def read(self,
t: HdlType,
tmpl: Optional[TransTmpl] = None,
frames: Optional[List[FrameTmpl]] = None,
id_=0) -> Union[UnionSource, StructIntf, Handshaked]:
"""
:param ~.t: instance of HStruct which specifies data format to download
:param ~.tmpl: instance of TransTmpl for this t
:param ~.frames: list of FrameTmpl instances for this tmpl
:param ~.id_: id_ value for axi
:note: if tmpl and frames are None they are resolved from structT parseTemplate
:note: A single transaction can be split to multiple frames, if they are specified by "frames".
"""
axi = self.end
r = StructReader(t, tmpl=tmpl, frames=frames)
r.ID_WIDTH = 0
r.ADDR_WIDTH = axi.ADDR_WIDTH
r.DATA_WIDTH = axi.DATA_WIDTH
setattr(self.parent, self._findSuitableName("rReader"), r)
self._propagateClkRstn(r)
dp = Axi_rDatapump(axi.__class__)
dp.ADDR_WIDTH = axi.ADDR_WIDTH
dp.ID_WIDTH = axi.ID_WIDTH
dp.DATA_WIDTH = axi.DATA_WIDTH
dp.USE_STRB = False
dp.ID_VAL = id_
dp.MAX_TRANS_OVERLAP = self.max_trans_overlap
dp.ALIGNAS = self.alignas
if isinstance(t, HStream):
raise NotImplementedError()
else:
dp.MAX_CHUNKS = 1
dp.CHUNK_WIDTH = r.rDatapump.MAX_BYTES * 8
setattr(self.parent, self._findSuitableName("rDataPump"), dp)
self._propagateClkRstn(dp)
connectDp(self.parent, r, dp, self.end)
return r.get, r.dataOut
def test_multiframe(self):
tmpl = TransTmpl(s0)
DATA_WIDTH = 64
frames = list(
FrameTmpl.framesFromTransTmpl(tmpl,
DATA_WIDTH,
maxPaddingWords=0,
trimPaddingWordsOnStart=True,
trimPaddingWordsOnEnd=True))
u = StructReader(s0, tmpl=tmpl, frames=frames)
self._test_s0(u)
def _declr(self):
addClkRstn(self)
with self._paramsShared():
self.axi_m = Axi3()._m()
a = self.packetAddr = Handshaked()
a._replaceParam(a.DATA_WIDTH, self.ADDR_WIDTH)
with self._paramsShared():
self.rxPacketLoader = StructReader(frameHeader)
self.rxDataPump = Axi_rDatapump(Axi3_addr)
self.txPacketUpdater = StructWriter(frameHeader)
self.txDataPump = Axi_wDatapump(Axi3_addr, Axi3_w)
for o in (self.txPacketUpdater, self.txDataPump):
o.USE_STRB.set(True)
def test_simpleFields(self):
u = StructReader(s0)
self._test_s0(u)
def _config(self):
StructReader._config(self)
self.MAX_OVERLAP = Param(2)
self.WRITE_ACK = Param(False)