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Support fan PWM settings #73

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sb10q merged 16 commits from esavkin/thermostat:69-fan_pwm into master 2023-03-22 17:15:49 +08:00
Conversation 9 Commits 16 Files Changed 8 +351 -199
7 changed files with 351 additions and 199 deletions
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72
README.md
View File

@ -94,38 +94,40 @@ The scope of this setting is per TCP session.
Send commands as simple text string terminated by `\n`. Responses are
formatted as line-delimited JSON.
| Syntax | Function |
|----------------------------------|----------------------------------------------------------------------|
| `report` | Show current input |
| `report mode` | Show current report mode |
| `report mode <off/on>` | Set report mode |
| `pwm` | Show current PWM settings |
| `pwm <0/1> max_i_pos <amp>` | Set maximum positive output current |
| `pwm <0/1> max_i_neg <amp>` | Set maximum negative output current |
| `pwm <0/1> max_v <volt>` | Set maximum output voltage |
| `pwm <0/1> i_set <amp>` | Disengage PID, set fixed output current |
| `pwm <0/1> pid` | Let output current to be controlled by the PID |
| `center <0/1> <volt>` | Set the MAX1968 0A-centerpoint to the specified fixed voltage |
| `center <0/1> vref` | Set the MAX1968 0A-centerpoint to measure from VREF |
| `pid` | Show PID configuration |
| `pid <0/1> target <deg_celsius>` | Set the PID controller target temperature |
| `pid <0/1> kp <value>` | Set proportional gain |
| `pid <0/1> ki <value>` | Set integral gain |
| `pid <0/1> kd <value>` | Set differential gain |
| `pid <0/1> output_min <amp>` | Set mininum output |
| `pid <0/1> output_max <amp>` | Set maximum output |
| `s-h` | Show Steinhart-Hart equation parameters |
| `s-h <0/1> <t0/b/r0> <value>` | Set Steinhart-Hart parameter for a channel |
| `postfilter` | Show postfilter settings |
| `postfilter <0/1> off` | Disable postfilter |
| `postfilter <0/1> rate <rate>` | Set postfilter output data rate |
| `load [0/1]` | Restore configuration for channel all/0/1 from flash |
| `save [0/1]` | Save configuration for channel all/0/1 to flash |
| `reset` | Reset the device |
| `dfu` | Reset device and enters USB device firmware update (DFU) mode |
| `ipv4 <X.X.X.X/L> [Y.Y.Y.Y]` | Configure IPv4 address, netmask length, and optional default gateway |
| `fan` | Show current fan settings and sensors' measurements |
| `fan <value>` | Set fan power with values from 0 to 100, where 0 is auto mode |
| Syntax | Function |
|----------------------------------|---------------------------------------------------------------------------|
| `report` | Show current input |
| `report mode` | Show current report mode |
| `report mode <off/on>` | Set report mode |
| `pwm` | Show current PWM settings |
| `pwm <0/1> max_i_pos <amp>` | Set maximum positive output current |
| `pwm <0/1> max_i_neg <amp>` | Set maximum negative output current |
| `pwm <0/1> max_v <volt>` | Set maximum output voltage |
| `pwm <0/1> i_set <amp>` | Disengage PID, set fixed output current |
| `pwm <0/1> pid` | Let output current to be controlled by the PID |
| `center <0/1> <volt>` | Set the MAX1968 0A-centerpoint to the specified fixed voltage |
| `center <0/1> vref` | Set the MAX1968 0A-centerpoint to measure from VREF |
| `pid` | Show PID configuration |
| `pid <0/1> target <deg_celsius>` | Set the PID controller target temperature |
| `pid <0/1> kp <value>` | Set proportional gain |
| `pid <0/1> ki <value>` | Set integral gain |
| `pid <0/1> kd <value>` | Set differential gain |
| `pid <0/1> output_min <amp>` | Set mininum output |
| `pid <0/1> output_max <amp>` | Set maximum output |
| `s-h` | Show Steinhart-Hart equation parameters |
| `s-h <0/1> <t0/b/r0> <value>` | Set Steinhart-Hart parameter for a channel |
| `postfilter` | Show postfilter settings |
| `postfilter <0/1> off` | Disable postfilter |
| `postfilter <0/1> rate <rate>` | Set postfilter output data rate |
| `load [0/1]` | Restore configuration for channel all/0/1 from flash |
| `save [0/1]` | Save configuration for channel all/0/1 to flash |
| `reset` | Reset the device |
| `dfu` | Reset device and enters USB device firmware update (DFU) mode |
| `ipv4 <X.X.X.X/L> [Y.Y.Y.Y]` | Configure IPv4 address, netmask length, and optional default gateway |
| `fan` | Show current fan settings and sensors' measurements |
| `fan <value>` | Set fan power with values from 0 to 100, where 0 is auto mode |
| `fcurve <a> <b> <c>` | Set fan controller coefficients (see *Fan control* section) |
| `fan-restore` | Set fan controller coefficients to defaults (see *Fan control* section) |
## USB
@ -274,10 +276,14 @@ The thermostat implements a PID control loop for each of the TEC channels, more
## Fan control
sb10q marked this conversation as resolved
sb10q commented 2022-12-21 16:17:04 +08:00
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Why is it so approximate?

