hid_read method
@brief Read an Input report from a HID device.
Input reports are returned to the host through the INTERRUPT IN endpoint. The first byte will contain the Report number if the device uses numbered reports.
@ingroup API @param dev A device handle returned from hid_open(). @param data A buffer to put the read data into. @param length The number of bytes to read. For devices with multiple reports, make sure to read an extra byte for the report number.
@returns This function returns the actual number of bytes read and -1 on error. Call hid_error(dev) to get the failure reason. If no packet was available to be read and the handle is in non-blocking mode, this function returns 0.
Implementation
int hid_read(
ffi.Pointer<hid_device> dev,
ffi.Pointer<ffi.UnsignedChar> data,
int length,
) {
return _hid_read(
dev,
data,
length,
);
}