bitfile.py 文件源码

def __init__(self, filepath):
        self._filepath = os.path.abspath(filepath)
        tree = ElementTree().parse(self._filepath)
        self._signature = tree.find("SignatureRegister").text.upper()

        project = tree.find("Project")
        nifpga = project.find("CompilationResultsTree") \
                        .find("CompilationResults") \
                        .find("NiFpga")
        self._base_address_on_device = int(nifpga.find("BaseAddressOnDevice").text)
        self._registers = {}
        for reg_xml in tree.find("VI").find("RegisterList"):
            reg = Register(reg_xml)
            if reg.datatype is not None:
                assert reg.name not in self._registers, \
                    "One or more registers have the same name '%s', this is not supported" % reg.name
                self._registers[reg.name] = reg

        self._fifos = {}
        for channel_xml in nifpga.find("DmaChannelAllocationList"):
            fifo = Fifo(channel_xml)
            self._fifos[fifo.name] = fifo