added I2C and SPI for u4k to database

4 files changed, 731 insertions, 0 deletions

diff --git a/icebox/icebox.py b/icebox/icebox.py
index ab83fd0..a7631a2 100644
--- a/icebox/icebox.py
+++ b/icebox/icebox.py
@@ -5786,6 +5786,198 @@ extra_cells_db = {
     },
 
     "u4k" : {
+        ("SPI", (0, 0, 0)): {
+            "MCSNO0":                (0, 3, "slf_op_1"), 
+            "MCSNO1":                (0, 3, "slf_op_3"), 
+            "MCSNO2":                (0, 3, "slf_op_6"), 
+            "MCSNO3":                (0, 4, "slf_op_0"), 
+            "MCSNOE0":               (0, 3, "slf_op_2"), 
+            "MCSNOE1":               (0, 3, "slf_op_4"), 
+            "MCSNOE2":               (0, 3, "slf_op_7"), 
+            "MCSNOE3":               (0, 4, "slf_op_1"), 
+            "MI":                    (0, 2, "lutff_0/in_1"), 
+            "MO":                    (0, 2, "slf_op_5"), 
+            "MOE":                   (0, 2, "slf_op_6"), 
+            "SBACKO":                (0, 2, "slf_op_0"), 
+            "SBADRI0":               (0, 1, "lutff_1/in_1"), 
+            "SBADRI1":               (0, 1, "lutff_2/in_1"), 
+            "SBADRI2":               (0, 2, "lutff_0/in_3"), 
+            "SBADRI3":               (0, 2, "lutff_1/in_3"), 
+            "SBADRI4":               (0, 2, "lutff_2/in_3"), 
+            "SBADRI5":               (0, 2, "lutff_3/in_3"), 
+            "SBADRI6":               (0, 2, "lutff_4/in_3"), 
+            "SBADRI7":               (0, 2, "lutff_5/in_3"), 
+            "SBCLKI":                (0, 1, "clk"), 
+            "SBDATI0":               (0, 1, "lutff_1/in_3"), 
+            "SBDATI1":               (0, 1, "lutff_2/in_3"), 
+            "SBDATI2":               (0, 1, "lutff_3/in_3"), 
+            "SBDATI3":               (0, 1, "lutff_4/in_3"), 
+            "SBDATI4":               (0, 1, "lutff_5/in_3"), 
+            "SBDATI5":               (0, 1, "lutff_6/in_3"), 
+            "SBDATI6":               (0, 1, "lutff_7/in_3"), 
+            "SBDATI7":               (0, 1, "lutff_0/in_1"), 
+            "SBDATO0":               (0, 1, "slf_op_0"), 
+            "SBDATO1":               (0, 1, "slf_op_1"), 
+            "SBDATO2":               (0, 1, "slf_op_2"), 
+            "SBDATO3":               (0, 1, "slf_op_3"), 
+            "SBDATO4":               (0, 1, "slf_op_4"), 
+            "SBDATO5":               (0, 1, "slf_op_5"), 
+            "SBDATO6":               (0, 1, "slf_op_6"), 
+            "SBDATO7":               (0, 1, "slf_op_7"), 
+            "SBRWI":                 (0, 1, "lutff_0/in_3"), 
+            "SBSTBI":                (0, 2, "lutff_6/in_3"), 
+            "SCKI":                  (0, 2, "lutff_1/in_1"), 
+            "SCKO":                  (0, 2, "slf_op_7"), 
+            "SCKOE":                 (0, 3, "slf_op_0"), 
+            "SCSNI":                 (0, 2, "lutff_2/in_1"), 
+            "SI":                    (0, 2, "lutff_7/in_3"), 
+            "SO":                    (0, 2, "slf_op_3"), 
+            "SOE":                   (0, 2, "slf_op_4"), 
+            "SPIIRQ":                (0, 2, "slf_op_1"), 
+            "SPIWKUP":               (0, 2, "slf_op_2"), 
+            "SPI_ENABLE_0":          (7, 0, "cbit2usealt_in_0"), 
+            "SPI_ENABLE_1":          (6, 0, "cbit2usealt_in_0"), 
+            "SPI_ENABLE_2":          (7, 0, "cbit2usealt_in_1"), 
+            "SPI_ENABLE_3":          (6, 0, "cbit2usealt_in_1"), 
+        },
+        ("SPI", (25, 0, 1)): {
+            "MCSNO0":                (25, 3, "slf_op_1"), 
+            "MCSNO1":                (25, 3, "slf_op_3"), 
+            "MCSNO2":                (25, 3, "slf_op_6"), 
+            "MCSNO3":                (25, 4, "slf_op_0"), 
+            "MCSNOE0":               (25, 3, "slf_op_2"), 
+            "MCSNOE1":               (25, 3, "slf_op_4"), 
+            "MCSNOE2":               (25, 3, "slf_op_7"), 
+            "MCSNOE3":               (25, 4, "slf_op_1"), 
+            "MI":                    (25, 2, "lutff_0/in_1"), 
+            "MO":                    (25, 2, "slf_op_5"), 
+            "MOE":                   (25, 2, "slf_op_6"), 
+            "SBACKO":                (25, 2, "slf_op_0"), 
+            "SBADRI0":               (25, 1, "lutff_1/in_1"), 
+            "SBADRI1":               (25, 1, "lutff_2/in_1"), 
+            "SBADRI2":               (25, 2, "lutff_0/in_3"), 
+            "SBADRI3":               (25, 2, "lutff_1/in_3"), 
+            "SBADRI4":               (25, 2, "lutff_2/in_3"), 
