utils

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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