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Fixed CDC and USBtoSerial demos freezing where buffers were full while still transmitting or receiving (thanks to Peter Hand).

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This commit is contained in:
Dean Camera 2009-04-17 04:10:30 +00:00
parent 11bb2f2172
commit 6380d057f8
3 changed files with 39 additions and 18 deletions
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18
Demos/Device/CDC/CDC.c
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@ -300,14 +300,22 @@ TASK(CDC_Task)
/* Write the String to the Endpoint */
Endpoint_Write_Stream_LE(ReportString, strlen(ReportString));
/* Remember if the packet to send completely fills the endpoint */
bool IsFull = (Endpoint_BytesInEndpoint() == CDC_TXRX_EPSIZE);
/* Finalize the stream transfer to send the last packet */
Endpoint_ClearIN();
/* Wait until the endpoint is ready for another packet */
while (!(Endpoint_IsINReady()));
/* Send an empty packet to ensure that the host does not buffer data sent to it */
Endpoint_ClearIN();
/* If the last packet filled the endpoint, send an empty packet to release the buffer on
* the receiver (otherwise all data will be cached until a non-full packet is received) */
if (IsFull)
{
/* Wait until the endpoint is ready for another packet */
while (!(Endpoint_IsINReady()));
/* Send an empty packet to ensure that the host does not buffer data sent to it */
Endpoint_ClearIN();
}
}
/* Select the Serial Rx Endpoint */