Why is it so approximate?
esavkin commented 2022-12-21 17:13:24 +08:00
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Mostly because I cannot guarantee it is precise and would not like to see how someone would tie something-very-important to its value.

Mostly because I cannot guarantee it is precise and would not like to see how someone would tie something-very-important to its value.
Fan control is available for the thermostat revisions with integrated fan system. For this purpose two commands are available:
Fan control is available for the thermostat revisions with integrated fan system. For this purpose four commands are available:
1. `fan` - show fan stats: `fan_pwm`, `tacho`, `abs_max_tec_i`, `auto_mode`. Please note that `tacho` shows *approximate* value, which
linearly correlates with the actual fan speed.
2. `fan <value>` - set the fan power with the value from `0` to `100`. Since there is no hardware way to disable the fan,
`0` value is used for enabling automatic fan control mode, which correlates with the square of the TEC's current.
Values from `1` to `100` are used for setting the power from minimum to maximum respectively.
Please note that power doesn't correlate with the actual speed linearly.
3. `fcurve <a> <b> <c>` - set coefficients of the controlling curve `a*x^2 + b*x + c`, where `x` is `abs_max_tec_i/MAX_TEC_I`,
i.e. receives values from 0 to 1 linearly tied to the maximum current. The controlling curve should produce values from 0 to 1,
as below and beyond values would be substituted by 0 and 1 respectively.
4. `fan-restore` - restore fan settings to defaults: `auto = true, a = 1.0, b = 0.0, c = 0.0`.

