Add command for setting TEC polarity direction #135
73
README.md
73
README.md
@ -92,40 +92,43 @@ ADC input data is provided in reports. Query for the latest report with the comm
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Send commands as simple text string terminated by `\n`. Responses are
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formatted as line-delimited JSON.
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| Syntax | Function |
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|----------------------------------|-------------------------------------------------------------------------------|
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| `report` | Show current input |
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| `pwm` | Show current PWM settings |
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| `pwm <0/1> max_i_pos <amp>` | Set maximum positive output current |
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| `pwm <0/1> max_i_neg <amp>` | Set maximum negative output current |
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| `pwm <0/1> max_v <volt>` | Set maximum output voltage |
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| `pwm <0/1> i_set <amp>` | Disengage PID, set fixed output current |
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| `pwm <0/1> pid` | Let output current to be controlled by the PID |
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| `center <0/1> <volt>` | Set the MAX1968 0A-centerpoint to the specified fixed voltage |
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| `center <0/1> vref` | Set the MAX1968 0A-centerpoint to measure from VREF |
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| `pid` | Show PID configuration |
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| `pid <0/1> target <deg_celsius>` | Set the PID controller target temperature |
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| `pid <0/1> kp <value>` | Set proportional gain |
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| `pid <0/1> ki <value>` | Set integral gain |
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| `pid <0/1> kd <value>` | Set differential gain |
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| `pid <0/1> output_min <amp>` | Set mininum output |
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| `pid <0/1> output_max <amp>` | Set maximum output |
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| `s-h` | Show Steinhart-Hart equation parameters |
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| `s-h <0/1> <t0/b/r0> <value>` | Set Steinhart-Hart parameter for a channel |
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| `postfilter` | Show postfilter settings |
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| `postfilter <0/1> off` | Disable postfilter |
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| `postfilter <0/1> rate <rate>` | Set postfilter output data rate |
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| `load [0/1]` | Restore configuration for channel all/0/1 from flash |
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| `save [0/1]` | Save configuration for channel all/0/1 to flash |
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| `reset` | Reset the device |
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| `dfu` | Reset device and enters USB device firmware update (DFU) mode |
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| `ipv4 <X.X.X.X/L> [Y.Y.Y.Y]` | Configure IPv4 address, netmask length, and optional default gateway |
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| `fan` | Show current fan settings and sensors' measurements |
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| `fan <value>` | Set fan power with values from 1 to 100 |
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| `fan auto` | Enable automatic fan speed control |
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| `fcurve <a> <b> <c>` | Set fan controller curve coefficients (see *Fan control* section) |
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| `fcurve default` | Set fan controller curve coefficients to defaults (see *Fan control* section) |
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| `hwrev` | Show hardware revision, and settings related to it |
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| Syntax | Function |
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|------------------------------------------- |-------------------------------------------------------------------------------|
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| `report` | Show current input |
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| `report mode` | Show current report mode |
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| `report mode <off/on>` | Set report mode |
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| `pwm` | Show current PWM settings |
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| `pwm <0/1> max_i_pos <amp>` | Set maximum positive output current |
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| `pwm <0/1> max_i_neg <amp>` | Set maximum negative output current |
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| `pwm <0/1> max_v <volt>` | Set maximum output voltage |
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| `pwm <0/1> i_set <amp>` | Disengage PID, set fixed output current |
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| `pwm <0/1> polarity <normal/reversed>` | Set output current polarity, with 'normal' being the front panel polarity |
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| `pwm <0/1> pid` | Let output current to be controlled by the PID |
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| `center <0/1> <volt>` | Set the MAX1968 0A-centerpoint to the specified fixed voltage |
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| `center <0/1> vref` | Set the MAX1968 0A-centerpoint to measure from VREF |
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| `pid` | Show PID configuration |
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| `pid <0/1> target <deg_celsius>` | Set the PID controller target temperature |
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| `pid <0/1> kp <value>` | Set proportional gain |
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| `pid <0/1> ki <value>` | Set integral gain |
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| `pid <0/1> kd <value>` | Set differential gain |
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| `pid <0/1> output_min <amp>` | Set mininum output |
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| `pid <0/1> output_max <amp>` | Set maximum output |
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| `s-h` | Show Steinhart-Hart equation parameters |
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| `s-h <0/1> <t0/b/r0> <value>` | Set Steinhart-Hart parameter for a channel |
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| `postfilter` | Show postfilter settings |
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| `postfilter <0/1> off` | Disable postfilter |
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| `postfilter <0/1> rate <rate>` | Set postfilter output data rate |
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| `load [0/1]` | Restore configuration for channel all/0/1 from flash |
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| `save [0/1]` | Save configuration for channel all/0/1 to flash |
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| `reset` | Reset the device |
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| `dfu` | Reset device and enters USB device firmware update (DFU) mode |
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| `ipv4 <X.X.X.X/L> [Y.Y.Y.Y]` | Configure IPv4 address, netmask length, and optional default gateway |
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| `fan` | Show current fan settings and sensors' measurements |
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| `fan <value>` | Set fan power with values from 1 to 100 |
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| `fan auto` | Enable automatic fan speed control |
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| `fcurve <a> <b> <c>` | Set fan controller curve coefficients (see *Fan control* section) |
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| `fcurve default` | Set fan controller curve coefficients to defaults (see *Fan control* section) |
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| `hwrev` | Show hardware revision, and settings related to it |
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## USB
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@ -182,6 +185,8 @@ postfilter rate can be tuned with the `postfilter` command.