+            "SBADRI5":               (25, 2, "lutff_3/in_3"), 
+            "SBADRI6":               (25, 2, "lutff_4/in_3"), 
+            "SBADRI7":               (25, 2, "lutff_5/in_3"), 
+            "SBCLKI":                (25, 1, "clk"), 
+            "SBDATI0":               (25, 1, "lutff_1/in_3"), 
+            "SBDATI1":               (25, 1, "lutff_2/in_3"), 
+            "SBDATI2":               (25, 1, "lutff_3/in_3"), 
+            "SBDATI3":               (25, 1, "lutff_4/in_3"), 
+            "SBDATI4":               (25, 1, "lutff_5/in_3"), 
+            "SBDATI5":               (25, 1, "lutff_6/in_3"), 
+            "SBDATI6":               (25, 1, "lutff_7/in_3"), 
+            "SBDATI7":               (25, 1, "lutff_0/in_1"), 
+            "SBDATO0":               (25, 1, "slf_op_0"), 
+            "SBDATO1":               (25, 1, "slf_op_1"), 
+            "SBDATO2":               (25, 1, "slf_op_2"), 
+            "SBDATO3":               (25, 1, "slf_op_3"), 
+            "SBDATO4":               (25, 1, "slf_op_4"), 
+            "SBDATO5":               (25, 1, "slf_op_5"), 
+            "SBDATO6":               (25, 1, "slf_op_6"), 
+            "SBDATO7":               (25, 1, "slf_op_7"), 
+            "SBRWI":                 (25, 1, "lutff_0/in_3"), 
+            "SBSTBI":                (25, 2, "lutff_6/in_3"), 
+            "SCKI":                  (25, 2, "lutff_1/in_1"), 
+            "SCKO":                  (25, 2, "slf_op_7"), 
+            "SCKOE":                 (25, 3, "slf_op_0"), 
+            "SCSNI":                 (25, 2, "lutff_2/in_1"), 
+            "SI":                    (25, 2, "lutff_7/in_3"), 
+            "SO":                    (25, 2, "slf_op_3"), 
+            "SOE":                   (25, 2, "slf_op_4"), 
+            "SPIIRQ":                (25, 2, "slf_op_1"), 
+            "SPIWKUP":               (25, 2, "slf_op_2"), 
+            "SPI_ENABLE_0":          (24, 0, "cbit2usealt_in_0"), 
+            "SPI_ENABLE_1":          (24, 0, "cbit2usealt_in_1"), 
+            "SPI_ENABLE_2":          (23, 0, "cbit2usealt_in_0"), 
+            "SPI_ENABLE_3":          (23, 0, "cbit2usealt_in_1"), 
+        },
+        ("I2C", (0, 21, 0)): {
+            "I2CIRQ":                (0, 20, "slf_op_7"), 
+            "I2CWKUP":               (0, 19, "slf_op_5"), 
+            "I2C_ENABLE_0":          (13, 21, "cbit2usealt_in_0"), 
+            "I2C_ENABLE_1":          (12, 21, "cbit2usealt_in_1"), 
+            "SBACKO":                (0, 20, "slf_op_6"), 
+            "SBADRI0":               (0, 20, "lutff_1/in_0"), 
+            "SBADRI1":               (0, 20, "lutff_2/in_0"), 
+            "SBADRI2":               (0, 20, "lutff_3/in_0"), 
+            "SBADRI3":               (0, 20, "lutff_4/in_0"), 
+            "SBADRI4":               (0, 20, "lutff_5/in_0"), 
+            "SBADRI5":               (0, 20, "lutff_6/in_0"), 
+            "SBADRI6":               (0, 20, "lutff_7/in_0"), 
+            "SBADRI7":               (0, 19, "lutff_2/in_0"), 
+            "SBCLKI":                (0, 20, "clk"), 
+            "SBDATI0":               (0, 19, "lutff_5/in_0"), 
+            "SBDATI1":               (0, 19, "lutff_6/in_0"), 
+            "SBDATI2":               (0, 19, "lutff_7/in_0"), 
+            "SBDATI3":               (0, 20, "lutff_0/in_3"), 
+            "SBDATI4":               (0, 20, "lutff_5/in_1"), 
+            "SBDATI5":               (0, 20, "lutff_6/in_1"), 
+            "SBDATI6":               (0, 20, "lutff_7/in_1"), 
+            "SBDATI7":               (0, 20, "lutff_0/in_0"), 
+            "SBDATO0":               (0, 19, "slf_op_6"), 
+            "SBDATO1":               (0, 19, "slf_op_7"), 
+            "SBDATO2":               (0, 20, "slf_op_0"), 
+            "SBDATO3":               (0, 20, "slf_op_1"), 
+            "SBDATO4":               (0, 20, "slf_op_2"), 
+            "SBDATO5":               (0, 20, "slf_op_3"), 
+            "SBDATO6":               (0, 20, "slf_op_4"), 
+            "SBDATO7":               (0, 20, "slf_op_5"), 
+            "SBRWI":                 (0, 19, "lutff_4/in_0"), 
+            "SBSTBI":                (0, 19, "lutff_3/in_0"), 
+            "SCLI":                  (0, 19, "lutff_2/in_1"), 
+            "SCLO":                  (0, 19, "slf_op_3"), 
+            "SCLOE":                 (0, 19, "slf_op_4"), 
+            "SDAI":                  (0, 19, "lutff_1/in_1"), 
+            "SDAO":                  (0, 19, "slf_op_1"), 
