Add swap command

Per-channel current swapping, for use with Zotino in the meantime on
HWRevs < 3.0 as the Zotino headers are swapped on the Thermostat.
This commit is contained in:
atse 2024-03-06 14:50:33 +08:00
parent 00d5feaa8d
commit 6fadfc0b49
6 changed files with 57 additions and 6 deletions

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@ -130,6 +130,7 @@ formatted as line-delimited JSON.
| `fcurve <a> <b> <c>` | Set fan controller curve coefficients (see *Fan control* section) |
| `fcurve default` | Set fan controller curve coefficients to defaults (see *Fan control* section) |
| `hwrev` | Show hardware revision, and settings related to it |
| `swap [0/1]` | Swap TEC polarities for channel all/0/1 (For use with Zotino) |
## USB
@ -180,9 +181,11 @@ postfilter rate can be tuned with the `postfilter` command.
## Thermo-Electric Cooling (TEC)
- Connect TEC module device 0 to TEC0- and TEC0+.
- Connect TEC module device 1 to TEC1- and TEC1+.
- The GND pin is for shielding not for sinking TEC module currents.
- Connect TEC module device 0 to TEC0-/T0- and TEC0+/T0+.
- Connect TEC module device 1 to TEC1-/T1- and TEC1+/T1+.
- The GND pin is for shielding, not for sinking TEC module currents.
For Zotino temperature regulation, connect an IDC cable to the internal Zotino header labeled TEC1/TEC2. For pre 3.0 Thermostats, use the `swap` command for those channels.
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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@ -35,6 +35,7 @@ pub struct ChannelState {
pub pid_engaged: bool,
pub pid: pid::Controller,
pub sh: sh::Parameters,
pub swap_tec_polarity: bool,
}
impl ChannelState {
@ -51,6 +52,7 @@ impl ChannelState {
pid_engaged: false,
pid: pid::Controller::new(pid::Parameters::default()),
sh: sh::Parameters::default(),
swap_tec_polarity: false,
}
}

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@ -118,7 +118,11 @@ impl<'a> Channels<'a> {
pub fn get_i(&mut self, channel: usize) -> ElectricCurrent {
let i_set = self.channel_state(channel).i_set;
i_set
if self.channel_state(channel).swap_tec_polarity {
-i_set
} else {
i_set
}
}
/// i_set DAC
@ -137,13 +141,16 @@ impl<'a> Channels<'a> {
// Silently clamp i_set
let i_ceiling = ElectricCurrent::new::<ampere>(MAX_TEC_I);
let i_floor = ElectricCurrent::new::<ampere>(-MAX_TEC_I);
let i_set = i_set.min(i_ceiling).max(i_floor);
let mut i_set = i_set.min(i_ceiling).max(i_floor);
let vref_meas = match channel.into() {
0 => self.channel0.vref_meas,
1 => self.channel1.vref_meas,
_ => unreachable!(),
};
if self.channel_state(channel).swap_tec_polarity {
i_set = -i_set;
}
let center_point = vref_meas;
let r_sense = ElectricalResistance::new::<ohm>(R_SENSE);
let voltage = i_set * 10.0 * r_sense + center_point;
@ -390,7 +397,12 @@ impl<'a> Channels<'a> {
// Get 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)
let tec_i = (self.read_itec(channel) - self.read_vref(channel)) / ElectricalResistance::new::<ohm>(0.4);
if self.channel_state(channel).swap_tec_polarity {
-tec_i
} else {
tec_i
}
}
// Get voltage across TEC

View File

@ -412,6 +412,16 @@ impl Handler {
}
}
fn swap_tec_polarity (socket: &mut TcpSocket, channels: &mut Channels, channel: Option<usize>) -> Result<Handler, Error> {
for c in 0..CHANNELS {
if channel.is_none() || channel == Some(c) {
channels.channel_state(c).swap_tec_polarity = !channels.channel_state(c).swap_tec_polarity;
}
}
send_line(socket, b"{}");
Ok(Handler::Handled)
}
pub fn handle_command(command: Command, socket: &mut TcpSocket, channels: &mut Channels, session: &Session, store: &mut FlashStore, ipv4_config: &mut Ipv4Config, fan_ctrl: &mut FanCtrl, hwrev: HWRev) -> Result<Self, Error> {
match command {
Command::Quit => Ok(Handler::CloseSocket),
@ -441,6 +451,7 @@ impl Handler {
Command::FanCurve { k_a, k_b, k_c } => Handler::fan_curve(socket, fan_ctrl, k_a, k_b, k_c),
Command::FanCurveDefaults => Handler::fan_defaults(socket, fan_ctrl),
Command::ShowHWRev => Handler::show_hwrev(socket, hwrev),
Command::SwapTECPolarity { channel } => Handler::swap_tec_polarity(socket, channels, channel),
}
}
}

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@ -191,6 +191,9 @@ pub enum Command {
},
FanCurveDefaults,
ShowHWRev,
SwapTECPolarity {
channel: Option<usize>,
},
}
fn end(input: &[u8]) -> IResult<&[u8], ()> {
@ -584,6 +587,22 @@ fn fan_curve(input: &[u8]) -> IResult<&[u8], Result<Command, Error>> {
))(input)
}
fn swap(input: &[u8]) -> IResult<&[u8], Result<Command, Error>> {
let (input, _) = tag("swap")(input)?;
let (input, channel) = alt((
|input| {
let (input, _) = whitespace(input)?;
let (input, channel) = channel(input)?;
let (input, _) = end(input)?;
Ok((input, Some(channel)))
},
value(None, end)
))(input)?;
let result = Ok(Command::SwapTECPolarity { channel });
Ok((input, result))
}
fn command(input: &[u8]) -> IResult<&[u8], Result<Command, Error>> {
alt((value(Ok(Command::Quit), tag("quit")),
load,
@ -600,6 +619,7 @@ fn command(input: &[u8]) -> IResult<&[u8], Result<Command, Error>> {
fan,
fan_curve,
value(Ok(Command::ShowHWRev), tag("hwrev")),
swap,
))(input)
}

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@ -22,6 +22,7 @@ pub struct ChannelConfig {
pwm: PwmLimits,
/// uses variant `PostFilter::Invalid` instead of `None` to save space
adc_postfilter: PostFilter,
swap_tec_polarity: bool,
}
impl ChannelConfig {
@ -41,6 +42,7 @@ impl ChannelConfig {
sh: state.sh.clone(),
pwm,
adc_postfilter,
swap_tec_polarity: state.swap_tec_polarity,
}
}
@ -51,6 +53,7 @@ impl ChannelConfig {
state.pid.target = self.pid_target.into();
state.pid_engaged = self.pid_engaged;
state.sh = self.sh.clone();
state.swap_tec_polarity = self.swap_tec_polarity;
self.pwm.apply(channels, channel);