CMSIS-DSP/ComputeGraph/examples/cyclo/nodes.py

# Include definitions from the Python package
from cmsisdsp.cg.scheduler import GenericNode,GenericSink,GenericSource

### Define new types of Nodes 

class ProcessingNode(GenericNode):
    """
    Definition of a ProcessingNode for the graph

    Parameters
    ----------
    name : str
         Name of the C variable identifying this node 
         in the C code
    theType : CGStaticType
            The datatype for the input and output
    inLength : int
             The number of samples consumed by input
    outLength : int 
              The number of samples produced on output
    """
    def __init__(self,name,theType,inLength,outLength):
        GenericNode.__init__(self,name)
        self.addInput("i",theType,inLength)
        self.addOutput("o",theType,outLength)

    @property
    def typeName(self):
        """The name of the C++ class implementing this node"""
        return "ProcessingNode"

class Sink(GenericSink):
    """
    Definition of a Sink node for the graph

    Parameters
    ----------
    name : str
         Name of the C variable identifying this node 
         in the C code
    theType : CGStaticType
            The datatype for the input
    inLength : int
             The number of samples consumed by input
    """
    def __init__(self,name,theType,inLength):
        GenericSink.__init__(self,name)
        self.addInput("i",theType,inLength)

    @property
    def typeName(self):
        """The name of the C++ class implementing this node"""
        return "Sink"

class Source(GenericSource):
    """
    Definition of a Source node for the graph

    Parameters
    ----------
    name : str
         Name of the C variable identifying this node 
         in the C code
    theType : CGStaticType
            The datatype for the output
    outLength : int 
              The number of samples produced on output
    """
    def __init__(self,name,theType,outLength):
        GenericSource.__init__(self,name)
        self.addOutput("o",theType,outLength)

    @property
    def typeName(self):
        """The name of the C++ class implementing this node"""
        return "Source"