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Make HID device class driver ignore the previous HID report comparison buffer when the user sets it to NULL, disabling automatic report comparisons. Update HID device class driver documentation giving previous report buffer limitations.

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This commit is contained in:
Dean Camera 2009-10-26 11:44:36 +00:00
parent 9ea891ea20
commit de8c9445d4
3 changed files with 33 additions and 23 deletions
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11
LUFA/Drivers/USB/Class/Device/HID.c
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@ -157,12 +157,15 @@ void HID_Device_USBTask(USB_ClassInfo_HID_Device_t* const HIDInterfaceInfo)
memset(ReportINData, 0, sizeof(ReportINData));
bool ForceSend = CALLBACK_HID_Device_CreateHIDReport(HIDInterfaceInfo, &ReportID, ReportINData, &ReportINSize);
bool StatesChanged = (memcmp(ReportINData, HIDInterfaceInfo->Config.PrevReportINBuffer, ReportINSize) != 0);
bool ForceSend = CALLBACK_HID_Device_CreateHIDReport(HIDInterfaceInfo, &ReportID, ReportINData, &ReportINSize);
bool StatesChanged = false;
bool IdlePeriodElapsed = (HIDInterfaceInfo->State.IdleCount && !(HIDInterfaceInfo->State.IdleMSRemaining));
memcpy(HIDInterfaceInfo->Config.PrevReportINBuffer, ReportINData, ReportINSize);
if (HIDInterfaceInfo->Config.PrevReportINBuffer != NULL)
{
StatesChanged = (memcmp(ReportINData, HIDInterfaceInfo->Config.PrevReportINBuffer, ReportINSize) != 0);
memcpy(HIDInterfaceInfo->Config.PrevReportINBuffer, ReportINData, ReportINSize);
}
if (ReportINSize && (ForceSend || StatesChanged || IdlePeriodElapsed))
{