Set vivado DWC input width explicitly as by default a block will have a 1 byte...

Set vivado DWC input width explicitly as by default a block will have a 1 byte input which probably will cause a bottleneck (#254)

src/finn/custom_op/fpgadataflow/streamingdatawidthconverter_batch.py

@@ -408,9 +408,14 @@ class StreamingDataWidthConverter_Batch(HLSCustomOp):
             )
             cmd.append(
                 "set_property -dict "
-                "[list CONFIG.S_TDATA_NUM_BYTES.VALUE_SRC PROPAGATED] "
+                "[list CONFIG.S_TDATA_NUM_BYTES.VALUE_SRC USER] "
                 "[get_bd_cells /%s/dwc]" % node_name
             )
+            cmd.append(
+                "set_property -dict "
+                "[list CONFIG.S_TDATA_NUM_BYTES {%d}] [get_bd_cells /%s/dwc]"
+                % (np.ceil(self.get_instream_width() / 8), node_name)
+            )
             cmd.append(
                 "set_property -dict "
                 "[list CONFIG.M_TDATA_NUM_BYTES {%d}] [get_bd_cells /%s/dwc]"