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refactor position min/max, update duty min/max when near the middle

master
Sebastien Bourdeauducq 2019-11-15 18:10:25 +08:00
parent 98e0916699
commit 45988871c4
1 changed files with 79 additions and 46 deletions
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125
src/wavemeter.rs
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@ -47,50 +47,76 @@ fn read_config_from_file<P: AsRef<Path>>(path: P) -> Result<Config, Box<dyn Erro
Ok(u) Ok(u)
} }
fn do_calibrate(config: &Config) { struct MinMaxMonitor {
let mut sample_count = 0; cycle_sample_count: u32,
let avg_ref = (config.ref_min + config.ref_max)/2.0; current_sample_count: u32,
let max_sample_count = (avg_ref*config.position_mon_time) as u32; current_position_min: i64,
let mut position_min = i64::max_value(); current_position_max: i64,
let mut position_max = i64::min_value(); }
impl MinMaxMonitor {
pub fn new(cycle_sample_count: u32) -> MinMaxMonitor {
MinMaxMonitor {
cycle_sample_count: cycle_sample_count,
current_sample_count: 0,
current_position_min: i64::max_value(),
current_position_max: i64::min_value(),
/*position_min: i64::max_value(),
position_max: i64::min_value(),
// Trick: position > position_middle is always false before the first monitor cycle.
position_middle: i64::max_value(),*/
}
}
pub fn reset(&mut self) {
self.current_sample_count = 0;
self.current_position_min = i64::max_value();
self.current_position_max = i64::min_value();
}
pub fn input(&mut self, position: i64, mut callback: impl FnMut(i64, i64)) {
if position > self.current_position_max {
self.current_position_max = position;
}
if position < self.current_position_min {
self.current_position_min = position;
}
self.current_sample_count += 1;
if self.current_sample_count == self.cycle_sample_count {
callback(self.current_position_min, self.current_position_max);
self.reset();
}
}
}
fn do_calibrate(config: &Config) {
let mut refpll = noptica::Dpll::new( let mut refpll = noptica::Dpll::new(
noptica::Dpll::frequency_to_ftw(config.ref_min, config.sample_rate), noptica::Dpll::frequency_to_ftw(config.ref_min, config.sample_rate),
noptica::Dpll::frequency_to_ftw(config.ref_max, config.sample_rate), noptica::Dpll::frequency_to_ftw(config.ref_max, config.sample_rate),
config.refpll_ki, config.refpll_ki,
config.refpll_kp); config.refpll_kp);
let mut position_tracker = noptica::PositionTracker::new(); let mut position_tracker = noptica::PositionTracker::new();
let mut min_max_monitor = MinMaxMonitor::new(
((config.ref_min + config.ref_max)/2.0*config.position_mon_time) as u32);
noptica::sample(&config.sample_command, |rising, _falling| { noptica::sample(&config.sample_command, |rising, _falling| {
refpll.tick(rising & (1 << config.bit_ref) != 0); refpll.tick(rising & (1 << config.bit_ref) != 0);
if refpll.locked() { if refpll.locked() {
if rising & (1 << config.bit_meas) != 0 { if rising & (1 << config.bit_meas) != 0 {
let position = position_tracker.edge(refpll.get_phase_unwrapped()); let position = position_tracker.edge(refpll.get_phase_unwrapped());
if position > position_max { min_max_monitor.input(position, |min, max| {
position_max = position; let displacement = ((max - min) as f64)/(noptica::Dpll::TURN as f64)*config.ref_wavelength;
} println!("{:.1} um", 1.0e6*displacement);
if position < position_min { });
position_min = position;
}
sample_count += 1;
if sample_count == max_sample_count {
let displacement = ((position_max-position_min) as f64)/(noptica::Dpll::TURN as f64)*config.ref_wavelength;
println!("{} um", 1.0e6*displacement);
sample_count = 0;
position_min = i64::max_value();
position_max = i64::min_value();
}
} }
} else { } else {
sample_count = 0; min_max_monitor.reset();
position_min = i64::max_value();
position_max = i64::min_value();
} }
}) })
} }
pub struct MotionTracker { struct MotionTracker {
last_position: i64, last_position: i64,
last_position_ago: u32, last_position_ago: u32,
speed: i64 speed: i64
@ -127,12 +153,17 @@ fn do_wavemeter(config: &Config) {
config.refpll_kp); config.refpll_kp);
let mut position_tracker = noptica::PositionTracker::new(); let mut position_tracker = noptica::PositionTracker::new();
let mut motion_tracker = MotionTracker::new(); let mut motion_tracker = MotionTracker::new();
let mut min_max_monitor = MinMaxMonitor::new(
((config.ref_min + config.ref_max)/2.0*config.position_mon_time) as u32);
// Update duty_min and duty_max when the position is near the middle
// to avoid glitches.
