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Initial support for extraction of counters with clock enable

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This commit is contained in:
Andrew Zonenberg 2017-09-13 10:58:41 -07:00
parent c4a70a8cc3
commit a84172b23b
2 changed files with 131 additions and 30 deletions
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86
techlibs/greenpak4/cells_map.v
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@ -161,8 +161,8 @@ module \$__COUNT_ (CE, CLK, OUT, POUT, RST, UP);
parameter WIDTH = 8;
parameter DIRECTION = "DOWN";
//If we have a CE, or DIRECTION other than DOWN fail... GP_COUNTx_ADV is not supported yet
if(HAS_CE || (DIRECTION != "DOWN") ) begin
//If we have a DIRECTION other than DOWN fail... GP_COUNTx_ADV is not supported yet
if(DIRECTION != "DOWN") begin
initial begin
$display("ERROR: \$__COUNT_ support for GP_COUNTx_ADV is not yet implemented. This counter should never have been extracted (bug in extract_counter pass?).");
$finish;
@ -187,28 +187,72 @@ module \$__COUNT_ (CE, CLK, OUT, POUT, RST, UP);
//Looks like a legal counter! Do something with it
else if(WIDTH <= 8) begin
GP_COUNT8 #(
.COUNT_TO(COUNT_TO),
.RESET_MODE(RESET_MODE),
.CLKIN_DIVIDE(1)
) _TECHMAP_REPLACE_ (
.CLK(CLK),
.RST(RST),
.OUT(OUT),
.POUT(POUT)
);
if(HAS_CE) begin
wire ce_not;
GP_INV ceinv(
.IN(CE),
.OUT(ce_not)
);
GP_COUNT8_ADV #(
.COUNT_TO(COUNT_TO),
.RESET_MODE(RESET_MODE),
.RESET_VALUE("COUNT_TO"),
.CLKIN_DIVIDE(1)
) _TECHMAP_REPLACE_ (
.CLK(CLK),
.RST(RST),
.OUT(OUT),
.UP(1'b0), //always count down for now
.KEEP(ce_not),
.POUT(POUT)
);
end
else begin
GP_COUNT8 #(
.COUNT_TO(COUNT_TO),
.RESET_MODE(RESET_MODE),
.CLKIN_DIVIDE(1)
) _TECHMAP_REPLACE_ (
.CLK(CLK),
.RST(RST),
.OUT(OUT),
.POUT(POUT)
);
end
end
else begin
GP_COUNT14 #(
.COUNT_TO(COUNT_TO),
.RESET_MODE(RESET_MODE),
.CLKIN_DIVIDE(1)
) _TECHMAP_REPLACE_ (
.CLK(CLK),
.RST(RST),
.OUT(OUT)
);
if(HAS_CE) begin
wire ce_not;
GP_INV ceinv(
.IN(CE),
.OUT(ce_not)
);
GP_COUNT14_ADV #(
.COUNT_TO(COUNT_TO),
.RESET_MODE(RESET_MODE),
.RESET_VALUE("COUNT_TO"),
.CLKIN_DIVIDE(1)
) _TECHMAP_REPLACE_ (
.CLK(CLK),
.RST(RST),
.OUT(OUT),
.UP(1'b0), //always count down for now
.KEEP(ce_not),
.POUT(POUT)
);
end
else begin
GP_COUNT14 #(
.COUNT_TO(COUNT_TO),
.RESET_MODE(RESET_MODE),
.CLKIN_DIVIDE(1)
) _TECHMAP_REPLACE_ (
.CLK(CLK),
.RST(RST),
.OUT(OUT)
);
end
end
endmodule