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In this section, we are going to work on our first project. The goal of this project is using HLS 
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approach to design a combinational circuit that controls a simple home alarm system.
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Before delving into the coding process, firstly we should define the system. This lecture will define 
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our simple home alarm system. 
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This picture shows the floor plan of our considered home.
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There is a sensor attached to each window in a bedroom. 
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The sensor detects whether the window is open or closed. 
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If the window is open, it generates a high voltage level corresponding to logic value 1. Otherwise, 
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its output is 0.
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Therefore, there are three window sensors in the system. 
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Also, there are two motion sensors in the living area and kitchen. 
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In the case of any motion detected by a motion sensor, it generates the logic value 1. The alarm 
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system also has a control panel that is used for monitoring and turning on/off the system. An
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on/off switch (denoted by SW) receives a specific patter of four bits to switch on the system. 
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The pattern that turns on the switch is the binary value of 1011. Seven segments are used 
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to show the status of sensors when the system is activated.
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We are going to implement this alarm system on the Basys3 board using its features.  Three slide 
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switches on the Basys3 board are used to model the window sensors. SW0,
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SW1 and SW2 model the window sensors W1, W2 and W3, respectively.
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Two slide switches SW6 and SW7 on the Basys3 board are used to represent the motion 
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sensors.
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3-	The four slide switches on the Basys3 board, SW12, SW13, SW14, SW15  are used to represent 
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the pattern for turning on the alarm system.
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Notice that SW12 represents the LSB and SW15 denotes the MSB of the pattern.
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We use a 16-bit variable in the code to read the status of slide switches.
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We use seven-segments on the Basys3 board to display the status of the system. 	When the system is OFF, 
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all seven segments show the letter 0. When the system is ON, and everything is OK, 
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all seven segments show the letter A.
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If a sensor detects a malfunction, then all seven segments show the letter E. In the case of detecting a malfunction
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by a window sensor, then the sensor number is shown on the first seven-segment 
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if we press a push-button, as shown in this figure.  In the case of detecting a malfunction by a motion 
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sensor, then the sensor number is shown on the second seven-segment if we press a push-button, as shown
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in this figure.
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We use a 5-bit arbitrary precision variable in the code to get the push-button states.
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Now we should describe our system using HLS C/C++ language. The next lecture will explain the structure 
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of the design code, as well as the test bench code.