From 034a1e66b8c8ed9f0282b414179874a38d9196d1 Mon Sep 17 00:00:00 2001
From: Stefan Ziegler <stefan.ziegler_zst@gmx.de>
Date: Wed, 7 Nov 2018 23:18:44 +0100
Subject: Anpassung Demo-Programme und Vorträge
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---
 content/demo-programme/ppraider.c | 108 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 content/demo-programme/ppraider.c

(limited to 'content/demo-programme/ppraider.c')

diff --git a/content/demo-programme/ppraider.c b/content/demo-programme/ppraider.c
new file mode 100644
index 0000000..20288c7
--- /dev/null
+++ b/content/demo-programme/ppraider.c
@@ -0,0 +1,108 @@
+/*
+  alle datenpins der reihe nach setzen via parport
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/ioctl.h>
+
+#include <linux/parport.h>
+#include <linux/ppdev.h>
+
+
+#define DEVICE   "/dev/parport0"
+
+static char *RCSID __attribute__ ((unused))  =
+    "$Id: ppraider.c,v 1.1 2006/03/19 15:33:54 walter Exp walter $";
+
+
+#define SHOW(st,bits)    printf(#bits" %s\n", ( st & bits) ?"on":"off")
+
+
+int xopenport(char *name, int fdmode)
+{
+	static int fd;
+	int mode;
+
+
+	mode = O_WRONLY | O_NOCTTY;
+	fd = open(name, mode);
+
+	if (fd == -1) {
+		perror("open");
+		exit(EXIT_FAILURE);
+	}
+
+
+
+	if (ioctl(fd, PPCLAIM)) {
+		perror("PPCLAIM");
+		close(fd);
+		exit(EXIT_FAILURE);
+	}
+	mode = IEEE1284_MODE_COMPAT;
+
+	if (ioctl(fd, PPNEGOT, &mode)) {
+		perror("PPNEGOT");
+		close(fd);
+		exit(EXIT_FAILURE);
+	}
+	return fd;
+}
+
+ /* release port close(fd), ignore errors */
+void xcloseport(int fd)
+{
+	ioctl(fd, PPRELEASE);
+	close(fd);
+}
+
+
+void xset_data(int fd, int data)
+{
+	int ret;
+	ret = ioctl(fd, PPWDATA, &data);
+	if (!ret)
+		return;
+	fprintf(stderr, "%s failed:%s\n", __func__, strerror(errno));
+	exit(EXIT_FAILURE);
+}
+
+
+ /* get status info */
+ /* clean up later */
+void xget_status(int fd, unsigned char *foo)
+{
+	int ret;
+	unsigned char status;
+	ret = ioctl(fd, PPRSTATUS, &status);
+	if (!ret) {
+		*foo = status;
+		return;
+
+	}
+	fprintf(stderr, "%s failed:%s\n", __func__, strerror(errno));
+	exit(EXIT_FAILURE);
+}
+
+
+int main()
+{
+  int i,fd;
+	fd = xopenport(DEVICE, 0);
+
+
+	for (i = 0; i < 8; i++) {
+		xset_data(fd, 1 << i);
+		usleep(500000);
+	}
+
+	xset_data(fd, 0);
+	xcloseport(fd);
+
+	return 0;
+}
-- 
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