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Added new EVENT_USB_Device_StartOfFrame() event, controlled by the new USB_Device_EnableSOFEvents() and USB_Device_DisableSOFEvents() macros to give bus-synchronised millisecond interrupts when in USB device mode.

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This commit is contained in:
Dean Camera
2009-08-16 08:51:54 +00:00
parent 25ddbb9e3b
commit b71ff7c8cd
23 changed files with 83 additions and 75 deletions
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12
Projects/Magstripe/Magstripe.c
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@@ -99,12 +99,6 @@ 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
@@ -148,6 +142,8 @@ void ReadMagstripeData(void)
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. */
@@ -156,8 +152,8 @@ void EVENT_USB_Device_UnhandledControlRequest(void)
HID_Device_ProcessControlRequest(&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)
/** Event handler for the USB device Start Of Frame event. */
void EVENT_USB_Device_StartOfFrame(void)
{
HID_Device_MillisecondElapsed(&Keyboard_HID_Interface);
}

1
Projects/Magstripe/Magstripe.h
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@@ -84,6 +84,7 @@
void EVENT_USB_Device_ConfigurationChanged(void);
void EVENT_USB_Device_UnhandledControlRequest(void);
void EVENT_USB_Device_StartOfFrame(void);
bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID,
void* ReportData, uint16_t* ReportSize);