hidd_get_protocol()
Get the device protocol
Synopsis:
#include <sys/hiddi.h>
int hidd_get_protocol( struct hidd_connection *connection,
struct hidd_device_instance *device_instance,
_Uint8t *protocol );Arguments:
- connection
-
The HID stack connection handle (from hidd_connect()).
- device_instance
-
A pointer to a hidd_device_instance_t instance containing the number of the device.
- protocol
-
A pointer to memory where to store the device protocol. After a successful return, protocol contains either HID_PROTOCOL_BOOT (
0) or HID_PROTOCOL_REPORT (1).
Description:
The hidd_get_protocol() function checks if a device is using a report or boot protocol.
Returns:
- EOK
- Success.
- ENOTCONN
- The connection is NULL.
- EINVAL
- The device_instance is NULL.
- ENODEV
- The device was removed.
- ENOTSUP
- The device doesn't support getting the protocol.
This function can also return a device-specific error code.
Classification:
QNX OS
| Safety: | |
|---|---|
| Cancellation point | Yes |
| Signal handler | No |
| Thread | Yes |
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