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Ensure that the CDC class drivers return 0 if the number of unread bytes is queried and the bank has become empty.

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This commit is contained in:
Dean Camera 2010-05-06 11:13:24 +00:00
parent c3db72afdc
commit cde2afc50e
3 changed files with 19 additions and 10 deletions
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2
Bootloaders/TeensyHID/makefile
View File

@ -68,7 +68,7 @@ BOARD =
# does not *change* the processor frequency - it should merely be updated to # does not *change* the processor frequency - it should merely be updated to
# reflect the processor speed set externally so that the code can use accurate # reflect the processor speed set externally so that the code can use accurate
# software delays. # software delays.
F_CPU = 8000000 F_CPU = 16000000
# Input clock frequency. # Input clock frequency.

7
LUFA/Drivers/USB/Class/Device/CDC.c
View File

@ -195,10 +195,15 @@ uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterface
if (Endpoint_IsOUTReceived()) if (Endpoint_IsOUTReceived())
{ {
if (!(Endpoint_BytesInEndpoint())) if (!(Endpoint_BytesInEndpoint()))
{
Endpoint_ClearOUT(); Endpoint_ClearOUT();
return 0;
}
else
{
return Endpoint_BytesInEndpoint(); return Endpoint_BytesInEndpoint();
} }
}
else else
{ {
return 0; return 0;

12
LUFA/Drivers/USB/Class/Host/CDC.c
View File

@ -315,12 +315,16 @@ uint16_t CDC_Host_BytesReceived(USB_ClassInfo_CDC_Host_t* const CDCInterfaceInfo
if (Pipe_IsINReceived()) if (Pipe_IsINReceived())
{ {
if (!(Pipe_BytesInPipe())) if (!(Pipe_BytesInPipe()))
{
Pipe_ClearIN(); Pipe_ClearIN();
BytesInPipe = Pipe_BytesInPipe();
Pipe_Freeze(); Pipe_Freeze();
return 0;
return BytesInPipe; }
else
{
Pipe_Freeze();
return Pipe_BytesInPipe();
}
} }
else else
{ {