Update README, init 04_intro_to_sockets

04_intro_to_sockets/Makefile

@@ -0,0 +1,39 @@
+CC = gcc
+CFLAGS = -Wall -Ilib
+#LDFLAGS = -lgpiod
+
+# Directories
+SRCDIR = src
+LIBDIR = lib
+OBJDIR = obj
+
+# Source files
+LIB_SOURCES = $(wildcard $(LIBDIR)/*.c)
+SRC_SOURCES = $(wildcard $(SRCDIR)/*.c)
+
+# Object files
+LIB_OBJECTS = $(LIB_SOURCES:$(LIBDIR)/%.c=$(OBJDIR)/%.o)
+SRC_OBJECTS = $(SRC_SOURCES:$(SRCDIR)/%.c=$(OBJDIR)/%.o)
+
+# Target executable
+TARGET = sockets
+
+# Create obj directory if it doesn't exist
+$(shell mkdir -p $(OBJDIR))
+
+# Rules
+all: $(TARGET)
+
+$(TARGET): $(LIB_OBJECTS) $(SRC_OBJECTS)
+	$(CC) $(LIB_OBJECTS) $(SRC_OBJECTS) -o $@ $(LDFLAGS)
+
+$(OBJDIR)/%.o: $(LIBDIR)/%.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+$(OBJDIR)/%.o: $(SRCDIR)/%.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
+clean:
+	rm -f $(OBJDIR)/*.o $(TARGET)
+
+.PHONY: all clean

04_intro_to_sockets/README.md

@@ -0,0 +1,11 @@
+# IO Access
+
+This program demonstrates how to access the GPIO pins on the Raspberry Pi using
+a LED, a button and a temperature sensor.
+
+## Usage
+
+```bash
+$ make
+$ ./io
+```

04_intro_to_sockets/lib/sockets.h

@@ -0,0 +1,5 @@
+#ifndef SOCKETS_LIB_H
+#define SOCKETS_LIB_H
+
+
+#endif // SOCKETS_H

04_intro_to_sockets/src/main.c

@@ -0,0 +1,4 @@
+
+int main() {
+    return 0;
+}

README.md

@@ -1,8 +1,3 @@
 # Distributed Embedded Systems
 
 This repo contains my code for the Distributed Embedded Systems course at the University of Rostock.
-
-```bash
-make
-./io
-```