arduino_core_samples

Author: soburi

samples/modules/arduino_core/analog_input/CMakeLists.txt

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+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+# get value of NORMALIZED_BOARD_TARGET early
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE} COMPONENTS yaml boards)
+
+set(DTC_OVERLAY_FILE ${CMAKE_CURRENT_LIST_DIR}/../../variants/${NORMALIZED_BOARD_TARGET}/${NORMALIZED_BOARD_TARGET}.overlay)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(analog_input)
+
+target_sources(app PRIVATE src/main.cpp)
+zephyr_compile_options(-Wno-unused-variable -Wno-comment)

samples/modules/arduino_core/analog_input/README.rst

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+.. _analog_input:
+
+Analog Input
+############
+
+Overview
+********
+
+The analog_input sample blinks the LED with control of the period
+by the voltage of the input pin.
+Inputting high voltage to blink the LED slowly.
+Blink the LED fast on input voltage is low.
+When the input is 0V, LED light.
+
+Building and Running
+********************
+
+Build and flash analog_input sample as follows,
+
+```sh
+$> west build -p -b arduino_nano_33_ble sample/analog_input/
+
+$> west flash --bossac=/home/$USER/.arduino15/packages/arduino/tools/bossac/1.9.1-arduino2/bossac
+```

samples/modules/arduino_core/analog_input/prj.conf

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+CONFIG_ADC=y
+CONFIG_ARDUINO_API=y

samples/modules/arduino_core/analog_input/src/main.cpp

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+/*
+ * Copyright (c) 2022 TOKITA Hiroshi <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <Arduino.h>
+
+const int analog_input = A0;    // select the input pin for the potentiometer
+const int ledPin = LED_BUILTIN;      // select the pin for the LED
+const float wait_factor = 1.f;
+
+void setup() {
+  pinMode(ledPin, OUTPUT);
+}
+
+void loop() {
+  int value = 0;
+
+  value = analogRead(analog_input);
+
+  /* Blinks slowly when the input voltage is high */
+
+  digitalWrite(ledPin, HIGH);
+  delay(value * wait_factor);
+
+  digitalWrite(ledPin, LOW);
+  delay(value * wait_factor);
+}

samples/modules/arduino_core/attach_interrupt/CMakeLists.txt

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+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+# get value of NORMALIZED_BOARD_TARGET early
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE} COMPONENTS yaml boards)
+
+set(DTC_OVERLAY_FILE ${CMAKE_CURRENT_LIST_DIR}/../../variants/${NORMALIZED_BOARD_TARGET}/${NORMALIZED_BOARD_TARGET}.overlay)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(attach_interrupt)
+
+target_sources(app PRIVATE src/main.cpp)
+
+zephyr_compile_options(-Wno-unused-variable -Wno-comment)

samples/modules/arduino_core/attach_interrupt/README.rst

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+.. _attach_interrupt-sample:
+
+AttachInterrupt
+######
+
+Overview
+********
+
+This sample demonstrates how to use attachInterrupt API.
+
+Building and Running
+********************
+
+Build and flash attachInterrupt sample as follows,
+
+```sh
+$> west build  -p -b arduino_nano_33_ble samples/basic/attach_interrupt/ -DZEPHYR_EXTRA_MODULES=/home/$USER/zephyrproject/modules/lib/Arduino-Core-Zephyr
+
+$> west flash --bossac=/home/$USER/.arduino15/packages/arduino/tools/bossac/1.9.1-arduino2/bossac
+```
+
+Turn on the LED by detecting interrupts. And Turn off the next interrupt.

samples/modules/arduino_core/attach_interrupt/prj.conf

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+CONFIG_ARDUINO_API=y

samples/modules/arduino_core/attach_interrupt/src/main.cpp

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+/*
+ * Copyright (c) 2022 TOKITA Hiroshi <[email protected]>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <Arduino.h>
+
+const pin_size_t ledPin = LED_BUILTIN;
+const pin_size_t interruptPin = 2;
+PinStatus state = LOW;
+
+void blink() {
+  state = (state == LOW) ? HIGH : LOW;
+  digitalWrite(ledPin, state);
+}
+
+void setup() {
+  pinMode(ledPin, OUTPUT);
+  pinMode(interruptPin, INPUT_PULLUP);
+  attachInterrupt(interruptPin, blink, CHANGE);
+}
+
+void loop() {
+}

samples/modules/arduino_core/blinky_arduino/CMakeLists.txt

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+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.20.0)
+
+# get value of NORMALIZED_BOARD_TARGET early
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE} COMPONENTS yaml boards)
+
+set(DTC_OVERLAY_FILE ${CMAKE_CURRENT_LIST_DIR}/../../variants/${NORMALIZED_BOARD_TARGET}/${NORMALIZED_BOARD_TARGET}.overlay)
+
+find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
+project(blinky)
+
+target_sources(app PRIVATE src/main.cpp)
+
+zephyr_compile_options(-Wno-unused-variable -Wno-comment)

samples/modules/arduino_core/blinky_arduino/README.rst

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+.. _blinky-sample:
+
+Blinky
+######
+
+Overview
+********
+
+This Arduino Blinky sample blinks an LED forever using the `ArduinoAPI`.
+
+Requirements
+************
+
+Your board must:
+
+#. Have an LED connected via a GPIO pin (these are called "User LEDs" on many of
+   Zephyr's :ref:`boards`).
+#. Have the LED configured using the ``led0`` devicetree alias.
+
+Building and Running
+********************
+
+Build and flash Blinky as follows,
+
+```sh
+$> west build  -p -b arduino_nano_33_ble samples/basic/arduino-blinky/ -DZEPHYR_EXTRA_MODULES=/home/$USER/zephyrproject/modules/lib/Arduino-Core-Zephyr
+
+$> west flash --bossac=/home/$USER/.arduino15/packages/arduino/tools/bossac/1.9.1-arduino2/bossac
+```
+
+After flashing, the LED starts to blink. If a runtime error occurs, the sample
+exits without printing to the console.
+
+Adding board support
+********************
+
+To add support for your board, add something like this to your devicetree:
+
+.. code-block:: DTS
+
+   / {
+   	aliases {
+   		led0 = &myled0;
+   	};
+
+   	leds {
+   		compatible = "gpio-leds";
+   		myled0: led_0 {
+   			gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
+                };
+   	};
+   };
+
+The above sets your board's ``led0`` alias to use pin 13 on GPIO controller
+``gpio0``. The pin flags :c:macro:`GPIO_ACTIVE_HIGH` mean the LED is on when
+the pin is set to its high state, and off when the pin is in its low state.
+
+Tips:
+
+- See :dtcompatible:`gpio-leds` for more information on defining GPIO-based LEDs
+  in devicetree.
+
+- If you're not sure what to do, check the devicetrees for supported boards which
+  use the same SoC as your target. See :ref:`get-devicetree-outputs` for details.
+
+- See :zephyr_file:`include/zephyr/dt-bindings/gpio/gpio.h` for the flags you can use
+  in devicetree.
+
+- If the LED is built in to your board hardware, the alias should be defined in
+  your :ref:`BOARD.dts file <devicetree-in-out-files>`. Otherwise, you can
+  define one in a :ref:`devicetree overlay <set-devicetree-overlays>`.