/
txrx.py
executable file
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txrx.py
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#!/usr/bin/env python3
###############################################################################
#
# Copyright (c) 2018-present Nuand LLC
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
###############################################################################
#
# Basic example of using bladeRF Python bindings for full duplex TX/RX.
# Review the companion txrx.ini to adjust configuration options.
#
###############################################################################
import sys
import os
import threading
from multiprocessing.pool import ThreadPool
from configparser import ConfigParser
from bladerf import _bladerf
# =============================================================================
# Close the device and exit
# =============================================================================
def shutdown( error = 0, board = None ):
print( "Shutting down with error code: " + str(error) )
if( board != None ):
board.close()
sys.exit(error)
# =============================================================================
# Version information
# =============================================================================
def print_versions( device = None ):
print( "libbladeRF version: " + str(_bladerf.version()) )
if( device != None ):
try:
print( "Firmware version: " + str(device.get_fw_version()) )
except:
print( "Firmware version: " + "ERROR" )
raise
try:
print( "FPGA version: " + str(device.get_fpga_version()) )
except:
print( "FPGA version: " + "ERROR" )
raise
return 0
# =============================================================================
# Search for a bladeRF device attached to the host system
# Returns a bladeRF device handle.
# =============================================================================
def probe_bladerf():
device = None
print( "Searching for bladeRF devices..." )
try:
devinfos = _bladerf.get_device_list()
if( len(devinfos) == 1 ):
device = "{backend}:device={usb_bus}:{usb_addr}".format(**devinfos[0]._asdict())
print( "Found bladeRF device: " + str(device) )
if( len(devinfos) > 1 ):
print( "Unsupported feature: more than one bladeRFs detected." )
print( "\n".join([str(devinfo) for devinfo in devinfos]) )
shutdown( error = -1, board = None )
except _bladerf.BladeRFError:
print( "No bladeRF devices found." )
pass
return device
# =============================================================================
# Load FPGA
# =============================================================================
def load_fpga( device, image ):
image = os.path.abspath( image )
if( not os.path.exists(image) ):
print( "FPGA image does not exist: " + str(image) )
return -1
try:
print( "Loading FPGA image: " + str(image ) )
device.load_fpga( image )
fpga_loaded = device.is_fpga_configured()
fpga_version = device.get_fpga_version()
if( fpga_loaded ):
print( "FPGA successfully loaded. Version: " + str(fpga_version) )
except _bladerf.BladeRFError:
print( "Error loading FPGA." )
raise
return 0
# =============================================================================
# TRANSMIT
# =============================================================================
def transmit( device, channel : int, freq : int, rate : int, gain : int,
tx_start = None, rx_done = None,
txfile : str = '', repeat : int = 1, ):
if( device == None ):
print( "TX: Invalid device handle." )
return -1
if( channel == None ):
print( "TX: Invalid channel." )
return -1
if( (rx_done == None) and (repeat < 1) ):
print( "TX: Configuration settings indicate transmitting indefinitely?" )
return -1
if( tx_start != None ):
print( "TX: waiting until receive thread is ready..." )
if( not tx_start.wait(60.0) ):
print( "TX: Timeout occurred while waiting for receiver to " +
"become ready." )
return -1
# Configure bladeRF
ch = device.Channel(channel)
ch.frequency = freq
ch.sample_rate = rate
ch.gain = gain
# Setup stream
device.sync_config(layout=_bladerf.ChannelLayout.TX_X1,
fmt=_bladerf.Format.SC16_Q11,
num_buffers=16,
buffer_size=8192,
num_transfers=8,
stream_timeout=3500)
# Enable module
print( "TX: Start" )
ch.enable = True
# Create buffer
bytes_per_sample = 4
buf = bytearray(1024*bytes_per_sample)
with open(txfile, 'rb') as infile:
