X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/c75f8bf2236bc69511d0ff0bc79bfaf1f62e3bfd..9aabce09f10431ab76bb8833c0d1effdb224d63f:/Projects/Magstripe/Magstripe.c?ds=inline diff --git a/Projects/Magstripe/Magstripe.c b/Projects/Magstripe/Magstripe.c index 4e26d9b22..85df8b5ea 100644 --- a/Projects/Magstripe/Magstripe.c +++ b/Projects/Magstripe/Magstripe.c @@ -1,213 +1,226 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2009. - - dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com -*/ - -/* - Copyright 2009 Denver Gingerich (denver [at] ossguy [dot] com) - Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - Permission to use, copy, modify, and distribute this software - and its documentation for any purpose and without fee is hereby - granted, 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[3]; - -/** 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 = - { - .InterfaceNumber = 0, - - .ReportINEndpointNumber = KEYBOARD_EPNUM, - .ReportINEndpointSize = KEYBOARD_EPSIZE, - - .ReportINBufferSize = sizeof(USB_KeyboardReport_Data_t), - }; - -/** 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 < 3; Buffer++) - BitBuffer_Init(&TrackDataBuffers[Buffer]); - - for (;;) - { - if (Magstripe_GetStatus() & MAG_CARDPRESENT) - ReadMagstripeData(); - - USB_HID_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(); - - /* Millisecond timer initialization, with output compare interrupt enabled for the idle timing */ - OCR0A = ((F_CPU / 64) / 1000); - TCCR0A = (1 << WGM01); - TCCR0B = ((1 << CS01) | (1 << CS00)); - TIMSK0 = (1 << OCIE0A); -} - -/** 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 < 3; 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); - - if (ClockPinLevel && ClockLevelChanged) - BitBuffer_StoreNextBit(&TrackDataBuffers[Track], DataPinLevel); - } - - Magstripe_Prev = Magstripe_LCL; - Magstripe_LCL = Magstripe_GetStatus(); - } -} - -/** Event handler for the library USB Configuration Changed event. */ -void EVENT_USB_ConfigurationChanged(void) -{ - USB_HID_ConfigureEndpoints(&Keyboard_HID_Interface); -} - -/** Event handler for the library USB Unhandled Control Packet event. */ -void EVENT_USB_UnhandledControlPacket(void) -{ - USB_HID_ProcessControlPacket(&Keyboard_HID_Interface); -} - -/** Timer 0 CTC ISR, firing once each millisecond to keep track of elapsed idle time in the HID interface. */ -ISR(TIMER0_COMPA_vect, ISR_BLOCK) -{ - if (Keyboard_HID_Interface.IdleMSRemaining) - Keyboard_HID_Interface.IdleMSRemaining--; -} - -/** HID Class driver callback function for the creation of a HID report for the host. - * - * \param HIDInterfaceInfo Pointer to the HID interface structure for the HID interface being referenced - * \param ReportID Report ID requested by the host if non-zero, otherwise callback should set to the generated report ID - * \param ReportData Pointer to the preallocated report buffer where the created report should be stored - * - * \return Number of bytes in the created report - */ -uint16_t CALLBACK_USB_HID_CreateNextHIDReport(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo, uint8_t* ReportID, void* ReportData) -{ - static bool IsKeyReleaseReport; - static bool IsNewlineReport; - - BitBuffer_t* Buffer = NULL; - USB_KeyboardReport_Data_t* KeyboardReport = (USB_KeyboardReport_Data_t*)ReportData; - - /* Key reports must be interleaved with 0 Key Code reports to release the keys, or repeated keys will be ignored */ - IsKeyReleaseReport = !IsKeyReleaseReport; - - if (IsKeyReleaseReport) - { - KeyboardReport->KeyCode = 0; - } - else if (IsNewlineReport) - { - IsNewlineReport = false; - KeyboardReport->KeyCode = KEY_ENTER; - } - else - { - if (TrackDataBuffers[0].Elements) - Buffer = &TrackDataBuffers[0]; - else if (TrackDataBuffers[1].Elements) - Buffer = &TrackDataBuffers[1]; - else if (TrackDataBuffers[2].Elements) - Buffer = &TrackDataBuffers[2]; - else - return 0; - - KeyboardReport->KeyCode = BitBuffer_GetNextBit(Buffer) ? KEY_1 : KEY_0; - - /* If buffer now empty, next report must be a newline to seperate track data */ - if (!(Buffer->Elements)) - IsNewlineReport = true; - } - - return sizeof(USB_KeyboardReport_Data_t); -} - -/** HID Class driver callback function for the processing of a received HID report from the host. - * - * \param HIDInterfaceInfo Pointer to the HID interface structure for the HID interface being referenced - * \param ReportID Report ID of the received report from the host - * \param ReportData Pointer to the report buffer where the received report is stored - * \param ReportSize Size in bytes of the report received from the host - */ -void CALLBACK_USB_HID_ProcessReceivedHIDReport(USB_ClassInfo_HID_Device_t* HIDInterfaceInfo, uint8_t ReportID, - void* ReportData, 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, 2013. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2010 Denver Gingerich (denver [at] ossguy [dot] com) + Copyright 2013 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 disclaims 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. + */ +static BitBuffer_t TrackDataBuffers[TOTAL_TRACKS]; + +/** Pointer to the current track buffer being sent to the host. */ +static BitBuffer_t* CurrentTrackBuffer = &TrackDataBuffers[TOTAL_TRACKS]; + +/** Buffer to hold the previously generated Keyboard HID report, for comparison purposes inside the HID class driver. */ +static 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, + .ReportINEndpoint = + { + .Address = KEYBOARD_EPADDR, + .Size = KEYBOARD_EPSIZE, + .Banks = 1, + }, + .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]); + + GlobalInterruptEnable(); + + 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 Control Request reception event. */ +void EVENT_USB_Device_ControlRequest(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 HID_REPORT_ITEM_In or HID_REPORT_ITEM_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 \c true to force the sending of the report, \c 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* const 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] ReportType The type of report that the host has sent, either HID_REPORT_ITEM_Out or HID_REPORT_ITEM_Feature + * \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 uint8_t ReportType, + const void* ReportData, + const uint16_t ReportSize) +{ + // Ignore keyboard LED reports from the host, but still need to declare the callback routine +} +