thermostat/src/hw_rev.rs

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use serde::Serialize;
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use crate::{command_handler::JsonBuffer, pins::HWRevPins};
#[derive(Serialize, Copy, Clone)]
pub struct HWRev {
pub major: u8,
pub minor: u8,
}
#[derive(Serialize, Clone)]
pub struct HWSettings {
pub fan_k_a: f32,
pub fan_k_b: f32,
pub fan_k_c: f32,
pub min_fan_pwm: f32,
pub max_fan_pwm: f32,
pub fan_pwm_freq_hz: u32,
pub fan_available: bool,
pub fan_pwm_recommended: bool,
}
#[derive(Serialize, Clone)]
struct HWSummary<'a> {
rev: &'a HWRev,
settings: &'a HWSettings,
}
impl HWRev {
pub fn detect_hw_rev(hwrev_pins: &HWRevPins) -> Self {
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let (h0, h1, h2, h3) = (
hwrev_pins.hwrev0.is_high(),
hwrev_pins.hwrev1.is_high(),
hwrev_pins.hwrev2.is_high(),
hwrev_pins.hwrev3.is_high(),
);
match (h0, h1, h2, h3) {
(true, true, true, false) => HWRev { major: 1, minor: 0 },
(true, false, false, false) => HWRev { major: 2, minor: 0 },
(false, true, false, false) => HWRev { major: 2, minor: 2 },
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(_, _, _, _) => HWRev { major: 0, minor: 0 },
}
}
pub fn settings(&self) -> HWSettings {
match (self.major, self.minor) {
(2, 2) => HWSettings {
fan_k_a: 1.0,
fan_k_b: 0.0,
fan_k_c: 0.0,
// below this value motor's autostart feature may fail,
// according to internal experiments
min_fan_pwm: 0.04,
max_fan_pwm: 1.0,
// According to `SUNON DC Brushless Fan & Blower(255-E)` catalogue p.36-37
// model MF35101V1-1000U-G99 doesn't have a PWM wire, but we'll follow their others models'
// recommended frequency, as it is said by the Thermostat's schematics that we can
// use PWM, but not stated at which frequency
fan_pwm_freq_hz: 25_000,
fan_available: true,
// see https://github.com/sinara-hw/Thermostat/issues/115 and
// https://git.m-labs.hk/M-Labs/thermostat/issues/69#issuecomment-6464 for explanation
fan_pwm_recommended: false,
},
(_, _) => HWSettings {
fan_k_a: 0.0,
fan_k_b: 0.0,
fan_k_c: 0.0,
min_fan_pwm: 0.0,
max_fan_pwm: 0.0,
fan_pwm_freq_hz: 0,
fan_available: false,
fan_pwm_recommended: false,
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},
}
}
pub fn summary(&self) -> Result<JsonBuffer, serde_json_core::ser::Error> {
let settings = self.settings();
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let summary = HWSummary {
rev: self,
settings: &settings,
};
serde_json_core::to_vec(&summary)
}
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}