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XC7 Startupe2 primitive #2210

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onestacked opened this issue Jul 19, 2021 · 6 comments
Open

XC7 Startupe2 primitive #2210

onestacked opened this issue Jul 19, 2021 · 6 comments

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@onestacked
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onestacked commented Jul 19, 2021 •
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I wanted to write a controller for the qspi flash on the Nexys 4 DDR / Nexys A7.
To do that i need to instantiate a STARTUPE2 primitive to control the serial clock port that is also used for initial configuration.

I noticed that (at least parts of it) were already fuzzed by project xray (038-cfg) but it wasn't in this repo and tried adding it myself but failed.

I'd like to get some pointer to what is needed for me to be able to add it myself (or that someone else just adds it themselves)
@mithro
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mithro commented Jul 19, 2021

FYI - @acomodi @kgugala

@tmichalak
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@chriss0612 we are working on the documentation on how to add a primitive to arch-defs in this PR. I guess you can use it as a starting point for adding the STARTUPE2 primitive.

@onestacked
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Thank you, I will take a look at it!

@onestacked
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I've noticed that STARTUPUE2 already is in xc/common/libraries/cells_xtra.xml:

<module name="STARTUPE2">
    <port name="CFGCLK" type="output" width="1"/>
    <port name="CFGMCLK" type="output" width="1"/>
    <port name="CLK" type="input" width="1"/>
    <port name="EOS" type="output" width="1"/>
    <port name="GSR" type="input" width="1"/>
    <port name="GTS" type="input" width="1"/>
    <port name="KEYCLEARB" type="input" width="1"/>
    <port name="PACK" type="input" width="1"/>
    <port name="PREQ" type="output" width="1"/>
    <port name="USRCCLKO" type="input" width="1"/>
    <port name="USRCCLKTS" type="input" width="1"/>
    <port name="USRDONEO" type="input" width="1"/>
    <port name="USRDONETS" type="input" width="1"/>
    <attribute default="FALSE" name="PROG_USR" type="STRING" values="FALSE, TRUE"/>
    <attribute default="0.0" name="SIM_CCLK_FREQ" type="FLOAT (nS)" values="0.0 to 10.0"/>
  </module>

Does that save me any work?

@lgl1227
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lgl1227 commented Apr 7, 2024

@onestacked do you add STARTUPUE2 primitive sucessful?

@onestacked
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onestacked commented Apr 7, 2024 •
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I've tried a bit but haven't really gotten far and then stopped working on it.

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@mithro @onestacked @tmichalak @lgl1227