+            "SDAOE":                 (0, 19, "slf_op_2"), 
+            "SDA_INPUT_DELAYED":     (12, 21, "SDA_input_delay"), 
+            "SDA_OUTPUT_DELAYED":    (12, 21, "SDA_output_delay"), 
+        },
+        ("I2C", (25, 21, 0)): {
+            "I2CIRQ":                (25, 20, "slf_op_7"), 
+            "I2CWKUP":               (25, 19, "slf_op_5"), 
+            "I2C_ENABLE_0":          (19, 21, "cbit2usealt_in_1"), 
+            "I2C_ENABLE_1":          (19, 21, "cbit2usealt_in_0"), 
+            "SBACKO":                (25, 20, "slf_op_6"), 
+            "SBADRI0":               (25, 20, "lutff_1/in_0"), 
+            "SBADRI1":               (25, 20, "lutff_2/in_0"), 
+            "SBADRI2":               (25, 20, "lutff_3/in_0"), 
+            "SBADRI3":               (25, 20, "lutff_4/in_0"), 
+            "SBADRI4":               (25, 20, "lutff_5/in_0"), 
+            "SBADRI5":               (25, 20, "lutff_6/in_0"), 
+            "SBADRI6":               (25, 20, "lutff_7/in_0"), 
+            "SBADRI7":               (25, 19, "lutff_2/in_0"), 
+            "SBCLKI":                (25, 20, "clk"), 
+            "SBDATI0":               (25, 19, "lutff_5/in_0"), 
+            "SBDATI1":               (25, 19, "lutff_6/in_0"), 
+            "SBDATI2":               (25, 19, "lutff_7/in_0"), 
+            "SBDATI3":               (25, 20, "lutff_0/in_3"), 
+            "SBDATI4":               (25, 20, "lutff_5/in_1"), 
+            "SBDATI5":               (25, 20, "lutff_6/in_1"), 
+            "SBDATI6":               (25, 20, "lutff_7/in_1"), 
+            "SBDATI7":               (25, 20, "lutff_0/in_0"), 
+            "SBDATO0":               (25, 19, "slf_op_6"), 
+            "SBDATO1":               (25, 19, "slf_op_7"), 
+            "SBDATO2":               (25, 20, "slf_op_0"), 
+            "SBDATO3":               (25, 20, "slf_op_1"), 
+            "SBDATO4":               (25, 20, "slf_op_2"), 
+            "SBDATO5":               (25, 20, "slf_op_3"), 
+            "SBDATO6":               (25, 20, "slf_op_4"), 
+            "SBDATO7":               (25, 20, "slf_op_5"), 
+            "SBRWI":                 (25, 19, "lutff_4/in_0"), 
+            "SBSTBI":                (25, 19, "lutff_3/in_0"), 
+            "SCLI":                  (25, 19, "lutff_2/in_1"), 
+            "SCLO":                  (25, 19, "slf_op_3"), 
+            "SCLOE":                 (25, 19, "slf_op_4"), 
+            "SDAI":                  (25, 19, "lutff_1/in_1"), 
+            "SDAO":                  (25, 19, "slf_op_1"), 
+            "SDAOE":                 (25, 19, "slf_op_2"), 
+            "SDA_INPUT_DELAYED":     (19, 21, "SDA_input_delay"), 
+            "SDA_OUTPUT_DELAYED":    (19, 21, "SDA_output_delay"), 
+        },
         ("HFOSC", (0, 21, 1)) : {
             "CLKHFPU":                      (0, 19, "lutff_0/in_1"),
             "CLKHFEN":                      (0, 19, "lutff_7/in_3"),
diff --git a/icefuzz/tests/ip/trace_ip_u4k.py b/icefuzz/tests/ip/trace_ip_u4k.py
new file mode 100755
index 0000000..8e94faf
--- /dev/null
+++ b/icefuzz/tests/ip/trace_ip_u4k.py
@@ -0,0 +1,347 @@
+#!/usr/bin/env python3
+
+import os, sys, re
+
+device = "u4k"
+
+pins =  "2 3 4 6 9 10 11 12 13 14 15 16 17 18 19 20 21 23 25 26 27 28 31 32 34 35 36 37 38 42 43 44 45 46 47 48".split()
+#up5k
+# pins = "2 3 4 6 9 10 11 12 13 18 19 20 21 25 26 27 28 31 32 34 35 36 37 38 42 43 44 45 46 47 48".split()
+
+# This is the master IP reverse engineering script for three similar IPs: I2C, SPI
+ip_types = ["I2C", "SPI"]
+ip_locs = { }
+ip_locs["I2C"] = [(0, 21, 0), (25, 21, 0)]
+ip_locs["SPI"] = [(0, 0, 0), (25, 0, 1)]
+#spram_locs = [(0, 0, 1)]
+ip_data = { }
+
+#up5k
+# ip_types = ["I2C", "SPI", "LEDDA_IP"]
+# ip_locs = { }
+# ip_locs["I2C"] = [(0, 31, 0), (25, 31, 0)]
+# ip_locs["SPI"] = [(0, 0, 0), (25, 0, 1)]
+# ip_locs["LEDDA_IP"] = [(0, 31, 2)]
+# #spram_locs = [(0, 0, 1)]
+# ip_data = { }
+
+#signals[x][0] -> inputs, signals[x][1] ->outputs
+ip_signals = {}
+ip_signals["I2C"] = [["SBCLKI", "SBRWI", "SBSTBI", "SCLI", "SDAI"], 
+                     ["SBACKO", "I2CIRQ", "I2CWKUP", "SCLO", "SCLOE", "SDAO", "SDAOE"]]
+ip_signals["SPI"] = [["SBCLKI", "SBRWI", "SBSTBI", "MI", "SI", "SCKI", "SCSNI"],
+                     ["SBACKO", "SPIIRQ", "SPIWKUP", "SO", "SOE", "MO", "MOE", "SCKO", "SCKOE"]]
+
+fixed_cbits = {}
+
+fixed_cbits[("I2C", (0, 21, 0))]  = ["BUS_ADDR74_0", "I2C_SLAVE_INIT_ADDR_0"]
+fixed_cbits[("I2C", (25, 21, 0))] = ["BUS_ADDR74_0", "BUS_ADDR74_1", "I2C_SLAVE_INIT_ADDR_1"]
