diff options
Diffstat (limited to 'Projects/Magstripe/Magstripe.c')
-rw-r--r-- | Projects/Magstripe/Magstripe.c | 432 |
1 files changed, 216 insertions, 216 deletions
diff --git a/Projects/Magstripe/Magstripe.c b/Projects/Magstripe/Magstripe.c index 39149b480..6dbceb6e5 100644 --- a/Projects/Magstripe/Magstripe.c +++ b/Projects/Magstripe/Magstripe.c @@ -1,216 +1,216 @@ -/*
- LUFA Library
- Copyright (C) Dean Camera, 2010.
-
- dean [at] fourwalledcubicle [dot] com
- www.fourwalledcubicle.com
-*/
-
-/*
- Copyright 2010 Denver Gingerich (denver [at] ossguy [dot] com)
- Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com)
-
- Permission to use, copy, modify, distribute, and sell this
- software and its documentation for any purpose is hereby granted
- without fee, provided that the above copyright notice appear in
- all copies and that both that the copyright notice and this
- permission notice and warranty disclaimer appear in supporting
- documentation, and that the name of the author not be used in
- advertising or publicity pertaining to distribution of the
- software without specific, written prior permission.
-
- The author disclaim all warranties with regard to this
- software, including all implied warranties of merchantability
- and fitness. In no event shall the author be liable for any
- special, indirect or consequential damages or any damages
- whatsoever resulting from loss of use, data or profits, whether
- in an action of contract, negligence or other tortious action,
- arising out of or in connection with the use or performance of
- this software.
-*/
-
-/** \file
- *
- * Main source file for the MagStripe reader program. This file contains the main tasks of
- * the project and is responsible for the initial application hardware configuration.
- */
-
-#include "Magstripe.h"
-
-/** Bit buffers to hold the read bits for each of the three magnetic card tracks before they are transmitted
- * to the host as keyboard presses.
- */
-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.
- */
-USB_ClassInfo_HID_Device_t Keyboard_HID_Interface =
- {
- .Config =
- {
- .InterfaceNumber = 0,
-
- .ReportINEndpointNumber = KEYBOARD_EPNUM,
- .ReportINEndpointSize = KEYBOARD_EPSIZE,
- .ReportINEndpointDoubleBank = KEYBOARD_EPSIZE,
-
- .PrevReportINBuffer = PrevKeyboardHIDReportBuffer,
- .PrevReportINBufferSize = sizeof(PrevKeyboardHIDReportBuffer),
- },
- };
-
-/** Main program entry point. This routine contains the overall program flow, including initial
- * setup of all components and the main program loop.
- */
-int main(void)
-{
- SetupHardware();
-
- for (uint8_t Buffer = 0; Buffer < TOTAL_TRACKS; Buffer++)
- BitBuffer_Init(&TrackDataBuffers[Buffer]);
-
- sei();
-
- for (;;)
- {
- if (Magstripe_GetStatus() & MAG_CARDPRESENT)
- ReadMagstripeData();
-
- HID_Device_USBTask(&Keyboard_HID_Interface);
- USB_USBTask();
- }
-}
-
-/** Configures the board hardware and chip peripherals for the demo's functionality. */
-void SetupHardware(void)
-{
- /* Disable watchdog if enabled by bootloader/fuses */
- MCUSR &= ~(1 << WDRF);
- wdt_disable();
-
- /* Disable clock division */
- clock_prescale_set(clock_div_1);
-
- /* Hardware Initialization */
- Magstripe_Init();
- USB_Init();
-}
-
-/** Determines if a card has been inserted, and if so reads in each track's contents into the bit buffers
- * until they are read out to the host as a series of keyboard presses.
- */
-void ReadMagstripeData(void)
-{
- /* Arrays to hold the buffer pointers, clock and data bit masks for the separate card tracks */
- const struct
- {
- uint8_t ClockMask;
- uint8_t DataMask;
- } TrackInfo[] = {{MAG_T1_CLOCK, MAG_T1_DATA},
- {MAG_T2_CLOCK, MAG_T2_DATA},
- {MAG_T3_CLOCK, MAG_T3_DATA}};
-
- uint8_t Magstripe_Prev = 0;
- uint8_t Magstripe_LCL = Magstripe_GetStatus();
-
- while (Magstripe_LCL & MAG_CARDPRESENT)
- {
- for (uint8_t Track = 0; Track < TOTAL_TRACKS; Track++)
- {
- bool DataPinLevel = ((Magstripe_LCL & TrackInfo[Track].DataMask) != 0);
- bool ClockPinLevel = ((Magstripe_LCL & TrackInfo[Track].ClockMask) != 0);
- bool ClockLevelChanged = (((Magstripe_LCL ^ Magstripe_Prev) & TrackInfo[Track].ClockMask) != 0);
-
- /* Sample data on rising clock edges from the card reader */
- if (ClockPinLevel && ClockLevelChanged)
- BitBuffer_StoreNextBit(&TrackDataBuffers[Track], DataPinLevel);
- }
-
- Magstripe_Prev = Magstripe_LCL;
- Magstripe_LCL = Magstripe_GetStatus();
- }
-
- CurrentTrackBuffer = &TrackDataBuffers[0];
-}
-
-/** Event handler for the library USB Configuration Changed event. */
-void EVENT_USB_Device_ConfigurationChanged(void)
-{
- HID_Device_ConfigureEndpoints(&Keyboard_HID_Interface);
-
- USB_Device_EnableSOFEvents();
-}
-
-/** Event handler for the library USB Unhandled Control Packet event. */
-void EVENT_USB_Device_UnhandledControlRequest(void)
-{
- HID_Device_ProcessControlRequest(&Keyboard_HID_Interface);
-}
-
-/** Event handler for the USB device Start Of Frame event. */
-void EVENT_USB_Device_StartOfFrame(void)
-{
- HID_Device_MillisecondElapsed(&Keyboard_HID_Interface);
-}
-
-/** HID class driver callback function for the creation of HID reports to the host.
