mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-11-18 06:11:46 -05:00
388 lines
13 KiB
C
388 lines
13 KiB
C
/*******************************************************
|
|
HIDAPI - Multi-Platform library for
|
|
communication with HID devices.
|
|
|
|
Alan Ott
|
|
Signal 11 Software
|
|
|
|
8/22/2009
|
|
|
|
Copyright 2009, All Rights Reserved.
|
|
|
|
At the discretion of the user of this library,
|
|
this software may be licensed under the terms of the
|
|
GNU General Public License v3, a BSD-Style license, or the
|
|
original HIDAPI license as outlined in the LICENSE.txt,
|
|
LICENSE-gpl3.txt, LICENSE-bsd.txt, and LICENSE-orig.txt
|
|
files located at the root of the source distribution.
|
|
These files may also be found in the public source
|
|
code repository located at:
|
|
http://github.com/signal11/hidapi .
|
|
********************************************************/
|
|
|
|
/** @file
|
|
* @defgroup API hidapi API
|
|
*/
|
|
|
|
#ifndef HIDAPI_H__
|
|
#define HIDAPI_H__
|
|
|
|
#include <wchar.h>
|
|
|
|
#ifdef _WIN32
|
|
#define HID_API_EXPORT __declspec(dllexport)
|
|
#define HID_API_CALL
|
|
#else
|
|
#define HID_API_EXPORT /**< API export macro */
|
|
#define HID_API_CALL /**< API call macro */
|
|
#endif
|
|
|
|
#define HID_API_EXPORT_CALL HID_API_EXPORT HID_API_CALL /**< API export and call macro*/
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
struct hid_device_;
|
|
typedef struct hid_device_ hid_device; /**< opaque hidapi structure */
|
|
|
|
/** hidapi info structure */
|
|
struct hid_device_info {
|
|
/** Platform-specific device path */
|
|
char *path;
|
|
/** Device Vendor ID */
|
|
unsigned short vendor_id;
|
|
/** Device Product ID */
|
|
unsigned short product_id;
|
|
/** Serial Number */
|
|
wchar_t *serial_number;
|
|
/** Device Release Number in binary-coded decimal,
|
|
also known as Device Version Number */
|
|
unsigned short release_number;
|
|
/** Manufacturer String */
|
|
wchar_t *manufacturer_string;
|
|
/** Product string */
|
|
wchar_t *product_string;
|
|
/** Usage Page for this Device/Interface
|
|
(Windows/Mac only). */
|
|
unsigned short usage_page;
|
|
/** Usage for this Device/Interface
|
|
(Windows/Mac only).*/
|
|
unsigned short usage;
|
|
/** The USB interface which this logical device
|
|
represents. Valid on both Linux implementations
|
|
in all cases, and valid on the Windows implementation
|
|
only if the device contains more than one interface. */
|
|
int interface_number;
|
|
|
|
/** Pointer to the next device */
|
|
struct hid_device_info *next;
|
|
};
|
|
|
|
|
|
/** @brief Initialize the HIDAPI library.
|
|
|
|
This function initializes the HIDAPI library. Calling it is not
|
|
strictly necessary, as it will be called automatically by
|
|
hid_enumerate() and any of the hid_open_*() functions if it is
|
|
needed. This function should be called at the beginning of
|
|
execution however, if there is a chance of HIDAPI handles
|
|
being opened by different threads simultaneously.
|
|
|
|
@ingroup API
|
|
|
|
@returns
|
|
This function returns 0 on success and -1 on error.
|
|
*/
|
|
int HID_API_EXPORT HID_API_CALL hid_init(void);
|
|
|
|
/** @brief Finalize the HIDAPI library.
|
|
|
|
This function frees all of the static data associated with
|
|
HIDAPI. It should be called at the end of execution to avoid
|
|
memory leaks.
|
|
|
|
@ingroup API
|
|
|
|
@returns
|
|
This function returns 0 on success and -1 on error.
|
|
*/
|
|
int HID_API_EXPORT HID_API_CALL hid_exit(void);
|
|
|
|
/** @brief Enumerate the HID Devices.