+
+fixed_cbits[("SPI", (0, 0, 0))]  = []
+fixed_cbits[("SPI", (25, 0, 1))] = ["BUS_ADDR74_1"] # WARNING: this is documented as BUS_ADDR74_0, but this is wrong and will cause icecube to fail. May be the same across devices
+
+#up5k
+# fixed_cbits[("I2C", (0, 31, 0))]  = ["BUS_ADDR74_0", "I2C_SLAVE_INIT_ADDR_0"]
+# fixed_cbits[("I2C", (25, 31, 0))] = ["BUS_ADDR74_0", "BUS_ADDR74_1", "I2C_SLAVE_INIT_ADDR_1"]
+
+# fixed_cbits[("SPI", (0, 10, 0))]  = []
+# fixed_cbits[("SPI", (25, 10, 1))] = ["BUS_ADDR74_1"] # WARNING: this is documented as BUS_ADDR74_0, but this is wrong and will cause icecube to fail. May be the same across devices
+
+fuzz_cbits = {}
+fuzz_cbits["I2C"] = ["SDA_INPUT_DELAYED", "SDA_OUTPUT_DELAYED"]
+
+# Don't add slave address to the list, despite confusing primitive declaration,
+# it's only set in registers not the bitstream
+
+#for i in range(2, 10):
+    #fuzz_cbits["I2C"].append("I2C_SLAVE_INIT_ADDR_%d" % i)
+
+for i in range(8):
+    ip_signals["I2C"][0].append("SBADRI%d" % i)
+    ip_signals["SPI"][0].append("SBADRI%d" % i)
+    
+for i in range(8):
+    ip_signals["I2C"][0].append("SBDATI%d" % i)
+    ip_signals["SPI"][0].append("SBDATI%d" % i)
+    
+for i in range(8):
+    ip_signals["I2C"][1].append("SBDATO%d" % i)
+    ip_signals["SPI"][1].append("SBDATO%d" % i)
+    
+for i in range(4):
+    ip_signals["SPI"][1].append("MCSNO%d" % i)
+    ip_signals["SPI"][1].append("MCSNOE%d" % i)
+
+fuzz_net_options = {}
+fuzz_net_options["I2C"] = ["SBADRI", "SBDATI", "SBDATO"]
+fuzz_net_options["SPI"] = ["SBADRI", "SBDATI", "SBDATO", "MCSN"]
+    
+available_cbits = {}
+available_cbits["I2C"] = [("BUS_ADDR74", 4), ("I2C_SLAVE_INIT_ADDR", 10)]
+available_cbits["SPI"] = [("BUS_ADDR74", 4)]
+
+# Return a param value in "Lattice style"
+def get_param_value(param_size, param_name, set_cbits):
+    val = "\"0b"
+    for i in range(param_size):
+        if param_name + "_" + str((param_size - 1) - i) in set_cbits:
+            val += "1"
+        else:
+            val += "0"
+    val += "\""
+    return val
+
+# Build the output files for a given IP and config, returning
+# the pin2net map
+def make_ip(ip_type, ip_loc, fuzz_opt, set_cbits):
+    used_inputs = [ ]
+    used_outputs = [ ]
+    for insig in ip_signals[ip_type][0]:
+        ignore = False
+        for o in fuzz_net_options[ip_type]:
+            if o != fuzz_opt and insig.startswith(o):
+                ignore = True
+        if not ignore:
+            used_inputs.append(insig)
+    for outsig in ip_signals[ip_type][1]:
+        ignore = False
+        for o in fuzz_net_options[ip_type]:
+            if o != fuzz_opt and outsig.startswith(o):
+                ignore = True
+        if not ignore:
+            used_outputs.append(outsig)
+    all_sigs = used_inputs + used_outputs
+    all_cbits = set()
+    all_cbits.update(set_cbits)
+    if (ip_type, ip_loc) in fixed_cbits:
+        all_cbits.update(fixed_cbits[(ip_type, ip_loc)])
+    with open("./work_ip/ip.v", "w") as f:
+        print("module top(", file=f)
+        for s in used_inputs:
+            print("input %s," % s, file=f)
+        for s in used_outputs[:-1]:
+            print("output %s," % s, file=f)
+        print("output %s);" % used_outputs[-1], file=f)
+        print("SB_%s" % ip_type, file=f)
+        if ip_type in available_cbits:
+            print("\t#(", file=f)
+            for p in available_cbits[ip_type]:
+                name, width = p
+                comma = "," if p != available_cbits[ip_type][-1] else ""
+                print("\t\t.%s(%s)%s" % (name, get_param_value(width, name, all_cbits), comma), file=f)
+            print("\t)", file=f)
+        print("\tip_inst (",file=f)
+        for sig in all_sigs[:-1]:
+            print("\t\t.%s(%s)," % (sig, sig), file=f)
+        print("\t\t.%s(%s)" % (all_sigs[-1], all_sigs[-1]), file=f)
+        print("\t)", file=f)
+        if "SDA_INPUT_DELAYED" in all_cbits:
+            print("\t/* synthesis SDA_INPUT_DELAYED=1 */", file=f)
+        else:
+            print("\t/* synthesis SDA_INPUT_DELAYED=0 */", file=f)
+        if "SDA_OUTPUT_DELAYED" in all_cbits:
+            print("\t/* synthesis SDA_OUTPUT_DELAYED=1 */", file=f)
+        else:
+            print("\t/* synthesis SDA_OUTPUT_DELAYED=0 */", file=f)
+        print(";", file=f)
+        print("endmodule", file=f)
+    pin2net = {}
+    with open("./work_ip/ip.pcf","w") as f:
+        temp_pins = list(pins)
+        for sig in all_sigs:
+            if len(temp_pins) == 0:
+                sys.stderr.write("ERROR: no remaining pins to alloc")
+                sys.exit(1)
+            pin = temp_pins.pop()
+            pin2net[pin] = sig
+            print("set_io %s %s" % (sig, pin), file=f)
+        print("set_location ip_inst %d %d %d" % ip_loc, file=f)
+    return pin2net
+
+def check_for_pin_assignment(pin):
+    out = None
+    with open("./work_ip/ip.vlog", "r") as f:
+        for l in f:
+            if l.startswith("assign pin_{}".format(pin)):
+                rhs = l.split("=")
+                o_cen = rhs[1].split(" ")[1]
+                out = rhs[1].split(" ")[3]
+    
+    return out
+
+#Parse the output of an icebox vlog file to determine connectivity
+def parse_vlog(f, pin2net, net_map):
+    wires_to_check = dict()
+    
+    current_net = None
+    
+    for line in f:
+        if line == "\n":
+            current_net = None
+
+        m = re.match(r"wire ([a-zA-Z0-9_]+);", line)
+        if m:
+            net = m.group(1)
+            mp = re.match(r"pin_([a-zA-Z0-9]+)", net)
+            if mp:
+                pin = mp.group(1)
+                if pin in pin2net:
+                    current_net = pin2net[pin]
+                else:
+                    current_net = None
+
+                #search for assignment
+                data_input = check_for_pin_assignment(pin)
+                if data_input:
+                    wires_to_check[data_input] = pin
+
+            else:
+                current_net = None
+        elif current_net is not None:
+            m = re.match(r"// \((\d+), (\d+), '([a-zA-Z0-9_/]+)'\)", line)
+            if m:
+                x = int(m.group(1))
+                y = int(m.group(2)) 
+                net = m.group(3)
+                if not (net.startswith("sp") or net.startswith("glb") or net.startswith("neigh") or net.startswith("io") or net.startswith("local") or net.startswith("fabout")):
+                    net_map[current_net].add((x, y, net))
+
+    f.seek(0)
+    for line in f:
+        if line == "\n":
+            current_net = None
+
+        m = re.match(r"wire ([a-zA-Z0-9]+);", line)
+        if m:
+            net = m.group(1)
+            if net in wires_to_check:
+                pin = wires_to_check[net]
+                if pin in pin2net:
+                    current_net = pin2net[pin]
+                else:
+                    current_net = None
+            else:
+                current_net = None
+        elif current_net is not None:
+            m = re.match(r"// \((\d+), (\d+), '([a-zA-Z0-9_/]+)'\)", line)
+            if m:
+                x = int(m.group(1))
+                y = int(m.group(2)) 
+                net = m.group(3)
+                if not (net.startswith("sp") or net.startswith("glb") or net.startswith("neigh") or net.startswith("io") or net.startswith("local") or net.startswith("fabout")):
+                    net_map[current_net].add((x, y, net))
+
+def parse_exp(f):
+    current_x = 0
+    current_y = 0
+    bits = set()
+    for line in f:
+        splitline = line.split(' ')
+        if splitline[0].endswith("_tile"):
+            current_x = int(splitline[1])
+            current_y = int(splitline[2])
+        elif splitline[0] == "IpConfig":
+            bits.add((current_x, current_y, splitline[1].strip()))  
+    return bits
+            
+if not os.path.exists("./work_ip"):
+    os.mkdir("./work_ip")
+for ip in ip_types:
+    ip_data[ip] = {}
+    for loc in ip_locs[ip]:
+        x, y, z = loc
+        net_cbit_map = {}
+        init_cbits = []
+        for sig in ip_signals[ip][0]:
+            net_cbit_map[sig] = set()
+        for sig in ip_signals[ip][1]:
+            net_cbit_map[sig] = set()
+        first = True
+        for state in ["FUZZ_NETS", "FUZZ_CBITS"]:
+            fuzz_options = None
+            if state == "FUZZ_NETS":
+                fuzz_options = fuzz_net_options[ip]
+            else:
+                if ip in fuzz_cbits:
+                    fuzz_options = fuzz_cbits[ip]
+                else:
+                    fuzz_options = []
+            for n in fuzz_options:
+                # if n != "SBDATO":
+                #     continue
+                print("Fuzzing %s (%d, %d, %d) %s" % (ip, x, y, z, n))
+                fuzz_nets = fuzz_net_options[ip][0]
+                if state == "FUZZ_NETS":
+                    fuzz_nets = n
+                set_cbits = set()
+                if state == "FUZZ_CBITS":
+                    set_cbits.add(n)
+                pin2net = make_ip(ip, loc, fuzz_nets, set_cbits)