# Read samples from file into buf
num = infile.readinto(buf)
# Convert number of bytes read to samples
num //= bytes_per_sample
if( num > 0 ):
repeats_remaining = repeat - 1
repeat_inf = (repeat < 1)
while True:
# Write to bladeRF
device.sync_tx(buf, num)
if( (rx_done != None) and rx_done.is_set() ):
break
if( not repeat_inf ):
if( repeats_remaining > 0 ):
repeats_remaining -= 1
else:
break
# Disable module
print( "TX: Stop" )
ch.enable = False
return 0
# =============================================================================
# RECEIVE
# =============================================================================
def receive(device, channel : int, freq : int, rate : int, gain : int,
tx_start = None, rx_done = None,
rxfile : str = '', num_samples : int = 1024):
status = 0
if( device == None ):
print( "RX: Invalid device handle." )
return -1
if( channel == None ):
print( "RX: Invalid channel." )
return -1
# Configure BladeRF
ch = device.Channel(channel)
ch.frequency = freq
ch.sample_rate = rate
ch.gain = gain
# Setup synchronous stream
device.sync_config(layout = _bladerf.ChannelLayout.RX_X1,
fmt = _bladerf.Format.SC16_Q11,
num_buffers = 16,
buffer_size = 8192,
num_transfers = 8,
stream_timeout = 3500)
# Enable module
print( "RX: Start" )
ch.enable = True
# Create receive buffer
bytes_per_sample = 4
buf = bytearray(1024*bytes_per_sample)
num_samples_read = 0
# Tell TX thread to begin
if( tx_start != None ):
tx_start.set()
# Save the samples
with open(rxfile, 'wb') as outfile:
while True:
if num_samples > 0 and num_samples_read == num_samples:
break
elif num_samples > 0:
num = min(len(buf)//bytes_per_sample,
num_samples-num_samples_read)
else:
num = len(buf)//bytes_per_sample
# Read into buffer
device.sync_rx(buf, num)
num_samples_read += num
# Write to file
outfile.write(buf[:num*bytes_per_sample])
# Disable module
print( "RX: Stop" )
ch.enable = False
if( rx_done != None ):
rx_done.set()
print( "RX: Done" )
return 0
# =============================================================================
# Load Configuration
# =============================================================================
config = ConfigParser()
config.read('txrx.ini')
# Set libbladeRF verbosity level
verbosity = config.get('common', 'libbladerf_verbosity').upper()
if ( verbosity == "VERBOSE" ): _bladerf.set_verbosity( 0 )
elif( verbosity == "DEBUG" ): _bladerf.set_verbosity( 1 )
elif( verbosity == "INFO" ): _bladerf.set_verbosity( 2 )
elif( verbosity == "WARNING" ): _bladerf.set_verbosity( 3 )
elif( verbosity == "ERROR" ): _bladerf.set_verbosity( 4 )
elif( verbosity == "CRITICAL" ): _bladerf.set_verbosity( 5 )
elif( verbosity == "SILENT" ): _bladerf.set_verbosity( 6 )
else:
print( "Invalid libbladerf_verbosity specified in configuration file:",
verbosity )
shutdown( error = -1, board = None )
# =============================================================================
# BEGIN !!!
# =============================================================================
uut = probe_bladerf()
if( uut == None ):
print( "No bladeRFs detected. Exiting." )
shutdown( error = -1, board = None )
b = _bladerf.BladeRF( uut )
board_name = b.board_name
fpga_size = b.fpga_size
if( config.getboolean(board_name + '-load-fpga', 'enable') ):
print( "Loading FPGA..." )
try:
status = load_fpga( b, config.get(board_name + '-load-fpga',
'image_' + str(fpga_size) + 'kle' ) )
except:
print( "ERROR loading FPGA." )
raise
if( status < 0 ):
print( "ERROR loading FPGA." )
shutdown( error = status, board = b )
else:
print( "Skipping FPGA load due to configuration setting." )
status = print_versions( device = b )
# TODO: can we have >1 rx/tx pool workers because 2x2 MIMO?
rx_pool = ThreadPool(processes=1)
tx_pool = ThreadPool(processes=1)
for s in [ss for ss in config.sections() if board_name + '-' in ss]:
if( s == board_name + "-load-fpga" ):
# Don't re-loading the FPGA!
continue
# Print the section name
print( "{:<35s} : ".format(s), end='' )
if( config.getboolean(s, 'enable') ):
print( "RUNNING" )
if( s == board_name + '-tx' ):
tx_ch = _bladerf.CHANNEL_TX(config.getint(s, 'tx_channel'))
tx_freq = int(config.getfloat(s, 'tx_frequency'))
tx_rate = int(config.getfloat(s, 'tx_samplerate'))
tx_gain = int(config.getfloat(s, 'tx_gain'))
tx_rpt = int(config.getfloat(s, 'tx_repeats'))
tx_file = config.get(s, 'tx_file')
