serial rxerr

Andy Green andy at
Tue Feb 3 19:59:31 CET 2009

Hash: SHA1

Somebody in the thread at some point said:
| Hi,
| Andy Green wrote:
| Somebody in the thread at some point said:
| | Hi,
| |
| | I will carry on of the serial rxerr. I have some experience with the
| | serial device, it is possible to
| | have a simple test case?
| Ah I came to think that this is a very different issue than it seems.
| The error code reported on the trac bug for it means FIFO overrun.
| So I think the issue is one or both of
| ~ - RTS / CTS auto handshake broken
| ~ - long interrupt lockout or another in the priority set is taking
| too long
|> The fifo of gta02 is 16 char? The speed of the open serial device?

They're 64 bytes at 115.2kbps.

But, we should have "Auto flow control" on GSM modem port (RTS / CTS
operation in hardware according to FIFO level).

It means we should be immune from overrun totally.

The status register on failure reports RX overrun though... that seems
to be the big clue.

- -Andy
Version: GnuPG v1.4.9 (GNU/Linux)
Comment: Using GnuPG with Fedora -


More information about the openmoko-kernel mailing list