gatemate: invert output enable for io buffer

mmicko · mmicko · commit 23a99989d18d · 2025-05-19T09:47:17.000+02:00
diff --git a/himbaechel/uarch/gatemate/pack_io.cc b/himbaechel/uarch/gatemate/pack_io.cc
@@ -503,7 +503,9 @@ void GateMatePacker::pack_io_sel()
 
         Loc root_loc = ctx->getBelLocation(ci.bel);
         for (int i = 0; i < 4; i++) {
-            move_ram_o_fixed(&ci, ctx->idf("OUT%d", i + 1), root_loc);
+            CellInfo *cpe = move_ram_o_fixed(&ci, ctx->idf("OUT%d", i + 1), root_loc);
+            if (cpe && i == 2)
+                cpe->params[id_INIT_L10] = Property(0b0101, 4); // Invert CPE out for output enable (OUT3)
         }
     }
     flush_cells();

Original file line number	Diff line number	Diff line change
`@@ -503,7 +503,9 @@ void GateMatePacker::pack_io_sel()`
`503`	`503`
`504`	`504`	`Loc root_loc = ctx->getBelLocation(ci.bel);`
`505`	`505`	`for (int i = 0; i < 4; i++) {`
`506`		`- move_ram_o_fixed(&ci, ctx->idf("OUT%d", i + 1), root_loc);`
	`506`	`+ CellInfo *cpe = move_ram_o_fixed(&ci, ctx->idf("OUT%d", i + 1), root_loc);`
	`507`	`+ if (cpe && i == 2)`
	`508`	`+ cpe->params[id_INIT_L10] = Property(0b0101, 4); // Invert CPE out for output enable (OUT3)`
`507`	`509`	`}`
`508`	`510`	`}`
`509`	`511`	`flush_cells();`