Disallow Tuple[str] signal variant in an IP core description

tests/data/data_parse/axi_axil_adapter.yaml

@@ -10,8 +10,8 @@ parameters:
   CONVERT_NARROW_BURST: 0
 signals:
   in:
-  - - clk
-  - - rst
+  - clk
+  - rst
 interfaces:
   s_axi:
     signals:
@@ -28,14 +28,12 @@ interfaces:
         - s_axi_awburst
         - 1
         - 0
-        ARVALID:
-        - s_axi_arvalid
+        ARVALID: s_axi_arvalid
         AWCACHE:
         - s_axi_awcache
         - 3
         - 0
-        AWVALID:
-        - s_axi_awvalid
+        AWVALID: s_axi_awvalid
         ARPROT:
         - s_axi_arprot
         - 2
@@ -44,12 +42,9 @@ interfaces:
         - s_axi_awprot
         - 2
         - 0
-        BREADY:
-        - s_axi_bready
-        ARLOCK:
-        - s_axi_arlock
-        RREADY:
-        - s_axi_rready
+        BREADY: s_axi_bready
+        ARLOCK: s_axi_arlock
+        RREADY: s_axi_rready
         ARSIZE:
         - s_axi_arsize
         - 2
@@ -66,10 +61,8 @@ interfaces:
         - s_axi_awaddr
         - (ADDR_WIDTH-1)
         - 0
-        WVALID:
-        - s_axi_wvalid
-        AWLOCK:
-        - s_axi_awlock
+        WVALID: s_axi_wvalid
+        AWLOCK: s_axi_awlock
         AWLEN:
         - s_axi_awlen
         - 7
@@ -78,8 +71,7 @@ interfaces:
         - s_axi_wdata
         - (AXI_DATA_WIDTH-1)
         - 0
-        WLAST:
-        - s_axi_wlast
+        WLAST: s_axi_wlast
         WSTRB:
         - s_axi_wstrb
         - (AXI_STRB_WIDTH-1)
@@ -97,18 +89,12 @@ interfaces:
         - (AXI_ID_WIDTH-1)
         - 0
       out:
-        ARREADY:
-        - s_axi_arready
-        AWREADY:
-        - s_axi_awready
-        WREADY:
-        - s_axi_wready
-        RVALID:
-        - s_axi_rvalid
-        BVALID:
-        - s_axi_bvalid
-        RLAST:
-        - s_axi_rlast
+        ARREADY: s_axi_arready
+        AWREADY: s_axi_awready
+        WREADY: s_axi_wready
+        RVALID: s_axi_rvalid
+        BVALID: s_axi_bvalid
+        RLAST: s_axi_rlast
         RDATA:
         - s_axi_rdata
         - (AXI_DATA_WIDTH-1)
@@ -134,16 +120,11 @@ interfaces:
   m_axil:
     signals:
       in:
-        ARREADY:
-        - m_axil_arready
-        AWREADY:
-        - m_axil_awready
-        WREADY:
-        - m_axil_wready
-        RVALID:
-        - m_axil_rvalid
-        BVALID:
-        - m_axil_bvalid
+        ARREADY: m_axil_arready
+        AWREADY: m_axil_awready
+        WREADY: m_axil_wready
+        RVALID: m_axil_rvalid
+        BVALID: m_axil_bvalid
         RDATA:
         - m_axil_rdata
         - (AXIL_DATA_WIDTH-1)
@@ -157,18 +138,14 @@ interfaces:
         - 1
         - 0
       out:
-        ARVALID:
-        - m_axil_arvalid
-        AWVALID:
-        - m_axil_awvalid
+        ARVALID: m_axil_arvalid
+        AWVALID: m_axil_awvalid
         AWPROT:
         - m_axil_awprot
         - 2
         - 0
-        BREADY:
-        - m_axil_bready
-        WVALID:
-        - m_axil_wvalid
+        BREADY: m_axil_bready
+        WVALID: m_axil_wvalid
         ARADDR:
         - m_axil_araddr
         - (ADDR_WIDTH-1)
@@ -177,8 +154,7 @@ interfaces:
         - m_axil_awaddr
         - (ADDR_WIDTH-1)
         - 0
-        RREADY:
-        - m_axil_rready
+        RREADY: m_axil_rready
         ARPROT:
         - m_axil_arprot
         - 2

