Added Python description to the hello posix example

Author: christophe0606

Examples/hello_posix/hello_graph/json/scheduler_hello_ident.json

@@ -0,0 +1,6 @@
+{
+  "process": 0,
+  "sink": 1,
+  "src": 2,
+  "evtSink": 3
+}

Examples/hello_posix/hello_graph/json/scheduler_hello_selectors_inits.json

@@ -0,0 +1,22 @@
+{
+  "DebugProcess<float,10,float,1>": {
+    "isTemplate": true,
+    "selectors": []
+  },
+  "DebugSink<float,1>": {
+    "isTemplate": true,
+    "selectors": [
+      "SEL_MESSAGE_ID"
+    ]
+  },
+  "DebugSource<float,10>": {
+    "isTemplate": true,
+    "selectors": []
+  },
+  "DebugEvtSink": {
+    "isTemplate": false,
+    "selectors": [
+      "SEL_MESSAGE_ID"
+    ]
+  }
+}

Examples/hello_posix/python/create.py

@@ -0,0 +1,65 @@
+from cmsis_stream.cg.scheduler import *
+from pathlib import Path
+import subprocess
+from nodes import *
+
+cwd = Path.cwd()
+target = (cwd / "../hello_graph").resolve()
+
+if not target.exists():
+    print(f"The script must be launched from the python folder but you launched it from {cwd}.")
+
+the_graph = Graph()
+
+src = DebugSource("src", CType(F32), 10)
+process = DebugProcess("process", CType(F32), 10)
+sink = DebugSink("sink", CType(F32))
+evtSink = DebugEvtSink("evtSink")
+
+the_graph.connect(src.o, process.i)
+the_graph.connect(process.o, sink.i)
+the_graph.connect(sink["oev0"], evtSink["iev0"])
+
+conf = Configuration()
+conf.CMSISDSP = False
+conf.asynchronous = False
+
+conf.horizontal = True
+conf.nodeIdentification = True
+conf.schedName = "scheduler_hello"
+conf.schedulerCFileName = "scheduler_hello"
+conf.memoryOptimization = True
+
+conf.appConfigCName = "app_config.hpp"
+conf.cOptionalInitArgs = ["helloParams_t *params"]
+conf.appNodesCName = "AppNodes_hello.hpp"
+conf.prefix = "stream_hello_"
+
+scheduling = the_graph.computeSchedule(config=conf)
+
+print("Schedule length = %d" % scheduling.scheduleLength)
+print("Memory usage %d bytes" % scheduling.memory)
+
+scheduling.ccode("../hello_graph", conf)
+scheduling.genJsonIdentification("../hello_graph/json", conf)
+scheduling.genJsonSelectorsInit("../hello_graph/json", conf)
+
+class MyStyle(Style):
+    def edge_color(self, edge):
+        nb = self.fifoLength(edge)
+        if nb is None:
+            nb = 0
+        d = self.edgeDstNode(edge)
+
+        if d.nodeName == "display":
+            return "magenta"
+        if nb > 512:
+            return "orange"
+        return super().edge_color(edge)
+
+myStyle = MyStyle()
+
+with open("../hello_graph/hello.dot", "w") as f:
+    scheduling.graphviz(f, style=myStyle)
+
+subprocess.run(["dot", "-Tpng", "../hello_graph/hello.dot", "-o", "../hello_graph/hello.png"])

Examples/hello_posix/python/nodes/DebugEvtSink.py

@@ -0,0 +1,10 @@
+from cmsis_stream.cg.scheduler import *
+
+class DebugEvtSink(BaseNode):
+    def __init__(self, name):
+        BaseNode.__init__(self, name, selectors=["message"])
+        self.addEventInput()
+
+    @property
+    def typeName(self):
+        return "DebugEvtSink"

Examples/hello_posix/python/nodes/DebugProcess.py

@@ -0,0 +1,11 @@
+from cmsis_stream.cg.scheduler import *
+
+class DebugProcess(GenericNode):
+    def __init__(self, name, theType, inLength):
+        GenericNode.__init__(self, name, identified=True)
+        self.addInput("i", theType, inLength)
+        self.addOutput("o", theType, 1)
+
+    @property
+    def typeName(self):
+        return "DebugProcess"

Examples/hello_posix/python/nodes/DebugSink.py

@@ -0,0 +1,11 @@
+from cmsis_stream.cg.scheduler import *
+
+class DebugSink(GenericSink):
+    def __init__(self, name, theType):
+        GenericSink.__init__(self, name, selectors=["message"])
+        self.addInput("i", theType, 1)
+        self.addEventOutput()
+
+    @property
+    def typeName(self):
+        return "DebugSink"

Examples/hello_posix/python/nodes/DebugSource.py

@@ -0,0 +1,11 @@
+from cmsis_stream.cg.scheduler import *
+
+class DebugSource(GenericSource):
+    def __init__(self, name, theType, inLength):
+        GenericSource.__init__(self, name, identified=True)
+        self.addOutput("o", theType, inLength)
+        self.addVariableArg(f"params->{name}")
+
+    @property
+    def typeName(self):
+        return "DebugSource"

Examples/hello_posix/python/nodes/__init__.py

@@ -0,0 +1,4 @@
+from .DebugEvtSink import *
+from .DebugProcess import *
+from .DebugSource import *
+from .DebugSink import *