From 5cf8708d01329e09a411d323dcf07435d63493e1 Mon Sep 17 00:00:00 2001
From: Harvie <tomas@mudrunka.cz>
Date: Mon, 30 Aug 2010 14:45:41 +0200
Subject: [PATCH] Added little C program to pulse Serial line DTR on Linux (can
 reset Arduino)

---
 c/serial-pulse-dtr.c | 35 +++++++++++++++++++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 c/serial-pulse-dtr.c

diff --git a/c/serial-pulse-dtr.c b/c/serial-pulse-dtr.c
new file mode 100644
index 0000000..0809c89
--- /dev/null
+++ b/c/serial-pulse-dtr.c
@@ -0,0 +1,35 @@
+#include <stdio.h>
+#include <fcntl.h>
+#include <asm-generic/ioctls.h>
+#include <unistd.h>
+
+/* Pulse DTR (Harie 2o1o)
+ * This can be used eg.: for reseting Arduino
+ *
+ * make serial-pulse-dtr
+ * ./serial-pulse-dtr /dev/ttyUSB0
+ *
+ * (-; peace ;-)
+ */
+
+int main(int argc, char *argv[]) {
+	if(argc < 2) printf("Usage: %s [/dev/tty*]\n", argv[0]);
+
+	int fd = open(argv[1], O_WRONLY);
+	perror(argv[0]);
+
+	//DTR HIGH
+	//ioctl(fd, TIOCSDTR);
+	ioctl(fd, TIOCMBIS);
+
+	//Wait
+	//system("sleep 0.1");
+	usleep(100000);
+
+	//DTR LOW
+	//ioctl(fd, TIOCCDTR);
+	ioctl(fd, TIOCMBIC);
+
+	close(fd);
+	return 0;
+}
-- 
2.30.2