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Update src/hardware/dac.rs

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Co-authored-by: Robert Jördens <rj@quartiq.de>
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Ryan Summers 2021-05-07 14:23:03 +02:00 committed by GitHub
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src/hardware/dac.rs
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@ -82,7 +82,7 @@ impl Into<f32> for DacCode {
// the output stage is +/- 10.24 V. At a DAC code of zero, there is an output of -10.24 V, // the output stage is +/- 10.24 V. At a DAC code of zero, there is an output of -10.24 V,
// and at a max DAC code, there is an output of (slightly less than) 10.24 V. // and at a max DAC code, there is an output of (slightly less than) 10.24 V.
let dac_volts_per_lsb = 10.24 * 2.0 / u16::MAX as f32; let dac_volts_per_lsb = 4.096 * 2.5 / (1u16 << 15) as f32;
// Note that the bipolar table is an offset-binary code, but it is much more logical and // Note that the bipolar table is an offset-binary code, but it is much more logical and
// correct to treat it as a twos-complement value. TO do that, we XOR the most significant // correct to treat it as a twos-complement value. TO do that, we XOR the most significant