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Fixing modulation waveform scale

This commit is contained in:
Ryan Summers 2021-05-06 14:36:57 +02:00
parent 9569df9e82
commit 4780a97528
1 changed files with 1 additions and 1 deletions
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src/bin/lockin.rs
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@ -20,7 +20,7 @@ use stabilizer::net::{Action, MqttInterface};
// A constant sinusoid to send on the DAC output. // A constant sinusoid to send on the DAC output.
// Full-scale gives a +/- 10.24V amplitude waveform. Scale it down to give +/- 1V. // Full-scale gives a +/- 10.24V amplitude waveform. Scale it down to give +/- 1V.
const ONE: i16 = ((1.0 / 10.24) * u16::MAX as f32) as _; const ONE: i16 = ((1.0 / 10.24) * i16::MAX as f32) as _;
const SQRT2: i16 = (ONE as f32 * 0.707) as _; const SQRT2: i16 = (ONE as f32 * 0.707) as _;
const DAC_SEQUENCE: [i16; design_parameters::SAMPLE_BUFFER_SIZE] = const DAC_SEQUENCE: [i16; design_parameters::SAMPLE_BUFFER_SIZE] =
[ONE, SQRT2, 0, -SQRT2, -ONE, -SQRT2, 0, SQRT2]; [ONE, SQRT2, 0, -SQRT2, -ONE, -SQRT2, 0, SQRT2];