87
src/channels.rs
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@ -19,22 +19,13 @@ use crate::{
command_parser::{CenterPoint, PwmPin},
pins,
steinhart_hart,
fan_ctrl::HWRev,
};
use crate::pins::HWRevPins;
pub const CHANNELS: usize = 2;
pub const R_SENSE: f64 = 0.05;
// DAC chip outputs 0-5v, which is then passed through a resistor dividor to provide 0-3v range
const DAC_OUT_V_MAX: f64 = 3.0;
const MAX_TEC_I: f64 = 3.0; // as stated in the schemes
const MAX_FAN_PWM: f64 = 100.0;
const MIN_FAN_PWM: f64 = 1.0;
#[derive(Serialize, Copy, Clone)]
pub struct HWRev {
pub major: u8,
pub minor: u8
}
// TODO: -pub
pub struct Channels {
@ -44,8 +35,7 @@ pub struct Channels {
/// stm32f4 integrated adc
pins_adc: pins::PinsAdc,
pub pwm: pins::PwmPins,
hw_rev: HWRev,
fan_auto: bool
pub hwrev: HWRev,
}
impl Channels {
@ -68,7 +58,7 @@ impl Channels {
let pins_adc = pins.pins_adc;
let pwm = pins.pwm;
let mut channels = Channels { channel0, channel1, adc, pins_adc, pwm,
hw_rev: Self::detect_hw_rev(&pins.hwrev), fan_auto: true };
hwrev: HWRev::detect_hw_rev(&pins.hwrev)};
for channel in 0..CHANNELS {
channels.channel_state(channel).vref = channels.read_vref(channel);
channels.calibrate_dac_value(channel);
@ -77,21 +67,6 @@ impl Channels {
channels
}
fn detect_hw_rev(hwrev_pins: &HWRevPins) -> HWRev {
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} ,
(_, _, _, _) => HWRev {major: 0, minor: 0}
}
}
pub fn fan_available(&self) -> bool {
self.hw_rev.major == 2 && self.hw_rev.minor == 2
}
pub fn channel_state<I: Into<usize>>(&mut self, channel: I) -> &mut ChannelState {
match channel.into() {
0 => &mut self.channel0.state,
@ -365,8 +340,6 @@ impl Channels {
match (channel, pin) {
(_, PwmPin::ISet) =>
panic!("i_set is no pwm pin"),
(_, PwmPin::Fan) =>
get(&self.pwm.fan),
(0, PwmPin::MaxIPos) =>
get(&self.pwm.max_i_pos0),
(0, PwmPin::MaxINeg) =>
@ -422,8 +395,6 @@ impl Channels {
match (channel, pin) {
(_, PwmPin::ISet) =>
panic!("i_set is no pwm pin"),
(_, PwmPin::Fan) =>
set(&mut self.pwm.fan, duty),
(0, PwmPin::MaxIPos) =>
set(&mut self.pwm.max_i_pos0, duty),
(0, PwmPin::MaxINeg) =>
@ -462,19 +433,6 @@ impl Channels {
(duty * max, max)
}
pub fn set_fan_pwm(&mut self, fan_pwm: u32) -> f64 {
let duty = fan_pwm as f64 / MAX_FAN_PWM;
self.set_pwm(0, PwmPin::Fan, duty)
}
pub fn get_fan_pwm(&mut self) -> u32 {
(self.get_pwm(0, PwmPin::Fan) * MAX_FAN_PWM) as u32
}
pub fn set_fan_auto_mode(&mut self, fan_auto: bool) {
self.fan_auto = fan_auto;
}
fn report(&mut self, channel: usize) -> Report {
let vref = self.channel_state(channel).vref;
let i_set = self.get_i(channel);
@ -500,7 +458,7 @@ impl Channels {
tec_i,
tec_u_meas: self.get_tec_v(channel),
pid_output,
hwrev: self.hw_rev
hwrev: self.hwrev
}
}
@ -566,39 +524,14 @@ impl Channels {
serde_json_core::to_vec(&summaries)
}
fn current_abs_max_tec_i(&mut self) -> f64 {
pub fn current_abs_max_tec_i(&mut self) -> f64 {
max_by(self.get_tec_i(0).abs().get::<ampere>(),
self.get_tec_i(1).abs().get::<ampere>(),
|a, b| a.partial_cmp(b).unwrap_or(core::cmp::Ordering::Equal))
}
pub fn fan_summary(&mut self, tacho: Option<u32>) -> Result<JsonBuffer, serde_json_core::ser::Error> {
if self.fan_available() {
let summary = FanSummary {
fan_pwm: self.get_fan_pwm(),
tacho: tacho.unwrap_or(u32::MAX),
abs_max_tec_i: self.current_abs_max_tec_i(),
auto_mode: self.fan_auto
};
serde_json_core::to_vec(&summary)
} else {
let summary: Option<()> = None;
serde_json_core::to_vec(&summary)
}
}
pub fn fan_ctrl(&mut self) {
if self.fan_auto && self.fan_available() {
let scaled_current = self.current_abs_max_tec_i() / MAX_TEC_I;
let pwm = max_by(scaled_current * scaled_current * MAX_FAN_PWM,
MIN_FAN_PWM,
|a, b| a.partial_cmp(b).unwrap_or(core::cmp::Ordering::Equal)) as u32;
self.set_fan_pwm(pwm);
}
}
}
type JsonBuffer = Vec<u8, U1024>;
pub type JsonBuffer = Vec<u8, U1024>;
#[derive(Serialize)]
pub struct Report {
@ -670,11 +603,3 @@ pub struct SteinhartHartSummary {
channel: usize,
params: steinhart_hart::Parameters,
}
#[derive(Serialize)]
pub struct FanSummary {
fan_pwm: u32,
tacho: u32,
abs_max_tec_i: f64,
auto_mode: bool,
}

