57 lines
1.5 KiB
Rust
57 lines
1.5 KiB
Rust
use board;
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pub struct Electrometer {
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range: board::ElectrometerRange,
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ic_buffer: [f32; 64],
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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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ic_buffer: [0.0; 64],
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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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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[self.ic_buffer_count] = ((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 == self.ic_buffer.len() {
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let mut ic_avg: f32 = 0.0;
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for ic in self.ic_buffer.iter() {
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ic_avg += *ic;
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}
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self.last_ic = Some(ic_avg/(self.ic_buffer.len() as f32));
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self.ic_buffer_count = 0;
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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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