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Added CDC_Host_Flush() function to the CDC Host Class driver to flush sent data to the attached device.

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This commit is contained in:
Dean Camera 2009-11-30 02:20:26 +00:00
parent b7f6a65c25
commit 1b2cd16976
6 changed files with 57 additions and 2 deletions
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42
LUFA/Drivers/USB/Class/Host/CDC.c
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@ -374,6 +374,48 @@ uint8_t CDC_Host_ReceiveByte(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
return ReceivedByte;
}
uint8_t CDC_Host_Flush(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo)
{
if ((USB_HostState != HOST_STATE_Configured) || !(CDCInterfaceInfo->State.IsActive))
return PIPE_READYWAIT_DeviceDisconnected;
uint8_t ErrorCode;
if (CDCInterfaceInfo->State.BidirectionalDataEndpoints)
{
Pipe_SelectPipe(CDCInterfaceInfo->Config.DataINPipeNumber);
Pipe_SetPipeToken(PIPE_TOKEN_OUT);
}
else
{
Pipe_SelectPipe(CDCInterfaceInfo->Config.DataOUTPipeNumber);
}
Pipe_Unfreeze();
if (!(Pipe_BytesInPipe()))
return PIPE_READYWAIT_NoError;
bool BankFull = !(Pipe_IsReadWriteAllowed());
Pipe_ClearOUT();
if (BankFull)
{
if ((ErrorCode = Pipe_WaitUntilReady()) != PIPE_READYWAIT_NoError)
return ErrorCode;
Pipe_ClearOUT();
}
Pipe_Freeze();
if (CDCInterfaceInfo->State.BidirectionalDataEndpoints)
Pipe_SetPipeToken(PIPE_TOKEN_IN);
return PIPE_READYWAIT_NoError;
}
void CDC_Host_CreateStream(USB_ClassInfo_CDC_Host_t* CDCInterfaceInfo, FILE* Stream)
{
*Stream = (FILE)FDEV_SETUP_STREAM(CDC_Host_putchar, CDC_Host_getchar, _FDEV_SETUP_RW);