uni

commit 307ec6e9f8bc37f1f18defe3f2e9906c686e958d
parent 328337343bb5137b66dcec935617bceaaaf990a7
Author: Christos Margiolis <christos@margiolis.net>
Date:   Mon, 16 Jan 2023 20:21:43 +0200

ex8

Diffstat:
A
c_microcomputers/ex8/doc.pdf
 | 
0

A
c_microcomputers/ex8/doc.tex
 | 
44
++++++++++++++++++++++++++++++++++++++++++++
A
c_microcomputers/ex8/radar.ino
 | 
70
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
c_microcomputers/ex8/radar.png
 | 
0

4 files changed, 114 insertions(+), 0 deletions(-)
diff --git a/c_microcomputers/ex8/doc.pdf b/c_microcomputers/ex8/doc.pdf
Binary files differ.
diff --git a/c_microcomputers/ex8/doc.tex b/c_microcomputers/ex8/doc.tex
@@ -0,0 +1,44 @@
+\documentclass{article}
+\usepackage[utf8]{inputenc}
+\usepackage[greek,english]{babel}
+\usepackage{alphabeta}
+\usepackage{fancyhdr}
+\usepackage{listings}
+\usepackage{mathtools}
+\usepackage{xcolor}
+\usepackage[backend=bibtex]{biblatex}
+\usepackage{hyperref}
+\usepackage[left=1cm,right=1cm]{geometry}
+\hypersetup{
+	colorlinks=true,
+	linktoc=all,
+	linkcolor=black,
+}
+\lstset {
+        basicstyle=\ttfamily,
+        columns=fullflexible,
+        breaklines=true,
+        keepspaces=true,
+	showstringspaces=false
+}
+
+\title{Μικροϋπολογιστές: Εργαστηριακή άσκηση 8}
+\author{Χρήστος Μαργιώλης -- 19390133}
+\date{Ιανουάριος 2023}
+
+\begin{document}
+
+\begin{titlepage}
+        \maketitle
+\end{titlepage}
+
+\section{Κύκλωμα}
+
+\includegraphics[width=\linewidth]{radar.png}
+\pagebreak
+
+\section{Κώδικας}
+
+\lstinputlisting[language=C]{radar.ino}
+
+\end{document}
diff --git a/c_microcomputers/ex8/radar.ino b/c_microcomputers/ex8/radar.ino
@@ -0,0 +1,70 @@
+#include <LiquidCrystal.h>
+#include <Servo.h>
+
+#define PIN_SERVO_X 3
+#define PIN_SERVO_Y 4
+#define PIN_ULTRASONIC_ECHO 11
+#define PIN_ULTRASONIC_TRIGGER 12
+
+LiquidCrystal lcd(10, 9, 8, 7, 6, 5);
+Servo servo_x, servo_y;
+
+void
+setup()
+{
+	pinMode(PIN_ULTRASONIC_ECHO, INPUT);
+	pinMode(PIN_ULTRASONIC_TRIGGER, OUTPUT);
+	servo_x.attach(PIN_SERVO_X);
+	servo_y.attach(PIN_SERVO_Y);
+	servo_x.write(0);
+	servo_y.write(0);
+	lcd.begin(16, 2);
+	Serial.begin(9600);
+}
+
+void
+loop()
+{
+	int x, y;
+
+	/*
+	 * in reality, the ultrasonic sensor is supposed to be mounted on the 2
+	 * servos so that it is able to move around.
+	 */
+	for (x = 0; x < 180; x++)
+		for (y = 0; y < 180; y++)
+			move_and_calc_distance(x, y);
+	for (x = 180; x >= 0; x--)
+		for (y = 180; y >= 0; y--)
+			move_and_calc_distance(x, y);
+	
+	delay(250);
+}
+
+void
+move_and_calc_distance(int x, int y)
+{
+	float pingtime, distance;
+
+	servo_x.write(x);
+	servo_y.write(y);
+	delay(10);
+
+	digitalWrite(PIN_ULTRASONIC_TRIGGER, LOW);
+	delayMicroseconds(2);
+	digitalWrite(PIN_ULTRASONIC_TRIGGER, HIGH);
+	delayMicroseconds(10);
+	digitalWrite(PIN_ULTRASONIC_TRIGGER, LOW);
+
+	pingtime = pulseIn(PIN_ULTRASONIC_ECHO, HIGH);
+	/* calculate distance in cm */
+	distance = (float)pingtime * 0.344 / 20;
+
+	lcd.clear();
+	lcd.setCursor(0, 0);
+	lcd.print("Distance: ");
+	lcd.setCursor(0, 1);
+	lcd.print(distance);
+	lcd.print(" cm");
+	delay(50);
+}
diff --git a/c_microcomputers/ex8/radar.png b/c_microcomputers/ex8/radar.png
Binary files differ.