- *
- * \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[in] ReportType Type of the report to create, either REPORT_ITEM_TYPE_In or REPORT_ITEM_TYPE_Feature
- * \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 Boolean true to force the sending of the report, false to let the library determine if it needs to be sent
- */
-bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID,
- const uint8_t ReportType, void* ReportData, uint16_t* ReportSize)
-{
- USB_KeyboardReport_Data_t* KeyboardReport = (USB_KeyboardReport_Data_t*)ReportData;
-
- static bool IsKeyReleaseReport;
-
- /* Key reports must be interleaved with key release reports, or repeated keys will be ignored */
- IsKeyReleaseReport = !IsKeyReleaseReport;
-
- if ((IsKeyReleaseReport) || (CurrentTrackBuffer == &TrackDataBuffers[TOTAL_TRACKS]))
- {
- /* No more data to send, or key release report between key presses */
- KeyboardReport->KeyCode[0] = KEY_NONE;
- }
- else if (!(CurrentTrackBuffer->Elements))
- {
- /* End of current track, send an enter press and change to the next track's buffer */
- KeyboardReport->KeyCode[0] = KEY_ENTER;
- CurrentTrackBuffer++;
- }
- else
- {
- /* Still data in the current track; convert next bit to a 1 or 0 keypress */
- KeyboardReport->KeyCode[0] = BitBuffer_GetNextBit(CurrentTrackBuffer) ? KEY_1 : KEY_0;
- }
-
- *ReportSize = sizeof(USB_KeyboardReport_Data_t);
- return false;
-}
-
-/** HID Class driver callback function for the processing of a received HID report from the host.
- *
- * \param[in] HIDInterfaceInfo Pointer to the HID interface structure for the HID interface being referenced
- * \param[in] ReportID Report ID of the received report from the host
- * \param[in] ReportData Pointer to the report buffer where the received report is stored
- * \param[in] ReportSize Size in bytes of the report received from the host
- */
-void CALLBACK_HID_Device_ProcessHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, const uint8_t ReportID,
- const void* ReportData, const uint16_t ReportSize)
-{
- // Unused (but mandatory for the HID class driver) in this demo, since there are no Host->Device reports
-}
+/* + LUFA Library + Copyright (C) Dean Camera, 2010. + + dean [at] fourwalledcubicle [dot] com + www.fourwalledcubicle.com +*/ + +/* + Copyright 2010 Denver Gingerich (denver [at] ossguy [dot] com) + Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + Permission to use, copy, modify, distribute, and sell this + software and its documentation for any purpose is hereby granted + without fee, provided that the above copyright notice appear in + all copies and that both that the copyright notice and this + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the + software without specific, written prior permission. + + The author disclaim all warranties with regard to this + software, including all implied warranties of merchantability + and fitness. In no event shall the author be liable for any + special, indirect or consequential damages or any damages + whatsoever resulting from loss of use, data or profits, whether + in an action of contract, negligence or other tortious action, + arising out of or in connection with the use or performance of + this software. +*/ + +/** \file + * + * Main source file for the MagStripe reader program. This file contains the main tasks of + * the project and is responsible for the initial application hardware configuration. + */ + +#include "Magstripe.h" + +/** Bit buffers to hold the read bits for each of the three magnetic card tracks before they are transmitted + * to the host as keyboard presses. + */ +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. + */ +USB_ClassInfo_HID_Device_t Keyboard_HID_Interface = + { + .Config = + { + .InterfaceNumber = 0, + + .ReportINEndpointNumber = KEYBOARD_EPNUM, + .ReportINEndpointSize = KEYBOARD_EPSIZE, + .ReportINEndpointDoubleBank = KEYBOARD_EPSIZE, + + .PrevReportINBuffer = PrevKeyboardHIDReportBuffer, + .PrevReportINBufferSize = sizeof(PrevKeyboardHIDReportBuffer), + }, + }; + +/** Main program entry point. This routine contains the overall program flow, including initial + * setup of all components and the main program loop. + */ +int main(void) +{ + SetupHardware(); + + for (uint8_t Buffer = 0; Buffer < TOTAL_TRACKS; Buffer++) + BitBuffer_Init(&TrackDataBuffers[Buffer]); + + sei(); + + for (;;) + { + if (Magstripe_GetStatus() & MAG_CARDPRESENT) + ReadMagstripeData(); + + HID_Device_USBTask(&Keyboard_HID_Interface); + USB_USBTask(); + } +} + +/** Configures