11 Jan
2013
11 Jan
'13
10:31 a.m.
On Thu, Jan 10, 2013 at 11:33 PM, Heiko Besemann <heiko(a)noordsee.de> wrote:
Hello Alex,
You should send mail to the mailing list, instead of specific
individuals. This way, i) you may get a responder quicker, and ii)
information can reach other interested people.
I read on Osmocom-BB mailing-list that you are using a GTA02 with
cross-compiled tools. Well, I did cross-compiling of the sylvain/burst_ind
branch for the OpenMoko, but starting osmocon I get an error that the
higher non-standard baudrate can not be set to /dev/ttySAC0.
On the GTA02 the calypso is wired to one internal UART of the
application processor SoC. AFAIR the SoC only supports up to 115200
bps so it won't be usable with burst_ind.
Cheers,
Alex
11 Jan
11 Jan
1:01 p.m.
New subject: GTA02 Burst_ind baudrate
Hi all,
On Fri, Jan 11, 2013 at 11:31:28AM +0200, Alex Badea wrote:
On the GTA02 the calypso is wired to one internal UART
of the
application processor SoC. AFAIR the SoC only supports up to 115200
bps so it won't be usable with burst_ind.
1) the IRDA UART is wired to the 2.5mm headset plug, so _if_ the IRDA
UART supports higher baudrates, you can simply output the samples
there.
2) The s3c2440 user manual provides at full reference on the UART of the
application processor. If you're willing to re-configure some of the
internal PLLs, then you can achieve baud rates up to 921.6kbps. So
I'm quite sure using the s3c2440 manual you can compute a PCLK
suitable for the non-standard high baudrate of burst_ind, and then
compute PLL parameters for ensuring the s3c2440 PLL generates that
PCLK.
Regards,
Harald
--
- Harald Welte <laforge(a)gnumonks.org> http://laforge.gnumonks.org/
============================================================================
"Privacy in residential applications is a desirable marketing option."
(ETSI EN 300 175-7 Ch. A6)
2:36 p.m.
New subject: GTA02 Burst_ind baudrate
Hi,
On Fri, 11 Jan 2013 13:01:08 +0100
Harald Welte <laforge(a)gnumonks.org> wrote:
2) The s3c2440 user manual provides at full reference
on the UART of
the application processor. If you're willing to re-configure some of
the internal PLLs, then you can achieve baud rates up to 921.6kbps.
So I'm quite sure using the s3c2440 manual you can compute a PCLK
suitable for the non-standard high baudrate of burst_ind, and then
compute PLL parameters for ensuring the s3c2440 PLL generates that
PCLK.
http://lists.infradead.org/pipermail/linux-arm-kernel/2012-February/083151.…
Note that it probably didn't go into mainline according to the comments
of this patch.
Also do higer baudrates require an external clock(I didn't check in
the SC32442B datasheet)? (and I guess the GTA02 has an internal
clock,but I didn't check myself on the schematics).
Denis.
4129
days inactive
4129
days old
baseband-devel@lists.osmocom.org
2 comments
3 participants
participants (3)
-
Alex Badea -
Denis 'GNUtoo' Carikli -
Harald Welte