/** Bit buffers to hold the read bits for each of the three magnetic card tracks before they are transmitted\r
* to the host as keyboard presses.\r
*/\r
-BitBuffer_t TrackDataBuffers[3];\r
+BitBuffer_t TrackDataBuffers[TOTAL_TRACKS];\r
+\r
+/** Pointer to the current track buffer being sent to the host. */\r
+BitBuffer_t* CurrentTrackBuffer = &TrackDataBuffers[TOTAL_TRACKS];\r
+\r
+/** Buffer to hold the previously generated Keyboard HID report, for comparison purposes inside the HID class driver. */\r
+uint8_t PrevKeyboardHIDReportBuffer[sizeof(USB_KeyboardReport_Data_t)];\r
\r
/** LUFA HID Class driver interface configuration and state information. This structure is\r
* passed to all HID Class driver functions, so that multiple instances of the same class\r
\r
.ReportINEndpointNumber = KEYBOARD_EPNUM,\r
.ReportINEndpointSize = KEYBOARD_EPSIZE,\r
- \r
- .ReportINBufferSize = sizeof(USB_KeyboardReport_Data_t),\r
+\r
+ .PrevReportINBuffer = PrevKeyboardHIDReportBuffer,\r
+ .PrevReportINBufferSize = sizeof(PrevKeyboardHIDReportBuffer),\r
},\r
- \r
- .State =\r
- {\r
- // Leave all state values to their defaults \r
- }\r
};\r
\r
/** Main program entry point. This routine contains the overall program flow, including initial\r
{\r
SetupHardware();\r
\r
- for (uint8_t Buffer = 0; Buffer < 3; Buffer++)\r
+ for (uint8_t Buffer = 0; Buffer < TOTAL_TRACKS; Buffer++)\r
BitBuffer_Init(&TrackDataBuffers[Buffer]);\r
\r
for (;;)\r
/* Hardware Initialization */\r
Magstripe_Init();\r
USB_Init();\r
-\r
- /* Millisecond timer initialization, with output compare interrupt enabled for the idle timing */\r
- OCR0A = ((F_CPU / 64) / 1000);\r
- TCCR0A = (1 << WGM01);\r
- TCCR0B = ((1 << CS01) | (1 << CS00));\r
- TIMSK0 = (1 << OCIE0A);\r
}\r
\r
/** Determines if a card has been inserted, and if so reads in each track's contents into the bit buffers\r
\r
while (Magstripe_LCL & MAG_CARDPRESENT)\r
{\r
- for (uint8_t Track = 0; Track < 3; Track++)\r
+ for (uint8_t Track = 0; Track < TOTAL_TRACKS; Track++)\r
{\r
bool DataPinLevel = ((Magstripe_LCL & TrackInfo[Track].DataMask) != 0);\r
bool ClockPinLevel = ((Magstripe_LCL & TrackInfo[Track].ClockMask) != 0);\r
bool ClockLevelChanged = (((Magstripe_LCL ^ Magstripe_Prev) & TrackInfo[Track].ClockMask) != 0);\r
\r
+ /* Sample data on rising clock edges from the card reader */\r
if (ClockPinLevel && ClockLevelChanged)\r
BitBuffer_StoreNextBit(&TrackDataBuffers[Track], DataPinLevel);\r
}\r
Magstripe_Prev = Magstripe_LCL;\r
Magstripe_LCL = Magstripe_GetStatus();\r
}\r
+ \r
+ CurrentTrackBuffer = &TrackDataBuffers[0];\r
}\r
\r
/** Event handler for the library USB Configuration Changed event. */\r
-void EVENT_USB_ConfigurationChanged(void)\r
+void EVENT_USB_Device_ConfigurationChanged(void)\r
{\r
HID_Device_ConfigureEndpoints(&Keyboard_HID_Interface);\r
+ \r
+ USB_Device_EnableSOFEvents();\r
}\r
\r
/** Event handler for the library USB Unhandled Control Packet event. */\r
-void EVENT_USB_UnhandledControlPacket(void)\r
+void EVENT_USB_Device_UnhandledControlRequest(void)\r
{\r
- HID_Device_ProcessControlPacket(&Keyboard_HID_Interface);\r
+ HID_Device_ProcessControlRequest(&Keyboard_HID_Interface);\r
}\r
\r
-/** Timer 0 CTC ISR, firing once each millisecond to keep track of elapsed idle time in the HID interface. */\r
-ISR(TIMER0_COMPA_vect, ISR_BLOCK)\r
+/** Event handler for the USB device Start Of Frame event. */\r
+void EVENT_USB_Device_StartOfFrame(void)\r
{\r
- if (Keyboard_HID_Interface.State.IdleMSRemaining)\r
- Keyboard_HID_Interface.State.IdleMSRemaining--;\r
+ HID_Device_MillisecondElapsed(&Keyboard_HID_Interface);\r
}\r
\r
-/** HID Class driver callback function for the creation of a HID report for the host.\r
+/** HID class driver callback function for the creation of HID reports to the host.\r
*\r
- * \param HIDInterfaceInfo Pointer to the HID interface structure for the HID interface being referenced\r
- * \param ReportID Report ID requested by the host if non-zero, otherwise callback should set to the generated report ID\r
- * \param ReportData Pointer to the preallocated report buffer where the created report should be stored\r