32
src/command_handler.rs
View File

@ -22,7 +22,8 @@ use super::{
config::ChannelConfig,
dfu,
flash_store::FlashStore,
session::Session
session::Session,
FanCtrl,
};
use uom::{
@ -199,9 +200,6 @@ impl Handler {
let current = ElectricCurrent::new::<ampere>(value);
channels.set_max_i_neg(channel, current);
}
PwmPin::Fan => {
channels.set_fan_pwm(value as u32);
}
}
send_line(socket, b"{}");
Ok(Handler::Handled)
@ -344,14 +342,14 @@ impl Handler {
Ok(Handler::Reset)
}
fn fan (socket: &mut TcpSocket, channels: &mut Channels, fan_pwm: Option<u32>, tacho_value: Option<u32>) -> Result<Handler, Error> {
fn fan (socket: &mut TcpSocket, fan_pwm: Option<u32>, fan_ctrl: &mut FanCtrl) -> Result<Handler, Error> {
match fan_pwm {
Some(val) => {
channels.set_fan_auto_mode(val == 0);
channels.set_fan_pwm(val);
fan_ctrl.set_auto_mode(val == 0);
fan_ctrl.set_pwm(val);
},
None => {
match channels.fan_summary(tacho_value) {
match fan_ctrl.summary() {
Ok(buf) => {
send_line(socket, &buf);
return Ok(Handler::Handled);
@ -368,7 +366,19 @@ impl Handler {
Ok(Handler::Handled)
}
pub fn handle_command (command: Command, socket: &mut TcpSocket, channels: &mut Channels, session: &Session, leds: &mut Leds, store: &mut FlashStore, ipv4_config: &mut Ipv4Config, tacho_value: Option<u32>) -> Result<Self, Error> {
fn fan_coeff (socket: &mut TcpSocket, fan_ctrl: &mut FanCtrl, k_a: f64, k_b: f64, k_c: f64) -> Result<Handler, Error> {
fan_ctrl.set_coefficients(k_a, k_b, k_c);
send_line(socket, b"{}");
Ok(Handler::Handled)
}
fn fan_defaults (socket: &mut TcpSocket, fan_ctrl: &mut FanCtrl) -> Result<Handler, Error> {
fan_ctrl.restore_defaults();
send_line(socket, b"{}");
Ok(Handler::Handled)
}
pub fn handle_command (command: Command, socket: &mut TcpSocket, channels: &mut Channels, session: &Session, leds: &mut Leds, store: &mut FlashStore, ipv4_config: &mut Ipv4Config, fan_ctrl: &mut FanCtrl) -> Result<Self, Error> {
match command {
Command::Quit => Ok(Handler::CloseSocket),
Command::Reporting(_reporting) => Handler::reporting(socket),
@ -391,7 +401,9 @@ impl Handler {
Command::Ipv4(config) => Handler::set_ipv4(socket, store, config),
Command::Reset => Handler::reset(channels),
Command::Dfu => Handler::dfu(channels),
Command::Fan {fan_pwm} => Handler::fan(socket, channels, fan_pwm, tacho_value)
Command::Fan {fan_pwm} => Handler::fan(socket, fan_pwm, fan_ctrl),
Command::FanCoeff { k_a, k_b, k_c } => Handler::fan_coeff(socket, fan_ctrl, k_a, k_b, k_c),
Command::FanDefaults => Handler::fan_defaults(socket, fan_ctrl),
}
}
}

49
src/command_parser.rs
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@ -1,16 +1,7 @@
use core::fmt;
use core::num::ParseIntError;
use core::str::{from_utf8, Utf8Error};
use nom::{
IResult,
branch::alt,
bytes::complete::{is_a, tag, take_while1},
character::{is_digit, complete::{char, one_of}},
combinator::{complete, map, opt, value},
sequence::preceded,
multi::{fold_many0, fold_many1},
error::ErrorKind,
};
use nom::{IResult, branch::alt, bytes::complete::{is_a, tag, take_while1}, character::{is_digit, complete::{char, one_of}}, combinator::{complete, map, opt, value}, sequence::preceded, multi::{fold_many0, fold_many1}, error::ErrorKind, Needed};
use num_traits::{Num, ParseFloatError};
use serde::{Serialize, Deserialize};
@ -127,7 +118,6 @@ pub enum PwmPin {
MaxIPos,
MaxINeg,
MaxV,
Fan
}
#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
@ -181,7 +171,13 @@ pub enum Command {
Dfu,
Fan {
fan_pwm: Option<u32>
}
},
FanCoeff {
k_a: f64,
k_b: f64,
k_c: f64,
},
FanDefaults,
}
fn end(input: &[u8]) -> IResult<&[u8], ()> {
@ -540,6 +536,33 @@ fn fan(input: &[u8]) -> IResult<&[u8], Result<Command, Error>> {
Ok((input, result))
}
fn fan_coeff(input: &[u8]) -> IResult<&[u8], Result<Command, Error>> {
let (input, _) = tag("fcurve")(input)?;
let (input, coeffs) = alt((
|input| {
let (input, _) = whitespace(input)?;
let (input, k_a) = float(input)?;
let (input, _) = whitespace(input)?;
let (input, k_b) = float(input)?;
let (input, _) = whitespace(input)?;
let (input, k_c) = float(input)?;
let (input, _) = end(input)?;
if k_a.is_ok() && k_b.is_ok() && k_c.is_ok() {
Ok((input, Some((k_a.unwrap(), k_b.unwrap(), k_c.unwrap()))))
} else {
Err(nom::Err::Incomplete(Needed::Size(3)))
}
},
value(None, end)
))(input)?;
let result = match coeffs {
Some(coeffs) => Ok(Command::FanCoeff { k_a: coeffs.0, k_b: coeffs.1, k_c: coeffs.2 }),
None => Err(Error::ParseFloat)
};
Ok((input, result))
}
fn command(input: &[u8]) -> IResult<&[u8], Result<Command, Error>> {
alt((value(Ok(Command::Quit), tag("quit")),
load,
@ -553,7 +576,9 @@ fn command(input: &[u8]) -> IResult<&[u8], Result<Command, Error>> {
steinhart_hart,
postfilter,
value(Ok(Command::Dfu), tag("dfu")),
value(Ok(Command::FanDefaults), tag("fan-restore")),
fan,
fan_coeff,
))(input)
}

