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libraries/bsec2/examples/bme68x_demo_sample/label_provider.cpp

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+/*!
+ * Copyright (c) 2021 Bosch Sensortec GmbH. All rights reserved.
+ *
+ * BSD-3-Clause
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * 3. Neither the name of the copyright holder nor the names of its
+ *    contributors may be used to endorse or promote products derived from
+ *    this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+ * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @file	    label_provider.cpp
+ * @date		03 Jan 2024
+ * @version		2.1.5
+ * 
+ * @brief       label provider
+ *
+ * 
+ */
+
+/* own header include */
+#include "label_provider.h"
+
+volatile gas_label labelProvider::_label;
+volatile bool labelProvider::_but1_pressed, labelProvider::_but2_pressed;
+
+QueueHandle_t labelProvider::_queue = nullptr; 
+
+/*!
+ * @brief The constructor of the label_provider class
+ */
+labelProvider::labelProvider()
+{}
+
+/*!
+ * @brief This function initializes the label provider module
+ */
+void labelProvider::begin()
+{
+	_but1_pressed = false;
+	_but2_pressed = false;
+	
+	_queue = xQueueCreate(2, sizeof(gas_label));
+	
+	/* Button interrupts setup and attachment */
+	pinMode(PIN_BUTTON_1, INPUT_PULLUP);
+	pinMode(PIN_BUTTON_2, INPUT_PULLUP);
+
+	attachInterrupt(digitalPinToInterrupt(PIN_BUTTON_1), isr_button1, CHANGE);
+	attachInterrupt(digitalPinToInterrupt(PIN_BUTTON_2), isr_button2, CHANGE);
+}
+
+/*!
+ * @brief This function is the interrupt function, that handles the button press of the first button
+ */
+void labelProvider::isr_button1()
+{
+    /* check if button is pressed or idle */
+	if (_but1_pressed == false)
+	{
+		/* determine if only this button or both are pressed and set helper button label */
+		_but1_pressed = true;
+		
+		if (_but2_pressed)
+		{
+			_label = BSEC_CLASS_3;
+		}
+		else
+		{
+			_label = BSEC_CLASS_1;
+		}
+	}
+	else
+	{
+		/* if both buttons are released, user label according to helper button label */
+		_but1_pressed = false;
+		
+		if (!_but2_pressed)
+		{
+			xQueueSendFromISR(_queue, (const void*)&_label, 0);
+		}
+	}
+}
+
+/*!
+ * @brief This function is the interrupt function, that handles the button press of the second button
+ */
+void labelProvider::isr_button2()
+{
+	/* check if button is pressed or idle */
+	if (_but2_pressed == false)
+	{
+		/* determine if only this button or both are pressed and set helper button label */
+		_but2_pressed = true;
+		
+		if (_but1_pressed)
+		{
+			_label = BSEC_CLASS_3;
+		}
+		else
+		{
+			_label = BSEC_CLASS_2;
+		}
+	}
+	else
+	{
+		/* if both buttons are released, user label according to helper button label */
+		_but2_pressed = false;
+		
+		if (!_but1_pressed)
+		{
+			xQueueSendFromISR(_queue, (const void*)&_label, 0);
+		}
+	}
+}
+
+/*!
+ * @brief This function retrieves the current label
+ */
+bool labelProvider::get_label(gas_label &label)
+{
+	return xQueueReceive(_queue, &label, 0);
+}