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)
# XXX this needs to move into interface_decl.py
# and made to use ifaceoutfmtfn and ifaceinfmtfn
-def fmt(ifaces, cell, idx, suffix=None):
+def fmt(ifaces, cells, idx, suffix=None):
""" blank entries need to output a 0 to the pin (it could just as
well be a 1 but we choose 0). reason: blank entries in
the pinmap.txt file indicate that there's nothing to choose
from. however the user may still set the muxer to that value,
and rather than throw an exception we choose to output... zero.
+
+ NOTE: IMPORTANT. when a function is an output-only there
+ is a special-case assumption that:
+ * (a) GPIO is always the first mux entry
+ * (b) GPIO's outen is also used to set the pad
+ the reason for this is that it is assumed better that
+ multiple pads be switched simutaneously to outputs
+ by setting the GPIO direction rather than having them
+ set arbitrarily by changing the muxer registers.
"""
idx += 1
- if idx < len(cell):
- cell = cell[idx]
+ if idx < len(cells):
+ cell = cells[idx]
else:
cell = ''
if not cell:
- return '0'
+ return 'val0'
temp = transfn(cell)
x = ifaces.getifacetype(temp)
if x == 'input':
- return '0' # inputs don't get passed through to the out mux
+ return 'val0' # inputs don't get passed through to the out mux
if suffix == '_outen' and x == 'out':
- return '1'
+ return "wr%s%s" % (cells[1], suffix or '') # USE GPIO FOR SELECTION
+ if x == 'out': # sigh hack, should be using interface_decl
+ suffix = ''
return "wr%s%s" % (cell, suffix or '')
# XXX this needs to move into interface_decl.py
+
+
def mkcomment(ifaces, cell, idx, outenmode=False):
""" returns a comment string for the cell when muxed
"""
return ' // unused'
temp = transfn(cname)
x = ifaces.getifacetype(temp)
- print (cname, x)
+ #print (cname, x)
if x == 'input':
return ' // %s is an input' % cname
if outenmode and x == 'inout':
def mkmux(p, ifaces, cell, suffix, outenmode):
+ """ creates a straight many-to-one muxer that accepts
+ 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)
comment = mkcomment(ifaces, cell, i + 1, outenmode)
- ret += "\t\t\t" + fmt(ifaces, cell, i + 1, suffix) # last line
+ ret += "\t\t\t" + fmt(ifaces, cell, i + 1, suffix) # last line
ret += ";%s\n" % comment
return ret
+
def init(p, ifaces):
""" generates the actual output pinmux for each io-cell. blank lines
need to output "0" to the iopad, if there is no entry in
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:
continue
temp = transfn(cname)
x = ifaces.getifacetype(temp)
- #print (cname, temp, x)
+ print (cname, temp, x)
assert x is not None, "ERROR: The signal : " + \
str(cname) + \
" of pinmap.txt isn't present \nin the current" + \
# ============================================================ #
# ================== Logic for dedicated pins ========= #
+ p.pinmux += "\n /*=========================================*/\n"
+ p.pinmux += " // dedicated cells\n\n"
for cell in p.dedicated_cells:
+ p.pinmux += " // dedicated cell idx %s\n" % (cell[0])
p.pinmux += " %s_out=%s_io;\n" % (cn(cell[0]), cell[1])
- temp = cell[1].translate(digits)
+ temp = transfn(cell[1])
x = ifaces.getifacetype(temp)
+ #print cell, temp, x
if x == "input":
- pinmux = pinmux + \
+ p.pinmux += \
dedicated_wire.format(cell[0], "wr" + cell[1]) + "\n"
elif x == "inout":
- pinmux = pinmux + \
+ p.pinmux += \
dedicated_wire.format(cell[0], "wr" + cell[1] + "_in") + "\n"
+ else:
+ p.pinmux += "\n"
# =======================================================#