218
src/fan_ctrl.rs Normal file
View File

@ -0,0 +1,218 @@
use core::{cmp::max_by};
use serde::Serialize;
use stm32f4xx_hal::{
pwm::{self, PwmChannels},
pac::TIM8,
gpio::{
Floating, Input, ExtiPin,
gpioc::PC8, Edge,
},
stm32::EXTI,
syscfg::{SysCfg},
};
use smoltcp::time::Instant;
use crate::{
pins::HWRevPins,
channels::{Channels, JsonBuffer},
timer
};
pub type FanPin = PwmChannels<TIM8, pwm::C4>;
pub type TachoPin = PC8<Input<Floating>>;
const MAX_TEC_I: f64 = 3.0;
// as stated in the schematics
const MAX_FAN_PWM: f64 = 100.0;
sb10q commented 2023-03-15 13:12:50 +08:00
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Those naive values will need proper testing and determination at some point.

Those naive values will need proper testing and determination at some point.
👀 1
const MIN_FAN_PWM: f64 = 1.0;
const TACHO_MEASURE_MS: i64 = 2500;
const DEFAULT_K_A: f64 = 1.0;
const DEFAULT_K_B: f64 = 0.0;
const DEFAULT_K_C: f64 = 0.0;
#[derive(Serialize, Copy, Clone)]
pub struct HWRev {
pub major: u8,
pub minor: u8,
}
struct TachoCtrl {
tacho: TachoPin,
tacho_cnt: u32,
tacho_value: Option<u32>,
prev_epoch: i64,
}
pub struct FanCtrl<'a> {
fan: FanPin,
tacho: TachoCtrl,
fan_auto: bool,
available: bool,
k_a: f64,
k_b: f64,
k_c: f64,
channels: &'a mut Channels,
}
impl<'a> FanCtrl<'a> {
pub fn new(mut fan: FanPin, tacho: TachoPin, channels: &'a mut Channels, exti: &mut EXTI, syscfg: &mut SysCfg) -> Self {
let available = channels.hwrev.fan_available();
let mut tacho_ctrl = TachoCtrl::new(tacho);
if available {
fan.set_duty(0);
fan.enable();
tacho_ctrl.init(exti, syscfg);
}
sb10q commented 2023-03-15 13:14:18 +08:00
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inline

inline
👍 1
FanCtrl {
fan,
tacho: tacho_ctrl,
available,
fan_auto: true,
k_a: DEFAULT_K_A,
k_b: DEFAULT_K_B,
k_c: DEFAULT_K_C,
channels,
}
}
pub fn cycle(&mut self) {
if self.available {
self.tacho.cycle();
}
self.adjust_speed();
}
sb10q commented 2023-03-15 13:14:39 +08:00
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this doesn't need to be pub

