Merge pull request #261 from yrabbit/dhcen-ctl

Add DHCEN primitive.

apycula/attrids.py

@@ -1210,7 +1210,7 @@
         'DIVCIBRST2':       1,
         'DIVCIBRST3':       2,
         'DIV2':             3,
-        'DIVCIBRST0':       4, 
+        'DIVCIBRST0':       4,
         'DIVCIBRST1':       5,
         'DIVCIBRST4':       6,
         'DIVCIBRST5':       7,

apycula/chipdb.py

@@ -1186,12 +1186,19 @@ def fse_create_hclk_nodes(dev, device, fse, dat: Datfile):
                 row, col = hclk_loc
                 ttyp = fse['header']['grid'][61][row][col]
                 dev.hclk_pips[(row, col)] = fse_pips(fse, ttyp, table = 48, wn = hclknames)
+                for dst in dev.hclk_pips[(row, col)].keys():
+                    # from HCLK to interbank MUX
+                    if dst in {'HCLK_BANK_OUT0', 'HCLK_BANK_OUT1'}:
+                        add_node(dev, f'HCLK{"TBLR".index(side)}_BANK_OUT{dst[-1]}', "GLOBAL_CLK", row, col, dst)
                 # connect local wires like PCLKT0 etc to the global nodes
                 for srcs in dev.hclk_pips[(row, col)].values():
                     for src in srcs.keys():
                         for pfx in _global_wire_prefixes:
                             if src.startswith(pfx):
                                 add_node(dev, src, "HCLK", row, col, src)
+                        # from interbank MUX to HCLK
+                        if src in {'HCLK_BANK_IN0', 'HCLK_BANK_IN1'}:
+                            add_node(dev, f'HCLKMUX{src[-1]}', "GLOBAL_CLK", row, col, src)
                 # strange GW1N-9C input-input aliases
                 for i in {0, 2}:
                     dev.nodes.setdefault(f'X{col}Y{row}/HCLK9-{i}', ('HCLK', {(row, col, f'HCLK_IN{i}')}))[1].add((row, col, f'HCLK_9IN{i}'))
@@ -1236,6 +1243,80 @@ def fse_create_hclk_nodes(dev, device, fse, dat: Datfile):
                             if src.startswith('HCLK'):
                                 hclks[src].add((row, col, src))
 
+# DHCEN (as I imagine) is an additional control input of the HCLK input
+# multiplexer. We have four input multiplexers - HCLK_IN0, HCLK_IN1, HCLK_IN2,
+# HCLK_IN3 (GW1N-9C with its additional four multiplexers stands separately,
+# but we will deal with it later) and two interbank inputs.
+# Creating images using IDE where we use the maximum allowable number of DHCEN,
+# the CE port of which is connected to the IO ports, then we trace the route
+# from IO to the final wire, which will be the CE port of the DHCEN primitive.
+# We are not interested in the CLKIN and CLKOUT ports because we are supposed
+# to simply disable/enable one of the input multiplexers.
+# Let's summarize the experimental data in a table.
+# There are 4 multiplexers and interbank inputs on each side of the chip
+# (sides: Right Bottom Left Top).
+_dhcen_ce = {
+        'GW1N-1':
+        {'B' : [(10, 19, 'D5'), (10, 19, 'D3'), (10, 19, 'D4'), (10, 19, 'D2'), (10,  0, 'C0'), (10,  0, 'C1')]},
+        'GW1NZ-1':
+        {'R' : [( 0, 19, 'A2'), ( 0, 19, 'A4'), ( 0, 19, 'A3'), ( 0, 19, 'A5'), ( 0, 18, 'C6'), ( 0, 18, 'C7')],
+         'T' : [(10, 19, 'A2'), (10, 19, 'A4'), (10, 19, 'A3'), (10, 19, 'A5'), (10, 19, 'C6'), (10, 19, 'C7')]},
+        'GW1NS-2':
+        {'R' : [(10, 19, 'A4'), (10, 19, 'A6'), (10, 19, 'A5'), (10, 19, 'A7'), (10, 19, 'C4'), (10, 19, 'C5')],
+         'B' : [(11, 19, 'A4'), (11, 19, 'A6'), (11, 19, 'A5'), (11, 19, 'A7'), (11, 19, 'C4'), (11, 19, 'C5')],
+         'L' : [( 9,  0, 'A0'), ( 9,  0, 'A2'), ( 9,  0, 'A1'), ( 9,  0, 'A3'), ( 9,  0, 'C0'), ( 9,  0, 'C1')],
+         'T' : [( 0, 19, 'D5'), ( 0, 19, 'D3'), ( 0, 19, 'D4'), ( 0, 19, 'D2'), ( 0,  0, 'B1'), ( 0,  0, 'B0')]},
+        'GW1N-4':
+        {'R' : [(18, 37, 'C6'), (18, 37, 'D7'), (18, 37, 'C7'), (18, 37, 'D6'), ( 0, 37, 'D7'), ( 0, 37, 'D6')],
+         'B' : [(19, 37, 'A2'), (19, 37, 'A4'), (19, 37, 'A3'), (19, 37, 'A5'), (19,  0, 'B2'), (19,  0, 'B3')],
+         'L' : [(18,  0, 'C6'), (18,  0, 'D7'), (18,  0, 'C7'), (18,  0, 'D6'), (19,  0, 'A4'), ( 0,  0, 'B1')]},
+        'GW1NS-4':
+        {'R' : [(18, 37, 'C6'), (18, 37, 'D7'), (18, 37, 'C7'), (18, 37, 'D6'), ( 0, 37, 'D7'), ( 0, 37, 'D6')],
+         'B' : [(19, 37, 'A2'), (19, 37, 'A4'), (19, 37, 'A3'), (19, 37, 'A5'), (19,  0, 'B2'), (19,  0, 'B3')],
+         'T' : [( 1,  0, 'B6'), ( 1,  0, 'A0'), ( 1,  0, 'B7'), ( 1,  0, 'A1'), ( 1,  0, 'C4'), ( 1,  0, 'C3')]},
+        'GW1N-9':
+        {'R' : [(18, 46, 'C6'), (18, 46, 'D7'), (18, 46, 'C7'), (18, 46, 'D6'), (18, 46, 'B6'), (18, 46, 'B7')],
+         'B' : [(28, 46, 'A2'), (28, 46, 'A4'), (28, 46, 'A3'), (28, 46, 'A5'), (28,  0, 'B2'), (28,  0, 'B3')],
+         'L' : [(18,  0, 'C6'), (18,  0, 'D7'), (18,  0, 'C7'), (18,  0, 'D6'), (18,  0, 'B6'), (18,  0, 'B7')],
+         'T' : [( 9,  0, 'C6'), ( 9,  0, 'D7'), ( 9,  0, 'C7'), ( 9,  0, 'D6'), ( 9,  0, 'B6'), ( 9,  0, 'B7')]},
+        'GW1N-9C':
+        {'R' : [(18, 46, 'C6'), (18, 46, 'D7'), (18, 46, 'C7'), (18, 46, 'D6'), (18, 46, 'B6'), (18, 46, 'B7')],
+         'B' : [(28, 46, 'A2'), (28, 46, 'A4'), (28, 46, 'A3'), (28, 46, 'A5'), (28,  0, 'B2'), (28,  0, 'B3')],
+         'L' : [(18,  0, 'C6'), (18,  0, 'D7'), (18,  0, 'C7'), (18,  0, 'D6'), (18,  0, 'B6'), (18,  0, 'B7')],
+         'T' : [( 9,  0, 'C6'), ( 9,  0, 'D7'), ( 9,  0, 'C7'), ( 9,  0, 'D6'), ( 9,  0, 'B6'), ( 9,  0, 'B7')]},
+        'GW2A-18':
+        {'R' : [(27, 55, 'A2'), (27, 55, 'A3'), (27, 55, 'D2'), (27, 55, 'D3'), (27, 55, 'D0'), (27, 55, 'D1')],
+         'B' : [(54, 27, 'A2'), (54, 27, 'A3'), (54, 27, 'D2'), (54, 27, 'D3'), (54, 27, 'D0'), (54, 27, 'D1')],
+         'L' : [(27,  0, 'A2'), (27,  0, 'A3'), (27,  0, 'D2'), (27,  0, 'D3'), (27,  0, 'D0'), (27,  0, 'D1')],
+         'T' : [( 0, 27, 'A2'), ( 0, 27, 'A3'), ( 0, 27, 'D2'), ( 0, 27, 'D3'), (  0,27, 'D0'), ( 0, 27, 'D1')]},
+        'GW2A-18C':
+        {'R' : [(27, 55, 'A2'), (27, 55, 'A3'), (27, 55, 'D2'), (27, 55, 'D3'), (27, 55, 'D0'), (27, 55, 'D1')],
+         'B' : [(54, 27, 'A2'), (54, 27, 'A3'), (54, 27, 'D2'), (54, 27, 'D3'), (54, 27, 'D0'), (54, 27, 'D1')],
+         'L' : [(27,  0, 'A2'), (27,  0, 'A3'), (27,  0, 'D2'), (27,  0, 'D3'), (27,  0, 'D0'), (27,  0, 'D1')],
+         'T' : [( 0, 27, 'A2'), ( 0, 27, 'A3'), ( 0, 27, 'D2'), ( 0, 27, 'D3'), (  0,27, 'D0'), ( 0, 27, 'D1')]},
+        }
+def fse_create_dhcen(dev, device, fse, dat: Datfile):
+    if device not in _dhcen_ce:
+        print(f'No DHCEN for {device} for now.')
+        return
+    for side, ces in _dhcen_ce[device].items():
+        for idx, ce_wire in enumerate(ces):
+            row, col, wire = ce_wire
+            extra = dev.extra_func.setdefault((row, col), {})
+            dhcen = extra.setdefault('dhcen', [])
+            # use db.hclk_pips in order to find HCLK_IN cells
+            for hclk_loc in _hclk_to_fclk[device][side]['hclk']:
+                if idx < 4:
+                    hclk_name = f'HCLK_IN{idx}'
+                else:
+                    hclk_name = f'HCLK_BANK_OUT{idx - 4}'
+                if hclk_name in dev.hclk_pips[hclk_loc]:
+                    hclkin = {'pip' : [f'X{hclk_loc[1]}Y{hclk_loc[0]}', hclk_name, next(iter(dev.hclk_pips[hclk_loc][hclk_name].keys())), side]}
+
+            hclkin.update({ 'ce' : wire})
+            dhcen.append(hclkin)
+
+
 _pll_loc = {
  'GW1N-1':
    {'TRPLL0CLK0': (0, 17, 'F4'), 'TRPLL0CLK1': (0, 17, 'F5'),
@@ -1488,6 +1569,7 @@ def fse_create_clocks(dev, device, dat: Datfile, fse):
 
 
     spines = {f'SPINE{i}' for i in range(32)}
+    hclk_srcs = {f'HCLK{i}_BANK_OUT{j}' for i in range(4) for j in range(2)}
     dcs_inputs = {f'P{i}{j}{k}' for i in range(1, 5) for j in range(6, 8) for k in "ABCD"}
     for row, rd in enumerate(dev.grid):
         for col, rc in enumerate(rd):
@@ -1499,6 +1581,12 @@ def fse_create_clocks(dev, device, dat: Datfile, fse):
                     add_node(dev, dest, "GLOBAL_CLK", row, col, dest)
                     for src in { wire for wire in srcs.keys() if wire not in {'VCC', 'VSS'}}:
                         add_node(dev, src, "GLOBAL_CLK", row, col, src)
+                elif dest in {'HCLKMUX0', 'HCLKMUX1'}:
+                    # this interbank communication between HCLKs
+                    add_node(dev, dest, "GLOBAL_CLK", row, col, dest)
+                    for src in {wire for wire in srcs.keys() if wire in hclk_srcs}:
+                        add_node(dev, src, "GLOBAL_CLK", row, col, src)
+
     # GBx0 <- GBOx
     for spine_pair in range(4): # GB00/GB40, GB10/GB50, GB20/GB60, GB30/GB70
         tap_start = _clock_data[device]['tap_start'][0]
@@ -2088,6 +2176,7 @@ def from_fse(device, fse, dat: Datfile):
     fse_create_bandgap(dev, device)
     fse_create_userflash(dev, device, dat)
     fse_create_logic2clk(dev, device, dat)
+    fse_create_dhcen(dev, device, fse, dat)
     disable_plls(dev, device)
     sync_extra_func(dev)
     set_chip_flags(dev, device);
@@ -3487,6 +3576,8 @@ def fse_wire_delays(db):
         db.wire_delay[clknames[i]] = "CENT_SPINE_PCLK"
     for i in range(129, 153): # clock inputs (logic->clock)
         db.wire_delay[clknames[i]] = "CENT_SPINE_PCLK"
+    for i in range(1000, 1010): # HCLK
+        db.wire_delay[clknames[i]] = "X0" # XXX
 
 # assign pads with plls
 # for now use static table and store the bel name although it is always PLL without a number

apycula/gowin_pack.py

@@ -185,7 +185,7 @@ def get_bits(init_data):
 def get_bels(data):
     later = []
     if is_himbaechel:
-        belre = re.compile(r"X(\d+)Y(\d+)/(?:GSR|LUT|DFF|IOB|MUX|ALU|ODDR|OSC[ZFHWO]?|BUF[GS]|RAM16SDP4|RAM16SDP2|RAM16SDP1|PLL|IOLOGIC|CLKDIV2|CLKDIV|BSRAM|ALU|MULTALU18X18|MULTALU36X18|MULTADDALU18X18|MULT36X36|MULT18X18|MULT9X9|PADD18|PADD9|BANDGAP|DQCE|DCS|USERFLASH)(\w*)")
+        belre = re.compile(r"X(\d+)Y(\d+)/(?:GSR|LUT|DFF|IOB|MUX|ALU|ODDR|OSC[ZFHWO]?|BUF[GS]|RAM16SDP4|RAM16SDP2|RAM16SDP1|PLL|IOLOGIC|CLKDIV2|CLKDIV|BSRAM|ALU|MULTALU18X18|MULTALU36X18|MULTADDALU18X18|MULT36X36|MULT18X18|MULT9X9|PADD18|PADD9|BANDGAP|DQCE|DCS|USERFLASH|DHCEN)(\w*)")
     else:
         belre = re.compile(r"R(\d+)C(\d+)_(?:GSR|SLICE|IOB|MUX2_LUT5|MUX2_LUT6|MUX2_LUT7|MUX2_LUT8|ODDR|OSC[ZFHWO]?|BUFS|RAMW|rPLL|PLLVR|IOLOGIC)(\w*)")
 
@@ -1989,6 +1989,43 @@ def set_osc_attrs(db, typ, params):
         add_attr_val(db, 'OSC', fin_attrs, attrids.osc_attrids[attr], val)
     return fin_attrs
 
+_wire2attr_val = {
+        'HCLK_IN0': ('HSB0MUX0_HSTOP', 'HCLKCIBSTOP0'),
+        'HCLK_IN1': ('HSB1MUX0_HSTOP', 'HCLKCIBSTOP2'),
+        'HCLK_IN2': ('HSB0MUX1_HSTOP', 'HCLKCIBSTOP1'),
+        'HCLK_IN3': ('HSB1MUX1_HSTOP', 'HCLKCIBSTOP3'),
+        'HCLK_BANK_OUT0': ('BRGMUX0_BRGSTOP', 'BRGCIBSTOP0'),
+        'HCLK_BANK_OUT1': ('BRGMUX1_BRGSTOP', 'BRGCIBSTOP1'),
+        }
+def find_and_set_dhcen_hclk_fuses(db, tilemap, wire, side):
+    fin_attrs = set()
+    attr, attr_val = _wire2attr_val[wire]
+    val = attrids.hclk_attrvals[attr_val]
+    add_attr_val(db, 'HCLK', fin_attrs, attrids.hclk_attrids[attr], val)
+
+    def set_fuse():
+        ttyp = db.grid[row][col].ttyp
+        if 'HCLK' in db.shortval[ttyp]:
+            bits = get_shortval_fuses(db, ttyp, fin_attrs, "HCLK")
+            tile = tilemap[row, col]
+            for r, c in bits:
+                tile[r][c] = 1
+
+    if side in "TB":
+        if side == 'T':
+            row = 0
+        else:
+            row = db.rows - 1
+        for col in range(db.cols):
+            set_fuse()
+    else:
+        if side == 'L':
+            col = 0
+        else:
+            col = db.cols - 1
+        for row in range(db.rows):
+            set_fuse()
+
 def bin_str_to_dec(str_val):
     bin_pattern = r'^[0,1]+'
     bin_str = re.findall(bin_pattern, str_val)
@@ -2035,7 +2072,6 @@ def set_hclk_attrs(db, params, num, typ, cell_name):
         add_attr_val(db, 'HCLK', fin_attrs, attrids.hclk_attrids[attr], val)
     return fin_attrs
 
-
 _iologic_default_attrs = {
         'DUMMY': {},
         'IOLOGIC': {},
@@ -2502,9 +2538,19 @@ def place(db, tilemap, bels, cst, args):
             cfg_tile = tilemap[(0, 37)]
             for r, c in bits:
                 cfg_tile[r][c] = 1
+        elif typ == "DHCEN":
+            if 'DHCEN_USED' not in attrs:
+                continue
+            # DHCEN as such is just a control wire and does not have a fuse
+            # itself, but HCLK has fuses that allow this control. Here we look
+            # for the corresponding HCLK and set its fuses.
+            _, wire, _, side = db.extra_func[row - 1, col -1]['dhcen'][int(num)]['pip']
+            hclk_attrs = find_and_set_dhcen_hclk_fuses(db, tilemap, wire, side)
         elif typ in ["CLKDIV", "CLKDIV2"]:
             hclk_attrs = set_hclk_attrs(db, parms, num, typ, cellname)
             bits = get_shortval_fuses(db, tiledata.ttyp, hclk_attrs, "HCLK")
+            for r, c in bits:
+                tile[r][c] = 1
         elif typ == 'DQCE':
             # Himbaechel only
             pipre = re.compile(r"X(\d+)Y(\d+)/([\w_]+)/([\w_]+)")
@@ -2693,6 +2739,17 @@ def secure_long_wires(db, tilemap, row, col, src, dest):
                 for row, col in bits:
                     tile[row][col] = 1
 
+# hclk interbank requires to set some non-route fuses
+def do_hclk_banks(db, row, col, src, dest):
+    res = set()
+    if dest in {'HCLK_BANK_OUT0', 'HCLK_BANK_OUT1'}:
+        fin_attrs = set()
+        add_attr_val(db, 'HCLK', fin_attrs, attrids.hclk_attrids[f'BRGMUX{dest[-1]}_BRGOUT'], attrids.hclk_attrvals['ENABLE'])
+
+        ttyp = db.grid[row][col].ttyp
+        if 'HCLK' in db.shortval[ttyp]:
+            res = get_shortval_fuses(db, ttyp, fin_attrs, "HCLK")
+    return res
 