+                retval = os.system("bash ../../icecube.sh -" + device + " ./work_ip/ip.v > ./work_ip/icecube.log 2>&1")
+                if retval != 0:
+                    sys.stderr.write('ERROR: icecube returned non-zero error code\n')
+                    sys.exit(1)
+                retval = os.system("../../../icebox/icebox_explain.py ./work_ip/ip.asc > ./work_ip/ip.exp")
+                if retval != 0:
+                    sys.stderr.write('ERROR: icebox_explain returned non-zero error code\n')
+                    sys.exit(1)
+                retval = os.system("../../../icebox/icebox_vlog.py -l ./work_ip/ip.asc > ./work_ip/ip.vlog")
+                if retval != 0:
+                    sys.stderr.write('ERROR: icebox_vlog returned non-zero error code\n')
+                    sys.exit(1)
+                with open("./work_ip/ip.vlog", "r") as f:
+                    parse_vlog(f, pin2net, net_cbit_map)
+                bits = []
+                with open("./work_ip/ip.exp", "r") as f:
+                    bits = parse_exp(f)
+                if first:
+                    idx = 0
+                    for bit in bits:
+                        init_cbits.append(bit)
+                        if len(bits) == 1:
+                            net_cbit_map[ip + "_ENABLE"] = [bit]
+                        else:
+                            net_cbit_map[ip + "_ENABLE_" + str(idx)] = [bit]
+                        idx += 1
+                for bit in init_cbits:
+                    if bit not in bits:
+                        bx, by, bn = bit
+                        print('WARNING: while fuzzing %s (%d, %d, %d) bit (%d, %d, %s) has unknown function (not always set)' % 
+                              (ip, x, y, z, bx, by, bn))
+                new_bits = []
+                for bit in bits:
+                    if bit not in init_cbits:
+                        new_bits.append(bit)
+                if state == "FUZZ_NETS" and len(new_bits) != 0:
+                    for bit in new_bits:
+                        bx, by, bn = bit
+                        print('WARNING: while fuzzing %s (%d, %d, %d) bit (%d, %d, %s) has unknown function (not always set)' % 
+                              (ip, x, y, z, bx, by, bn))
+                elif state == "FUZZ_CBITS":
+                    if len(new_bits) == 0:
+                        print('WARNING: while fuzzing %s (%d, %d, %d) param %s causes no change' % 
+                              (ip, x, y, z, n))
+                    else:
+                        idx = 0
+                        for bit in new_bits:
+                            if len(new_bits) == 1:
+                                net_cbit_map[n] = [bit]
+                            else:
+                                net_cbit_map[n + "_" + str(idx)] = [bit]
+                            idx += 1
+                first = False
+            # if n == "SBDATO":
+            #     exit()
+        ip_data[ip][loc] = net_cbit_map         
+
+    with open(device + "_" + ip + "_data.txt", "w") as f:
+        for loc in ip_data[ip]:
+            x, y, z = loc
+            print("\t(\"%s\", (%d, %d, %d)): {" % (ip, x, y, z), file=f)
+            data = ip_data[ip][loc]
+            for net in sorted(data):
+                cnets = []
+                for cnet in data[net]:
+                    cnets.append("(%d, %d, \"%s\")" % cnet)
+                print("\t\t%s %s, " % (("\"" + net.replace("[","_").replace("]","") + "\":").ljust(24), " ".join(cnets)), file=f)
+            print("\t},", file=f)
diff --git a/icefuzz/tests/ip/u4k_I2C_data.txt b/icefuzz/tests/ip/u4k_I2C_data.txt
new file mode 100644
index 0000000..6338608
--- /dev/null
+++ b/icefuzz/tests/ip/u4k_I2C_data.txt
@@ -0,0 +1,84 @@
+	("I2C", (0, 21, 0)): {
+		"I2CIRQ":                (0, 20, "slf_op_7"), 
+		"I2CWKUP":               (0, 19, "slf_op_5"), 
+		"I2C_ENABLE_0":          (13, 21, "cbit2usealt_in_0"), 
+		"I2C_ENABLE_1":          (12, 21, "cbit2usealt_in_1"), 
+		"SBACKO":                (0, 20, "slf_op_6"), 
+		"SBADRI0":               (0, 20, "lutff_1/in_0"), 
+		"SBADRI1":               (0, 20, "lutff_2/in_0"), 
+		"SBADRI2":               (0, 20, "lutff_3/in_0"), 
+		"SBADRI3":               (0, 20, "lutff_4/in_0"), 
+		"SBADRI4":               (0, 20, "lutff_5/in_0"), 
+		"SBADRI5":               (0, 20, "lutff_6/in_0"), 
+		"SBADRI6":               (0, 20, "lutff_7/in_0"), 
+		"SBADRI7":               (0, 19, "lutff_2/in_0"), 
+		"SBCLKI":                (0, 20, "clk"), 
+		"SBDATI0":               (0, 19, "lutff_5/in_0"), 
