Mon Oct 2 13:20:44 2017 options author window_size category [GRC Hier Blocks] comment description _enabled True _coordinate (8, 8) _rotation 0 generate_options wx_gui hier_block_src_path .: id top_block max_nouts 0 qt_qss_theme realtime_scheduling run_command {python} -u {filename} run_options prompt run True thread_safe_setters title variable comment _enabled True _coordinate (192, 20) _rotation 0 id samp_rate value 32000 epy_block alias _io_cache ('ED_block', 'ener_det', [('num_values', '1024'), ('Vec_Length', '1024')], [('0', 'float', 1)], [], '\n docstring for block set_gain\n ', ['num_values']) _source_code """ Embedded Python Blocks: Each time this file is saved, GRC will instantiate the first class it finds to get ports and parameters of your block. The arguments to __init__ will be the parameters. All of them are required to have default values! """ import numpy as np from gnuradio import gr import pmt import random import math from itertools import islice class ener_det(gr.basic_block): """ docstring for block set_gain """ def __init__(self, num_values=1024, Vec_Length=1024): gr.basic_block.__init__(self, name="ED_block", in_sig=[np.float32], out_sig=[]) #self.Vec_Length = Vec_Length self.num_values = num_values self.seen = 0 #keeps a count of how many samples have been seen def forecast(self, noutput_items, ninput_items_required): #setup size of input_items[i] for work call for i in range(len(ninput_items_required)): ninput_items_required[i] = noutput_items def general_work(self, input_items, output_items): in0 = input_items[0] self.seen+=in0.shape[0] print "Number of input items:", self.seen if self.seen>self.num_values: in1= islice(in0, 1024) #1024 values are taken from the variable in0 and stored in in1 # b = float(in1) #values stored in in1 are converted to floats c = math.log10(in1) #converts 1024 values stored in in1 to dB and stores them in c if c.all() > 5.0: #checks if any of the values stored in c are greater than c print "A signal is present" #print "The values greater than the threshold are", a>5 else: print "No signal is present" self.seen = 0 self.consume_each(in0.shape[0]) #consume everything you've account for # tell system to move on to next samples return 0 ##return 0 samples generated ## as the block doesn't have an output stream comment _enabled 1 _coordinate (952, 388) _rotation 0 id Ener_detec num_values 1024 Vec_Length 1024 analog_noise_source_x amp 1 alias comment affinity _enabled 1 _coordinate (72, 220) _rotation 0 id analog_noise_source_x_0 maxoutbuf 0 minoutbuf 0 noise_type analog.GR_GAUSSIAN type complex seed 0 analog_sig_source_x amp .5 alias comment affinity _enabled True freq 8000 _coordinate (40, 92) _rotation 0 id analog_sig_source_x_0 maxoutbuf 0 minoutbuf 0 offset 0 type complex samp_rate samp_rate waveform analog.GR_COS_WAVE blocks_add_xx alias comment affinity _enabled 1 _coordinate (304, 272) _rotation 0 id blocks_add_xx_0 type complex maxoutbuf 0 minoutbuf 0 num_inputs 2 vlen 1 blocks_complex_to_mag_squared alias comment affinity _enabled 1 _coordinate (720, 400) _rotation 0 id blocks_complex_to_mag_squared_0 maxoutbuf 0 minoutbuf 0 vlen 1 blocks_file_sink append False alias comment affinity _enabled 1 file /home/tellrell/Desktop/fft.dat _coordinate (328, 548) _rotation 0 id blocks_file_sink_0 type complex unbuffered False vlen 1024 blocks_file_sink append False alias comment affinity _enabled 1 file /home/tellrell/Desktop/com2mag.dat _coordinate (680, 572) _rotation 0 id blocks_file_sink_0_0 type float unbuffered False vlen 1 blocks_stream_to_vector alias comment affinity _enabled 1 _coordinate (40, 420) _rotation 0 id blocks_stream_to_vector_0 type complex maxoutbuf 0 minoutbuf 0 num_items 1024 vlen 1 blocks_throttle alias comment affinity _enabled 1 _coordinate (392, 164) _rotation 0 id blocks_throttle_0 ignoretag True maxoutbuf 0 minoutbuf 0 samples_per_second samp_rate type complex vlen 1 blocks_vector_to_stream alias comment affinity _enabled 1 _coordinate (504, 420) _rotation 0 id blocks_vector_to_stream_0 type complex maxoutbuf 0 minoutbuf 0 num_items 1024 vlen 1 fft_vxx alias comment affinity _enabled 1 fft_size 1024 forward True _coordinate (240, 388) _rotation 0 id fft_vxx_0 type complex maxoutbuf 0 minoutbuf 0 nthreads 1 shift True window window.blackmanharris(1024) wxgui_fftsink2 avg_alpha 0 average False baseband_freq 0 alias comment affinity _enabled 1 fft_size 1024 freqvar None _coordinate (608, 164) _rotation 0 grid_pos id wxgui_fftsink2_0 notebook peak_hold False ref_level 0 ref_scale 2.0 fft_rate 15 samp_rate samp_rate title FFT Plot type complex win_size win window.blackmanharris y_divs 10 y_per_div 10 analog_noise_source_x_0 blocks_add_xx_0 0 1 analog_sig_source_x_0 blocks_add_xx_0 0 0 blocks_add_xx_0 blocks_stream_to_vector_0 0 0 blocks_add_xx_0 blocks_throttle_0 0 0 blocks_complex_to_mag_squared_0 Ener_detec 0 0 blocks_complex_to_mag_squared_0 blocks_file_sink_0_0 0 0 blocks_stream_to_vector_0 fft_vxx_0 0 0 blocks_throttle_0 wxgui_fftsink2_0 0 0 blocks_vector_to_stream_0 blocks_complex_to_mag_squared_0 0 0 fft_vxx_0 blocks_file_sink_0 0 0 fft_vxx_0 blocks_vector_to_stream_0 0 0