atse/thermostat
1
0
Fork 0
forked from M-Labs/thermostat
Code Issues Pull Requests Activity

Constants uom

Browse Source
This commit is contained in:
atse 2024-08-16 16:26:01 +08:00
parent c6040899dd
commit 9381feec1b
3 changed files with 29 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
src/ad7172/adc.rs
View File

@ -1,13 +1,11 @@
use core::marker::PhantomData;
use core::fmt; use core::fmt;
use log::{info, warn}; use log::{info, warn};
use stm32f4xx_hal::hal::{ use stm32f4xx_hal::hal::{
blocking::spi::Transfer, blocking::spi::Transfer,
digital::v2::OutputPin, digital::v2::OutputPin,
}; };
use uom::si::{ use uom::si::f64::ElectricPotential;
f64::ElectricPotential,
electric_potential::volt,
};
use super::{ use super::{
regs::{self, Register, RegisterData}, regs::{self, Register, RegisterData},
checksum::{ChecksumMode, Checksum}, checksum::{ChecksumMode, Checksum},
@ -270,7 +268,11 @@ impl ChannelCalibration {
let data = data + (self.offset as i32 - 0x80_0000) as f64; let data = data + (self.offset as i32 - 0x80_0000) as f64;
let data = data / (2 << 23) as f64; let data = data / (2 << 23) as f64;
const V_REF: f64 = 3.3; const V_REF: ElectricPotential = ElectricPotential {
ElectricPotential::new::<volt>(data * V_REF / 0.75) dimension: PhantomData,
units: PhantomData,
value: 3.3,
};
data * V_REF / 0.75
} }
} }

20
src/channel_state.rs
View File

@ -1,3 +1,5 @@
use core::marker::PhantomData;
use smoltcp::time::{Duration, Instant}; use smoltcp::time::{Duration, Instant};
use uom::si::{ use uom::si::{
f64::{ f64::{
@ -9,7 +11,6 @@ use uom::si::{
}, },
electric_potential::volt, electric_potential::volt,
electric_current::ampere, electric_current::ampere,
electrical_resistance::ohm,
thermodynamic_temperature::degree_celsius, thermodynamic_temperature::degree_celsius,
time::millisecond, time::millisecond,
}; };
@ -20,8 +21,16 @@ use crate::{
command_parser::CenterPoint, command_parser::CenterPoint,
}; };
const R_INNER: f64 = 2.0 * 5100.0; const R_INNER: ElectricalResistance = ElectricalResistance {
const VREF_SENS: f64 = 3.3 / 2.0; dimension: PhantomData,
units: PhantomData,
value: 2.0 * 5100.0,
};
const VREF_SENS: ElectricPotential = ElectricPotential {
dimension: PhantomData,
units: PhantomData,
value: 3.3 / 2.0,
};
pub struct ChannelState { pub struct ChannelState {
pub adc_data: Option<u32>, pub adc_data: Option<u32>,
@ -87,10 +96,9 @@ impl ChannelState {
/// Get `SENS[01]` input resistance /// Get `SENS[01]` input resistance
pub fn get_sens(&self) -> Option<ElectricalResistance> { pub fn get_sens(&self) -> Option<ElectricalResistance> {
let r_inner = ElectricalResistance::new::<ohm>(R_INNER); let vref = VREF_SENS;
let vref = ElectricPotential::new::<volt>(VREF_SENS);
let adc_input = self.get_adc()?; let adc_input = self.get_adc()?;
let r = r_inner * adc_input / (vref - adc_input); let r = R_INNER * adc_input / (vref - adc_input);
Some(r) Some(r)
} }

11
src/channels.rs
View File

@ -31,7 +31,11 @@ pub enum PinsAdcReadTarget {
} }
pub const CHANNELS: usize = 2; pub const CHANNELS: usize = 2;
pub const R_SENSE: f64 = 0.05; pub const R_SENSE: ElectricalResistance = ElectricalResistance {
dimension: PhantomData,
units: PhantomData,
value: 0.05,
};
// From design specs // From design specs
pub const MAX_TEC_I: ElectricCurrent = ElectricCurrent { pub const MAX_TEC_I: ElectricCurrent = ElectricCurrent {
@ -159,10 +163,9 @@ impl Channels {
_ => unreachable!(), _ => unreachable!(),
}; };
let center_point = vref_meas; let center_point = vref_meas;
let r_sense = ElectricalResistance::new::<ohm>(R_SENSE); let voltage = i_set * 10.0 * R_SENSE + center_point;
let voltage = i_set * 10.0 * r_sense + center_point;
let voltage = self.set_dac(channel, voltage); let voltage = self.set_dac(channel, voltage);
let i_set = (voltage - center_point) / (10.0 * r_sense); let i_set = (voltage - center_point) / (10.0 * R_SENSE);
self.channel_state(channel).i_set = i_set; self.channel_state(channel).i_set = i_set;
i_set i_set
} }