the board hardware and chip peripherals for the demo's functionality. */ +void SetupHardware(void) +{ + /* Disable watchdog if enabled by bootloader/fuses */ + MCUSR &= ~(1 << WDRF); + wdt_disable(); + + /* Disable clock division */ + clock_prescale_set(clock_div_1); + + /* Hardware Initialization */ + Magstripe_Init(); + USB_Init(); +} + +/** Determines if a card has been inserted, and if so reads in each track's contents into the bit buffers + * until they are read out to the host as a series of keyboard presses. + */ +void ReadMagstripeData(void) +{ + /* Arrays to hold the buffer pointers, clock and data bit masks for the separate card tracks */ + const struct + { + uint8_t ClockMask; + uint8_t DataMask; + } TrackInfo[] = {{MAG_T1_CLOCK, MAG_T1_DATA}, + {MAG_T2_CLOCK, MAG_T2_DATA}, + {MAG_T3_CLOCK, MAG_T3_DATA}}; + + uint8_t Magstripe_Prev = 0; + uint8_t Magstripe_LCL = Magstripe_GetStatus(); + + while (Magstripe_LCL & MAG_CARDPRESENT) + { + for (uint8_t Track = 0; Track < TOTAL_TRACKS; Track++) + { + bool DataPinLevel = ((Magstripe_LCL & TrackInfo[Track].DataMask) != 0); + bool ClockPinLevel = ((Magstripe_LCL & TrackInfo[Track].ClockMask) != 0); + bool ClockLevelChanged = (((Magstripe_LCL ^ Magstripe_Prev) & TrackInfo[Track].ClockMask) != 0); + + /* Sample data on rising clock edges from the card reader */ + if (ClockPinLevel && ClockLevelChanged) + BitBuffer_StoreNextBit(&TrackDataBuffers[Track], DataPinLevel); + } + + Magstripe_Prev = Magstripe_LCL; + Magstripe_LCL = Magstripe_GetStatus(); + } + + CurrentTrackBuffer = &TrackDataBuffers[0]; +} + +/** Event handler for the library USB Configuration Changed event. */ +void EVENT_USB_Device_ConfigurationChanged(void) +{ + HID_Device_ConfigureEndpoints(&Keyboard_HID_Interface); + + USB_Device_EnableSOFEvents(); +} + +/** Event handler for the library USB Unhandled Control Packet event. */ +void EVENT_USB_Device_UnhandledControlRequest(void) +{ + HID_Device_ProcessControlRequest(&Keyboard_HID_Interface); +} + +/** Event handler for the USB device Start Of Frame event. */ +void EVENT_USB_Device_StartOfFrame(void) +{ + HID_Device_MillisecondElapsed(&Keyboard_HID_Interface); +} + +/** HID class driver callback function for the creation of HID reports to the host. + * + * \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[in] ReportType Type of the report to create, either REPORT_ITEM_TYPE_In or REPORT_ITEM_TYPE_Feature + * \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 Boolean true to force the sending of the report, false to let the library determine if it needs to be sent + */ +bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID, + const uint8_t ReportType, void* ReportData, uint16_t* ReportSize) +{ + USB_KeyboardReport_Data_t* KeyboardReport = (USB_KeyboardReport_Data_t*)ReportData; + + static bool IsKeyReleaseReport; + + /* Key reports must be interleaved with key release reports, or repeated keys will be ignored */ + IsKeyReleaseReport = !IsKeyReleaseReport; + + if ((IsKeyReleaseReport) || (CurrentTrackBuffer == &TrackDataBuffers[TOTAL_TRACKS])) + { + /* No more data to send, or key release report between key presses */ + KeyboardReport->KeyCode[0] = KEY_NONE; + } + else if (!(CurrentTrackBuffer->Elements)) + { + /* End of current track, send an enter press and change to the next track's buffer */ + KeyboardReport->KeyCode[0] = KEY_ENTER; + CurrentTrackBuffer++; + } + else + { + /* Still data in the current track; convert next bit to a 1 or 0 keypress */ + KeyboardReport->KeyCode[0] = BitBuffer_GetNextBit(CurrentTrackBuffer) ? KEY_1 : KEY_0; + } + + *ReportSize = sizeof(USB_KeyboardReport_Data_t); + return false; +} + +/** HID Class driver callback function for the processing of a received HID report from the host. + * + * \param[in] HIDInterfaceInfo Pointer to the HID interface structure for the HID interface being referenced + * \param[in] ReportID Report ID of the received report from the host + * \param[in] ReportData Pointer to the report buffer where the received report is stored + * \param[in] ReportSize Size in bytes of the report received from the host + */ +void CALLBACK_HID_Device_ProcessHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, const uint8_t ReportID, + const void* ReportData, const uint16_t ReportSize) +{ + // Unused (but mandatory for the HID class driver) in this demo, since there are no Host->Device reports +} |