diff options
Diffstat (limited to 'LUFA/Drivers/USB/Class/Device/HID.h')
| -rw-r--r-- | LUFA/Drivers/USB/Class/Device/HID.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/LUFA/Drivers/USB/Class/Device/HID.h b/LUFA/Drivers/USB/Class/Device/HID.h index dee892d06..4865a1243 100644 --- a/LUFA/Drivers/USB/Class/Device/HID.h +++ b/LUFA/Drivers/USB/Class/Device/HID.h @@ -77,7 +77,14 @@ void* PrevReportINBuffer; /** Pointer to a buffer where the previously created HID input report can be
* stored by the driver, for comparison purposes to detect report changes that
* must be sent immediately to the host. This should point to a buffer big enough
- * to hold the largest HID input report sent from the HID interface.
+ * to hold the largest HID input report sent from the HID interface. If this is set
+ * to NULL, it is up to the user to force transfers when needed in the
+ * \ref CALLBACK_HID_Device_CreateHIDReport() callback function.
+ *
+ * \note Due to the single buffer, the internal driver can only correctly compare
+ * subsequent reports with identical report IDs. In multiple report devices,
+ * this buffer should be set to NULL and the decision to send reports made
+ * by the user application instead.
*/
uint8_t PrevReportINBufferSize; /** Size in bytes of the given input report buffer. This is used to create a
* second buffer of the same size within the driver so that subsequent reports
|