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Altered the CDC Deivice and Host Class drivers' receive byte routines, so that no data is indicated by a negative return value.

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Added auto flushing of OUT data to the CDC Host Class driver's USBTask function to automatically flush the send pipe buffer.
This commit is contained in:
Dean Camera 2010-07-30 03:52:11 +00:00
parent 7c8d16fd7a
commit 24e621a8d8
13 changed files with 89 additions and 59 deletions
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32
LUFA/Drivers/USB/Class/Device/CDC.c
View file

@ -128,11 +128,6 @@ void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
{
if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
return;
Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
if (Endpoint_IsOUTReceived() && !(Endpoint_BytesInEndpoint()))
Endpoint_ClearOUT();
CDC_Device_Flush(CDCInterfaceInfo);
}
@ -222,19 +217,24 @@ uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterface
}
}
uint8_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
int16_t CDC_Device_ReceiveByte(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
{
uint8_t ReceivedByte = -1;
if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
return 0;
Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
uint8_t DataByte = Endpoint_Read_Byte();
if (!(Endpoint_IsOUTReceived()))
return -1;
else if (Endpoint_BytesInEndpoint())
ReceivedByte = Endpoint_Read_Byte();
if (!(Endpoint_BytesInEndpoint()))
Endpoint_ClearOUT();
return DataByte;
return ReceivedByte;
}
void CDC_Device_SendControlLineStateChange(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
@ -282,24 +282,28 @@ static int CDC_Device_putchar(char c,
static int CDC_Device_getchar(FILE* Stream)
{
if (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))))
int16_t ReceivedByte = CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
if (ReceivedByte < 0)
return _FDEV_EOF;
return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
return ReceivedByte;
}
static int CDC_Device_getchar_Blocking(FILE* Stream)
{
while (!(CDC_Device_BytesReceived((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))))
int16_t ReceivedByte;
while ((ReceivedByte = CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream))) < 0)
{
if (USB_DeviceState == DEVICE_STATE_Unattached)
return _FDEV_EOF;
CDC_Device_USBTask((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
USB_USBTask();
USB_USBTask();
}
return CDC_Device_ReceiveByte((USB_ClassInfo_CDC_Device_t*)fdev_get_udata(Stream));
return ReceivedByte;
}
#endif