEL(UART_CTS, 0, 7)>;
+		};
+	};
+};
+
+&adc {
+	status = "okay";
+};
+
+&usbd {
+	status = "okay";
+};

boards/arm/nrf52840_test/nrf52840_test.yaml

@@ -0,0 +1,13 @@
+# Copyright (c) 2023 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+identifier: nrf52840_test
+name: nrf52840_test
+type: mcu
+arch: arm
+ram: 256
+flash: 1024
+toolchain:
+  - zephyr
+  - gnuarmemb
+  - xtools

boards/arm/nrf52840_test/nrf52840_test_defconfig

@@ -0,0 +1,27 @@
+# Copyright (c) 2023 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_SOC_SERIES_NRF52X=y
+CONFIG_SOC_NRF52840_QIAA=y
+CONFIG_BOARD_NRF52840_TEST=y
+
+# Enable MPU
+CONFIG_ARM_MPU=y
+
+# Enable hardware stack protection
+CONFIG_HW_STACK_PROTECTION=y
+
+# Enable GPIO
+CONFIG_GPIO=y
+
+# Enable uart driver
+CONFIG_SERIAL=y
+
+# Enable console
+CONFIG_CONSOLE=y
+CONFIG_UART_CONSOLE=y
+
+# Additional board options
+CONFIG_GPIO_AS_PINRESET=y
+
+CONFIG_PINCTRL=y

prj.conf

@@ -1 +1,13 @@
+# Enalbe C++20
+CONFIG_CPP=y
+CONFIG_STD_CPP20=y
+CONFIG_CPP_MAIN=y
 
+# Enable random number
+CONFIG_ENTROPY_GENERATOR=y
+
+# Enable Bluetooth
+CONFIG_BT=y
+CONFIG_BT_HCI=y
+CONFIG_BT_CTLR=y
+CONFIG_BT_LL_SW_SPLIT=y

src/main.c

@@ -1,6 +0,0 @@
-#include <zephyr/kernel.h>
-
-int main(void)
-{
-        return 0;
-}

src/main.cpp

@@ -0,0 +1,18 @@
+#include "zephyr/kernel.h"
+#include "zephyr/drivers/gpio.h"
+#include "zephyr/random/rand32.h"
+
+#define LED_NODE DT_ALIAS(led0)
+static gpio_dt_spec led = GPIO_DT_SPEC_GET(LED_NODE, gpios);
+
+auto main() -> int {
+    if (!gpio_is_ready_dt(&led)) return 1;
+    if (gpio_pin_configure_dt(&led, GPIO_OUTPUT_ACTIVE) < 0) return 1;
+
+    gpio_pin_set_dt(&led, 0);
+    while (true) {
+        printk("Hello, World! %d - %u\n", 100'000, sys_rand32_get());
+        k_msleep(250);
+    }
+    return 0;
+}