diff --git a/README.md b/README.md index 5e99d9e..6505205 100644 --- a/README.md +++ b/README.md @@ -255,21 +255,18 @@ Use the bare `report` command to obtain a single report. Enable continuous reporting with `report mode on`. Reports are JSON objects with the following keys. -| Key | Unit | Description | -| --- | :---: | --- | -| `channel` | Integer | Channel `0`, or `1` | -| `time` | Seconds | Temperature measurement time | -| `adc` | Volts | AD7172 input | -| `sens` | Ohms | Thermistor resistance derived from `adc` | -| `temperature` | Degrees Celsius | Steinhart-Hart conversion result derived from `sens` | -| `pid_engaged` | Boolean | `true` if in closed-loop mode | -| `i_set` | Amperes | TEC output current | -| `dac_value` | Volts | AD5680 output derived from `i_set` | -| `dac_feedback` | Volts | ADC measurement of the AD5680 output | -| `i_tec` | Volts | MAX1968 TEC current monitor | -| `tec_i` | Amperes | TEC output current feedback derived from `i_tec` | -| `tec_u_meas` | Volts | Measurement of the voltage across the TEC | -| `pid_output` | Amperes | PID control output | +| Key | Unit | Description | +| --- | :---: | --- | +| `channel` | Integer | Channel `0`, or `1` | +| `time` | Seconds | Report timestamp (since thermostat reset) | +| `interval` | Seconds | ADC Sampling Interval | +| `sens` | Ohms | Thermistor resistance | +| `temperature` | Degrees Celsius | Temperature derived from thermistor resistance | +| `pid_engaged` | Boolean | `true` if in closed-loop mode | +| `pid_output` | Amperes | PID control output | +| `i_set` | Amperes | Set TEC output current | +| `i_measured` | Amperes | Measured current passing through TEC | +| `v_measured` | Volts | Measured voltage across TEC | Note: With Thermostat v2 and below, the voltage and current readouts `i_tec` and `tec_i` are disabled and null due to faulty hardware that introduces a lot of noise in the signal. @@ -280,10 +277,10 @@ The thermostat implements a PID control loop for each of the TEC channels, more ## Fan control Fan control commands are available for thermostat revisions with an integrated fan system: -1. `fan` - show fan stats: `fan_pwm`, `abs_max_tec_i`, `auto_mode`, `k_a`, `k_b`, `k_c`. +1. `fan` - show fan stats: `fan_pwm`, `max_abs_i_measured`, `auto_mode`, `k_a`, `k_b`, `k_c`. 2. `fan auto` - enable auto speed controller mode, where fan speed is controlled by the fan curve `fcurve`. 3. `fan ` - set the fan power with the value from `1` to `100` and disable auto mode. There is no way to completely disable the fan. Please note that power doesn't correlate with the actual speed linearly. -4. `fcurve ` - set coefficients of the controlling curve `a*x^2 + b*x + c`, where `x` is `abs_max_tec_i/MAX_TEC_I`, a normalized value in range [0,1], +4. `fcurve ` - set coefficients of the controlling curve `a*x^2 + b*x + c`, where `x` is `max_abs_i_measured/MAX_I`, a normalized value in range [0,1], i.e. the (linear) proportion of current output capacity used, on the channel with the largest current flow. The controlling curve is also clamped to [0,1]. 5. `fcurve default` - restore fan curve coefficients to defaults: `a = 1.0, b = 0.0, c = 0.0`. diff --git a/src/channels.rs b/src/channels.rs index 172ad50..10ac2d6 100644 --- a/src/channels.rs +++ b/src/channels.rs @@ -4,7 +4,7 @@ use crate::{ channel_state::ChannelState, command_handler::JsonBuffer, command_parser::{CenterPoint, PwmPin}, - pins, steinhart_hart, hw_rev + hw_rev, pins, steinhart_hart, }; use core::cmp::max_by; use heapless::{consts::U2, Vec}; @@ -55,7 +55,14 @@ impl<'a> Channels<'a> { let channel1 = Channel::new(pins.channel1, adc_calibration1); let