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When using a TEC module with the Thermostat, the Thermostat expects the thermal load (where the thermistor is located) to cool down with a positive software current set point, and heat up with a negative current set point.
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If the Thermostat is used for temperature control with the Sinara 5432 DAC "Zotino", and is connected via an IDC cable, the TEC polarity may need to be reversed with the `pwm <ch> polarity reversed` TCP command.
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Testing heat flow direction with a low set current is recommended before installation of the TEC module.
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### Limits
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@ -17,7 +17,7 @@ use crate::{
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ad7172,
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pid,
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steinhart_hart as sh,
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command_parser::CenterPoint,
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command_parser::{CenterPoint, Polarity},
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};
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const R_INNER: f64 = 2.0 * 5100.0;
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@ -35,6 +35,7 @@ pub struct ChannelState {
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pub pid_engaged: bool,
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pub pid: pid::Controller,
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pub sh: sh::Parameters,
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pub polarity: Polarity,
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}
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impl ChannelState {
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@ -51,6 +52,7 @@ impl ChannelState {
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pid_engaged: false,
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pid: pid::Controller::new(pid::Parameters::default()),
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sh: sh::Parameters::default(),
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polarity: Polarity::Normal,
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}
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}
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@ -17,7 +17,7 @@ use crate::{
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ad7172,
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channel::{Channel, Channel0, Channel1},
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channel_state::ChannelState,
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command_parser::{CenterPoint, PwmPin},
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command_parser::{CenterPoint, PwmPin, Polarity},
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command_handler::JsonBuffer,
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pins::{self, Channel0VRef, Channel1VRef},
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steinhart_hart,
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@ -158,6 +158,11 @@ impl Channels {
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pub fn set_i(&mut self, channel: usize, i_set: ElectricCurrent) -> ElectricCurrent {
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let i_set = i_set.min(MAX_TEC_I).max(-MAX_TEC_I);
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self.channel_state(channel).i_set = i_set;
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let negate = match self.channel_state(channel).polarity {
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Polarity::Normal => 1.0,
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Polarity::Reversed => -1.0,
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};
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let vref_meas = match channel.into() {
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0 => self.channel0.vref_meas,
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1 => self.channel1.vref_meas,
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@ -165,10 +170,9 @@ impl Channels {
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};
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let center_point = vref_meas;
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let r_sense = ElectricalResistance::new::<ohm>(R_SENSE);
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let voltage = i_set * 10.0 * r_sense + center_point;
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let voltage = negate * i_set * 10.0 * r_sense + center_point;
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let voltage = self.set_dac(channel, voltage);
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let i_set = (voltage - center_point) / (10.0 * r_sense);
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self.channel_state(channel).i_set = i_set;
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let i_set = negate * (voltage - center_point) / (10.0 * r_sense);
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i_set
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}
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@ -386,18 +390,28 @@ impl Channels {
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}
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pub fn get_max_i_pos(&mut self, channel: usize) -> (ElectricCurrent, ElectricCurrent) {
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let duty = self.get_pwm(channel, PwmPin::MaxIPos);
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let duty = match self.channel_state(channel).polarity {
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Polarity::Normal => self.get_pwm(channel, PwmPin::MaxIPos),
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Polarity::Reversed => self.get_pwm(channel, PwmPin::MaxINeg),
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};
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(duty * MAX_TEC_I_DUTY_TO_CURRENT_RATE, MAX_TEC_I)
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}
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pub fn get_max_i_neg(&mut self, channel: usize) -> (ElectricCurrent, ElectricCurrent) {
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let duty = self.get_pwm(channel, PwmPin::MaxINeg);
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let duty = match self.channel_state(channel).polarity {
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Polarity::Normal => self.get_pwm(channel, PwmPin::MaxINeg),
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Polarity::Reversed => self.get_pwm(channel, PwmPin::MaxIPos),
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};
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(duty * MAX_TEC_I_DUTY_TO_CURRENT_RATE, MAX_TEC_I)
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}