this doesn't need to be ``pub``
👍 1
pub fn summary(&mut self) -> Result<JsonBuffer, serde_json_core::ser::Error> {
if self.available {
let summary = FanSummary {
fan_pwm: self.get_pwm(),
tacho: self.tacho.get(),
abs_max_tec_i: self.channels.current_abs_max_tec_i(),
auto_mode: self.fan_auto,
k_a: self.k_a,
k_b: self.k_b,
k_c: self.k_c,
};
serde_json_core::to_vec(&summary)
} else {
let summary: Option<()> = None;
serde_json_core::to_vec(&summary)
}
}
pub fn adjust_speed(&mut self) {
if self.fan_auto && self.available {
let scaled_current = self.channels.current_abs_max_tec_i() / MAX_TEC_I;
// do not limit upper bound, as it will be limited in the set_pwm()
let pwm = max_by(MAX_FAN_PWM * (scaled_current * (scaled_current * self.k_a + self.k_b) + self.k_c),
MIN_FAN_PWM,
|a, b| a.partial_cmp(b).unwrap_or(core::cmp::Ordering::Equal)) as u32;
self.set_pwm(pwm);
}
}
#[inline]
pub fn set_auto_mode(&mut self, fan_auto: bool) {
self.fan_auto = fan_auto;
}
#[inline]
pub fn set_coefficients(&mut self, k_a: f64, k_b: f64, k_c: f64) {
self.k_a = k_a;
self.k_b = k_b;
self.k_c = k_c;
}
#[inline]
pub fn restore_defaults(&mut self) {
self.set_auto_mode(true);
self.set_coefficients(DEFAULT_K_A, DEFAULT_K_B, DEFAULT_K_C);
}
pub fn set_pwm(&mut self, fan_pwm: u32) -> f64 {
let duty = fan_pwm as f64 / MAX_FAN_PWM;
let max = self.fan.get_max_duty();
let value = ((duty * (max as f64)) as u16).min(max);
self.fan.set_duty(value);
value as f64 / (max as f64)
}
fn get_pwm(&self) -> u32 {
let duty = self.fan.get_duty();
let max = self.fan.get_max_duty();
((duty as f64 / (max as f64)) * MAX_FAN_PWM) as u32
}
}
impl TachoCtrl {
pub fn new(tacho: TachoPin) -> Self {
TachoCtrl {
tacho,
tacho_cnt: 0,
tacho_value: None,
prev_epoch: 0,
}
}
pub fn init(&mut self, exti: &mut EXTI, syscfg: &mut SysCfg) {
// These lines do not cause NVIC to run the ISR,
// since the interrupt should be unmasked in the cortex_m::peripheral::NVIC.
// Also using interrupt-related workaround is the best
// option for the current version of stm32f4xx-hal,
// since tying the IC's PC8 with the PWM's PC9 to the same TIM8 is not supported,
// and therefore would require even more weirder and unsafe hacks.
// Also such hacks wouldn't guarantee it to be more precise.
self.tacho.make_interrupt_source(syscfg);
self.tacho.trigger_on_edge(exti, Edge::Rising);
self.tacho.enable_interrupt(exti);
}
pub fn cycle(&mut self) {
let tacho_input = self.tacho.check_interrupt();
if tacho_input {
self.tacho.clear_interrupt_pending_bit();
self.tacho_cnt += 1;
}
let instant = Instant::from_millis(i64::from(timer::now()));
if instant.millis - self.prev_epoch >= TACHO_MEASURE_MS {
self.tacho_value = Some(self.tacho_cnt);
self.tacho_cnt = 0;
self.prev_epoch = instant.millis;
}
}
pub fn get(&self) -> u32 {
self.tacho_value.unwrap_or(u32::MAX)
}
}
impl HWRev {
pub fn detect_hw_rev(hwrev_pins: &HWRevPins) -> Self {
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 },
(_, _, _, _) => HWRev { major: 0, minor: 0 }
}
}
pub fn fan_available(&self) -> bool {
self.major == 2 && self.minor == 2
}
}
#[derive(Serialize)]
pub struct FanSummary {
fan_pwm: u32,
tacho: u32,
abs_max_tec_i: f64,
auto_mode: bool,
k_a: f64,
k_b: f64,
k_c: f64,
}

