RE: using PCE's ?

Oh, whoops, I didn't notice you were actually modifying the control
registers to move the PCE's.
I think you actually have to use a different kind of move instruction to use
the PCE's if you put the processor in another mode, but I've never tried
this.

NZG.

-----Original Message-----
From: NZG [mailto:[email protected]]
Sent: Thursday, March 25, 2004 2:07 PM
To: 'Hans Brinkman'; 'tini-6tN4nzCoH/[email protected]'
Subject: RE: [TINI]using PCE's ?


The OS doesn't use the PCE's, it configures the processor to use CE's for
the entire memory region.
The PCE lines can be used as GPIO's and are in fact by the Dallas SPI native
library.
They can also be moved(at a much slower rate) by the BitPort object.

NZG.

-----Original Message-----
From: tini-admin-6tN4nzCoH/[email protected] [mailto:[email protected]]On Behalf Of
Hans Brinkman
Sent: Thursday, March 25, 2004 7:03 AM
To: 'tini-6tN4nzCoH/[email protected]'
Subject: [TINI]using PCE's ?


Hi all

I'm using the Dallas 400 with SRAM at 0x0 - 0x100000 (1MB) and Flash at
0x400000-0x600000 (2MB). I am trying to get the PCE's working.
I have tried all sorts of SFR-settings, but so far, none of the PCE lines do
anything, apart from staying at high level.
The SFR's:
MCON = B3	- CE0, CE1 as Prog/Data memory and CE2, CE3 as Prog memory
P4CNT = EF	- CE0, CE1, CE2 enabled, 2MB per CEx
P5CNT = 87	- PCE0, PCE1, PCE2, PCE3 enabled
P6CNT = E0	- 1MB/PCEx

As far as I can tell, when stepping through the entire 16MB, reading each
byte, at some point the PCE's should be activated.
So far, however, this has not happened and at least PCE2 and PCE3 stay rock
solid at high level.

Can anybody shine some light on this?
(also, P4CNT says that eg. PCE3 controls 768K - 1 MB, while according to the
PC6CNT this should be 3-4MB ??)

Thanks in advance.

Regards,
	Hans


Hans Brinkman
LogicaCMG bv.
Division IDT-RTAT2, Advanced Technology
Kralingseweg 241-249, 3062 CE Rotterdam
Tel: 010-2537000
Fax: 010-2537032
Email: hans.brinkman-/[email protected]
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