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// Get current passing through TEC
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pub fn get_tec_i(&mut self, channel: usize) -> ElectricCurrent {
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(self.adc_read(channel, PinsAdcReadTarget::ITec, 16) - self.adc_read(channel, PinsAdcReadTarget::VREF, 16)) / ElectricalResistance::new::<ohm>(0.4)
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let tec_i = (self.adc_read(channel, PinsAdcReadTarget::ITec, 16) - self.adc_read(channel, PinsAdcReadTarget::VREF, 16)) / ElectricalResistance::new::<ohm>(0.4);
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match self.channel_state(channel).polarity {
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Polarity::Normal => tec_i,
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Polarity::Reversed => -tec_i,
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}
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}
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// Get voltage across TEC
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@ -442,17 +456,36 @@ impl Channels {
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pub fn set_max_i_pos(&mut self, channel: usize, max_i_pos: ElectricCurrent) -> (ElectricCurrent, ElectricCurrent) {
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let max = ElectricCurrent::new::<ampere>(3.0);
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let duty = (max_i_pos.min(MAX_TEC_I).max(ElectricCurrent::zero()) / MAX_TEC_I_DUTY_TO_CURRENT_RATE).get::<ratio>();
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let duty = self.set_pwm(channel, PwmPin::MaxIPos, duty);
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let duty = match self.channel_state(channel).polarity {
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Polarity::Normal => self.set_pwm(channel, PwmPin::MaxIPos, duty),
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Polarity::Reversed => self.set_pwm(channel, PwmPin::MaxINeg, duty),
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};
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(duty * MAX_TEC_I_DUTY_TO_CURRENT_RATE, max)
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}
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pub fn set_max_i_neg(&mut self, channel: usize, max_i_neg: ElectricCurrent) -> (ElectricCurrent, ElectricCurrent) {
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let max = ElectricCurrent::new::<ampere>(3.0);
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let duty = (max_i_neg.min(MAX_TEC_I).max(ElectricCurrent::zero()) / MAX_TEC_I_DUTY_TO_CURRENT_RATE).get::<ratio>();
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let duty = self.set_pwm(channel, PwmPin::MaxINeg, duty);
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let duty = match self.channel_state(channel).polarity {
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Polarity::Normal => self.set_pwm(channel, PwmPin::MaxINeg, duty),
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Polarity::Reversed => self.set_pwm(channel, PwmPin::MaxIPos, duty),
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};
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(duty * MAX_TEC_I_DUTY_TO_CURRENT_RATE, max)
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}
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pub fn set_polarity(&mut self, channel: usize, polarity: Polarity) {
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if self.channel_state(channel).polarity != polarity {
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let i_set = self.channel_state(channel).i_set;
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let max_i_pos = self.get_max_i_pos(channel).0;
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let max_i_neg = self.get_max_i_neg(channel).0;
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self.channel_state(channel).polarity = polarity;
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self.set_i(channel, i_set);
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self.set_max_i_pos(channel, max_i_pos);
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self.set_max_i_neg(channel, max_i_neg);
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}
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}
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fn report(&mut self, channel: usize) -> Report {
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let i_set = self.get_i(channel);
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let i_tec = self.adc_read(channel, PinsAdcReadTarget::ITec, 16);
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@ -11,7 +11,8 @@ use super::{
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CenterPoint,
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PidParameter,
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PwmPin,
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ShParameter
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ShParameter,
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Polarity
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},
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ad7172,
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CHANNEL_CONFIG_KEY,
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@ -170,6 +171,12 @@ impl Handler {
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Ok(Handler::Handled)
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}
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fn set_polarity(socket: &mut TcpSocket, channels: &mut Channels, channel: usize, polarity: Polarity) -> Result<Handler, Error> {
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channels.set_polarity(channel, polarity);
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send_line(socket, b"{}");
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Ok(Handler::Handled)
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}
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fn set_pwm (socket: &mut TcpSocket, channels: &mut Channels, channel: usize, pin: PwmPin, value: f64) -> Result<Handler, Error> {
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match pin {
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PwmPin::ISet => {
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@ -411,6 +418,7 @@ impl Handler {
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Command::Show(ShowCommand::PostFilter) => Handler::show_post_filter(socket, channels),
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Command::Show(ShowCommand::Ipv4) => Handler::show_ipv4(socket, ipv4_config),
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Command::PwmPid { channel } => Handler::engage_pid(socket, channels, channel),
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Command::PwmPolarity { channel, polarity } => Handler::set_polarity(socket, channels, channel, polarity),
