diff options
Diffstat (limited to 'libusb/libusb.h')
| -rw-r--r-- | libusb/libusb.h | 35 |
1 files changed, 34 insertions, 1 deletions
diff --git a/libusb/libusb.h b/libusb/libusb.h index a865bc8..ed54d91 100644 --- a/libusb/libusb.h +++ b/libusb/libusb.h @@ -1501,7 +1501,40 @@ enum libusb_option { #define LIBUSB_OPTION_WEAK_AUTHORITY LIBUSB_OPTION_NO_DEVICE_DISCOVERY - LIBUSB_OPTION_MAX = 3 + /** Enable or disable WinUSB RAW_IO mode on an endpoint + * + * Requires four additional arguments of: + * + * libusb_device_handle *dev_handle + * unsigned int endpoint_address + * unsigned int enable + * unsigned int *max_transfer_size_ptr + * + * The dev_handle and endpoint_address parameters must identify a valid + * IN endpoint on an open device. If enable is nonzero, RAW_IO is + * enabled, otherwise it is disabled. Unless max_transfer_size_ptr is + * NULL, then on a successful call to enable RAW_IO, it will be written + * with the MAXIMUM_TRANSFER_SIZE value for the endpoint. + * + * Whilst RAW_IO is enabled for an endpoint, all transfers on that endpoint + * must meet the following two requirements: + * + * * The buffer length must be a multiple of the maximum endpoint packet size. + * + * * The length must be less than or equal to the MAXIMUM_TRANSFER_SIZE value. + * + * This option should not be changed when any transfer is in progress on the + * specified endpoint. + * + * This option only affects the WinUSB backend. On other backends it is ignored + * and returns LIBUSB_OPTION_NOT_SUPPORTED, without modifying the value pointed + * to by max_transfer_size_ptr. + * + * Since version 1.0.27, \ref LIBUSB_API_VERSION >= 0x0100010A + */ + LIBUSB_OPTION_WINUSB_RAW_IO = 3, + + LIBUSB_OPTION_MAX = 4 }; /** \ingroup libusb_lib |