[uClinux-dev]problem of communicating between uClinux & uC/OS-II

[Robin Getz]

On Thu 11 Oct 2007 06:35, Stanislav Meduna pondered:
> SIE wrote:
> 
> > S3C4510B,a little different from the page you mentioned,does not have a
> > fifo for uart.
> 
> Ahh.. ok. Right, it is there only for HDLC...
> 
> Anyway, the datasheet
> http://www.datasheetcatalog.com/datasheets_pdf/S/3/C/4/S3C4510B.shtml
> mentions that the serial port is able to do DMA, effectively
> using the system memory as the FIFO. You'd need to write
> a driver for this, but maybe this is the cleanest option.
> 

The Blackfin serial driver (in kernel mainline) does this - you might want to peek there.

We have tested it with baud rates up to 4Mbits/s (for Bluetooth devices), and we don't drop packets.

-Robin