use dedicated cell output for muxwidth = 1

[pinmux.git] / src / bsv / actual_pinmux.py

diff --git a/src/bsv/actual_pinmux.py b/src/bsv/actual_pinmux.py
index d2ce8160341df4890df5f777ea0b1202906542a7..d39600b478af9925dbfe95e22f590dcc6e38a4f3 100644 (file)
--- a/src/bsv/actual_pinmux.py
+++ b/src/bsv/actual_pinmux.py
@@ -24,13 +24,6 @@ dedicated_wire = '''
 digits = maketrans('0123456789', ' ' * 10)  # delete space later
 
 
-def get_cell_bit_width(p):
-    max_num_cells = 0
-    for cell in p.muxed_cells:
-        max_num_cells = max(len(cell) - 1, max_num_cells)
-    return int(math.log(max_num_cells + 1, 2))
-
-
 def cn(idx):  # idx is an integer
     return "cell%s_mux" % str(idx)
 
@@ -110,13 +103,15 @@ def mkmux(p, ifaces, cell, suffix, outenmode):
         multiple inputs and, based on an "address" routes
         a given indexed input through to the (one) output
     """
+    cellnum = cell[0]
     comment = 'outen' if outenmode else 'output'
     fmtstr = "\t\t\twr%s==%d?%s:%s\n"  # mux-selector format
     ret = ''
-    ret += "      // %s muxer for cell idx %s\n" % (comment, cell[0])
-    ret += "      %s%s=\n" % (cn(cell[0]), suffix)
+    ret += "      // %s muxer for cell idx %s\n" % (comment, cellnum)
+    ret += "      %s%s=\n" % (cn(cellnum), suffix)
+    i = 0
     for i in range(
-            0, (1 << p.cell_bitwidth) - 1):  # full mux range (minus 1)
+            0, p.get_muxwidth(cellnum) - 1):  # full mux range (minus 1)
         comment = mkcomment(ifaces, cell, i, outenmode)
         cf = fmt(ifaces, cell, i, suffix)
         ret += fmtstr % (cn(cell[0]), i, cf, comment)
@@ -147,11 +142,15 @@ def init(p, ifaces):
         the last one, and we do not want the "default" (last line)
         to be the output.
     """
-    p.cell_bitwidth = get_cell_bit_width(p)
     p.pinmux = ' '
     global dedicated_wire
     for cell in p.muxed_cells:
 
+        cellidx = cell[0]
+
+        p.pinmux += "      // --------------------\n"
+        p.pinmux += "      // ----- cell %s -----\n\n" % (cellidx)
+
         # first do the outputs
         p.pinmux += mkmux(p, ifaces, cell, '_out', False)
         p.pinmux += "\n"
@@ -167,7 +166,7 @@ def init(p, ifaces):
         # since the interfaces are always standard and cannot change from
         # user-to-user. Plus this also reduces human-error as well :)
         p.pinmux += "\n"
-        p.pinmux += "      // priority-in-muxer for cell idx %s\n" % (cell[0])
+        p.pinmux += "      // priority-in-muxer for cell idx %s\n" % (cellidx)
         for i in range(0, len(cell) - 1):
             cname = cell[i + 1]
             if not cname:  # skip blank entries, no need to test
@@ -179,14 +178,11 @@ def init(p, ifaces):
                 str(cname) + \
                 " of pinmap.txt isn't present \nin the current" + \
                 " dictionary. Update dictionary or fix-typo."
-            if x == "input":
-                p.pinmux += \
-                    mux_wire.format(cell[0], i, "wr" + cname) + "\n"
-            elif x == "inout":
-                p.pinmux += \
-                    mux_wire.format(cell[0], i, "wr" + cname +
-                                                "_in") + "\n"
-    # ============================================================ #
+            bwid = p.get_muxbitwidth(cellidx)
+            if bwid > 0:
+                muxcell(p, cname, x, cell, i)
+            else:
+                dedcell(p, x, cell)
 
     # ==================  Logic for dedicated pins ========= #
     p.pinmux += "\n      /*=========================================*/\n"
@@ -197,12 +193,20 @@ def init(p, ifaces):
         temp = transfn(cell[1])
         x = ifaces.getifacetype(temp)
         #print cell, temp, x
-        if x == "input":
-            p.pinmux += \
-                dedicated_wire.format(cell[0], "wr" + cell[1]) + "\n"
-        elif x == "inout":
-            p.pinmux += \
-                dedicated_wire.format(cell[0], "wr" + cell[1] + "_in") + "\n"
-        else:
-            p.pinmux += "\n"
-    # =======================================================#
+        dedcell(p, x, cell)
+
+def muxcell(p, cname, x, cell, i):
+    if x == "input":
+        p.pinmux += \
+            mux_wire.format(cell[0], i, "wr" + cname) + "\n"
+    elif x == "inout":
+        p.pinmux += \
+            mux_wire.format(cell[0], i, "wr" + cname +
+                                        "_in") + "\n"
+def dedcell(p, x, cell):
+    if x == "input":
+        p.pinmux += \
+            dedicated_wire.format(cell[0], "wr" + cell[1]) + "\n"
+    elif x == "inout":
+        p.pinmux += \
+            dedicated_wire.format(cell[0], "wr" + cell[1] + "_in") + "\n"