commit 3143d9955c248ea40b5a676e09ac453136e1cbde
parent ecf51563722f52a5c010c9890c86f88d26a55126
Author: Christos Margiolis <christos@margiolis.net>
Date: Tue, 10 Jan 2023 03:03:01 +0200
new stuff
Diffstat:
6 files changed, 248 insertions(+), 0 deletions(-)
diff --git a/c_microcomputers/ex7/doc.pdf b/c_microcomputers/ex7/doc.pdf
Binary files differ.
diff --git a/c_microcomputers/ex7/doc.tex b/c_microcomputers/ex7/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 7}
+\author{Χρήστος Μαργιώλης -- 19390133}
+\date{Ιανουάριος 2023}
+
+\begin{document}
+
+\begin{titlepage}
+ \maketitle
+\end{titlepage}
+
+\section{Κύκλωμα}
+
+\includegraphics[width=\linewidth]{door.png}
+\pagebreak
+
+\section{Κώδικας}
+
+\lstinputlisting[language=C]{door.ino}
+
+\end{document}
diff --git a/c_microcomputers/ex7/door.ino b/c_microcomputers/ex7/door.ino
@@ -0,0 +1,115 @@
+#include <Encoder.h>
+
+#define PIN_ENC_CHAN1 2
+#define PIN_ENC_CHAN2 3
+#define PIN_L293D_IN 4
+#define PIN_L293D_OUT 5
+#define PIN_ULTRASONIC_ECHO 6
+#define PIN_ULTRASONIC_TRIGGER 7
+#define PIN_DCMOTOR 9
+#define PIN_PIR 10
+#define PIN_LED 13
+#define PIN_TEMP A0
+
+static Encoder enc(PIN_ENC_CHAN1, PIN_ENC_CHAN2);
+
+void
+setup()
+{
+ pinMode(PIN_ENC_CHAN1, INPUT);
+ pinMode(PIN_ENC_CHAN2, INPUT);
+ pinMode(PIN_L293D_IN, OUTPUT);
+ pinMode(PIN_L293D_OUT, OUTPUT);
+ pinMode(PIN_DCMOTOR, OUTPUT);
+ pinMode(PIN_PIR, INPUT);
+ pinMode(PIN_LED, OUTPUT);
+ pinMode(PIN_ULTRASONIC_ECHO, INPUT);
+ pinMode(PIN_ULTRASONIC_TRIGGER, OUTPUT);
+ Serial.begin(9600);
+}
+
+void
+loop()
+{
+ if (measure_distance() <= 40)
+ open_door();
+ if (measure_temp() > 20)
+ fan();
+ if (digitalRead(PIN_PIR) == HIGH)
+ digitalWrite(PIN_LED, HIGH);
+ else
+ digitalWrite(PIN_LED, LOW);
+
+ delay(10);
+}
+
+int
+measure_distance()
+{
+ long duration;
+ int distance;
+
+ digitalWrite(PIN_ULTRASONIC_TRIGGER, LOW);
+ delayMicroseconds(2);
+ digitalWrite(PIN_ULTRASONIC_TRIGGER, HIGH);
+ delayMicroseconds(10);
+ digitalWrite(PIN_ULTRASONIC_TRIGGER, LOW);
+
+ duration = pulseIn(PIN_ULTRASONIC_ECHO, HIGH);
+ distance = (float)duration * 0.344 / 20;
+
+ Serial.print("Distance: ");
+ Serial.print(distance);
+ Serial.println(" cm");
+
+ delay(100);
+
+ return (distance);
+}
+
+void
+open_door()
+{
+ long pos;
+ int rot;
+
+ analogWrite(PIN_L293D_IN, 30);
+ analogWrite(PIN_L293D_OUT, 0);
+ pos = enc.read() / 10;
+ rot = abs(pos) / 10;
+
+ Serial.print("Encoder position: ");
+ Serial.println(pos);
+ Serial.print("Encoder rotation: ");
+ Serial.println(rot);
+}
+
+float
+measure_temp()
+{
+ float temp;
+ int adc;
+
+ adc = analogRead(PIN_TEMP);
+ temp = (float)adc * (5000 / 1024.0);
+ temp = (temp - 500) / 10;
+
+ Serial.print("Temperatue: ");
+ Serial.print(temp);
+ Serial.println(" C");
+
+ delay(100);
+
+ return (temp);
+}
+
+void
+fan()
+{
+ int v;
+
+ for (v = 0; v <= 255; v += 5)
+ analogWrite(PIN_DCMOTOR, v);
+ for (v = 255; v >= 0; v -= 5)
+ analogWrite(PIN_DCMOTOR, v);
+}
diff --git a/c_microcomputers/ex7/door.png b/c_microcomputers/ex7/door.png
Binary files differ.
diff --git a/c_parallel_systems/ex2/Makefile b/c_parallel_systems/ex2/Makefile
@@ -0,0 +1,6 @@
+all:
+ cc ex2a.c -fopenmp -lomp -o ex2a
+ cc ex2b.c -fopenmp -lomp -o ex2b
+
+clean:
+ rm -f ex2a ex2b *.core
diff --git a/c_parallel_systems/ex2/ex2a.c b/c_parallel_systems/ex2/ex2a.c
@@ -0,0 +1,83 @@
+#include <err.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <omp.h>
+
+static int safe_input(const char *, ...);
+static void pretty_print(int *, int, const char *);
+
+static int
+safe_input(const char *fmt, ...)
+{
+ va_list args;
+ char buf[48];
+ int n, rc;
+
+ /* Collect the arguments into a buffer. */
+ va_start(args, fmt);
+ vsnprintf(buf, sizeof(buf), fmt, args);
+ va_end(args);
+
+ /*
+ * The following loop keeps asking for input as long as the current
+ * input wasn't correct. In this case "incorrect" input means anything
+ * other than digits.
+ */
+ do {
+ printf("\r%s", buf);
+ rc = scanf("%d", &n);
+ (void)getchar();
+ } while (rc != 1);
+
+ return (n);
+}
+
+/*
+ * Print the contents of a 2D array like:
+ *
+ * array = [x, y, z]
+ */
+static void
+pretty_print(int *arr, int n, const char *name)
+{
+ int i;
+
+ printf("\n%s = [", name);
+ for (i = 0; i < n; i++)
+ printf("%d%s", arr[i], (i == n - 1) ? "" : ", ");
+ printf("]\n");
+}
+
+int
+main(int argc, char *argv[])
+{
+ int *a, i, n, ntd;
+ double start, end;
+
+
+ ntd = safe_input("threads: ", 0);
+ omp_set_num_threads(ntd);
+
+ n = safe_input("n: ", 0);
+ if ((a = malloc(n * sizeof(int))) == NULL)
+ err(1, "malloc");
+ for (i = 0; i < n; i++)
+ a[i] = safe_input("a[%d]: ", i);
+
+ start = omp_get_wtime();
+
+ /* TODO */
+ <++>
+
+ end = omp_get_wtime();
+ printf("Total time: %f seconds\n", end - start);
+
+ pretty_print(a, n, "A_unsorted");
+ pretty_print(a, n, "A_multisort");
+
+ free(a);
+
+ return (0);
+}
