Hi all,
I was trying to run the ex_1layer example for neural networks on FPGA.
Although the flowgraph starts, I get a series of ''timeout on chan0" and
no output is produced.
Any suggestion?
Thanks,
Francesco
Below is my code:
###############################################
#!/usr/bin/env python2
# -*- coding: utf-8 -*-
##################################################
# GNU Radio Python Flow Graph
# Title: Nnet Example 1Layer
# Generated: Thu Apr 12 08:45:12 2018
##################################################
from gnuradio import blocks
from gnuradio import eng_notation
from gnuradio import gr
from gnuradio import uhd
from gnuradio.eng_option import eng_option
from gnuradio.filter import firdes
from optparse import OptionParser
import ettus
import pmt
class nnet_example_1layer(gr.top_block):
def __init__(self, args=""):
gr.top_block.__init__(self, "Nnet Example 1Layer")
##################################################
# Parameters
##################################################
self.args = args
##################################################
# Variables
##################################################
self.device3 = variable_uhd_device3_0 =
ettus.device3(uhd.device_addr_t( ",".join(('type=x300', '')) ))
self.samp_rate = samp_rate = 784*1000
##################################################
# Blocks
##################################################
self.uhd_rfnoc_streamer_fifo_0 = ettus.rfnoc_generic(
self.device3,
uhd.stream_args( # TX Stream Args
cpu_format="u8",
otw_format="u8",
args="gr_vlen=2,spp=2"
),
uhd.stream_args( # RX Stream Args
cpu_format="u8",
otw_format="u8",
args="gr_vlen=2,spp=2"
),
"FIFO", 0, -1,
)
self.fpgannet_ex1layer_0 = ettus.rfnoc_generic(
self.device3,
uhd.stream_args(
cpu_format="s16",
otw_format="s16",
args="gr_vlen=1,spp=1"
),
uhd.stream_args(
cpu_format="s16",
otw_format="s16",
args="gr_vlen=1,spp=1"
),
"ex1layer", -1, -1,
)
self.blocks_throttle_0 = blocks.throttle(gr.sizeof_short*1,
samp_rate,True)
self.blocks_null_sink_0 = blocks.null_sink(gr.sizeof_short*1)
self.blocks_file_source_0 =
blocks.file_source(gr.sizeof_short*1, 'mnist_data_input.s16', False)
self.blocks_file_source_0.set_begin_tag(pmt.PMT_NIL)
self.blocks_file_sink_0 = blocks.file_sink(gr.sizeof_short*1,
'mnist_rfnoc_output.s16', False)
self.blocks_file_sink_0.set_unbuffered(False)
self.blocks_deinterleave_0 =
blocks.deinterleave(gr.sizeof_short*1, 1)
self.blocks_copy_0 = blocks.copy(gr.sizeof_short*1)
self.blocks_copy_0.set_enabled(True)
##################################################
# Connections
##################################################
self.connect((self.blocks_copy_0, 0),
(self.blocks_deinterleave_0, 0))
self.connect((self.blocks_deinterleave_0, 0),
(self.blocks_file_sink_0, 0))
self.connect((self.blocks_deinterleave_0, 1),
(self.blocks_null_sink_0, 0))
self.connect((self.blocks_file_source_0, 0),
(self.blocks_throttle_0, 0))
self.connect((self.blocks_throttle_0, 0),
(self.uhd_rfnoc_streamer_fifo_0, 0))
self.connect((self.fpgannet_ex1layer_0, 0),
(self.blocks_copy_0, 0))
self.device3.connect(self.uhd_rfnoc_streamer_fifo_0.get_block_id(), 0,
self.fpgannet_ex1layer_0.get_block_id(), 0)
def get_args(self):
return self.args
def set_args(self, args):
self.args = args
def get_variable_uhd_device3_0(self):
return self.variable_uhd_device3_0
def set_variable_uhd_device3_0(self, variable_uhd_device3_0):
self.variable_uhd_device3_0 = variable_uhd_device3_0
def get_samp_rate(self):
return self.samp_rate
def set_samp_rate(self, samp_rate):
self.samp_rate = samp_rate
self.blocks_throttle_0.set_sample_rate(self.samp_rate)
def argument_parser():
parser = OptionParser(usage="%prog: [options]",
option_class=eng_option)
parser.add_option(
"", "--args", dest="args", type="string", default="",
help="Set args [default=%default]")
return parser
def main(top_block_cls=nnet_example_1layer, options=None):
if options is None:
options, _ = argument_parser().parse_args()
tb = top_block_cls(args=options.args)
tb.start()
try:
raw_input('Press Enter to quit: ')
except EOFError:
pass
tb.stop()
tb.wait()
if __name__ == '__main__':
main()
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