59
src/main.rs
View File

@ -10,7 +10,7 @@ use panic_abort as _;
use panic_semihosting as _;
use log::{error, info, warn};
use core::cell::RefCell;
use cortex_m::asm::wfi;
use cortex_m_rt::entry;
use stm32f4xx_hal::{
@ -19,7 +19,6 @@ use stm32f4xx_hal::{
stm32::{CorePeripherals, Peripherals, SCB},
time::{U32Ext, MegaHertz},
watchdog::IndependentWatchdog,
gpio::{Edge, ExtiPin},
syscfg::SysCfgExt
};
use smoltcp::{
@ -56,6 +55,8 @@ mod flash_store;
mod dfu;
mod command_handler;
use command_handler::Handler;
mod fan_ctrl;
use fan_ctrl::FanCtrl;
const HSE: MegaHertz = MegaHertz(8);
#[cfg(not(feature = "semihosting"))]
@ -120,7 +121,7 @@ fn main() -> ! {
timer::setup(cp.SYST, clocks);
let (pins, mut leds, mut eeprom, eth_pins, usb, mut tacho) = Pins::setup(
let (pins, mut leds, mut eeprom, eth_pins, usb, fan, tacho) = Pins::setup(
clocks, dp.TIM1, dp.TIM3, dp.TIM8,
dp.GPIOA, dp.GPIOB, dp.GPIOC, dp.GPIOD, dp.GPIOE, dp.GPIOF, dp.GPIOG,
dp.I2C1,
@ -137,22 +138,22 @@ fn main() -> ! {
usb::State::setup(usb);
let mut channels = RefCell::new(Channels::new(pins));
let mut store = flash_store::store(dp.FLASH);
let mut channels = Channels::new(pins);
for c in 0..CHANNELS {
match store.read_value::<ChannelConfig>(CHANNEL_CONFIG_KEY[c]) {
Ok(Some(config)) =>
config.apply(&mut channels, c),
config.apply(channels.get_mut(), c),
Ok(None) =>
error!("flash config not found for channel {}", c),
Err(e) =>
error!("unable to load config {} from flash: {:?}", c, e),
}
}
let fan_available = channels.fan_available();
// considered safe since `channels` is being mutated in a single thread,
// while mutex would be excessive
let mut fan_ctrl = FanCtrl::new(fan, tacho, unsafe{ &mut *channels.as_ptr() }, &mut dp.EXTI, &mut dp.SYSCFG.constrain());
// default net config:
let mut ipv4_config = Ipv4Config {
@ -174,54 +175,22 @@ fn main() -> ! {
let hwaddr = EthernetAddress(eui48);
info!("EEPROM MAC address: {}", hwaddr);
if fan_available {
// These lines do not cause NVIC to run the ISR,
// since the interrupt should be unmasked in the cortex_m::peripheral::NVIC.
// Also using interrupt-related workaround is the best
// option for the current version of stm32f4xx-hal,
// since tying the IC's PC8 with the PWM's PC9 to the same TIM8 is not supported,
// and therefore would require even more weirder and unsafe hacks.
// Also such hacks wouldn't guarantee it to be more precise.
tacho.make_interrupt_source(&mut dp.SYSCFG.constrain());
tacho.trigger_on_edge(&mut dp.EXTI, Edge::Rising);
tacho.enable_interrupt(&mut dp.EXTI);
}
net::run(clocks, dp.ETHERNET_MAC, dp.ETHERNET_DMA, eth_pins, hwaddr, ipv4_config.clone(), |iface| {
Server::<Session>::run(iface, |server| {
leds.r1.off();
let mut should_reset = false;
let (mut tacho_cnt, mut tacho_value) = (0u32, None);
let mut prev_epoch: i64 = 0;
loop {
let mut new_ipv4_config = None;
let instant = Instant::from_millis(i64::from(timer::now()));
let updated_channel = channels.poll_adc(instant);
let updated_channel = channels.get_mut().poll_adc(instant);
if let Some(channel) = updated_channel {
server.for_each(|_, session| session.set_report_pending(channel.into()));
}
fan_ctrl.cycle();
let instant = Instant::from_millis(i64::from(timer::now()));
if fan_available {
let tacho_input = tacho.check_interrupt();
if tacho_input {
tacho.clear_interrupt_pending_bit();
tacho_cnt += 1;
}
let epoch = instant.secs();
if epoch > prev_epoch {
tacho_value = Some(tacho_cnt);
tacho_cnt = 0;
prev_epoch = epoch;
}
}
channels.fan_ctrl();
cortex_m::interrupt::free(net::clear_pending);
server.poll(instant)
.unwrap_or_else(|e| {
@ -244,7 +213,7 @@ fn main() -> ! {
// Do nothing and feed more data to the line reader in the next loop cycle.
Ok(SessionInput::Nothing) => {}
Ok(SessionInput::Command(command)) => {
match Handler::handle_command(command, &mut socket, &mut channels, session, &mut leds, &mut store, &mut ipv4_config, tacho_value) {
match Handler::handle_command(command, &mut socket, channels.get_mut(), session, &mut leds, &mut store, &mut ipv4_config, &mut fan_ctrl) {
Ok(Handler::NewIPV4(ip)) => new_ipv4_config = Some(ip),
Ok(Handler::Handled) => {},
Ok(Handler::CloseSocket) => socket.close(),
@ -261,7 +230,7 @@ fn main() -> ! {
}
} else if socket.can_send() {
if let Some(channel) = session.is_report_pending() {
match channels.reports_json() {
match channels.get_mut().reports_json() {
Ok(buf) => {
send_line(&mut socket, &buf[..]);
session.mark_report_sent(channel);