+		"SBDATI1":               (0, 19, "lutff_6/in_0"), 
+		"SBDATI2":               (0, 19, "lutff_7/in_0"), 
+		"SBDATI3":               (0, 20, "lutff_0/in_3"), 
+		"SBDATI4":               (0, 20, "lutff_5/in_1"), 
+		"SBDATI5":               (0, 20, "lutff_6/in_1"), 
+		"SBDATI6":               (0, 20, "lutff_7/in_1"), 
+		"SBDATI7":               (0, 20, "lutff_0/in_0"), 
+		"SBDATO0":               (0, 19, "slf_op_6"), 
+		"SBDATO1":               (0, 19, "slf_op_7"), 
+		"SBDATO2":               (0, 20, "slf_op_0"), 
+		"SBDATO3":               (0, 20, "slf_op_1"), 
+		"SBDATO4":               (0, 20, "slf_op_2"), 
+		"SBDATO5":               (0, 20, "slf_op_3"), 
+		"SBDATO6":               (0, 20, "slf_op_4"), 
+		"SBDATO7":               (0, 20, "slf_op_5"), 
+		"SBRWI":                 (0, 19, "lutff_4/in_0"), 
+		"SBSTBI":                (0, 19, "lutff_3/in_0"), 
+		"SCLI":                  (0, 19, "lutff_2/in_1"), 
+		"SCLO":                  (0, 19, "slf_op_3"), 
+		"SCLOE":                 (0, 19, "slf_op_4"), 
+		"SDAI":                  (0, 19, "lutff_1/in_1"), 
+		"SDAO":                  (0, 19, "slf_op_1"), 
+		"SDAOE":                 (0, 19, "slf_op_2"), 
+		"SDA_INPUT_DELAYED":     (12, 21, "SDA_input_delay"), 
+		"SDA_OUTPUT_DELAYED":    (12, 21, "SDA_output_delay"), 
+	},
+	("I2C", (25, 21, 0)): {
+		"I2CIRQ":                (25, 20, "slf_op_7"), 
+		"I2CWKUP":               (25, 19, "slf_op_5"), 
+		"I2C_ENABLE_0":          (19, 21, "cbit2usealt_in_1"), 
+		"I2C_ENABLE_1":          (19, 21, "cbit2usealt_in_0"), 
+		"SBACKO":                (25, 20, "slf_op_6"), 
+		"SBADRI0":               (25, 20, "lutff_1/in_0"), 
+		"SBADRI1":               (25, 20, "lutff_2/in_0"), 
+		"SBADRI2":               (25, 20, "lutff_3/in_0"), 
+		"SBADRI3":               (25, 20, "lutff_4/in_0"), 
+		"SBADRI4":               (25, 20, "lutff_5/in_0"), 
+		"SBADRI5":               (25, 20, "lutff_6/in_0"), 
+		"SBADRI6":               (25, 20, "lutff_7/in_0"), 
+		"SBADRI7":               (25, 19, "lutff_2/in_0"), 
+		"SBCLKI":                (25, 20, "clk"), 
+		"SBDATI0":               (25, 19, "lutff_5/in_0"), 
+		"SBDATI1":               (25, 19, "lutff_6/in_0"), 
+		"SBDATI2":               (25, 19, "lutff_7/in_0"), 
+		"SBDATI3":               (25, 20, "lutff_0/in_3"), 
+		"SBDATI4":               (25, 20, "lutff_5/in_1"), 
+		"SBDATI5":               (25, 20, "lutff_6/in_1"), 
+		"SBDATI6":               (25, 20, "lutff_7/in_1"), 
+		"SBDATI7":               (25, 20, "lutff_0/in_0"), 
+		"SBDATO0":               (25, 19, "slf_op_6"), 
+		"SBDATO1":               (25, 19, "slf_op_7"), 
+		"SBDATO2":               (25, 20, "slf_op_0"), 
+		"SBDATO3":               (25, 20, "slf_op_1"), 
+		"SBDATO4":               (25, 20, "slf_op_2"), 
+		"SBDATO5":               (25, 20, "slf_op_3"), 
+		"SBDATO6":               (25, 20, "slf_op_4"), 
+		"SBDATO7":               (25, 20, "slf_op_5"), 
+		"SBRWI":                 (25, 19, "lutff_4/in_0"), 
+		"SBSTBI":                (25, 19, "lutff_3/in_0"), 
+		"SCLI":                  (25, 19, "lutff_2/in_1"), 
+		"SCLO":                  (25, 19, "slf_op_3"), 
+		"SCLOE":                 (25, 19, "slf_op_4"), 
+		"SDAI":                  (25, 19, "lutff_1/in_1"), 
+		"SDAO":                  (25, 19, "slf_op_1"), 
+		"SDAOE":                 (25, 19, "slf_op_2"), 
+		"SDA_INPUT_DELAYED":     (19, 21, "SDA_input_delay"), 
+		"SDA_OUTPUT_DELAYED":    (19, 21, "SDA_output_delay"), 
+	},
diff --git a/icefuzz/tests/ip/u4k_SPI_data.txt b/icefuzz/tests/ip/u4k_SPI_data.txt
new file mode 100644
index 0000000..b6463a7
--- /dev/null
+++ b/icefuzz/tests/ip/u4k_SPI_data.txt
@@ -0,0 +1,108 @@
+	("SPI", (0, 0, 0)): {
+		"MCSNO0":                (0, 3, "slf_op_1"), 
+		"MCSNO1":                (0, 3, "slf_op_3"), 
+		"MCSNO2":                (0, 3, "slf_op_6"), 
+		"MCSNO3":                (0, 4, "slf_op_0"), 
+		"MCSNOE0":               (0, 3, "slf_op_2"), 
+		"MCSNOE1":               (0, 3, "slf_op_4"), 
+		"MCSNOE2":               (0, 3, "slf_op_7"), 
+		"MCSNOE3":               (0, 4, "slf_op_1"), 
+		"MI":                    (0, 2, "lutff_0/in_1"), 
+		"MO":                    (0, 2, "slf_op_5"), 
+		"MOE":                   (0, 2, "slf_op_6"), 
+		"SBACKO":                (0, 2, "slf_op_0"), 
+		"SBADRI0":               (0, 1, "lutff_1/in_1"), 
+		"SBADRI1":               (0, 1, "lutff_2/in_1"), 
+		"SBADRI2":               (0, 2, "lutff_0/in_3"), 
+		"SBADRI3":               (0, 2, "lutff_1/in_3"), 
+		"SBADRI4":               (0, 2, "lutff_2/in_3"), 
