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Fix demos based on the device mode HID class driver, as well as the driver itself. Changed HID device class driver to require the user to give a buffer and size to hold the previously generated report, for comparison purposes, and altered the prototype of the CALLBACK_HID_Device_CreateHIDReport() function so that reports can be sent to the host even if there are no apparent changes (useful for relative movements in mice, etc.).

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This commit is contained in:
Dean Camera 2009-07-31 03:22:08 +00:00
parent a789619fbe
commit eb41086947
14 changed files with 135 additions and 74 deletions
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23
Projects/Magstripe/Magstripe.c
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@ -45,6 +45,9 @@ 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.
@ -57,6 +60,9 @@ USB_ClassInfo_HID_Device_t Keyboard_HID_Interface =
.ReportINEndpointNumber = KEYBOARD_EPNUM,
.ReportINEndpointSize = KEYBOARD_EPSIZE,
.PrevReportINBuffer = PrevKeyboardHIDReportBuffer,
.PrevReportINBufferSize = sizeof(PrevKeyboardHIDReportBuffer),
},
};
@ -156,15 +162,17 @@ ISR(TIMER0_COMPA_vect, ISR_BLOCK)
HID_Device_MillisecondElapsed(&Keyboard_HID_Interface);
}
/** HID Class driver callback function for the creation of a HID report for the host.
/** HID class driver callback function for the creation of HID reports to the host.
*
* \param[in] HIDInterfaceInfo Pointer to the HID interface structure for the HID interface 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[out] ReportData Pointer to the preallocated report buffer where the created report should be stored
* \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[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 Number of bytes in the created report
* \return Boolean true to force the sending of the report, false to let the library determine if it needs to be sent
*/
uint16_t CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID, void* ReportData)
bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo, uint8_t* const ReportID,
void* ReportData, uint16_t* ReportSize)
{
USB_KeyboardReport_Data_t* KeyboardReport = (USB_KeyboardReport_Data_t*)ReportData;
@ -190,7 +198,8 @@ uint16_t CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const H
KeyboardReport->KeyCode = BitBuffer_GetNextBit(CurrentTrackBuffer) ? KEY_1 : KEY_0;
}
return sizeof(USB_KeyboardReport_Data_t);
*ReportSize = sizeof(USB_KeyboardReport_Data_t);
return false;
}
/** HID Class driver callback function for the processing of a received HID report from the host.