Hardware: steering wheel and pedals?

[cuckoo]

I'm also trying to get the Logitech Driving Force Pro to allow a steering angle of 900 degrees using libusb under Linux. Following eckzow's hints I came up with this piece of code:

Code:

#include <stdio>
#include <usb>
#include <time>

clock_t start, end;
double cpu_time_used;

int main(int argc, char **argv) {
  struct usb_bus *busses;

  usb_init();
  usb_find_busses();
  usb_find_devices();

  busses = usb_get_busses();

  struct usb_dev_handle* usb_handle;
  struct usb_bus *bus;
  int c, i, a;
  char buf[] = { 0xf8, 0x81, 0x84, 0x03, 0x00, 0x00, 0x00 };
  char* ptr = buf;
  for (bus = busses; bus; bus = bus->next) {
    struct usb_device *dev;

    for (dev = bus->devices; dev; dev = dev->next) {

       if ((dev->descriptor.idVendor == 0x046d) && (dev->descriptor.idProduct == 0xc294)) {
         int i,stat;

         printf("vendor: %i\n",dev->descriptor.idVendor);

         usb_handle = usb_open(dev);
         printf("Device opened\n"); fflush(stdout);

         stat = usb_detach_kernel_driver_np(usb_handle, 0);
         printf ("releasing kernel driver: %i\n",stat); fflush(stdout);

         stat = usb_claim_interface(usb_handle, 0);
         printf ("stat:%d from claim\n",stat); fflush(stdout);

         i=usb_interrupt_write(usb_handle, 1, buf, sizeof(buf), 10);
         printf("write: %d\n",i);

         getchar();

         stat = usb_release_interface(usb_handle, 0);
         printf("Device released: %i\n", stat); fflush(stdout);

         stat = usb_close(usb_handle);
         printf("Device closed: %i\n", stat); fflush(stdout);
      }
    }
  }
  return 0;
}

Most of the time, the code seems to be able to send the character array to the device, and exits normally, but the maximum steering angle doesn't change.
Sometimes the line usb_find_busses(); makes the steering wheel reinitialize itself as if the usb cable was disconnected and then reconnected. I haven't figured out yet under what circumstances that happens.