+		"SBADRI5":               (0, 2, "lutff_3/in_3"), 
+		"SBADRI6":               (0, 2, "lutff_4/in_3"), 
+		"SBADRI7":               (0, 2, "lutff_5/in_3"), 
+		"SBCLKI":                (0, 1, "clk"), 
+		"SBDATI0":               (0, 1, "lutff_1/in_3"), 
+		"SBDATI1":               (0, 1, "lutff_2/in_3"), 
+		"SBDATI2":               (0, 1, "lutff_3/in_3"), 
+		"SBDATI3":               (0, 1, "lutff_4/in_3"), 
+		"SBDATI4":               (0, 1, "lutff_5/in_3"), 
+		"SBDATI5":               (0, 1, "lutff_6/in_3"), 
+		"SBDATI6":               (0, 1, "lutff_7/in_3"), 
+		"SBDATI7":               (0, 1, "lutff_0/in_1"), 
+		"SBDATO0":               (0, 1, "slf_op_0"), 
+		"SBDATO1":               (0, 1, "slf_op_1"), 
+		"SBDATO2":               (0, 1, "slf_op_2"), 
+		"SBDATO3":               (0, 1, "slf_op_3"), 
+		"SBDATO4":               (0, 1, "slf_op_4"), 
+		"SBDATO5":               (0, 1, "slf_op_5"), 
+		"SBDATO6":               (0, 1, "slf_op_6"), 
+		"SBDATO7":               (0, 1, "slf_op_7"), 
+		"SBRWI":                 (0, 1, "lutff_0/in_3"), 
+		"SBSTBI":                (0, 2, "lutff_6/in_3"), 
+		"SCKI":                  (0, 2, "lutff_1/in_1"), 
+		"SCKO":                  (0, 2, "slf_op_7"), 
+		"SCKOE":                 (0, 3, "slf_op_0"), 
+		"SCSNI":                 (0, 2, "lutff_2/in_1"), 
+		"SI":                    (0, 2, "lutff_7/in_3"), 
+		"SO":                    (0, 2, "slf_op_3"), 
+		"SOE":                   (0, 2, "slf_op_4"), 
+		"SPIIRQ":                (0, 2, "slf_op_1"), 
+		"SPIWKUP":               (0, 2, "slf_op_2"), 
+		"SPI_ENABLE_0":          (7, 0, "cbit2usealt_in_0"), 
+		"SPI_ENABLE_1":          (6, 0, "cbit2usealt_in_0"), 
+		"SPI_ENABLE_2":          (7, 0, "cbit2usealt_in_1"), 
+		"SPI_ENABLE_3":          (6, 0, "cbit2usealt_in_1"), 
+	},
+	("SPI", (25, 0, 1)): {
+		"MCSNO0":                (25, 3, "slf_op_1"), 
+		"MCSNO1":                (25, 3, "slf_op_3"), 
+		"MCSNO2":                (25, 3, "slf_op_6"), 
+		"MCSNO3":                (25, 4, "slf_op_0"), 
+		"MCSNOE0":               (25, 3, "slf_op_2"), 
+		"MCSNOE1":               (25, 3, "slf_op_4"), 
+		"MCSNOE2":               (25, 3, "slf_op_7"), 
+		"MCSNOE3":               (25, 4, "slf_op_1"), 
+		"MI":                    (25, 2, "lutff_0/in_1"), 
+		"MO":                    (25, 2, "slf_op_5"), 
+		"MOE":                   (25, 2, "slf_op_6"), 
+		"SBACKO":                (25, 2, "slf_op_0"), 
+		"SBADRI0":               (25, 1, "lutff_1/in_1"), 
+		"SBADRI1":               (25, 1, "lutff_2/in_1"), 
+		"SBADRI2":               (25, 2, "lutff_0/in_3"), 
+		"SBADRI3":               (25, 2, "lutff_1/in_3"), 
+		"SBADRI4":               (25, 2, "lutff_2/in_3"), 
+		"SBADRI5":               (25, 2, "lutff_3/in_3"), 
+		"SBADRI6":               (25, 2, "lutff_4/in_3"), 
+		"SBADRI7":               (25, 2, "lutff_5/in_3"), 
+		"SBCLKI":                (25, 1, "clk"), 
+		"SBDATI0":               (25, 1, "lutff_1/in_3"), 
+		"SBDATI1":               (25, 1, "lutff_2/in_3"), 
+		"SBDATI2":               (25, 1, "lutff_3/in_3"), 
+		"SBDATI3":               (25, 1, "lutff_4/in_3"), 
+		"SBDATI4":               (25, 1, "lutff_5/in_3"), 
+		"SBDATI5":               (25, 1, "lutff_6/in_3"), 
+		"SBDATI6":               (25, 1, "lutff_7/in_3"), 
+		"SBDATI7":               (25, 1, "lutff_0/in_1"), 
+		"SBDATO0":               (25, 1, "slf_op_0"), 
+		"SBDATO1":               (25, 1, "slf_op_1"), 
+		"SBDATO2":               (25, 1, "slf_op_2"), 
+		"SBDATO3":               (25, 1, "slf_op_3"), 
+		"SBDATO4":               (25, 1, "slf_op_4"), 
+		"SBDATO5":               (25, 1, "slf_op_5"), 
+		"SBDATO6":               (25, 1, "slf_op_6"), 
+		"SBDATO7":               (25, 1, "slf_op_7"), 
+		"SBRWI":                 (25, 1, "lutff_0/in_3"), 
+		"SBSTBI":                (25, 2, "lutff_6/in_3"), 
+		"SCKI":                  (25, 2, "lutff_1/in_1"), 
+		"SCKO":                  (25, 2, "slf_op_7"), 
+		"SCKOE":                 (25, 3, "slf_op_0"), 
+		"SCSNI":                 (25, 2, "lutff_2/in_1"), 
+		"SI":                    (25, 2, "lutff_7/in_3"), 
+		"SO":                    (25, 2, "slf_op_3"), 
+		"SOE":                   (25, 2, "slf_op_4"), 
+		"SPIIRQ":                (25, 2, "slf_op_1"), 
+		"SPIWKUP":               (25, 2, "slf_op_2"), 
+		"SPI_ENABLE_0":          (24, 0, "cbit2usealt_in_0"), 
+		"SPI_ENABLE_1":          (24, 0, "cbit2usealt_in_1"), 
+		"SPI_ENABLE_2":          (23, 0, "cbit2usealt_in_0"), 
+		"SPI_ENABLE_3":          (23, 0, "cbit2usealt_in_1"), 
+	},