Re: Linux serial port dropping bytes

Derek Young wrote:

I'm using an Arcom Viper PXA255 single board computer running Linux,
and I'm trying to receive bytes over the built-in RS-422 serial port
at 921.6 kbps. The received packets are 1500 bytes long. The UART
is a 16C2850 (dual port version of the 16C850 with 128 byte FIFO).

Everything works fine at low speeds, but if the packet rate
increases, I start to lose bytes.

Your numbers indicate that you would need an interrupt roughly
every 1 microsec. Not a chance.

[mail]: Chuck F (cbfalconer at maineline dot net)
[page]: <>
Try the download section.

Posted via a free Usenet account from