16550 uart problem
From: David (vonarburg.nospam_at_omnisec.ch)
Date: 12/31/04
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Date: Fri, 31 Dec 2004 12:52:55 +0100
Hi all,
I have a 16550 uart running at 115200 8N1.
The level at which the UART generates an Interrupt when receiving data is 8.
This means if it has 8 bytes of 16 of it's input fifo filled, it will make
the interrupt.
But I have still data loss if receiving large amounts of data from a PC to
my device.
It seems, that the PC has too long to stop it's transmission. The PC is
running Windows XP.
Is there a definied number of bytes the PC is allowed to send after the
handshake signal tells
it to stop sending?
Thanks in advance
David
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