M-Labs/thermostat
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channels: add methods to retrieve actual voltage and current of TEC

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This commit is contained in:
topquark12 2021-01-08 16:18:20 +08:00
parent 3ba2cc9ddc
commit 3067b356c5
1 changed files with 12 additions and 2 deletions
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14
src/channels.rs
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@ -364,6 +364,16 @@ impl Channels {
(duty * max, max)
}
// Get actual current passing through TEC
pub fn get_tec_i(&mut self, channel: usize) -> ElectricCurrent {
(self.read_itec(channel) - self.read_vref(channel)) / ElectricalResistance::new::<ohm>(0.4)
}
// Get actual voltage across TEC
pub fn get_tec_v(&mut self, channel: usize) -> ElectricPotential {
(self.read_tec_u_meas(channel) - ElectricPotential::new::<volt>(1.5)) * 4.0
}
fn set_pwm(&mut self, channel: usize, pin: PwmPin, duty: f64) -> f64 {
fn set<P: hal::PwmPin<Duty=u16>>(pin: &mut P, duty: f64) -> f64 {
let max = pin.get_max_duty();
@ -417,7 +427,7 @@ impl Channels {
let vref = self.channel_state(channel).vref;
let (i_set, _) = self.get_i(channel);
let i_tec = self.read_itec(channel);
let tec_i = (i_tec - vref) / ElectricalResistance::new::<ohm>(0.4);
let tec_i = self.get_tec_i(channel);
let (dac_value, _) = self.get_dac(channel);
let state = self.channel_state(channel);
let pid_output = state.pid.last_output.map(|last_output|
@ -438,7 +448,7 @@ impl Channels {
dac_feedback: self.read_dac_feedback(channel),
i_tec,
tec_i,
tec_u_meas: (self.read_tec_u_meas(channel) - ElectricPotential::new::<volt>(1.5)) * 4.0,
tec_u_meas: self.get_tec_v(channel),
pid_output,
}
}