1 files changed, 63 insertions, 0 deletions
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;
+}