complete refactor to InternalBus()

src/manta/io_core.py

@@ -87,16 +87,9 @@ class IOCore(Elaboratable):
                         )
 
     def define_signals(self):
-        # Bus Ports
+        # Bus Input/Output
-        self.addr_i = Signal(16)
+        self.bus_i = Signal(InternalBus())
-        self.data_i = Signal(16)
+        self.bus_o = Signal(InternalBus())
-        self.rw_i = Signal()
-        self.valid_i = Signal()
-
-        self.addr_o = Signal(16)
-        self.data_o = Signal(16)
-        self.rw_o = Signal()
-        self.valid_o = Signal()
 
         # Input Probes (and buffers)
         if "inputs" in self.config:
@@ -187,10 +180,7 @@ class IOCore(Elaboratable):
         m = Module()
 
         # Shuffle bus transactions along
-        m.d.sync += self.addr_o.eq(self.addr_i)
+        m.d.sync += self.bus_o.eq(self.bus_i)
-        m.d.sync += self.data_o.eq(self.data_i)
-        m.d.sync += self.rw_o.eq(self.rw_i)
-        m.d.sync += self.valid_o.eq(self.valid_i)
 
         # Update buffers from probes
         with m.If(self.strobe):
@@ -209,17 +199,17 @@ class IOCore(Elaboratable):
                     m.d.sync += output_probe.eq(output_probe_buf)
 
         # Handle register reads and writes
-        with m.If((self.addr_i >= self.base_addr)):
+        with m.If((self.bus_i.addr >= self.base_addr)):
-            with m.If((self.addr_o <= self.max_addr)):
+            with m.If((self.bus_o.addr <= self.max_addr)):
                 for entry in self.mmap.values():
                     for addr, signal in zip(entry["addrs"], entry["signals"]):
-                        with m.If(self.rw_i):
+                        with m.If(self.bus_i.rw):
-                            with m.If(self.addr_i == addr):
+                            with m.If(self.bus_i.addr == addr):
-                                m.d.sync += signal.eq(self.data_i)
+                                m.d.sync += signal.eq(self.bus_i.data)
 
                         with m.Else():
-                            with m.If(self.addr_i == addr):
+                            with m.If(self.bus_i.addr == addr):
-                                m.d.sync += self.data_o.eq(signal)
+                                m.d.sync += self.bus_o.data.eq(signal)
 
         return m
 

src/manta/logic_analyzer/__init__.py

@@ -36,17 +36,9 @@ class LogicAnalyzerCore(Elaboratable):
         self.config = config
         self.check_config(config)
 
-        # Bus Input
+        # Bus Input/Output
-        self.addr_i = Signal(16)
+        self.bus_i = Signal(InternalBus())
-        self.data_i = Signal(16)
+        self.bus_o = Signal(InternalBus())
-        self.rw_i = Signal(1)
-        self.valid_i = Signal(1)
-
-        # Bus Output
-        self.addr_o = Signal(16)
-        self.data_o = Signal(16)
-        self.rw_o = Signal(1)
-        self.valid_o = Signal(1)
 
         self.probes = [
             Signal(width, name=name) for name, width in self.config["probes"].items()
@@ -177,26 +169,15 @@ class LogicAnalyzerCore(Elaboratable):
         # Wire bus connections between internal modules
         m.d.comb += [
             # Bus Connections
-            fsm.addr_i.eq(self.addr_i),
+            fsm.bus_i.eq(self.bus_i),
-            fsm.data_i.eq(self.data_i),
+            trig_blk.bus_i.eq(self.fsm.bus_o),
-            fsm.rw_i.eq(self.rw_i),
+            sample_mem.bus_i.eq(trig_blk.bus_o),
-            fsm.valid_i.eq(self.valid_i),
+            self.bus_o.eq(sample_mem.bus_o),
-            trig_blk.addr_i.eq(fsm.addr_o),
+
-            trig_blk.data_i.eq(fsm.data_o),
-            trig_blk.rw_i.eq(fsm.rw_o),
-            trig_blk.valid_i.eq(fsm.valid_o),
-            sample_mem.addr_i.eq(trig_blk.addr_o),
-            sample_mem.data_i.eq(trig_blk.data_o),
-            sample_mem.rw_i.eq(trig_blk.rw_o),
-            sample_mem.valid_i.eq(trig_blk.valid_o),
-            self.addr_o.eq(sample_mem.addr_o),
-            self.data_o.eq(sample_mem.data_o),
-            self.rw_o.eq(sample_mem.rw_o),
-            self.valid_o.eq(sample_mem.valid_o),
             # Non-bus Connections
             fsm.trigger.eq(trig_blk.trig),
             sample_mem.user_addr.eq(fsm.r.write_pointer),
-            sample_mem.user_we.eq(fsm.write_enable),
+            sample_mem.user_we.eq(fsm.write_enable)
         ]
 
