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Gowin: deal with active-low tristate (#2971)

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* deal with active-low tristate

* remove empty port

* update sim models

* add expected lut1 to tests
This commit is contained in:
Pepijn de Vos 2021-08-20 21:21:06 +02:00 • committed by GitHub
parent c2866780d2
commit c2d358484f
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GPG key ID: 4AEE18F83AFDEB23
5 changed files with 15 additions and 7 deletions
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6
techlibs/gowin/synth_gowin.cc
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@ -241,6 +241,9 @@ struct SynthGowinPass : public ScriptPass
if (retime || help_mode)
run("abc -dff -D 1", "(only if -retime)");
run("splitnets");
if (!noiopads || help_mode)
run("iopadmap -bits -inpad IBUF O:I -outpad OBUF I:O "
"-toutpad $__GW_TBUF OE:I:O -tinoutpad $__GW_IOBUF OE:O:I:IO", "(unless -noiopads)");
}
if (check_label("map_ffs"))
@ -277,9 +280,6 @@ struct SynthGowinPass : public ScriptPass
run("opt_lut_ins -tech gowin");
run("setundef -undriven -params -zero");
run("hilomap -singleton -hicell VCC V -locell GND G");
if (!noiopads || help_mode)
run("iopadmap -bits -inpad IBUF O:I -outpad OBUF I:O "
"-toutpad TBUF OEN:I:O -tinoutpad IOBUF OEN:O:I:IO", "(unless -noiopads)");
run("clean");
run("autoname");
}