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deps/hidapi/hidapi/hidapi.h  view on Meta::CPAN

			The first byte of @p data[] must contain the Report ID. For
			devices which only support a single report, this must be set
			to 0x0. The remaining bytes contain the report data. Since
			the Report ID is mandatory, calls to hid_write() will always
			contain one more byte than the report contains. For example,
			if a hid report is 16 bytes long, 17 bytes must be passed to
			hid_write(), the Report ID (or 0x0, for devices with a
			single report), followed by the report data (16 bytes). In
			this example, the length passed in would be 17.

			hid_write() will send the data on the first OUT endpoint, if
			one exists. If it does not, it will send the data through
			the Control Endpoint (Endpoint 0).

			This function sets the return value of hid_error().

			@ingroup API
			@param dev A device handle returned from hid_open().
			@param data The data to send, including the report number as
				the first byte.
			@param length The length in bytes of the data to send.

			@returns
				This function returns the actual number of bytes written and
				-1 on error.
		*/
		int  HID_API_EXPORT HID_API_CALL hid_write(hid_device *dev, const unsigned char *data, size_t length);

		/** @brief Read an Input report from a HID device with timeout.

			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.

			This function sets the return value of hid_error().

			@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.

deps/hidapi/hidapi/hidapi.h  view on Meta::CPAN

			@returns
				This function returns the actual number of bytes read and
				-1 on error. If no packet was available to be read within
				the timeout period, this function returns 0.
		*/
		int HID_API_EXPORT HID_API_CALL hid_read_timeout(hid_device *dev, unsigned char *data, size_t length, int milliseconds);

		/** @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.

			This function sets the return value of hid_error().

			@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.

deps/hidapi/hidapi/hidapi.h  view on Meta::CPAN

			 - 1 to enable nonblocking
			 - 0 to disable nonblocking.

			@returns
				This function returns 0 on success and -1 on error.
		*/
		int  HID_API_EXPORT HID_API_CALL hid_set_nonblocking(hid_device *dev, int nonblock);

		/** @brief Send a Feature report to the device.

			Feature reports are sent over the Control endpoint as a
			Set_Report transfer.  The first byte of @p data[] must
			contain the Report ID. For devices which only support a
			single report, this must be set to 0x0. The remaining bytes
			contain the report data. Since the Report ID is mandatory,
			calls to hid_send_feature_report() will always contain one
			more byte than the report contains. For example, if a hid
			report is 16 bytes long, 17 bytes must be passed to
			hid_send_feature_report(): the Report ID (or 0x0, for
			devices which do not use numbered reports), followed by the
			report data (16 bytes). In this example, the length passed

deps/hidapi/libusb/hid.c  view on Meta::CPAN

	size_t len;
	struct input_report *next;
};


struct hid_device_ {
	/* Handle to the actual device. */
	libusb_device_handle *device_handle;

	/* Endpoint information */
	int input_endpoint;
	int output_endpoint;
	int input_ep_max_packet_size;

	/* The interface number of the HID */
	int interface;

	/* Indexes of Strings */
	int manufacturer_index;
	int product_index;
	int serial_index;

deps/hidapi/libusb/hid.c  view on Meta::CPAN

{
	hid_device *dev = param;
	uint8_t *buf;
	const size_t length = dev->input_ep_max_packet_size;

	/* Set up the transfer object. */
	buf = (uint8_t*) malloc(length);
	dev->transfer = libusb_alloc_transfer(0);
	libusb_fill_interrupt_transfer(dev->transfer,
		dev->device_handle,
		dev->input_endpoint,
		buf,
		length,
		read_callback,
		dev,
		5000/*timeout*/);

	/* Make the first submission. Further submissions are made
	   from inside read_callback() */
	libusb_submit_transfer(dev->transfer);

deps/hidapi/libusb/hid.c  view on Meta::CPAN

						}

						/* Store off the string descriptor indexes */
						dev->manufacturer_index = desc.iManufacturer;
						dev->product_index      = desc.iProduct;
						dev->serial_index       = desc.iSerialNumber;

						/* Store off the interface number */
						dev->interface = intf_desc->bInterfaceNumber;

						/* Find the INPUT and OUTPUT endpoints. An
						   OUTPUT endpoint is not required. */
						for (i = 0; i < intf_desc->bNumEndpoints; i++) {
							const struct libusb_endpoint_descriptor *ep
								= &intf_desc->endpoint[i];

							/* Determine the type and direction of this
							   endpoint. */
							int is_interrupt =
								(ep->bmAttributes & LIBUSB_TRANSFER_TYPE_MASK)
							      == LIBUSB_TRANSFER_TYPE_INTERRUPT;
							int is_output =
								(ep->bEndpointAddress & LIBUSB_ENDPOINT_DIR_MASK)
							      == LIBUSB_ENDPOINT_OUT;
							int is_input =
								(ep->bEndpointAddress & LIBUSB_ENDPOINT_DIR_MASK)
							      == LIBUSB_ENDPOINT_IN;

							/* Decide whether to use it for input or output. */
							if (dev->input_endpoint == 0 &&
							    is_interrupt && is_input) {
								/* Use this endpoint for INPUT */
								dev->input_endpoint = ep->bEndpointAddress;
								dev->input_ep_max_packet_size = ep->wMaxPacketSize;
							}
							if (dev->output_endpoint == 0 &&
							    is_interrupt && is_output) {
								/* Use this endpoint for OUTPUT */
								dev->output_endpoint = ep->bEndpointAddress;
							}
						}

						pthread_create(&dev->thread, NULL, read_thread, dev);

						/* Wait here for the read thread to be initialized. */
						pthread_barrier_wait(&dev->barrier);

					}
					free(dev_path);

deps/hidapi/libusb/hid.c  view on Meta::CPAN

	int report_number = data[0];
	int skipped_report_id = 0;

	if (report_number == 0x0) {
		data++;
		length--;
		skipped_report_id = 1;
	}


	if (dev->output_endpoint <= 0) {
		/* No interrupt out endpoint. Use the Control Endpoint */
		res = libusb_control_transfer(dev->device_handle,
			LIBUSB_REQUEST_TYPE_CLASS|LIBUSB_RECIPIENT_INTERFACE|LIBUSB_ENDPOINT_OUT,
			0x09/*HID Set_Report*/,
			(2/*HID output*/ << 8) | report_number,
			dev->interface,
			(unsigned char *)data, length,
			1000/*timeout millis*/);

		if (res < 0)
			return -1;

		if (skipped_report_id)
			length++;

		return length;
	}
	else {
		/* Use the interrupt out endpoint */
		int actual_length;
		res = libusb_interrupt_transfer(dev->device_handle,
			dev->output_endpoint,
			(unsigned char*)data,
			length,
			&actual_length, 1000);

		if (res < 0)
			return -1;

		if (skipped_report_id)
			actual_length++;

deps/hidapi/libusb/hid.c  view on Meta::CPAN

	pthread_mutex_unlock(&dev->mutex);
}


int HID_API_EXPORT hid_read_timeout(hid_device *dev, unsigned char *data, size_t length, int milliseconds)
{
	int bytes_read = -1;

#if 0
	int transferred;
	int res = libusb_interrupt_transfer(dev->device_handle, dev->input_endpoint, data, length, &transferred, 5000);
	LOG("transferred: %d\n", transferred);
	return transferred;
#endif

	pthread_mutex_lock(&dev->mutex);
	pthread_cleanup_push(&cleanup_mutex, dev);

	/* There's an input report queued up. Return it. */
	if (dev->input_reports) {
		/* Return the first one */