25 lines
521 B
Python
25 lines
521 B
Python
import sys, os
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sample_rate = 48e6
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ref_frequency = 1.97e6
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ref_phase = 0
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ref_ftw = int(ref_frequency*2**32/sample_rate)
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fp = os.fdopen(sys.stdout.fileno(), "wb")
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while True:
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sample = 0
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for _ in range(2):
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sample <<= 2
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ref_phase = (ref_phase + ref_ftw) & 0xffffffff
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delta = 0
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meas_phase = (ref_phase + delta) & 0xffffffff
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if ref_phase >= 0x80000000:
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sample |= 0x01
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if meas_phase >= 0x80000000:
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sample |= 0x02
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fp.write(bytes([sample]))
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