From 8281c38db8c3949009e907725ca038962b604f84 Mon Sep 17 00:00:00 2001
From: Kienzle <sikienzl@htwg-konstanz.de>
Date: Wed, 29 Mar 2017 11:10:15 +0200
Subject: [PATCH] rename some functions and add some implementations

---
 V1/switch.c | 70 ++++++++++++++++++++++++++++++++++++++++-------------
 1 file changed, 53 insertions(+), 17 deletions(-)

diff --git a/V1/switch.c b/V1/switch.c
index 0ac0d12..b691f98 100644
--- a/V1/switch.c
+++ b/V1/switch.c
@@ -7,14 +7,12 @@
  *  
  *  */
 
-#define PIN01 "1"
-#define PIN12 "12"
-#define PIN11 "11"
-#define PIN06 "6"
+#define BUTTON "17"
 #define IN "in\n"
 #define OUT "out\n"
-#define V33 "1\n"
-#define V0 "0\n"
+#define HIGH "1\n"
+#define LOW "0\n"
+#define MAXBYTES 1
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -49,18 +47,18 @@ int reserve(char* gpioPort)
 	return writeIntoFile(str,"/sys/class/gpio/export");
 }
 
-int inOrOut(char* gpioPort, char* inOut)
+int setDirection(char* gpioPort, char* inOut)
 {
 	char *direc = "/direction";
 	char *gpioPath = "/sys/class/gpio/gpio";	
 	char path[32];
 	strcpy(path, gpioPath);
-        strcat(path, gpioPort);
+    strcat(path, gpioPort);
 	strcat(path, direc);
 	return writeIntoFile(inOut, path);
 }
 
-int voltage(char* gpioPort, char* volt)
+int setOutput(char* gpioPort, char* volt)
 {
 	char *val = "/value";
 	char *gpioPath = "/sys/class/gpio/gpio";
@@ -71,14 +69,52 @@ int voltage(char* gpioPort, char* volt)
 	return writeIntoFile(volt, path);
 }
 
-int main()
+int mainLoop(char* gpioPort)
 {
-  	reserve(PIN06);  
-  	reserve(PIN01);
-	reserve(PIN11);
-	inOrOut(PIN01, OUT);
-	inOrOut(PIN11, IN);
-	voltage(PIN06, V0);
-	voltage(PIN01, V33);
+	int fid, portValue, count, countButton;
+	char *val = "/value";
+	char *gpioPath = "/sys/class/gpio/gpio";
+	char path[28];
+	strcpy(path, gpioPath);
+	strcat(path, gpioPort);
+	strcat(path, val);
+	
+	while(true)
+	{
+		if( (fid=open(path, O_RDONLY)) == -1)
+			perror("Fehler ");
+		if(readInput(fid) == 1)
+		{
+			countButton++;
+			printf("%d", countButton);
+		}
+		
+	
+		close(fid);
+	}
+}
+
+char[] readInput(int fid)
+{
+	char buffer[MAXBYTES];
+	read(fid, &buffer, MAXBYTES);
+	return buffer;
+}
+
+int unexport(char* gpioport)
+{
+	char str[3];
+	strcpy(str, gpioPort);
+	strcat(str, "\n");
+	return writeIntoFile(str,"/sys/class/gpio/unexport");
+}
+
+
+int main()
+{  
+	reserve(BUTTON);
+	setDirection(BUTTON, IN);
+	mainLoop(BUTTON);
+	unexport(BUTTON);
 	return 0;
 }