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381 Commits

Author SHA1 Message Date
5c3b759d0c PwmSummary: Don't show max PWM values
Putting the maximum in PwmSummary has little use - the maximum never
changes throughout the runtime of the firmware and can be replaced by
documentation elsewhere.
2024-10-07 10:41:31 +08:00
6224486662 Show polarity in pwm command 2024-09-30 17:36:50 +08:00
32bd49b258 Add a command to reverse the output polarity
Effectively flips all values related to the directionality of current
through the TEC, including current maximums. The reversed status is
stored in the flash store and will be loaded on reset once saved.

The command is "pwm <ch> polarity <normal/reversed>", where the "normal"
polarity is indicated by the front panel markings.

This is needed for IDC cable connections to the Sinara 5432 DAC
"Zotino", since the TEC pins of the 10-pin connector on the Thermostat
and Zotino have opposite polarities.
2024-09-30 17:36:47 +08:00
ad54842c43 Fix wrong current limit duty cycle calculation
- prev commit assumed setting 3.3V -> 3A current limit which is wrong
- Please refer to the MAX1968 datasheet for the duty cycle
calculation equation
2024-09-25 17:20:29 +08:00
b336c4f993 Remove report mode
As the report mode command breaks the send-receive architecture model of
the command interface, and is deemed an anti-feature, making clients
difficult to write, remove it from the firmware entirely.
2024-09-25 17:19:34 +08:00
680193b34b Fix incorrect dac calibration algo
- Fix abnormally long calibration time
2024-09-20 21:21:14 +08:00
ae4bea0c8a gitignore: Ignore .bin files and __pycache__ 2024-09-19 10:08:58 +08:00
1f2de942e4 flake: Add rlwrap to devShell 2024-09-19 10:06:45 +08:00
1041d3ecbb Improve the VREF calibration routine
* Fix wrong calibration of VREF on startup. Caused new v2.2.2 boards to
wrongly calibrate the zero-point to ~2.2 V instead of 1.5 V.

* Fix bootloop on some boards.

* Adjust watchdog interval accordingly.
2024-09-16 18:14:47 +08:00
c6040899dd ItecPin -> ITecPin 2024-08-12 13:02:22 +08:00
9d89104f50 README: Fix command to make firmware BIN ()
Co-authored-by: atse <atse@m-labs.hk>
Co-committed-by: atse <atse@m-labs.hk>
2024-08-07 18:22:48 +08:00
136c7a0b52 Calculate current_abs_max_tec_i from all channels
Instead of picking channels 0 and 1. Helps to generalise for more than 2
channels.
2024-08-07 16:14:28 +08:00
5000cae1b1 Grammar fixes 2024-08-07 16:09:30 +08:00
78ec77509f flake: Install LLVM in devShell too
So that developers can use `llvm-objcopy` in their devShells as well.
2024-08-07 16:06:19 +08:00
52aa3890c1 Update nix repos 2024-08-06 13:38:58 +08:00
1ae6a6fdd4 flake: More concise devShell
No need for C compiler in development shell + use "packages" to
explicitly refer to devShell packages
2024-08-06 11:14:25 +08:00
7333d2cea5 flake: Don't use deprecated flake output schemas 2024-08-06 11:09:51 +08:00
44e9130010 Use oxalica's rust-overlay
Follow ARTIQ, and in this project lets us include the version number
directly in flake.nix instead of linking to the toml file of a specific
release date, as we use stable Rust.

Also, from nixpkgs manual:
    both oxalica's overlay and fenix better integrate with nix and cache
    optimizations. Because of this and ergonomics, either of those
    community projects should be preferred to the Mozilla's Rust overlay
    (nixpkgs-mozilla).
2024-06-27 12:42:00 +08:00
5b0c6f7018 Save i_set into ChannelConfig 2024-05-18 10:50:54 +08:00
1007982b48 clamp TEC settings to a valid & design specs range
- Not respecting the design specs can cause hardware to get stuck in unrecoverable state
2024-05-10 15:17:46 +08:00
925601f4f5 rm pid setpoint change kick 2024-05-10 10:29:08 +08:00
8c1cb3117c README: Add notes on i_tec & tec_ireadouts 2024-05-02 17:48:47 +08:00
1fcfe41a63 Add averaging filter on the pin_adc readings
- Adapted from Kirdy Firmware
- Can reduce the i_tec readings noise dispersion
2024-05-02 16:49:55 +08:00
9fce19a418 Revert "Disable feedback current readout on flawed HW Revs"
This reverts commit ae3d8b51d4.
2024-05-02 14:38:40 +08:00
00d5feaa8d Limit i_set within range of MAX1968 chip 2024-04-24 18:05:20 +08:00
09be55e12a Don't load REF pin of MAX1968 chip on HWRevs < 3.0
The REF pin of the MAX1968 on hardware revisions v2.x is missing a
buffer, loading the pin on every CPU ADC read. Avoid reading from it and
leave the pin floating on affected hardware revisions, and return the
nominal 1.5V instead.
2024-04-03 16:32:57 +08:00
76547be90a i_tec -> i_set
i_tec is reserved for the voltage signal coming out of the MAX1968 chip
for now.
2024-02-14 17:27:12 +08:00
8b975e656e Stop i_set from fluctuating in every report
i_set is a user-provided value that shouldn't fluctuate with every VREF
measurement. Storing i_set as channel state is the simplest way to avoid
that.
2024-02-14 17:21:39 +08:00
ae3d8b51d4 Disable feedback current readout on flawed HW Revs
Thermostats v2.2 and below have a noisy and offset feedback current
`tec_i` caused by missing hardware on 2 MAX1968 TEC driver pins:

1. A missing RC filter on the ITEC pin that would have isolated CPU
sampling pulses from the signal; and
2. Some missing buffering on the VREF pin that would have avoided
loading the VREF signal, preventing voltage drops from the nominal 1.5V.

Since the resulting signal `tec_i` derived from these two signals can
have an error of around +/- 100mA, and readback may affect the stability
performance of the Thermostat, disable current readback entirely on
affected hardware revisions for now.

See https://github.com/sinara-hw/Thermostat/issues/117 and
https://github.com/sinara-hw/Thermostat/issues/120.

On hardware revisions v3.x and above, this would be fixed.
2024-01-31 12:12:22 +08:00
17edae44fb README: Proofread fan control documentation 2024-01-30 12:43:19 +08:00
03b4561142 Refactor current_abs_max_tec_i to use uom 2024-01-30 11:41:52 +08:00
631a10938d README: Remove VREF 2024-01-26 17:00:27 +08:00
6cd6a6a2c2 Fix warning '...not permit being left uninit..d'
Put SocketState initialisation logic in new. This avoids using an unsafe
and unnerving MaybeUninit::uninit().assume_init() to initialise an
array, which the compiler yells at since it causes undefined behavior.
2024-01-17 15:29:56 +08:00
b93e2fbb7b Update rust edition 2024-01-17 15:29:56 +08:00
76b95f66e0 Use latest working stable rust 2024-01-17 15:29:41 +08:00
8008870bc1 Switch panic_handler to panic_halt
Move away from panic_abort as it uses intrinsics, which is nightly only.
2024-01-17 15:29:15 +08:00
7646ff9037 README: Avoid deprecated OpenOCD ST-Link config
The config file interface/stlink-v2-1.cfg is deprecated, and the warning
message encourages the switch to interface/stlink.cfg. Do accordingly.
2024-01-04 12:44:52 +08:00
6f81a63d12 Remove unused LED parameters 2023-09-20 15:51:37 +08:00
78012f6fdd flake: Use rust from manifest, not from pkgs
Fix the rustPlatform deprecation warnings properly.
2023-09-20 11:29:38 +08:00
bb4f43fe1c Remove stale reference to channel_state vref 2023-08-22 17:16:25 +08:00
9df0fe406f Remove VREF in reports
Since VREF is an implementation detail, there shouldn't be a need to
include it in reports.

The ChannelState vref is removed along with it as its only use was to
save VREF measurements for later reporting.
2023-08-22 11:40:42 +08:00
5ba74c6d9b README: Correct expected TEC polarity
Adhere to the general convention of TECs cooling down with positive
voltages.
2023-08-15 16:37:51 +08:00
6f0acc73b8 Update LED L3 for PID status on every cycle
Check if PID is engaged on any channel every cycle, and match the status
with LED L3.
2023-08-10 16:43:19 +08:00
f29e86310d Update nix repos 2023-08-09 11:23:32 +08:00
b04a61c414 Turn off LED L3 only when all channels have no PID
Change the behaviour of LED L3 to turn off only when all channels have
PID disengaged, as opposed to when any channel disengages PID.

Otherwise, when disengaging PID on a Thermostat that has had both
channels engaged in PID, the LED would turn off, even when PID is still
engaged on the other channel.

This lets the LED better reflect the status of the Thermostat as a
whole, as it would stay on as long as PID is engaged on at least one
channel.
2023-08-07 16:09:54 +08:00
cd680dd6cd README: Correct unit of time in reports 2023-07-20 17:45:16 +08:00
e3e3237d2f Emit warning when current/voltage limits are near zero
Signed-off-by: Egor Savkin <es@m-labs.hk>
2023-03-23 16:58:05 +08:00
570c0324b3 implement support for fan PWM
Co-authored-by: Egor Savkin <es@m-labs.hk>
Co-committed-by: Egor Savkin <es@m-labs.hk>
2023-03-22 17:15:49 +08:00
5688b2f1bb flake: update stm32-eth sha256 hash 2022-03-02 17:21:17 +08:00
1b2f2f3888 update code to use stm32f4xx-hal 0.10.1 API 2022-03-02 17:21:17 +08:00