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iir: fix comment [nfc]

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This commit is contained in:
Robert Jördens 2020-11-25 17:53:13 +01:00
parent cf086abaed
commit 38dfd48c14
2 changed files with 5 additions and 5 deletions
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2
dsp/src/iir.rs
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@ -163,7 +163,7 @@ impl IIR {
debug_assert!(xy.len() == n);
// `xy` contains x0 x1 y0 y1 y2
// Increment time x1 x2 y1 y2 y3
// Rotate y3 x1 x2 y1 y2
// Shift x1 x1 x2 y1 y2
xy.copy_within(0..n - 1, 1); // unrolls better than xy.rotate_right(1)
// Store x0 x0 x1 x2 y1 y2
xy[0] = x0;

8
src/main.rs
View File

@ -758,10 +758,10 @@ const APP: () = {
let x0 = f32::from(*adc0 as i16);
let y0 = c.resources.iir_ch[0]
.update(&mut c.resources.iir_state[0], x0);
// note(unsafe): The filter limits ensure that the value is in range.
// Note(unsafe): The filter limits ensure that the value is in range.
// The truncation introduces 1/2 LSB distortion.
let y0 = unsafe { y0.to_int_unchecked::<i16>() };
// convert to DAC code
// Convert to DAC code
y0 as u16 ^ 0x8000
};
@ -769,10 +769,10 @@ const APP: () = {
let x1 = f32::from(*adc1 as i16);
let y1 = c.resources.iir_ch[1]
.update(&mut c.resources.iir_state[1], x1);
// note(unsafe): The filter limits ensure that the value is in range.
// Note(unsafe): The filter limits ensure that the value is in range.
// The truncation introduces 1/2 LSB distortion.
let y1 = unsafe { y1.to_int_unchecked::<i16>() };
// convert to DAC code
// Convert to DAC code
y1 as u16 ^ 0x8000
};
}