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lockin: scale output

This commit is contained in:
Robert Jördens 2021-01-31 17:41:20 +01:00
parent 82c8fa1a07
commit 80055076b8
1 changed files with 2 additions and 4 deletions
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6
src/bin/lockin.rs
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@ -151,16 +151,14 @@ const APP: () = {
phase = iir_ch[1][j].update(&mut iir_state[1][j], phase); phase = iir_ch[1][j].update(&mut iir_state[1][j], phase);
} }
// TODO: IIR filter DC gain needs to be 1/(1 << 16)
// Note(unsafe): range clipping to i16 is ensured by IIR filters above. // Note(unsafe): range clipping to i16 is ensured by IIR filters above.
// Convert to DAC data. // Convert to DAC data.
for i in 0..dac_samples[0].len() { for i in 0..dac_samples[0].len() {
unsafe { unsafe {
dac_samples[0][i] = dac_samples[0][i] =
power.to_int_unchecked::<i16>() as u16 ^ 0x8000; (power.to_int_unchecked::<i32>() >> 16) as u16 ^ 0x8000;
dac_samples[1][i] = dac_samples[1][i] =
phase.to_int_unchecked::<i16>() as u16 ^ 0x8000; (phase.to_int_unchecked::<i32>() >> 16) as u16 ^ 0x8000;
} }
} }
} }