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Command::Pwm { channel, pin, value } => Handler::set_pwm(socket, channels, channel, pin, value),
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Command::CenterPoint { channel, center } => Handler::set_center_point(socket, channels, channel, center),
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Command::Pid { channel, parameter, value } => Handler::set_pid(socket, channels, channel, parameter, value),
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@ -135,6 +135,12 @@ pub enum CenterPoint {
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Override(f32),
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}
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#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
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pub enum Polarity {
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Normal,
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Reversed,
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}
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#[derive(Debug, Clone, PartialEq)]
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pub enum Command {
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Quit,
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@ -157,6 +163,10 @@ pub enum Command {
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PwmPid {
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channel: usize,
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},
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PwmPolarity {
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channel: usize,
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polarity: Polarity,
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},
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CenterPoint {
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channel: usize,
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center: CenterPoint,
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@ -297,6 +307,18 @@ fn pwm_pid(input: &[u8]) -> IResult<&[u8], ()> {
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value((), tag("pid"))(input)
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}
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fn pwm_polarity(input: &[u8]) -> IResult<&[u8], Polarity> {
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preceded(
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tag("polarity"),
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preceded(
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whitespace,
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alt((value(Polarity::Normal, tag("normal")),
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value(Polarity::Reversed, tag("reversed"))
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))
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)
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)(input)
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}
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fn pwm(input: &[u8]) -> IResult<&[u8], Result<Command, Error>> {
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let (input, _) = tag("pwm")(input)?;
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alt((
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@ -309,6 +331,10 @@ fn pwm(input: &[u8]) -> IResult<&[u8], Result<Command, Error>> {
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let (input, ()) = pwm_pid(input)?;
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Ok((input, Ok(Command::PwmPid { channel })))
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},
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|input| {
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let (input, polarity) = pwm_polarity(input)?;
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Ok((input, Ok(Command::PwmPolarity { channel, polarity })))
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},
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|input| {
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let (input, config) = pwm_setup(input)?;
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match config {
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@ -8,7 +8,7 @@ use uom::si::{
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use crate::{
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ad7172::PostFilter,
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channels::Channels,
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command_parser::CenterPoint,
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command_parser::{CenterPoint, Polarity},
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pid,
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steinhart_hart,
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};
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@ -20,6 +20,7 @@ pub struct ChannelConfig {
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pid_target: f32,
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pid_engaged: bool,
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i_set: ElectricCurrent,
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polarity: Polarity,
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sh: steinhart_hart::Parameters,
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pwm: PwmLimits,
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/// uses variant `PostFilter::Invalid` instead of `None` to save space
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@ -45,7 +46,8 @@ impl ChannelConfig {
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pid: state.pid.parameters.clone(),
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pid_target: state.pid.target as f32,
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pid_engaged: state.pid_engaged,
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i_set: i_set,
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i_set,
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polarity: state.polarity.clone(),
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sh: state.sh.clone(),
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pwm,
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adc_postfilter,
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@ -68,6 +70,7 @@ impl ChannelConfig {
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};
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let _ = channels.adc.set_postfilter(channel as u8, adc_postfilter);
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let _ = channels.set_i(channel, self.i_set);
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channels.set_polarity(channel, self.polarity.clone());
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}
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}
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