diff options
Diffstat (limited to 'Projects/Magstripe/Magstripe.c')
| -rw-r--r-- | Projects/Magstripe/Magstripe.c | 23 |
1 files changed, 16 insertions, 7 deletions
diff --git a/Projects/Magstripe/Magstripe.c b/Projects/Magstripe/Magstripe.c index 6d463d6a8..f0fd8a7d0 100644 --- a/Projects/Magstripe/Magstripe.c +++ b/Projects/Magstripe/Magstripe.c @@ -45,6 +45,9 @@ BitBuffer_t TrackDataBuffers[TOTAL_TRACKS]; /** Pointer to the current track buffer being sent to the host. */
BitBuffer_t* CurrentTrackBuffer = &TrackDataBuffers[TOTAL_TRACKS];
+/** Buffer to hold the previously generated Keyboard HID report, for comparison purposes inside the HID class driver. */
+uint8_t PrevKeyboardHIDReportBuffer[sizeof(USB_KeyboardReport_Data_t)];
+
/** LUFA HID Class driver interface configuration and state information. This structure is
* passed to all HID Class driver functions, so that multiple instances of the same class
* within a device can be differentiated from one another.
@@ -57,6 +60,9 @@ USB_ClassInfo_HID_Device_t Keyboard_HID_Interface = .ReportINEndpointNumber = KEYBOARD_EPNUM,
.ReportINEndpointSize = KEYBOARD_EPSIZE,
+
+ .PrevReportINBuffer = PrevKeyboardHIDReportBuffer,
+ .PrevReportINBufferSize = sizeof(PrevKeyboardHIDReportBuffer),
},
};
@@ -156,15 +162,17 @@ ISR(TIMER0_COMPA_vect, ISR_BLOCK) HID_Device_MillisecondElapsed(&Keyboard_HID_Interface);
}
-/** HID Class driver callback function for the creation of a HID report for the host.
+/** HID class driver callback function for the creation of HID reports to the host.
*
- * \param[in] HIDInterfaceInfo Pointer to the HID interface structure for the HID interface being referenced
- * \param[in,out] ReportID Report ID requested by the host if non-zero, otherwise callback should set to the generated report ID
- * \param[out] ReportData Pointer to the preallocated report buffer where the created report should be stored
+ * \param[in] HIDInterfaceInfo Pointer to the HID class interface configuration structure being referenced
+ * \param[in,out] ReportID Report ID requested by the host if non-zero, otherwise callback should set to the generated report ID
+ * \param[out] ReportData Pointer to a buffer where the created report should be stored
+ * \param[out] ReportSize Number of bytes written in the report (or zero if no report is to be sent
*
- * \return Number of bytes in the created report
+ * \return Boolean true to force the sending of the report, false to let the library determine if it needs to be sent
*/
-uint16_t CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID, void* ReportData)
+bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID,
+ void* ReportData, uint16_t* ReportSize)
{
USB_KeyboardReport_Data_t* KeyboardReport = (USB_KeyboardReport_Data_t*)ReportData;
@@ -190,7 +198,8 @@ uint16_t CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const H KeyboardReport->KeyCode = BitBuffer_GetNextBit(CurrentTrackBuffer) ? KEY_1 : KEY_0;
}
- return sizeof(USB_KeyboardReport_Data_t);
+ *ReportSize = sizeof(USB_KeyboardReport_Data_t);
+ return false;
}
/** HID Class driver callback function for the processing of a received HID report from the host.
|