|
|
|
|
This function returns a linked list of all the HID devices
|
|
attached to the system which match vendor_id and product_id.
|
|
If @p vendor_id is set to 0 then any vendor matches.
|
|
If @p product_id is set to 0 then any product matches.
|
|
If @p vendor_id and @p product_id are both set to 0, then
|
|
all HID devices will be returned.
|
|
|
|
@ingroup API
|
|
@param vendor_id The Vendor ID (VID) of the types of device
|
|
to open.
|
|
@param product_id The Product ID (PID) of the types of
|
|
device to open.
|
|
|
|
@returns
|
|
This function returns a pointer to a linked list of type
|
|
struct #hid_device, containing information about the HID devices
|
|
attached to the system, or NULL in the case of failure. Free
|
|
this linked list by calling hid_free_enumeration().
|
|
*/
|
|
struct hid_device_info HID_API_EXPORT * HID_API_CALL hid_enumerate(unsigned short vendor_id, unsigned short product_id);
|
|
|
|
/** @brief Free an enumeration Linked List
|
|
|
|
This function frees a linked list created by hid_enumerate().
|
|
|
|
@ingroup API
|
|
@param devs Pointer to a list of struct_device returned from
|
|
hid_enumerate().
|
|
*/
|
|
void HID_API_EXPORT HID_API_CALL hid_free_enumeration(struct hid_device_info *devs);
|
|
|
|
/** @brief Open a HID device using a Vendor ID (VID), Product ID
|
|
(PID) and optionally a serial number.
|
|
|
|
If @p serial_number is NULL, the first device with the
|
|
specified VID and PID is opened.
|
|
|
|
@ingroup API
|
|
@param vendor_id The Vendor ID (VID) of the device to open.
|
|
@param product_id The Product ID (PID) of the device to open.
|
|
@param serial_number The Serial Number of the device to open
|
|
(Optionally NULL).
|
|
|
|
@returns
|
|
This function returns a pointer to a #hid_device object on
|
|
success or NULL on failure.
|
|
*/
|
|
HID_API_EXPORT hid_device * HID_API_CALL hid_open(unsigned short vendor_id, unsigned short product_id, const wchar_t *serial_number);
|
|
|
|
/** @brief Open a HID device by its path name.
|
|
|
|
The path name be determined by calling hid_enumerate(), or a
|
|
platform-specific path name can be used (eg: /dev/hidraw0 on
|
|
Linux).
|
|
|
|
@ingroup API
|
|
@param path The path name of the device to open
|
|
|
|
@returns
|
|
This function returns a pointer to a #hid_device object on
|
|
success or NULL on failure.
|
|
*/
|
|
HID_API_EXPORT hid_device * HID_API_CALL hid_open_path(const char *path);
|
|
|
|
/** @brief Write an Output report to a HID device.
|
|
|
|
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).
|
|
|
|
@ingroup API
|
|
@param device 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 *device, 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.
|
|
|
|
@ingroup API
|
|
@param device 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.
|
|
@param milliseconds timeout in milliseconds or -1 for blocking wait.
|
|
|
|
@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.
|
|
|
|
@ingroup API
|
|
@param device 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. If no packet was available to be read and
|
|
the handle is in non-blocking mode, this function returns 0.
|
|
*/
|
|
int HID_API_EXPORT HID_API_CALL hid_read(hid_device *device, unsigned char *data, size_t length);
|
|
|
|
/** @brief Set the device handle to be non-blocking.
|
|
|
|
In non-blocking mode calls to hid_read() will return
|
|
immediately with a value of 0 if there is no data to be
|
|
read. In blocking mode, hid_read() will wait (block) until
|
|
there is data to read before returning.
|
|
|
|
Nonblocking can be turned on and off at any time.
|
|
|
|
@ingroup API
|
|
@param device A device handle returned from hid_open().
|
|
@param nonblock enable or not the nonblocking reads
|
|
- 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 *device, 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
|
|
in would be 17.