 def route(db, tilemap, pips):
     for row, col, src, dest in pips:
@@ -2704,6 +2761,7 @@ def route(db, tilemap, pips):
                 bits = tiledata.clock_pips[dest][src]
             elif is_himbaechel and (row - 1, col - 1) in db.hclk_pips and dest in db.hclk_pips[row - 1, col - 1]:
                 bits = db.hclk_pips[row - 1, col - 1][dest][src]
+                bits.update(do_hclk_banks(db, row - 1, col - 1, src, dest))
             else:
                 bits = tiledata.pips[dest][src]
         except KeyError:

apycula/wirenames.py

@@ -119,19 +119,31 @@
 })
 
 clknames.update({n: f"UNK{n}" for n in range(210, 261)})
+
+# HCLK->clock network
+# Each HCLK can connect to other HCLKs through two MUXes in the clock system.
+# Here we assign numbers to these MUXes and their inputs - two per HCLK
+clknames.update({
+    1000: 'HCLKMUX0', 1001: 'HCLKMUX1',
+    1002: 'HCLK0_BANK_OUT0', 1003: 'HCLK0_BANK_OUT1',
+    1004: 'HCLK1_BANK_OUT0', 1005: 'HCLK1_BANK_OUT1',
+    1006: 'HCLK2_BANK_OUT0', 1007: 'HCLK2_BANK_OUT1',
+    1008: 'HCLK3_BANK_OUT0', 1009: 'HCLK3_BANK_OUT1',
+})
+
 clknumbers = {v: k for k, v in clknames.items()}
 
 # hclk
 hclknames = clknames.copy()
 hclknames.update({n: f"HCLK_UNK{n}" for n in range(26)})
 # inputs
 hclknames.update({
-    2: 'HCLK_IN0', 3: 'HCLK_IN1', 4: 'HCLK_IN2', 5: 'HCLK_IN3'
+    2: 'HCLK_IN0', 3: 'HCLK_IN1', 4: 'HCLK_IN2', 5: 'HCLK_IN3', 8: 'HCLK_BANK_IN0', 9: 'HCLK_BANK_IN1'
 })
 
 # HCLK section inputs
 hclknames.update({
-    10: 'HCLK0_SECT0_IN', 11: 'HCLK0_SECT1_IN', 12: 'HCLK1_SECT0_IN', 13: 'HCLK1_SECT1_IN'
+    6: 'HCLK_BANK_OUT0', 7: 'HCLK_BANK_OUT1', 10: 'HCLK0_SECT0_IN', 11: 'HCLK0_SECT1_IN', 12: 'HCLK1_SECT0_IN', 13: 'HCLK1_SECT1_IN'
 })
 
 # Bypass connections from HCLK_IN to HCLK_OUT

examples/himbaechel/Makefile.himbaechel

@@ -6,7 +6,7 @@ NEXTPNR ?= nextpnr-himbaechel
 all: \
 	blinky-tangnano20k.fs shift-tangnano20k.fs blinky-tbuf-tangnano20k.fs blinky-oddr-tangnano20k.fs \
 	blinky-osc-tangnano20k.fs tlvds-tangnano20k.fs elvds-tangnano20k.fs oddr-tlvds-tangnano20k.fs \
-	blinky-clkdiv-tangnano20k.fs dvi-example-tangnano20k.fs\
+	blinky-clkdiv-tangnano20k.fs dvi-example-tangnano20k.fs blinky-clkdiv-dhcen-tangnano20k.fs \
 	oddr-elvds-tangnano20k.fs pll-nanolcd-tangnano20k.fs attosoc-tangnano20k.fs \
 	oser4-tangnano20k.fs ovideo-tangnano20k.fs oser8-tangnano20k.fs oser10-tangnano20k.fs \
 	ides4-tangnano20k.fs ivideo-tangnano20k.fs ides8-tangnano20k.fs ides10-tangnano20k.fs \
@@ -21,7 +21,7 @@ all: \
 	\
 	blinky-primer20k.fs shift-primer20k.fs blinky-tbuf-primer20k.fs blinky-oddr-primer20k.fs \
 	blinky-osc-primer20k.fs tlvds-primer20k.fs elvds-primer20k.fs oddr-tlvds-primer20k.fs \
-	blinky-clkdiv-primer20k.fs dvi-example-primer20k.fs\
+	blinky-clkdiv-primer20k.fs dvi-example-primer20k.fs blinky-clkdiv-dhcen-primer20k.fs \
 	oddr-elvds-primer20k.fs pll-nanolcd-primer20k.fs attosoc-primer20k.fs \
 	oser4-primer20k.fs ovideo-primer20k.fs oser8-primer20k.fs oser10-primer20k.fs \
 	ides4-primer20k.fs ivideo-primer20k.fs ides8-primer20k.fs ides10-primer20k.fs \

