From c5700a04ea85c045fbd21709a5acbad4864ba369 Mon Sep 17 00:00:00 2001
From: Christian Pointner <equinox@spreadspace.org>
Date: Sun, 20 May 2012 16:03:08 +0000
Subject: added reset program for arduino 10000 and newer

git-svn-id: https://svn.spreadspace.org/avr/trunk@21 aa12f405-d877-488e-9caf-2d797e2a1cc7
---
 tools/Makefile        | 36 +++++++++++++++++++++++++++++
 tools/reset_arduino.c | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 99 insertions(+)
 create mode 100644 tools/Makefile
 create mode 100644 tools/reset_arduino.c

diff --git a/tools/Makefile b/tools/Makefile
new file mode 100644
index 0000000..5887bd4
--- /dev/null
+++ b/tools/Makefile
@@ -0,0 +1,36 @@
+##
+##  spreadspace avr utils
+##
+##
+##  Copyright (C) 2012 Christian Pointner <equinox@spreadspace.org>
+##
+##  This file is part of spreadspace avr utils.
+##
+##  spreadspace avr utils is free software: you can redistribute it and/or modify
+##  it under the terms of the GNU General Public License as published by
+##  the Free Software Foundation, either version 3 of the License, or
+##  any later version.
+##
+##  spreadspace avr utils is distributed in the hope that it will be useful,
+##  but WITHOUT ANY WARRANTY; without even the implied warranty of
+##  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+##  GNU General Public License for more details.
+##
+##  You should have received a copy of the GNU General Public License
+##  along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
+##
+
+TARGETS=reset_arduino
+
+all: $(TARGETS)
+
+reset_arduino: reset_arduino.c
+	$(CC) -o $@ $<
+
+.PHONY: clean
+
+clean:
+	rm -f *.o
+	rm -f *.d
+	rm -f *.d.*
+	rm -f $(TARGETS)
diff --git a/tools/reset_arduino.c b/tools/reset_arduino.c
new file mode 100644
index 0000000..99ace88
--- /dev/null
+++ b/tools/reset_arduino.c
@@ -0,0 +1,63 @@
+/*
+ *  spreadspace avr utils
+ *
+ *
+ *  Copyright (C) 2012 Christian Pointner <equinox@spreadspace.org>
+ *
+ *  This file is part of spreadspace avr utils.
+ *
+ *  spreadspace avr utils is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  any later version.
+ *
+ *  spreadspace avr utils is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with spreadspace avr utils. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <termios.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <time.h>
+#include <stdio.h>
+#include <sys/select.h>
+
+#define STATE_OFF 0
+#define STATE_ON  1
+
+void setDTRState (int fd, int state) {
+  int flags;
+
+  ioctl(fd, TIOCMGET, &flags);
+  flags = (state == STATE_ON ? flags | TIOCM_DTR : flags & ~TIOCM_DTR);
+  ioctl(fd, TIOCMSET, &flags);
+}
+
+int
+main(int argc, char* argv[])
+{
+  char* device = argc < 2 ? "/dev/ttyUSB0" : argv[1];
+  int fd = open(device, O_RDWR);
+  if (fd == 0) {
+    fprintf(stderr, "Could not open %s\n", device);
+    return EXIT_FAILURE;
+  }
+  
+  setDTRState(fd, STATE_ON);
+  struct timeval sleeptime = {0, 100000}; // 100ms
+  select(0, NULL, NULL, NULL, &sleeptime);
+  setDTRState(fd, STATE_OFF);
+  sleeptime.tv_sec = 0;
+  sleeptime.tv_usec = 100000;
+  select(0, NULL, NULL, NULL, &sleeptime);
+  setDTRState(fd, STATE_ON);
+  close(fd);
+
+  return EXIT_SUCCESS;
+}
-- 
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