# Make this blocking for now ...
status = tx_pool.apply_async(transmit,
(),
{ 'device' : b,
'channel' : tx_ch,
'freq' : tx_freq,
'rate' : tx_rate,
'gain' : tx_gain,
'tx_start' : None,
'rx_done' : None,
'txfile' : tx_file,
'repeat' : tx_rpt
}).get()
if( status < 0 ):
print( "Transmit operation failed with error " + str(status) )
elif( s == board_name + '-rx' ):
rx_ch = _bladerf.CHANNEL_RX(config.getint(s, 'rx_channel'))
rx_freq = int(config.getfloat(s, 'rx_frequency'))
rx_rate = int(config.getfloat(s, 'rx_samplerate'))
rx_gain = int(config.getfloat(s, 'rx_gain'))
rx_ns = int(config.getfloat(s, 'rx_num_samples'))
rx_file = config.get(s, 'rx_file')
# Make this blocking for now ...
status = rx_pool.apply_async(receive,
(),
{ 'device' : b,
'channel' : rx_ch,
'freq' : rx_freq,
'rate' : rx_rate,
'gain' : rx_gain,
'tx_start' : None,
'rx_done' : None,
'rxfile' : rx_file,
'num_samples' : rx_ns
}).get()
if( status < 0 ):
print( "Receive operation failed with error " + str(status) )
elif( s == board_name + '-txrx' ):
rx_channels = [x.strip() for x in config.get(s, 'rx_channel').split(',')]
tx_channels = [x.strip() for x in config.get(s, 'tx_channel').split(',')]
rx_freqs = [x.strip() for x in config.get(s, 'rx_frequency').split(',')]
tx_freqs = [x.strip() for x in config.get(s, 'tx_frequency').split(',')]
if( len(rx_channels) != len(tx_channels) ):
print( "Configuration error in section " + s + ": "
"rx_channels and tx_channels must be the same length." )
shutdown( error = -1, board = b )
if( len(rx_freqs) != len(tx_freqs) ):
print( "Configuration error in section " + s + ": "
"rx_frequency and tx_frequency must be the same length." )
shutdown( error = -1, board = b )
# Create Events for signaling between RX/TX threads
rx_done = threading.Event()
tx_start = threading.Event()
for ch in range(0, len(rx_channels), 1):
for freq in range(0, len(rx_freqs), 1):
rx_ch = _bladerf.CHANNEL_RX(int(rx_channels[ch]))
rx_freq = int(float(rx_freqs[freq]))
rx_rate = int(config.getfloat(s, 'rx_samplerate'))
rx_gain = int(config.getfloat(s, 'rx_gain'))
rx_ns = int(config.getfloat(s, 'rx_num_samples'))
rx_file = config.get(s, 'rx_file')
if( rx_file == "auto" ):
rx_file = "rx_" + \
"r" + rx_channels[ch] + \
"t" + tx_channels[ch] + "_" + \
str(int(float(rx_freqs[freq])/(1e6))) + "M.bin"
tx_ch = _bladerf.CHANNEL_TX(int(tx_channels[ch]))
tx_freq = int(float(tx_freqs[freq]))
tx_rate = int(config.getfloat(s, 'tx_samplerate'))
tx_gain = int(config.getfloat(s, 'tx_gain'))
tx_rpt = int(config.getfloat(s, 'tx_repeats'))
tx_file = config.get(s, 'tx_file')
print( "rx_ch = {:2d} ".format(int(rx_channels[ch])) +
"tx_ch = {:2d} ".format(int(tx_channels[ch])) +
"rx_freq = {:10d} ".format(rx_freq) +
"tx_freq = {:10d} ".format(tx_freq) +
"rx_file = " + rx_file )
# Start receiver thread
rx_result = rx_pool.apply_async(receive,
(),
{ 'device' : b,
'channel' : rx_ch,
'freq' : rx_freq,
'rate' : rx_rate,
'gain' : rx_gain,
'tx_start' : tx_start,
'rx_done' : rx_done,
'rxfile' : rx_file,
'num_samples' : rx_ns
})
# Start transmitter thread
tx_result = tx_pool.apply_async(transmit,
(),
{ 'device' : b,
'channel' : tx_ch,
'freq' : tx_freq,
'rate' : tx_rate,
'gain' : tx_gain,
'tx_start' : tx_start,
'rx_done' : rx_done,
'txfile' : tx_file,
'repeat' : tx_rpt
})
# Wait for RX thread to finish
rx_result.wait()
status = rx_result.get()
if( status < 0 ):
print( "Receive operation failed with error " +
str(status) )
# Wait for TX thread to finish
tx_result.wait()
status = tx_result.get()
if( status < 0 ):
print( "Transmit operation failed with error " +
str(status) )
tx_start.clear()
rx_done.clear()
else:
print( "SKIPPED [ Disabled ]" )
b.close()
print( "Done!" )