pins_adc = pins.pins_adc; let pwm = pins.pwm; - let mut channels = Channels { channel0, channel1, adc, pins_adc, pwm, hwrev }; + let mut channels = Channels { + channel0, + channel1, + adc, + pins_adc, + pwm, + hwrev, + }; for channel in 0..CHANNELS { channels.calibrate_dac_value(channel); channels.set_i(channel, ElectricCurrent::new::(0.0)); @@ -109,7 +116,7 @@ impl<'a> Channels<'a> { voltage } - pub fn get_i(&mut self, channel: usize) -> ElectricCurrent { + pub fn get_i_set(&mut self, channel: usize) -> ElectricCurrent { let center_point = self.get_center(channel); let r_sense = ElectricalResistance::new::(R_SENSE); let voltage = self.get_dac(channel); @@ -129,7 +136,7 @@ impl<'a> Channels<'a> { voltage } - pub fn set_i(&mut self, channel: usize, i_tec: ElectricCurrent) -> ElectricCurrent { + pub fn set_i(&mut self, channel: usize, i_set: ElectricCurrent) -> ElectricCurrent { let vref_meas = match channel { 0 => self.channel0.vref_meas, 1 => self.channel1.vref_meas, @@ -137,7 +144,7 @@ impl<'a> Channels<'a> { }; let center_point = vref_meas; let r_sense = ElectricalResistance::new::(R_SENSE); - let voltage = i_tec * 10.0 * r_sense + center_point; + let voltage = i_set * 10.0 * r_sense + center_point; let voltage = self.set_dac(channel, voltage); (voltage - center_point) / (10.0 * r_sense) } @@ -365,13 +372,13 @@ impl<'a> Channels<'a> { (duty * max, max) } - // Get current passing through TEC - pub fn get_tec_i(&mut self, channel: usize) -> ElectricCurrent { + // Measure current passing through TEC + pub fn get_i_measured(&mut self, channel: usize) -> ElectricCurrent { (self.read_itec(channel) - self.read_vref(channel)) / ElectricalResistance::new::(0.4) } - // Get voltage across TEC - pub fn get_tec_v(&mut self, channel: usize) -> ElectricPotential { + // Measure voltage across TEC + pub fn get_v_measured(&mut self, channel: usize) -> ElectricPotential { (self.read_tec_u_meas(channel) - ElectricPotential::new::(1.5)) * 4.0 } @@ -428,29 +435,24 @@ impl<'a> Channels<'a> { } fn report(&mut self, channel: usize) -> Report { - let i_set = self.get_i(channel); - let i_tec = if self.hwrev.major > 2 {Some(self.read_itec(channel))} else {None}; - let tec_i = if self.hwrev.major > 2 {Some(self.get_tec_i(channel))} else {None}; - let dac_value = self.get_dac(channel); let state = self.channel_state(channel); - let pid_output = ElectricCurrent::new::(state.pid.y1); Report { channel, time: state.get_adc_time(), interval: state.get_adc_interval(), - adc: state.get_adc(), sens: state.get_sens(), temperature: state .get_temperature() .map(|temperature| temperature.get::()), pid_engaged: state.pid_engaged, - i_set, - dac_value, - dac_feedback: self.read_dac_feedback(channel), - i_tec, - tec_i, - tec_u_meas: self.get_tec_v(channel), - pid_output, + pid_output: ElectricCurrent::new::(state.pid.y1), + i_set: self.get_i_set(channel), + i_measured: if self.hwrev.major > 2 { + Some(self.get_i_measured(channel)) + } else { + None + }, + v_measured: self.get_v_measured(channel), } } @@ -483,7 +485,7 @@ impl<'a> Channels<'a> { PwmSummary { channel, center: CenterPointJson(self.channel_state(channel).center.clone()), - i_set: (self.get_i(channel), ElectricCurrent::new::(3.0)).into(), + i_set: (self.get_i_set(channel), ElectricCurrent::new::(3.0)).into(), max_v: (self.get_max_v(channel), ElectricPotential::new::(5.0)).into(), max_i_pos: self.get_max_i_pos(channel).into(), max_i_neg: self.get_max_i_neg(channel).into(), @@ -530,10 +532,10 @@ impl<'a> Channels<'a> { serde_json_core::to_vec(&summaries) } - pub fn current_abs_max_tec_i(&mut self) -> ElectricCurrent { + pub fn max_abs_i_measured(&mut