         return m

src/manta/logic_analyzer/fsm.py

@@ -37,17 +37,9 @@ class LogicAnalyzerFSM(Elaboratable):
 
         self.r = IOCore(register_config, base_addr, interface)
 
-        # Bus Input
+        # Bus Input/Output
-        self.addr_i = self.r.addr_i
+        self.bus_i = self.r.bus_i
-        self.data_i = self.r.data_i
+        self.bus_o = self.r.bus_o
-        self.rw_i = self.r.rw_i
-        self.valid_i = self.r.valid_i
-
-        # Bus Output
-        self.addr_o = self.r.addr_o
-        self.data_o = self.r.data_o
-        self.rw_o = self.r.rw_o
-        self.valid_o = self.r.valid_o
 
     def get_max_addr(self):
         return self.r.get_max_addr()

src/manta/logic_analyzer/trigger_block.py

@@ -18,17 +18,9 @@ class LogicAnalyzerTriggerBlock(Elaboratable):
 
         self.r = IOCore({"outputs": outputs}, base_addr, interface)
 
-        # Bus Input
+        # Bus Input/Output
-        self.addr_i = self.r.addr_i
+        self.bus_i = self.r.bus_i
-        self.data_i = self.r.data_i
+        self.bus_o = self.r.bus_o
-        self.rw_i = self.r.rw_i
-        self.valid_i = self.r.valid_i
-
-        # Bus Output
-        self.addr_o = self.r.addr_o
-        self.data_o = self.r.data_o
-        self.rw_o = self.r.rw_o
-        self.valid_o = self.r.valid_o
 
         # Global trigger. High if any probe is triggered.
         self.trig = Signal(1)

src/manta/manta.py

@@ -136,28 +136,16 @@ class Manta(Elaboratable):
         core_instances = list(self.cores.values())
         first_core = core_instances[0]
         last_core = core_instances[-1]
-        m.d.comb += [
+
-            first_core.addr_i.eq(self.interface.addr_o),
+        m.d.comb += first_core.bus_i.eq(self.interface.bus_o)
-            first_core.data_i.eq(self.interface.data_o),
+        m.d.comb += self.interface.bus_i.eq(last_core.bus_o)
-            first_core.rw_i.eq(self.interface.rw_o),
-            first_core.valid_i.eq(self.interface.valid_o),
-            self.interface.addr_i.eq(last_core.addr_o),
-            self.interface.data_i.eq(last_core.data_o),
-            self.interface.rw_i.eq(last_core.rw_o),
-            self.interface.valid_i.eq(last_core.valid_o),
-        ]
 
         # Connect output of ith core to input of (i+1)th core
         for i in range(len(core_instances) - 1):
             ith_core = core_instances[i]
             i_plus_oneth_core = core_instances[i + 1]
 
-            m.d.comb += [
+            m.d.comb += i_plus_oneth_core.bus_i.eq(ith_core.bus_o)
-                i_plus_oneth_core.addr_i.eq(ith_core.addr_o),
-                i_plus_oneth_core.data_i.eq(ith_core.data_o),
-                i_plus_oneth_core.rw_i.eq(ith_core.rw_o),
-                i_plus_oneth_core.valid_i.eq(ith_core.valid_o),
-            ]
 
         return m
 

src/manta/memory_core.py

@@ -47,23 +47,10 @@ class ReadOnlyMemoryCore(Elaboratable):
             raise ValueError("Width of memory core must be positive. ")
 
