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Add convenience function to find and open a device by USB VID+PID

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Lots of libusb apps I write are simple test apps not intended to be real
apps. Having a function available to quickly locate my device will be
handy in such situations.
This commit is contained in:
Daniel Drake 2008-03-06 23:43:57 +00:00
parent 9cfdb494fc
commit 23f8fb8baf
3 changed files with 37 additions and 31 deletions
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32
examples/dpfp.c
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@ -81,36 +81,8 @@ static struct libusb_bulk_transfer irqtrf = {
static int find_dpfp_device(void)
{
struct libusb_device *dev;
struct libusb_device *found = NULL;
struct libusb_device **devs;
size_t i = 0;
int r;
r = libusb_get_device_list(&devs);
if (r < 0)
return r;
while ((dev = devs[i++]) != NULL) {
struct libusb_dev_descriptor *desc = libusb_device_get_descriptor(dev);
if (desc->idVendor == 0x05ba && desc->idProduct == 0x000a) {
found = dev;
break;
}
}
if (!found) {
r = -ENODEV;
goto out;
}
devh = libusb_open(dev);
if (!devh)
r = -EIO;
out:
libusb_free_device_list(devs, 1);
return r;
devh = libusb_open_device_with_vid_pid(0x05ba, 0x000a);
return devh ? 0 : -EIO;
}
static int print_f0_data(void)