Heiko Schocher schrieb:
Hello Stefan,
Stefan Roese wrote:
On Thursday 06 March 2008, Andre Schwarz wrote:
Stefan Roese schrieb:
On Wednesday 05 March 2008, Andre Schwarz wrote:
[...]
There's a include/ACEX1K.h that introduces two interfaces for obviously
the same funtionality.
The first one is specific to ACEX1K and the other one is a general
cyclone implementation as it should be.
Please clean it up too.
Maybe we should do a cyclon2.h ?
include/ACEX1K.h
Obviously there are some confusions about the various file formats and
sizes that can be output
from Altera's SoPC Builder. Compression is also possible with
de-compression on the fly during load ...
Of course the defined file sizes should match a raw bit file that
represents the true size of the device.
Why is ACEX1K and Cyclone not merged ?
No idea. If you have some fixes, please send patches.
Does _any_ real board use the Altera path ? scanning the config files
... no.
alpr seems to use the cyclone2.c code.
no - it uses common/ACEX1K.c .... and common/cyclon2.c is derived from it.
No, it doesn't use common/ACEX1K.c.
Yes, common/ACEX1K.c was the base for me to make the cyclon2.c.
CYC2_ps_load in common/cyclon2.c the nCONFIG pin is never de-asserted
during preparation. This code can't work.
No idea. I have to admit, that I didn't implement the FPGA booting on
this board. But it seems to work fine.
yes - because it's a board specific implementation with an "general"
interface.
???
What do you mean with "board specific implementation". Its for a cyclon2
FPGA. I am not a FPGA specialist, but I think there were some differences
between this FPGAs and so I made a new File ...
Is there any interest in getting this fixed ?
Sure.
But implementing the Altera path in a clean way means discarding the
ACEX1K and breaking the alpr borad.
I'm quite sure that Wolfgang will reject those changes.
Yes, I will reject this too. :)
Why you break the alpr board. It uses the common/cyclon2.c?
(OK, we should make a include/cyclon2.h and then we can drop the ACEX1K, right?)
I admit that I have not followed the ACEX1K down through the interface.
But since there is an ACEX1K "#define"
in common/altera.c and the serial download of the Cyclone is broken
(missing deassertion of nConfig) it looked like
alpr used the ACEX1K.
As I see now this is not true. We should fix the programming of nConfig
and verify on alpr.
Then we can remove ACEX1K and prepare for Cyclone-II and -III with a
unified loader, corrected chip
sizes and variable bitstream formats including endianess.
How can we solve this ?
By trying to solve it in a compatible way. I added Heiko Schocher to CC too,
since he was responsible for the FPGA booting implementation of the alpr
board.
I have to admit that this was my First and only FPGA Implementation.
Stefan, do you know, if we have somewhere an alpr board, so we can do
tests with it, if we change code?
bye
Heiko
If would be great if you could test the changes on alpr before applying
patches.
It looks like no other Altera boards are in the tree ... I have
different ones and can do excessive testing.
regards,
Andre
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