[U-Boot-Users] SPI + SCC problem

Yigit Can yigit.can at karel.com.tr
Mon Jun 30 11:08:11 CEST 2003

I use 3 different drivers,

I'm using standard TQ850L_config in kernel (eldk 2.0.2)

first one comes with eldk I only made a small modification to compile with

second is an interrupt driven driver working with TQM862L (I have verified

and I wrote the last one using 850 user-manual to be sure.

All has the same problem when I choose SCC1 they work perfectly ,but when I
choose the other SCCs or disable the SCC ethernet,
they send data but they stall while receiving becouse the buffer descriptor
cbd_sc register does not change (rx_bdf->cbd_sc).

Best regards,

Yigit Can

----- Original Message -----
From: "Wolfgang Denk" <wd at denx.de>
To: "Yigit Can" <yigit.can at karel.com.tr>
Cc: <u-boot-users at lists.sourceforge.net>
Sent: Monday, June 30, 2003 11:53 AM
Subject: Re: [U-Boot-Users] SPI + SCC problem

> In message <007c01c33ee0$3f4c3060$3002a8c0 at yigitcan> you wrote:
> > Yes, I attach an oscilloscope and I can see it sends the data properly
> >
> > in addition to this problem,
> > the drivers ONLY work with SCC1, choosing the other SCCs or disabling
> > SCC ethernet makes no difference.
> I lost you here. Which driver work only with SCC1?
> We have been using the SPI driver in several  projects  on  different
> hardware, and did not notice any problems.
> Did you check for possible conflicts in the usage of port pins?
> Best regards,
> Wolfgang Denk
> --
> Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
> Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
> Philosophy is a game with objectives and no rules.
> Mathematics is a game with rules and no objectives.

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