forked from M-Labs/thermostat
40 lines
1.1 KiB
Rust
40 lines
1.1 KiB
Rust
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use smoltcp::time::Instant;
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use crate::{ad5680, ad7172, pid, steinhart_hart as sh};
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pub struct ChannelState {
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pub adc_data: Option<i32>,
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pub adc_time: Instant,
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pub dac_value: u32,
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pub pid_enabled: bool,
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pub pid: pid::Controller,
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pub sh: sh::Parameters,
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}
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impl Default for ChannelState {
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fn default() -> Self {
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ChannelState {
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adc_data: None,
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adc_time: Instant::from_secs(0),
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dac_value: 0,
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pid_enabled: false,
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pid: pid::Controller::new(pid::Parameters::default()),
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sh: sh::Parameters::default(),
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}
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}
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}
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impl ChannelState {
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/// Update PID state on ADC input, calculate new DAC output
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pub fn update_adc(&mut self, now: Instant, adc_data: i32) {
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self.adc_data = Some(adc_data);
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self.adc_time = now;
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// Update PID controller
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let input = (adc_data as f64) / (ad7172::MAX_VALUE as f64);
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let temperature = self.sh.get_temperature(input);
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let output = self.pid.update(temperature);
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self.dac_value = (output * (ad5680::MAX_VALUE as f64)) as u32;
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}
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}
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