# Boston, MA 02110-1301, USA.
#
+from gnuradio import eng_notation
+
_default_bitrate = 500e3
_valid_samples_per_symbol = (2,3,4,5,6,7)
-def _gen_tx_info(converter_rate):
+def _gen_tx_info(converter_rate, xrates):
results = []
for samples_per_symbol in _valid_samples_per_symbol:
- for interp in range(16, 512 + 1, 4):
+ for interp in xrates:
bitrate = converter_rate / interp / samples_per_symbol
results.append((bitrate, samples_per_symbol, interp))
results.sort()
return results
-def _gen_rx_info(converter_rate):
+def _gen_rx_info(converter_rate, xrates):
results = []
for samples_per_symbol in _valid_samples_per_symbol:
- for decim in range(8, 256 + 1, 2):
+ for decim in xrates:
bitrate = converter_rate / decim / samples_per_symbol
results.append((bitrate, samples_per_symbol, decim))
results.sort()
return ((best[0] * bits_per_symbol),) + best[1:]
def _pick_bitrate(bitrate, bits_per_symbol, samples_per_symbol,
- xrate, converter_rate, gen_info):
+ xrate, converter_rate, xrates, gen_info):
"""
@returns tuple (bitrate, samples_per_symbol, interp_rate_or_decim_rate)
"""
# now we have a target bitrate and possibly an xrate or
# samples_per_symbol constraint, but not both of them.
- return _pick_best(bitrate, bits_per_symbol,
- _filter_info(gen_info(converter_rate), samples_per_symbol, xrate))
+ ret = _pick_best(bitrate, bits_per_symbol,
+ _filter_info(gen_info(converter_rate, xrates), samples_per_symbol, xrate))
+ print "Actual Bitrate:", eng_notation.num_to_str(ret[0])
+ return ret
# ---------------------------------------------------------------------------------------
def pick_tx_bitrate(bitrate, bits_per_symbol, samples_per_symbol,
- interp_rate, converter_rate=128e6):
+ interp_rate, converter_rate, possible_interps):
"""
Given the 4 input parameters, return at configuration that matches
@type interp_rate: integer or None
@param converter_rate: converter sample rate in Hz
@type converter_rate: number
+ @param possible_interps: a list of possible rates
+ @type possible_interps: a list of integers
@returns tuple (bitrate, samples_per_symbol, interp_rate)
"""
+ print "Requested TX Bitrate:", bitrate and eng_notation.num_to_str(bitrate) or 'Auto',
return _pick_bitrate(bitrate, bits_per_symbol, samples_per_symbol,
- interp_rate, converter_rate, _gen_tx_info)
+ interp_rate, converter_rate, possible_interps, _gen_tx_info)
def pick_rx_bitrate(bitrate, bits_per_symbol, samples_per_symbol,
- decim_rate, converter_rate=64e6):
+ decim_rate, converter_rate, possible_decims):
"""
Given the 4 input parameters, return at configuration that matches
@type decim_rate: integer or None
@param converter_rate: converter sample rate in Hz
@type converter_rate: number
+ @param possible_decims: a list of possible rates
+ @type possible_decims: a list of integers
@returns tuple (bitrate, samples_per_symbol, decim_rate)
"""
+ print "Requested RX Bitrate:", bitrate and eng_notation.num_to_str(bitrate) or 'Auto'
return _pick_bitrate(bitrate, bits_per_symbol, samples_per_symbol,
- decim_rate, converter_rate, _gen_rx_info)
+ decim_rate, converter_rate, possible_decims, _gen_rx_info)