examples/himbaechel/blinky-clkdiv-dhcen.v

@@ -0,0 +1,83 @@
+module top (
+	input clk,
+	input key_i,
+	output [`LEDS_NR-1:0] led
+);
+
+/* Expected Result: 
+    - 1 or 2 LEDs blinking, depending on your board.
+    - The `faster` LED is associated with the input clock.
+    - The `slower` LED is associated with a divided clock.
+    - On boards with multiple CLKDIVs, the slower LED's blink rate changes as it cycles through CLKDIVs
+      configured with different DIV_MODES.
+    - If your board has only one LED, it should blink with the divided clock.
+    - Holding the appropriate button should stop the blinking.
+*/
+
+localparam /*string*/ DIV_MODE_2 = "2";
+localparam /*string*/ DIV_MODE_35 = "3.5";
+localparam /*string*/ DIV_MODE_4 = "4";
+localparam /*string*/ DIV_MODE_5 = "5";
+
+
+wire key = key_i ^ `INV_BTN;
+
+reg [25:0] ctr_q;
+wire [25:0] ctr_d;
+// localparam NUM_HCLKi=NUM_HCLK;
+
+wire [`NUM_HCLK-1:0] hclk_counts;
+reg [$clog2(`NUM_HCLK)-1:0] curr_hclk_idx; 
+wire curr_hclk; 
+reg [30:0] sup_count; 
+
+
+wire managed_clk;
+DHCEN dhcen(
+	.CLKIN(clk),
+	.CE(key),
+	.CLKOUT(managed_clk)
+);
+
+genvar i;
+generate 
+    for (i=0; i < `NUM_HCLK; i=i+1) begin:hcount
+        localparam /*string*/ div_mode =(i % 4 == 0) ? DIV_MODE_5 :
+                                        (i % 4 == 1) ? DIV_MODE_4 :
+                                        (i % 4 == 2) ? DIV_MODE_35 :
+                                                       DIV_MODE_2;
+
+        wire div2_out; 
+        wire o_clk;
+
+        CLKDIV2 my_div2 (
+            .RESETN(1'b1),
+            .HCLKIN(managed_clk),
+            .CLKOUT(div2_out)
+        );
+
+        CLKDIV #(.DIV_MODE(div_mode)) my_div (
+            .RESETN(1'b1),
+            .HCLKIN(div2_out),
+            .CLKOUT(o_clk) 
+        );
+
+        reg [23:0] count;
+        always @(posedge o_clk)begin
+            count <= count + 1'b1;
+        end
+        assign hclk_counts[i] = count[23]; 
+    end
+endgenerate
+
+always @(posedge clk) begin
+    sup_count <= sup_count + 1'b1;
+    curr_hclk_idx <= curr_hclk_idx + sup_count[29];
+    if (curr_hclk_idx == `NUM_HCLK-1)
+        curr_hclk_idx <= 0;
+end
+
+assign curr_hclk = hclk_counts[curr_hclk_idx];
+assign led = {curr_hclk, sup_count[23]}; 
+
+endmodule