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Remove dff init altogether 

The hardware does not actually support it.
In reality it is always initialised to its reset value.
This commit is contained in:
Pepijn de Vos 2019-11-19 15:53:44 +01:00
parent dd8c7e1ddd
commit 8ab412eb16
2 changed files with 3 additions and 3 deletions
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5
techlibs/gowin/cells_map.v
View File

@ -1,9 +1,10 @@
//TODO all DFF* have INIT //All DFF* have INIT, but the hardware is always initialised to the reset
//value regardless. The parameter is ignored.
// DFFN D Flip-Flop with Negative-Edge Clock // DFFN D Flip-Flop with Negative-Edge Clock
module \$_DFF_N_ (input D, C, output Q); DFFN _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C)); endmodule module \$_DFF_N_ (input D, C, output Q); DFFN _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C)); endmodule
// DFF D Flip-Flop // DFF D Flip-Flop
module \$_DFF_P_ #(parameter INIT = 1'b0) (input D, C, output Q); DFF #(.INIT(INIT)) _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C)); endmodule module \$_DFF_P_ (input D, C, output Q); DFF _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C)); endmodule
// DFFE D Flip-Flop with Clock Enable // DFFE D Flip-Flop with Clock Enable
module \$_DFFE_PP_ (input D, C, E, output Q); DFFE _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C), .CE(E)); endmodule module \$_DFFE_PP_ (input D, C, E, output Q); DFFE _TECHMAP_REPLACE_ (.D(D), .Q(Q), .CLK(C), .CE(E)); endmodule

1
techlibs/gowin/synth_gowin.cc
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@ -238,7 +238,6 @@ struct SynthGowinPass : public ScriptPass
run("hilomap -singleton -hicell VCC V -locell GND G"); run("hilomap -singleton -hicell VCC V -locell GND G");
run("iopadmap -bits -inpad IBUF O:I -outpad OBUF I:O " run("iopadmap -bits -inpad IBUF O:I -outpad OBUF I:O "
"-toutpad TBUF OEN:I:O -tinoutpad IOBUF OEN:O:I:IO", "(unless -noiopads)"); "-toutpad TBUF OEN:I:O -tinoutpad IOBUF OEN:O:I:IO", "(unless -noiopads)");
run("dffinit -ff DFF Q INIT");
run("clean"); run("clean");
} }