+ * \param[in] HIDInterfaceInfo Pointer to the HID class interface configuration structure being referenced\r
+ * \param[in,out] ReportID Report ID requested by the host if non-zero, otherwise callback should set to the generated report ID\r
+ * \param[out] ReportData Pointer to a buffer where the created report should be stored\r
+ * \param[out] ReportSize Number of bytes written in the report (or zero if no report is to be sent\r
*\r
- * \return Number of bytes in the created report\r
+ * \return Boolean true to force the sending of the report, false to let the library determine if it needs to be sent\r
*/\r
-uint16_t CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo, uint8_t* ReportID, void* ReportData)\r
+bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID,\r
+ void* ReportData, uint16_t* ReportSize)\r
{\r
+ USB_KeyboardReport_Data_t* KeyboardReport = (USB_KeyboardReport_Data_t*)ReportData;\r
+\r
static bool IsKeyReleaseReport;\r
- static bool IsNewlineReport;\r
\r
- BitBuffer_t* Buffer = NULL;\r
- USB_KeyboardReport_Data_t* KeyboardReport = (USB_KeyboardReport_Data_t*)ReportData;\r
- \r
- /* Key reports must be interleaved with 0 Key Code reports to release the keys, or repeated keys will be ignored */\r
- IsKeyReleaseReport = !IsKeyReleaseReport; \r
+ /* Key reports must be interleaved with key release reports, or repeated keys will be ignored */\r
+ IsKeyReleaseReport = !IsKeyReleaseReport;\r
\r
- if (IsKeyReleaseReport)\r
+ if ((IsKeyReleaseReport) || (CurrentTrackBuffer == &TrackDataBuffers[TOTAL_TRACKS]))\r
{\r
- KeyboardReport->KeyCode = 0;\r
+ /* No more data to send, or key release report between key presses */\r
+ KeyboardReport->KeyCode = KEY_NONE;\r
}\r
- else if (IsNewlineReport)\r
+ else if (!(CurrentTrackBuffer->Elements))\r
{\r
- IsNewlineReport = false;\r
+ /* End of current track, send an enter press and change to the next track's buffer */\r
KeyboardReport->KeyCode = KEY_ENTER;\r
+ CurrentTrackBuffer++;\r
}\r
else\r
{\r
- if (TrackDataBuffers[0].Elements)\r
- Buffer = &TrackDataBuffers[0];\r
- else if (TrackDataBuffers[1].Elements)\r
- Buffer = &TrackDataBuffers[1]; \r
- else if (TrackDataBuffers[2].Elements)\r
- Buffer = &TrackDataBuffers[2];\r
- else\r
- return 0;\r
-\r
- KeyboardReport->KeyCode = BitBuffer_GetNextBit(Buffer) ? KEY_1 : KEY_0;\r
- \r
- /* If buffer now empty, next report must be a newline to seperate track data */\r
- if (!(Buffer->Elements))\r
- IsNewlineReport = true;\r
+ /* Still data in the current track; convert next bit to a 1 or 0 keypress */\r
+ KeyboardReport->KeyCode = BitBuffer_GetNextBit(CurrentTrackBuffer) ? KEY_1 : KEY_0;\r
}\r
\r
- return sizeof(USB_KeyboardReport_Data_t);\r
+ *ReportSize = sizeof(USB_KeyboardReport_Data_t);\r
+ return false;\r
}\r
\r
/** HID Class driver callback function for the processing of a received HID report from the host.\r
*\r
- * \param HIDInterfaceInfo Pointer to the HID interface structure for the HID interface being referenced\r
- * \param ReportID Report ID of the received report from the host\r
- * \param ReportData Pointer to the report buffer where the received report is stored\r
- * \param ReportSize Size in bytes of the report received from the host\r
+ * \param[in] HIDInterfaceInfo Pointer to the HID interface structure for the HID interface being referenced\r
+ * \param[in] ReportID Report ID of the received report from the host\r
+ * \param[in] ReportData Pointer to the report buffer where the received report is stored\r
+ * \param[in] ReportSize Size in bytes of the report received from the host\r
*/\r
-void CALLBACK_HID_Device_ProcessHIDReport(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo, uint8_t ReportID,\r
- void* ReportData, uint16_t ReportSize)\r
+void CALLBACK_HID_Device_ProcessHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, const uint8_t ReportID,\r
+ const void* ReportData, const uint16_t ReportSize)\r
{\r
// Unused (but mandatory for the HID class driver) in this demo, since there are no Host->Device reports\r
}\r
projects / pub / USBasp.git / blobdiff