reset arduino due usb

70-arduino-due.rules

# create symlinks and set permissions on device connection
# /lib/udev/rules.d/70-arduino-due.rules
# update rules with: udevadm control --reload-rules

SUBSYSTEMS=="usb", ATTRS{idProduct}=="003d", ATTRS{idVendor}=="2341", SYMLINK+="arduino_due", MODE="0666"
SUBSYSTEMS=="usb", ATTRS{idProduct}=="003e", ATTRS{idVendor}=="2341", SYMLINK+="arduino_due_host" MODE="0666"

reset-arduino

#!/bin/sh
# ~/arduino/arduino-nightly/bin/reset-arduino
# chmod +x ~/arduino/arduino-nightly/bin/reset-arduino
# echo PATH="~/arduino/arduino-nightly/bin:$PATH" >> ~/.bashrc

lsusb | awk -F':| ' '/2341:003d/ { print "/dev/bus/usb/"$2"/"$4 }' | xargs ~/arduino/arduino-nightly/bin/usb-reset

usb-reset.c

/* usbreset -- send a USB port reset to a USB device 
 * http://askubuntu.com/questions/645/how-do-you-reset-a-usb-device-from-the-command-line
 */

/*
 * gcc -o ~/arduino/arduino-nightly/bin/usb-reset usb-reset.c
 * chmod +x ~/arduino/arduino-nightly/bin/usb-reset
 */

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>

#include <linux/usbdevice_fs.h>


int main(int argc, char **argv)
{
    const char *filename;
    int fd;
    int rc;

    if (argc != 2) {
        fprintf(stderr, "Usage: usbreset device-filename\n");
        return 1;
    }
    filename = argv[1];

    fd = open(filename, O_WRONLY);
    if (fd < 0) {
        perror("Error opening output file");
        return 1;
    }

    printf("Resetting USB device %s\n", filename);
    rc = ioctl(fd, USBDEVFS_RESET, 0);
    if (rc < 0) {
        perror("Error in ioctl");
        return 1;
    }
    printf("Reset successful\n");

    close(fd);
    return 0;
}