X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/d1e52660368d34d693131f6aff3c8fd8584162e5..f896c00c48f04fb9273555ab8d9b1af99f865d25:/Projects/Magstripe/Magstripe.c

diff --git a/Projects/Magstripe/Magstripe.c b/Projects/Magstripe/Magstripe.c
index 5cd107e9a..4e26d9b22 100644
--- a/Projects/Magstripe/Magstripe.c
+++ b/Projects/Magstripe/Magstripe.c
@@ -29,18 +29,36 @@
   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];
 
-USB_ClassInfo_HID_t Keyboard_HID_Interface =
+/** 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();
@@ -58,6 +76,7 @@ int main(void)
 	}
 }
 
+/** Configures the board hardware and chip peripherals for the demo's functionality. */
 void SetupHardware(void)
 {
 	/* Disable watchdog if enabled by bootloader/fuses */
@@ -70,8 +89,17 @@ void SetupHardware(void)
 	/* 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 */
@@ -103,22 +131,34 @@ void ReadMagstripeData(void)
 	}
 }
 
+/** 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);
 }
 
-void EVENT_USB_StartOfFrame(void)
+/** 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)
 {
-	USB_HID_RegisterStartOfFrame(&Keyboard_HID_Interface);
+	if (Keyboard_HID_Interface.IdleMSRemaining)
+	  Keyboard_HID_Interface.IdleMSRemaining--;
 }
 
-uint16_t CALLBACK_USB_HID_CreateNextHIDReport(USB_ClassInfo_HID_t* HIDInterfaceInfo, void* ReportData)
+/** 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;
@@ -159,7 +199,15 @@ uint16_t CALLBACK_USB_HID_CreateNextHIDReport(USB_ClassInfo_HID_t* HIDInterfaceI
 	return sizeof(USB_KeyboardReport_Data_t);
 }
 
-void CALLBACK_USB_HID_ProcessReceivedHIDReport(USB_ClassInfo_HID_t* HIDInterfaceInfo, void* ReportData, uint16_t ReportSize)
+/** 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
 }