96 lines
2.9 KiB
Rust
96 lines
2.9 KiB
Rust
use board;
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pub struct Electrometer {
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range: board::ElectrometerRange,
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out_of_range_count: u8,
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ignore_count: u8,
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ic_buffer: f32,
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ic_buffer_count: usize,
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last_ic: Option<f32>
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}
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#[derive(Clone, Copy)]
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pub struct ElectrometerStatus {
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pub ic: Option<f32>
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}
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impl Electrometer {
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pub const fn new() -> Electrometer {
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Electrometer {
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range: board::ElectrometerRange::Med,
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out_of_range_count: 0,
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ignore_count: 0,
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ic_buffer: 0.0,
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ic_buffer_count: 0,
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last_ic: None
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}
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}
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pub fn adc_input(&mut self, ic_sample: u16) {
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if self.ignore_count > 0 {
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self.ignore_count -= 1;
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} else {
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let mut new_range = if ic_sample > 3100 {
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match self.range {
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board::ElectrometerRange::Low => Some(board::ElectrometerRange::Med),
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board::ElectrometerRange::Med => Some(board::ElectrometerRange::High),
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board::ElectrometerRange::High => None
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}
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} else if ic_sample < 105 {
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match self.range {
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board::ElectrometerRange::Low => None,
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board::ElectrometerRange::Med => Some(board::ElectrometerRange::Low),
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board::ElectrometerRange::High => Some(board::ElectrometerRange::Med)
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}
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} else {
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None
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};
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if new_range.is_some() {
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self.out_of_range_count += 1;
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if self.out_of_range_count < 75 {
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new_range = None;
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}
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} else {
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self.out_of_range_count = 0;
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}
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if new_range.is_some() {
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self.ignore_count = 150;
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self.ic_buffer = 0.0;
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self.ic_buffer_count = 0;
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self.last_ic = None;
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self.range = new_range.unwrap();
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board::set_electrometer_range(self.range);
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} else {
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let gain = match self.range {
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board::ElectrometerRange::Low => board::IC_ADC_GAIN_LOW,
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board::ElectrometerRange::Med => board::IC_ADC_GAIN_MED,
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board::ElectrometerRange::High => board::IC_ADC_GAIN_HIGH
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};
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self.ic_buffer += ((ic_sample as f32) - board::IC_ADC_OFFSET)/gain;
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self.ic_buffer_count += 1;
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if self.ic_buffer_count == 512 {
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self.last_ic = Some(self.ic_buffer/512.0);
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self.ic_buffer = 0.0;
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self.ic_buffer_count = 0;
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}
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}
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}
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}
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pub fn get_status(&self) -> ElectrometerStatus {
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ElectrometerStatus {
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ic: self.last_ic
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}
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}
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}
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impl ElectrometerStatus {
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pub fn debug_print(&self) {
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if self.ic.is_some() {
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println!("ion: {}nA", 1e9*self.ic.unwrap());
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}
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}
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}
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