|
|
|
|
@ingroup API
|
|
@param device 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, including
|
|
the report number.
|
|
|
|
@returns
|
|
This function returns the actual number of bytes written and
|
|
-1 on error.
|
|
*/
|
|
int HID_API_EXPORT HID_API_CALL hid_send_feature_report(hid_device *device, const unsigned char *data, size_t length);
|
|
|
|
/** @brief Get a feature report from a HID device.
|
|
|
|
Make sure to set the first byte of @p data[] to the Report
|
|
ID of the report to be read. Make sure to allow space for
|
|
this extra byte in @p data[].
|
|
|
|
@ingroup API
|
|
@param device A device handle returned from hid_open().
|
|
@param data A buffer to put the read data into, including
|
|
the Report ID. Set the first byte of @p data[] to the
|
|
Report ID of the report to be read.
|
|
@param length The number of bytes to read, including an
|
|
extra byte for the report ID. The buffer can be longer
|
|
than the actual report.
|
|
|
|
@returns
|
|
This function returns the number of bytes read and
|
|
-1 on error.
|
|
*/
|
|
int HID_API_EXPORT HID_API_CALL hid_get_feature_report(hid_device *device, unsigned char *data, size_t length);
|
|
|
|
/** @brief Close a HID device.
|
|
|
|
@ingroup API
|
|
@param device A device handle returned from hid_open().
|
|
*/
|
|
void HID_API_EXPORT HID_API_CALL hid_close(hid_device *device);
|
|
|
|
/** @brief Get The Manufacturer String from a HID device.
|
|
|
|
@ingroup API
|
|
@param device A device handle returned from hid_open().
|
|
@param string A wide string buffer to put the data into.
|
|
@param maxlen The length of the buffer in multiples of wchar_t.
|
|
|
|
@returns
|
|
This function returns 0 on success and -1 on error.
|
|
*/
|
|
int HID_API_EXPORT_CALL hid_get_manufacturer_string(hid_device *device, wchar_t *string, size_t maxlen);
|
|
|
|
/** @brief Get The Product String from a HID device.
|
|
|
|
@ingroup API
|
|
@param device A device handle returned from hid_open().
|
|
@param string A wide string buffer to put the data into.
|
|
@param maxlen The length of the buffer in multiples of wchar_t.
|
|
|
|
@returns
|
|
This function returns 0 on success and -1 on error.
|
|
*/
|
|
int HID_API_EXPORT_CALL hid_get_product_string(hid_device *device, wchar_t *string, size_t maxlen);
|
|
|
|
/** @brief Get The Serial Number String from a HID device.
|
|
|
|
@ingroup API
|
|
@param device A device handle returned from hid_open().
|
|
@param string A wide string buffer to put the data into.
|
|
@param maxlen The length of the buffer in multiples of wchar_t.
|
|
|
|
@returns
|
|
This function returns 0 on success and -1 on error.
|
|
*/
|
|
int HID_API_EXPORT_CALL hid_get_serial_number_string(hid_device *device, wchar_t *string, size_t maxlen);
|
|
|
|
/** @brief Get a string from a HID device, based on its string index.
|
|
|
|
@ingroup API
|
|
@param device A device handle returned from hid_open().
|
|
@param string_index The index of the string to get.
|
|
@param string A wide string buffer to put the data into.
|
|
@param maxlen The length of the buffer in multiples of wchar_t.
|
|
|
|
@returns
|
|
This function returns 0 on success and -1 on error.
|
|
*/
|
|
int HID_API_EXPORT_CALL hid_get_indexed_string(hid_device *device, int string_index, wchar_t *string, size_t maxlen);
|
|
|
|
/** @brief Get a string describing the last error which occurred.
|
|
|
|
@ingroup API
|
|
@param device A device handle returned from hid_open().
|
|
|
|
@returns
|
|
This function returns a string containing the last error
|
|
which occurred or NULL if none has occurred.
|
|
*/
|
|
HID_API_EXPORT const wchar_t* HID_API_CALL hid_error(hid_device *device);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|
|
|