     def define_signals(self):
-        # Bus Input
+        # Bus Input/Pipelining/Output
-        self.addr_i = Signal(16)
+        self.bus_i = Signal(InternalBus())
-        self.data_i = Signal(16)
+        self.bus_pipe = [Signal(InternalBus()) for _ in range(3)]
-        self.rw_i = Signal(1)
+        self.bus_o = Signal(InternalBus())
-        self.valid_i = Signal(1)
-
-        # Bus Pipelining
-        self.addr_pipe = [Signal(16) for _ in range(3)]
-        self.data_pipe = [Signal(16) for _ in range(3)]
-        self.rw_pipe = [Signal(1) for _ in range(3)]
-        self.valid_pipe = [Signal(1) for _ in range(3)]
-
-        # Bus Output
-        self.addr_o = Signal(16, reset=0)
-        self.data_o = Signal(16, reset=0)
-        self.rw_o = Signal(1, reset=0)
-        self.valid_o = Signal(1, reset=0)
 
         # User Port
         self.user_addr = Signal(range(self.depth))
@@ -71,22 +58,12 @@ class ReadOnlyMemoryCore(Elaboratable):
         self.user_we = Signal(1)
 
     def pipeline_bus(self, m):
-        # Pipelining
+        m.d.sync += self.bus_pipe[0].eq(self.bus_i)
-        m.d.sync += self.addr_pipe[0].eq(self.addr_i)
-        m.d.sync += self.data_pipe[0].eq(self.data_i)
-        m.d.sync += self.rw_pipe[0].eq(self.rw_i)
-        m.d.sync += self.valid_pipe[0].eq(self.valid_i)
 
         for i in range(1, 3):
-            m.d.sync += self.addr_pipe[i].eq(self.addr_pipe[i - 1])
+            m.d.sync += self.bus_pipe[i].eq(self.bus_pipe[i-1])
-            m.d.sync += self.data_pipe[i].eq(self.data_pipe[i - 1])
-            m.d.sync += self.rw_pipe[i].eq(self.rw_pipe[i - 1])
-            m.d.sync += self.valid_pipe[i].eq(self.valid_pipe[i - 1])
 
-        m.d.sync += self.addr_o.eq(self.addr_pipe[2])
+        m.d.sync += self.bus_o.eq(self.bus_pipe[2])
-        m.d.sync += self.data_o.eq(self.data_pipe[2])
-        m.d.sync += self.rw_o.eq(self.rw_pipe[2])
-        m.d.sync += self.valid_o.eq(self.valid_pipe[2])
 
     def define_mems(self):
         # ok there's three cases:
@@ -122,21 +99,21 @@ class ReadOnlyMemoryCore(Elaboratable):
 
             # Throw BRAM operations into the front of the pipeline
             with m.If(
-                (self.valid_i)
+                (self.bus_i.valid)
-                & (~self.rw_i)
+                & (~self.bus_i.rw)
-                & (self.addr_i >= start_addr)
+                & (self.bus_i.addr >= start_addr)
-                & (self.addr_i <= stop_addr)
+                & (self.bus_i.addr <= stop_addr)
             ):
-                m.d.sync += read_port.addr.eq(self.addr_i - start_addr)
+                m.d.sync += read_port.addr.eq(self.bus_i.addr - start_addr)
 
             # Pull BRAM reads from the back of the pipeline
             with m.If(
-                (self.valid_pipe[2])
+                (self.bus_pipe[2].valid)
-                & (~self.rw_pipe[2])
+                & (~self.bus_pipe[2].rw)
-                & (self.addr_pipe[2] >= start_addr)
+                & (self.bus_pipe[2].addr >= start_addr)
-                & (self.addr_pipe[2] <= stop_addr)
+                & (self.bus_pipe[2].addr <= stop_addr)
             ):
-                m.d.sync += self.data_o.eq(read_port.data)
+                m.d.sync += self.bus_o.data.eq(read_port.data)
 
     def handle_write_ports(self, m):
         # These are given to the user

src/manta/uart/__init__.py

@@ -225,15 +225,8 @@ class UARTInterface(Elaboratable):
         self.rx = Signal()
         self.tx = Signal()
 
