[Milkymist-devel] Lastest sbapshot. Timing constraint not met

[Uwe Bonnes]

>>>>> "Sébastien" == Sébastien Bourdeauducq <sebastien.bourdeauducq at lekernel.net> writes:

    Sébastien> Hi, I did not try to synthesize it with ISE 10.1; only 11.1
    Sébastien> and 11.2 - and timing is met with both.
I see.
    Sébastien> The 10.1 version could well be the source of the problem, as
    Sébastien> Xilinx regularly improves the performance of the synthesizer
    Sébastien> with each major release. You can get the 11.2 Webpack edition
    Sébastien> for free at the Xilinx website, and it's sufficient for
    Sébastien> building Milkymist.

It's already installed, but I didn't switch yet.

    Sébastien> For your information, 79% of the slices are occupied; and
    Sébastien> this snapshot is very close to the current SVN regarding the
    Sébastien> hardware design (only minor changes in the texture mapping
    Sébastien> unit and the AC'97 controller have been made).

Here the report from 10.1.03
Device Utilization Summary:

   Number of BUFGs                           5 out of 32     15%
      Number of LOCed BUFGs                  1 out of 5      20%

   Number of DCM_ADVs                        2 out of 8      25%
      Number of LOCed DCM_ADVs               2 out of 2     100%

   Number of DSP48s                         12 out of 48     25%
   Number of IDELAYCTRLs                    16 out of 16    100%
   Number of ILOGICs                        95 out of 448    21%
   Number of External IOBs                 226 out of 448    50%
      Number of LOCed IOBs                 226 out of 226   100%

   Number of OLOGICs                       153 out of 448    34%
   Number of RAMB16s                        45 out of 72     62%
   Number of Slices                       8655 out of 10752  80%
      Number of SLICEMs                    509 out of 5376    9%

Slice utilization seems also lower with 11.2.

Bye
-- 
Uwe Bonnes                bon at elektron.ikp.physik.tu-darmstadt.de

Institut fuer Kernphysik  Schlossgartenstrasse 9  64289 Darmstadt
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