self) -> ElectricCurrent { max_by( - self.get_tec_i(0).abs(), - self.get_tec_i(1).abs(), + self.get_i_measured(0).abs(), + self.get_i_measured(1).abs(), |a, b| a.partial_cmp(b).unwrap_or(core::cmp::Ordering::Equal), ) } @@ -544,17 +546,13 @@ pub struct Report { channel: usize, time: Time, interval: Time, - adc: Option, sens: Option, temperature: Option, pid_engaged: bool, - i_set: ElectricCurrent, - dac_value: ElectricPotential, - dac_feedback: ElectricPotential, - i_tec: Option, - tec_i: Option, - tec_u_meas: ElectricPotential, pid_output: ElectricCurrent, + i_set: ElectricCurrent, + i_measured: Option, + v_measured: ElectricPotential, } pub struct CenterPointJson(CenterPoint); diff --git a/src/command_handler.rs b/src/command_handler.rs index e5032e0..0ad24ac 100644 --- a/src/command_handler.rs +++ b/src/command_handler.rs @@ -207,7 +207,7 @@ impl Handler { channel: usize, center: CenterPoint, ) -> Result { - let i_tec = channels.get_i(channel); + let i_tec = channels.get_i_set(channel); let state = channels.channel_state(channel); state.center = center; if !state.pid_engaged { diff --git a/src/fan_ctrl.rs b/src/fan_ctrl.rs index 7d50080..7ab6f54 100644 --- a/src/fan_ctrl.rs +++ b/src/fan_ctrl.rs @@ -1,19 +1,16 @@ +use crate::{command_handler::JsonBuffer, hw_rev::HWSettings}; use num_traits::Float; use serde::Serialize; use stm32f4xx_hal::{ pac::TIM8, pwm::{self, PwmChannels}, }; -use uom::si::{ - f64::ElectricCurrent, - electric_current::ampere, -}; -use crate::{command_handler::JsonBuffer, hw_rev::HWSettings}; +use uom::si::{electric_current::ampere, f64::ElectricCurrent}; pub type FanPin = PwmChannels; // as stated in the schematics -const MAX_TEC_I: f32 = 3.0; +const MAX_I: f32 = 3.0; const MAX_USER_FAN_PWM: f32 = 100.0; const MIN_USER_FAN_PWM: f32 = 1.0; @@ -25,7 +22,7 @@ pub struct FanCtrl { k_a: f32, k_b: f32, k_c: f32, - abs_max_tec_i: f32, + max_abs_i_measured: f32, hw_settings: HWSettings, } @@ -40,7 +37,7 @@ impl FanCtrl { k_a: hw_settings.fan_k_a, k_b: hw_settings.fan_k_b, k_c: hw_settings.fan_k_c, - abs_max_tec_i: 0f32, + max_abs_i_measured: 0f32, hw_settings, }; if fan_ctrl.fan_auto { @@ -49,10 +46,10 @@ impl FanCtrl { fan_ctrl } - pub fn cycle(&mut self, abs_max_tec_i: ElectricCurrent) { - self.abs_max_tec_i = abs_max_tec_i.get::() as f32; + pub fn cycle(&mut self, max_abs_i_measured: ElectricCurrent) { + self.max_abs_i_measured = max_abs_i_measured.get::() as f32; if self.fan_auto && self.hw_settings.fan_available { - let scaled_current = self.abs_max_tec_i / MAX_TEC_I; + let scaled_current = self.max_abs_i_measured / MAX_I; // do not limit upper bound, as it will be limited in the set_pwm() let pwm = (MAX_USER_FAN_PWM * (scaled_current * (scaled_current * self.k_a + self.k_b) + self.k_c)) @@ -65,7 +62,7 @@ impl FanCtrl { if self.hw_settings.fan_available { let summary = FanSummary { fan_pwm: self.get_pwm(), - abs_max_tec_i: self.abs_max_tec_i, + max_abs_i_measured: self.max_abs_i_measured, auto_mode: self.fan_auto, k_a: self.k_a, k_b: self.k_b, @@ -160,7 +157,7 @@ fn scale_number(unscaled: f32, to_min: f32, to_max: f32, from_min: f32, from_max #[derive(Serialize)] pub struct FanSummary { fan_pwm: u32, - abs_max_tec_i: f32, + max_abs_i_measured: f32, auto_mode: bool, k_a: f32, k_b: f32, diff --git a/src/main.rs b/src/main.rs index e6d0acd..29e4def 100644 --- a/src/main.rs +++ b/src/main.rs @@ -196,7 +196,7 @@ fn main() -> ! { server.for_each(|_, session| session.set_report_pending(channel.into())); } - fan_ctrl.cycle(channels.current_abs_max_tec_i()); + fan_ctrl.cycle(channels.max_abs_i_measured()); if channels.pid_engaged() { leds.g3.on();