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Added motion test tool

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This commit is contained in:
TQ Hirsch
2022-04-15 22:47:14 +02:00
parent 9c23fcbabb
commit 89358a6aab
7 changed files with 321 additions and 41 deletions
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223
firmware/Cargo.lock generated
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@@ -2,6 +2,229 @@
# It is not intended for manual editing.
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2
firmware/Cargo.toml
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@@ -1,2 +1,2 @@
[workspace]
members = [ "jerk_control" ]
members = [ "jerk_control", "motion-tester" ]

66
firmware/jerk_control/src/executor.rs Normal file
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@@ -0,0 +1,66 @@
use std::cmp::Ordering;
use std::num::Wrapping;
use crate::planner::{Profile, Segment};
#[derive(Default, Debug)]
pub struct CommandQueue {
cur_segment: u8,
cur_time: Wrapping<u32>,
p: Wrapping<i32>,
step_size: i32,
segments: [Segment; 8],
}
impl CommandQueue {
pub fn new() -> Self {
CommandQueue::default()
}
pub fn set_step_size(&mut self, step_size: u32) {
self.step_size = step_size as i32;
}
pub fn set_profile(&mut self, profile: &Profile) {
self.cur_segment = 0;
self.segments[0..8].copy_from_slice(profile.segments.as_slice());
self.cur_time = Wrapping(0);
}
pub fn running(&self) -> bool {
self.segments[self.cur_segment as usize].delta.iter().any(|d| d.0 != 0)
}
// Returns true if step signal should be high
pub fn step(&mut self) -> bool {
let next_seg_idx = (self.cur_segment + 1) % self.segments.len() as u8;
let next_seg_start = self.segments[next_seg_idx as usize].start_time;
let cur_segment = &mut self.segments[self.cur_segment as usize];
self.p.0 = (self.p + cur_segment.delta[0]).0.rem_euclid(self.step_size);
cur_segment.delta[0] += cur_segment.delta[1];
cur_segment.delta[1] += cur_segment.delta[2];
// Advance the segment if necessary.
self.cur_time += Wrapping(1);
if self.cur_time.0 >= next_seg_start && next_seg_start != 0 {
self.cur_segment = next_seg_idx;
cur_segment.start_time = 0;
}
// return state of step line
return self.p.0 < self.step_size / 2;
}
pub fn direction(& self) -> bool {
self.segments[self.cur_segment as usize].delta[0].0 >= 0
}
pub fn time(&self) -> u32 {
self.cur_time.0
}
}

2
firmware/jerk_control/src/lib.rs Normal file
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@@ -0,0 +1,2 @@
pub mod planner;
pub mod executor;

21
firmware/jerk_control/src/main.rs
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@@ -1,21 +0,0 @@
pub mod motion {
pub mod planner;
}
use motion::planner::{Planner, Config};
use crate::motion::planner::State;
fn main() {
let planner_config = Config {
j_max: 231.,
v_max: 0.0,
a_max: 100. , // WAG
step_size: 0.2
};
let planner = Planner::new(5_000, planner_config)
.expect("Planner config should succeed");
let profile = planner.plan_profile(planner.step_size() as i64 * 2500, State::default());
println!("Profile: {:#?}", profile);
}

46
firmware/jerk_control/src/motion/planner.rs → firmware/jerk_control/src/planner.rs
View File

@@ -35,14 +35,14 @@ pub struct Planner {
#[derive(Copy, Clone, Debug)]
pub struct Profile {
segments: [Segment; 7]
pub segments: [Segment; 8]
}
#[derive(Copy, Clone, Debug, Default)]
pub struct Segment {
// Used by executor
pub delta: [i32; 3],
start_time: u32, // 0 to disable; set after completion.
pub delta: [Wrapping<i32>; 3],
pub start_time: u32, // 0 to disable; set after completion.
// used by planner
v0: i32,
a0: i32,
@@ -52,7 +52,7 @@ pub struct Segment {
impl Segment {
// This will work for |t|<=65535
pub fn state_at_time_u64(&self, time: u32, step_size: u32) -> (i32, State) {
let j = self.delta[2] as i32; // 6, 0, or -6
let j = self.delta[2].0; // 6, 0, or -6
let t = time as i64;
let t2 = (time * time) as i64;
// TODO: figure out what can be handled as u32, as 64-bit arithmentic is significantly slower
@@ -87,15 +87,11 @@ pub struct State {
impl State {
fn segment_for(&self, j: i32) -> Segment {
let a0_2 = Wrapping((self.a0 / 2) as u32);
let a0 = Wrapping((self.a0) as u32);
let j_6 = Wrapping((j / 6) as u32);
let j_2 = Wrapping((j / 2) as u32);
Segment {
delta: [
((self.a0 / 2) + (j / 6) + self.v0),
self.a0 + j,
j,
Wrapping((self.a0 / 2) + (j / 6) + self.v0),
Wrapping(self.a0 + j),
Wrapping(j),
],
start_time: self.time,
v0: self.v0,
@@ -104,7 +100,10 @@ impl State {
}
}
fn produce_segment(&mut self, j: i32, length: u32, step_size: u32) -> Segment {
fn produce_segment(&mut self, j: i32, length: u32, step_size: u32) -> Option<Segment> {
if length == 0 {
return None;
}
let segment = self.segment_for(j);
let t = length as i32;
let t2 = t * length as i32;
@@ -119,7 +118,7 @@ impl State {
self.time += length as u32;
segment
Some(segment)
}
}
@@ -173,7 +172,7 @@ impl Planner {
// Compute ta_max and tj_max
self.tj_max = self.a_max / 6;
self.ta_max = self.v_max / self.a_max - self.tj_max;
self.ta_max = (self.v_max / self.a_max).checked_sub(self.tj_max).unwrap_or(0);
// Compute regime change points
let a_max_2 = self.a_max as u64 * self.a_max as u64;
@@ -213,8 +212,9 @@ impl Planner {
let tv = (dx - ramp_dx) * 2 / s4v as u64;
let tv = ((tv + 1) / 2) as u32;
eprintln!("ta={ta}, tj={tj}, tv={tv}");
let j_real = dir * 6;
let mut segments = [Segment::default(); 7];
let mut segments = [Segment::default(); 8];
let seg_params = [
(j_real, tj),
(0, ta),
@@ -224,9 +224,19 @@ impl Planner {
(0, ta),
(j_real, tj),
];
for (i, (j,t)) in seg_params.iter().copied().enumerate() {
segments[i] = cstate.produce_segment(j, t, self.step_size);
}
let step_size = self.step_size;
let mut imax = 0;
let seg_count =
seg_params.iter()
.copied()
.filter_map(|(j,t)| cstate.produce_segment(j, t, step_size))
.enumerate()
.map(|(i, segment)| segments[i] = segment)
.count();
segments[seg_count].start_time = tj * 4 + ta * 2 + tv;
Profile {
segments,
}