33
src/pins.rs
View File

@ -26,15 +26,18 @@ use stm32f4xx_hal::{
TIM1, TIM3, TIM8
},
timer::Timer,
time::U32Ext,
time::{U32Ext, KiloHertz},
};
use eeprom24x::{self, Eeprom24x};
use stm32_eth::EthPins;
use crate::{
channel::{Channel0, Channel1},
leds::Leds,
fan_ctrl::{TachoPin, FanPin}
};
const PWM_FREQ: KiloHertz = KiloHertz(20u32);
pub type Eeprom = Eeprom24x<
I2c<I2C1, (
PB8<AlternateOD<{ stm32f4xx_hal::gpio::AF4 }>>,
@ -128,7 +131,7 @@ impl Pins {
spi2: SPI2, spi4: SPI4, spi5: SPI5,
adc1: ADC1,
otg_fs_global: OTG_FS_GLOBAL, otg_fs_device: OTG_FS_DEVICE, otg_fs_pwrclk: OTG_FS_PWRCLK,
) -> (Self, Leds, Eeprom, EthernetPins, USB, PC8<Input<Floating>>) {
) -> (Self, Leds, Eeprom, EthernetPins, USB, FanPin, TachoPin) {
let gpioa = gpioa.split();
let gpiob = gpiob.split();
let gpioc = gpioc.split();
@ -143,10 +146,10 @@ impl Pins {
let pins_adc = Adc::adc1(adc1, true, Default::default());
let pwm = PwmPins::setup(
clocks, tim1, tim3, tim8,
clocks, tim1, tim3,
gpioc.pc6, gpioc.pc7,
gpioe.pe9, gpioe.pe11,
gpioe.pe13, gpioe.pe14, gpioc.pc9
gpioe.pe13, gpioe.pe14
);
let (dac0_spi, dac0_sync) = Self::setup_dac0(
@ -225,7 +228,9 @@ impl Pins {
hclk: clocks.hclk(),
};
(pins, leds, eeprom, eth_pins, usb, gpioc.pc8)
let fan = Timer::new(tim8, &clocks).pwm(gpioc.pc9.into_alternate(), 20u32.khz());
(pins, leds, eeprom, eth_pins, usb, fan, gpioc.pc8)
}
/// Configure the GPIO pins for SPI operation, and initialize SPI
@ -293,24 +298,20 @@ pub struct PwmPins {
pub max_i_pos1: PwmChannels<TIM1, pwm::C2>,
pub max_i_neg0: PwmChannels<TIM1, pwm::C3>,
pub max_i_neg1: PwmChannels<TIM1, pwm::C4>,
pub fan: PwmChannels<TIM8, pwm::C4>,
}
impl PwmPins {
fn setup<M1, M2, M3, M4, M5, M6, M7>(
fn setup<M1, M2, M3, M4, M5, M6>(
clocks: Clocks,
tim1: TIM1,
tim3: TIM3,
tim8: TIM8,
max_v0: PC6<M1>,
max_v1: PC7<M2>,
max_i_pos0: PE9<M3>,
max_i_pos1: PE11<M4>,
max_i_neg0: PE13<M5>,
max_i_neg1: PE14<M6>,
fan: PC9<M7>,
) -> PwmPins {
let freq = 20u32.khz();
fn init_pwm_pin<P: hal::PwmPin<Duty=u16>>(pin: &mut P) {
pin.set_duty(0);
@ -320,14 +321,11 @@ impl PwmPins {
max_v0.into_alternate(),
max_v1.into_alternate(),
);
//let (mut max_v0, mut max_v1) = pwm::tim3(tim3, channels, clocks, freq);
let (mut max_v0, mut max_v1) = Timer::new(tim3, &clocks).pwm(channels, freq);
//let (mut max_v0, mut max_v1) = pwm::tim3(tim3, channels, clocks, PWM_FREQ);
let (mut max_v0, mut max_v1) = Timer::new(tim3, &clocks).pwm(channels, PWM_FREQ);
init_pwm_pin(&mut max_v0);
init_pwm_pin(&mut max_v1);
let mut fan = Timer::new(tim8, &clocks).pwm(fan.into_alternate(), freq);
init_pwm_pin(&mut fan);
let channels = (
max_i_pos0.into_alternate(),
max_i_pos1.into_alternate(),
@ -335,7 +333,7 @@ impl PwmPins {
max_i_neg1.into_alternate(),
);
let (mut max_i_pos0, mut max_i_pos1, mut max_i_neg0, mut max_i_neg1) =
Timer::new(tim1, &clocks).pwm(channels, freq);
Timer::new(tim1, &clocks).pwm(channels, PWM_FREQ);
init_pwm_pin(&mut max_i_pos0);
init_pwm_pin(&mut max_i_neg0);
init_pwm_pin(&mut max_i_pos1);
@ -344,8 +342,7 @@ impl PwmPins {
PwmPins {
max_v0, max_v1,
max_i_pos0, max_i_pos1,
max_i_neg0, max_i_neg1,
fan
max_i_neg0, max_i_neg1
}
}
}