tests/data/data_parse/ip_core_invalid.yaml

@@ -28,6 +28,8 @@ interfaces:
         signals:
             out:
                 ABC: []
+                non:
+                - nested
             foobar: {}
             barfoo:
 

tests/data/data_parse/ip_core_valid.yaml

@@ -27,7 +27,7 @@ interfaces:
 signals:
   in:
   - clk
-  - [rst]
+  - rst
   - [leds, 10, 0]
   - - btns
     - 32

tests/tests_parse/test_ip_desc.py

@@ -45,11 +45,11 @@ def invalid_interface_compliance_core(self):
         type: AXI4Stream
         signals:
             out:
-                TDATA: [p1]
-                TVALID: [p2]
-                TBUBU: [p3]
+                TDATA: p1
+                TVALID: p2
+                TBUBU: p3
             in:
-                TREADY: [p4]"""
+                TREADY: p4"""
         )
 
     @pytest.fixture
@@ -63,11 +63,11 @@ def optional_missing_interface_compliance_core(self):
         type: AXI4Stream
         signals:
             out:
-                TDATA: [p1]
-                TVALID: [p2]
-                TLAST: [p3]
+                TDATA: p1
+                TVALID: p2
+                TLAST: p3
             in:
-                TREADY: [p4]"""
+                TREADY: p4"""
         )
 
     @pytest.fixture
@@ -159,21 +159,18 @@ def test_invalid_syntax(self, completely_invalid_core):
                 "in": {
                     1: [
                         {"_schema": ["Not a valid string."]},
-                        {"_schema": ["Length must be 1."]},
                         {"_schema": ["Length must be 3."]},
                         {"_schema": ["Length must be 5."]},
                     ],
                     2: [
                         {"_schema": ["Not a valid string."]},
-                        {"_schema": ["Length must be 1."]},
                         {"_schema": ["Length must be 3."]},
                         {"_schema": ["Length must be 5."]},
                     ],
                     3: [
                         {"_schema": ["Not a valid string."]},
                         {"_schema": ["Not a valid tuple."]},
                         {"_schema": ["Not a valid tuple."]},
-                        {"_schema": ["Not a valid tuple."]},
                     ],
                 },
                 "inout": ["Field may not be null."],
@@ -221,11 +218,17 @@ def test_invalid_syntax(self, completely_invalid_core):
                                 "ABC": {
                                     "value": [
                                         {"_schema": ["Not a valid string."]},
-                                        {"_schema": ["Length must be 1."]},
                                         {"_schema": ["Length must be 3."]},
                                         {"_schema": ["Length must be 5."]},
                                     ]
-                                }
+                                },
+                                "non": {
+                                    "value": [
+                                        {"_schema": ["Not a valid string."]},
+                                        {"_schema": ["Length must be 3."]},
+                                        {"_schema": ["Length must be 5."]},
+                                    ]
+                                },
                             },
                             "barfoo": ["Unknown field."],
                             "foobar": ["Unknown field."],
@@ -265,7 +268,7 @@ def test_valid_syntax(self, completely_valid_core, force_compliance):
                     "clk",
                     ("btns", 32, 0, 15, 10),
                     ("leds", 10, 0),
-                    ("rst",),
+                    "rst",
                     ("useless", 22, 10),
                 },
                 output=set(),

topwrap/ip_desc.py

@@ -30,7 +30,7 @@
 
 _T = Union[str, int]
 
-Signal = Union[str, Tuple[str], Tuple[str, _T, _T], Tuple[str, _T, _T, _T, _T]]
+Signal = Union[str, Tuple[str, _T, _T], Tuple[str, _T, _T, _T, _T]]
 
 
 @marshmallow_dataclass.dataclass(frozen=True)
@@ -50,7 +50,7 @@ def bounds(self) -> Tuple[_T, _T, _T, _T]:
     def raw(self) -> Signal:
         out = self.bounds
         if out == (0, 0, 0, 0):
-            out = (self.name,)
+            out = self.name
         elif out[:2] == out[2:]:
             out = (self.name, *out[:2])
         else: