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Diffstat (limited to 'utils.py')
| -rw-r--r-- | utils.py | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/utils.py b/utils.py new file mode 100644 index 0000000..ffa671f --- /dev/null +++ b/utils.py @@ -0,0 +1,31 @@ + +# given the cmdline arg, turns the byte sequencies into a list of frequencies, and vice versa + +# 1875 1924 +24, -25, range/2, 1, flipping new info 2 sending or not + + +def make_frequencies_map(start_freq, freq_step, byte_per_transmit, is_sender=True): + freq_list = [None] * (byte_per_transmit + 3) + sender_range = freq_step // 2 + plus_minus = sender_range // (byte_per_transmit + 3) + + for i in range(byte_per_transmit + 3): + freq_list[i] = start_freq + i * plus_minus + if not is_sender: + freq_list[i] += sender_range + + return freq_list + + +def frequencies_to_bytes(frequencies, start_freq, freq_step, byte_per_transmit, is_sender=True): + freq_list = make_frequencies_map(start_freq, freq_step, byte_per_transmit, is_sender) + byte_list = [None] * len(frequencies) + + sender_range = freq_step // 2 + plus_minus = sender_range // (byte_per_transmit + 3) + + for i in range(len(frequencies)): + byte_list[i] = 0 + if frequencies[i] <= freq_list[i] < frequencies[i] + plus_minus - 1: byte_list[i] = 1 + + return byte_list
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