let mut prev_position_above_middle = false;
// Trick: position > position_middle is always false before the first monitor cycle.
let mut position_middle = i64::max_value();
let mut new_duty_min = i64::max_value();
let mut new_duty_max = i64::min_value();
let mut position_min = i64::max_value();
let mut position_max = i64::min_value();
let avg_ref = (config.ref_min + config.ref_max)/2.0;
let max_position_sample_count = (avg_ref*config.position_mon_time) as u32;
let mut position_sample_count = 0;
let mut duty_min = i64::max_value(); let mut duty_min = i64::max_value();
let mut duty_max = i64::min_value(); let mut duty_max = i64::min_value();
let mut prev_in_duty = false; let mut prev_in_duty = false;
@ -146,25 +177,25 @@ fn do_wavemeter(config: &Config) {
let position_opt; let position_opt;
if rising & (1 << config.bit_meas) != 0 { if rising & (1 << config.bit_meas) != 0 {
let position = position_tracker.edge(refpll.get_phase_unwrapped()); let position = position_tracker.edge(refpll.get_phase_unwrapped());
if position > position_max { min_max_monitor.input(position, |position_min, position_max| {
position_max = position;
}
if position < position_min {
position_min = position;
}
position_sample_count += 1;
if position_sample_count == max_position_sample_count {
let amplitude = position_max - position_min; let amplitude = position_max - position_min;
let off_duty = ((amplitude as f64)*(1.0 - config.duty_cycle)) as i64; let off_duty = ((amplitude as f64)*(1.0 - config.duty_cycle)) as i64;
duty_min = position_min + off_duty/2; new_duty_min = position_min + off_duty/2;
duty_max = position_max - off_duty/2; new_duty_max = position_max - off_duty/2;
position_sample_count = 0; position_middle = (position_max + position_min)/2;
});
let position_above_middle = position > position_middle;
if !position_above_middle && prev_position_above_middle {
duty_min = new_duty_min;
duty_max = new_duty_max;
} }
prev_position_above_middle = position_above_middle;
position_opt = Some(position); position_opt = Some(position);
} else { } else {
position_opt = None position_opt = None
}; };
motion_tracker.tick(position_opt); motion_tracker.tick(position_opt);
if rising & (1 << config.bit_input) != 0 { if rising & (1 << config.bit_input) != 0 {
let fringe_position = motion_tracker.extrapolated_position(); let fringe_position = motion_tracker.extrapolated_position();
let in_duty = (duty_min < fringe_position) && (fringe_position < duty_max); let in_duty = (duty_min < fringe_position) && (fringe_position < duty_max);
@ -174,12 +205,10 @@ fn do_wavemeter(config: &Config) {
} }
if !in_duty & prev_in_duty { if !in_duty & prev_in_duty {
let wavelength = (fringe_position - first_fringe).abs()/fringe_count; let wavelength = (fringe_position - first_fringe).abs()/fringe_count;
let max_displacement = ((position_max-position_min) as f64)/(noptica::Dpll::TURN as f64)*config.ref_wavelength;
let displacement = ((fringe_position - first_fringe).abs() as f64)/(noptica::Dpll::TURN as f64)*config.ref_wavelength; let displacement = ((fringe_position - first_fringe).abs() as f64)/(noptica::Dpll::TURN as f64)*config.ref_wavelength;
println!("{:.4} {} {:.2} {} {:.1}", println!("{:.4} {} {} {:.1}",
(wavelength as f64)/(noptica::Dpll::TURN as f64)*1.0e9*config.ref_wavelength, (wavelength as f64)/(noptica::Dpll::TURN as f64)*1.0e9*config.ref_wavelength,
fringe_count, fringe_count,
1.0e6*max_displacement,
if fringe_position > first_fringe { "UP " } else { "DOWN" }, if fringe_position > first_fringe { "UP " } else { "DOWN" },
1.0e9*displacement); 1.0e9*displacement);
fringe_count = 0; fringe_count = 0;
@ -188,9 +217,13 @@ fn do_wavemeter(config: &Config) {
prev_in_duty = in_duty; prev_in_duty = in_duty;
} }
} else { } else {
position_min = i64::max_value(); min_max_monitor.reset();
position_max = i64::min_value();
position_sample_count = 0; prev_position_above_middle = false;
position_middle = i64::max_value();
new_duty_min = i64::max_value();
new_duty_max = i64::min_value();
duty_min = i64::max_value(); duty_min = i64::max_value();
duty_max = i64::min_value(); duty_max = i64::min_value();
prev_in_duty = false; prev_in_duty = false;