-        self.addr_o = Signal(16)
+        self.bus_o = Signal(InternalBus())
-        self.data_o = Signal(16)
+        self.bus_i = Signal(InternalBus())
-        self.rw_o = Signal()
-        self.valid_o = Signal()
-
-        self.addr_i = Signal(16)
-        self.data_i = Signal(16)
-        self.rw_i = Signal()
-        self.valid_i = Signal()
 
     def elaborate(self, platform):
         # fancy submoduling and such goes in here
@@ -249,14 +242,14 @@ class UARTInterface(Elaboratable):
             uart_rx.rx.eq(self.rx),
             bridge_rx.data_i.eq(uart_rx.data_o),
             bridge_rx.valid_i.eq(uart_rx.valid_o),
-            self.data_o.eq(bridge_rx.data_o),
+            self.bus_o.data.eq(bridge_rx.data_o),
-            self.addr_o.eq(bridge_rx.addr_o),
+            self.bus_o.addr.eq(bridge_rx.addr_o),
-            self.rw_o.eq(bridge_rx.rw_o),
+            self.bus_o.rw.eq(bridge_rx.rw_o),
-            self.valid_o.eq(bridge_rx.valid_o),
+            self.bus_o.valid.eq(bridge_rx.valid_o),
             # Internal Bus -> UART TX
-            bridge_tx.data_i.eq(self.data_i),
+            bridge_tx.data_i.eq(self.bus_i.data),
-            bridge_tx.rw_i.eq(self.rw_i),
+            bridge_tx.rw_i.eq(self.bus_i.rw),
-            bridge_tx.valid_i.eq(self.valid_i),
+            bridge_tx.valid_i.eq(self.bus_i.valid),
             uart_tx.data_i.eq(bridge_tx.data_o),
             uart_tx.start_i.eq(bridge_tx.start_o),
             bridge_tx.done_i.eq(uart_tx.done_o),

src/manta/utils.py

@@ -83,20 +83,20 @@ def verify_register(module, addr, expected_data):
     """
 
     # place read transaction on the bus
-    yield module.addr_i.eq(addr)
+    yield module.bus_i.addr.eq(addr)
-    yield module.data_i.eq(0)
+    yield module.bus_i.data.eq(0)
-    yield module.rw_i.eq(0)
+    yield module.bus_i.rw.eq(0)
-    yield module.valid_i.eq(1)
+    yield module.bus_i.valid.eq(1)
     yield
-    yield module.addr_i.eq(0)
+    yield module.bus_i.addr.eq(0)
-    yield module.valid_i.eq(0)
+    yield module.bus_i.valid.eq(0)
 
     # wait for output to be valid
-    while not (yield module.valid_o):
+    while not (yield module.bus_o.valid):
         yield
 
     # compare returned value with expected
-    data = yield (module.data_o)
+    data = yield (module.bus_o.data)
     if data != expected_data:
         raise ValueError(f"Read from {addr} yielded {data} instead of {expected_data}")
 
@@ -107,12 +107,12 @@ def write_register(module, addr, data):
     at `addr`.
     """
 
-    yield module.addr_i.eq(addr)
+    yield module.bus_i.addr.eq(addr)
-    yield module.data_i.eq(data)
+    yield module.bus_i.data.eq(data)
-    yield module.rw_i.eq(1)
+    yield module.bus_i.rw.eq(1)
-    yield module.valid_i.eq(1)
+    yield module.bus_i.valid.eq(1)
     yield
-    yield module.valid_i.eq(0)
+    yield module.bus_i.valid.eq(0)
     yield
 
 

test/test_logic_analyzer_sim.py

@@ -16,19 +16,19 @@ la = LogicAnalyzerCore(config, base_addr=0, interface=None)
 
 def print_data_at_addr(addr):
     # place read transaction on the bus
-    yield la.addr_i.eq(addr)
+    yield la.bus_i.addr.eq(addr)
-    yield la.data_i.eq(0)
+    yield la.bus_i.data.eq(0)
-    yield la.rw_i.eq(0)
+    yield la.bus_i.rw.eq(0)
-    yield la.valid_i.eq(1)
+    yield la.bus_i.valid.eq(1)
     yield
-    yield la.addr_i.eq(0)
+    yield la.bus_i.addr.eq(0)
-    yield la.valid_i.eq(0)
+    yield la.bus_i.valid.eq(0)
 
     # wait for output to be valid
-    while not (yield la.valid_o):
+    while not (yield la.bus_o.valid):
         yield
 
-    print(f"addr: {hex(addr)} data: {hex((yield la.data_o))}")
+    print(f"addr: {hex(addr)} data: {hex((yield la.bus_o.data))}")
 
 
 def set_fsm_register(name, data):