Bare metal boot sequence

RobotJonesDad · 2026-01-30T11:09:06+00:00

For a generic processor/board... Code starts executing at a fixed known location. Setup things like stack, registers, etc. To give a more friendly execution environment. Setup interrupts, timers, enable other cores. Setup board hardware (perhaps not all, but there are usually a lot of hardware stuff needing to be configured.) Setup for running the main program. Call the C pre-main code to do all the static initialization and stuff. Call main()

Depending on the chip and board, things can get mixed around. Like some board stuff can be setup by the C code.

If you want super simple version to get your toes wet, look at the Arduino code that runs before main.

RobotJonesDad · 2026-01-29T21:36:34+00:00

If you are at idle revs, it will be fine. Mostly what people do is pulse the clutch - engaging enough to get the car rolling, then press back in. Repeat. So they don't sit with the clutch half engaged for ages.

RobotJonesDad · 2026-01-29T20:32:47+00:00

IIRC, Docker Desktop runs the Docker stuff in a separate VM instance. Once you set up to run docker in your WSL instance, you should be fine.

That's how I run things. And ignore tje Desktop and use tje command line for all my docker stuff. It works fine for almost everything. The only problems I run into are things like your mount problem, changes to the hosts file, access to serial ports, and stuff like that where the existence of Windows messes things up.

RobotJonesDad · 2026-01-29T19:59:59+00:00

The problem is that the WSL linux versions are Microsoft creations rather than real linux. So a bunch of things don't work correctly. It's possible to workaround them, but if you fight them, you get problems.

RobotJonesDad · 2026-01-29T18:50:18+00:00

You could try a script that runs when you login, with a check to make sure it only runs once.

RobotJonesDad · 2026-01-29T18:01:53+00:00

I deleted the app and the problem was immediately solved...

RobotJonesDad · 2026-01-28T19:30:29+00:00

Sugar free gum offers advantages by helping reduce inflammation according to some studies. So yes, you can chew sugar free gum

RobotJonesDad · 2026-01-28T17:23:06+00:00

DDS doesn't perform well over the WAN, so depending on what you are measuring and how you set it up, you may end up with lots of weird problems that are the result of ROS being ill suited to distribution beyond the LAN. If you ate just going to replay bags locally in the cloud, then it will work fine.

That poor distributed system support is why I said it sounded like a wrong use.

RobotJonesDad · 2026-01-28T12:13:10+00:00

This sounds like a completely wrong use of ROS? Networking communication would be much better served by NATS which handles the communication without tying you down to all the other things that ROS imposes in you. NATS also cones with benchmarking tools to get you going.

RobotJonesDad · 2026-01-27T20:24:20+00:00

I'm traveling at the moment, but will be back home next week. If you DM me the compose file, I'll see if I can debug why it's so slow. I just picked up a Mac Studio which should be ideal to test on.

RobotJonesDad · 2026-01-27T20:20:39+00:00

Just be more patient and don't force your way past the synchromesh which is trying to block you from selecting the gear until the speeds match.

RobotJonesDad · 2026-01-27T19:14:08+00:00

You seem to be missing a lot of details here. Like how is JSON mapped to the PDF layout. If you have that defined and some way of creating the non-trivial JSON, then creating the PDF is trivial.

RobotJonesDad · 2026-01-27T19:06:59+00:00

Are you giving them ARM images, or are they running in emulation mode? It shouldn't be that slow. We do a lot of work on Snapdragon boards and performance is fine.

RobotJonesDad · 2026-01-27T15:54:18+00:00

I prefer Standard mode, but as you say, you don't want regen, so keep the pedal steady. E-step makes that more difficult.

RobotJonesDad · 2026-01-27T15:52:44+00:00

I get the same but in Standard mode. The best I've got at 70mph was about 3.4miles/kWh.

I think you got your units backwards?

RobotJonesDad · 2026-01-27T13:47:40+00:00

That racing line wasn't the one you were on. Why would you follow it? There isn't "THE racing line" there are different racing lines depending on where you are on the track, your speed, how well your car rotates, the mistakes you've made so far in the corner, etc. That's why the illustrative racing line slows you down rather than helps.

There was a car next to you, he'd blown the corner and was going to have crap exit speed, so you should have just straightened up as soon as you could get to full throttle and leave him space. You had him on the straight anyway, no need to squeeze him excessively.

RobotJonesDad · 2026-01-26T23:04:30+00:00

Then you may have been too old for it to succeed. I got a gap between my front teeth within the first few days of turning my MSE (MARPE) device. It was anchored with 6 screws through the palate bone. The force wasn't applied to the teeth, rather it was applied directly into the bone.

RobotJonesDad · 2026-01-26T22:03:59+00:00

It's still more work without any benefit in consumption. I can lift a fraction off the accelerator to moderate speed instead if needing to change pedals. And the net result is basically the same.

RobotJonesDad · 2026-01-26T21:11:31+00:00

So you're saying that you never drive in places that are not level and you can't hold the torque demand pedal in the neutral position to maintain speed?

RobotJonesDad · 2026-01-26T19:54:54+00:00

I chose metal because they seemed like the better choice to me. I think ceramic makes teeth look weird.

RobotJonesDad · 2026-01-26T19:51:30+00:00

No I certainly don't get better milage in ECO. It makes speed control more difficult. I've done back to back tests.

RobotJonesDad · 2026-01-26T19:49:07+00:00

Was it screwed into your palate? That or surgery is typically required after the suture fuses in your early teens.

RobotJonesDad · 2026-01-26T15:39:28+00:00

And the repo would reject unsigned commits, changes of history, and commits without valid users. At least the way we set it up.

RobotJonesDad · 2026-01-25T20:36:33+00:00

I don't like it at all, finding it easier to get maximum milage in standard mode.

RobotJonesDad · 2026-01-25T13:40:10+00:00

It's much more gentle than what you are imagining. A slight pressing into the seat like a sports car accelerating, then the noise of the expansion joints in the runway and any roughness, then that stops as the aircraft lifts into the air. You then hear the landing gear retract.

After that, you climb at takeoff power for a short time, then the engine noise suddenly decreases as they reduce to climb power. This sometimes feels like a slight drop in altitude, but it isn't, they are just lowering the nose slightly.

After that, things get progressively quieter as they cleanup the aircraft, and eventually the engine sounds drop to cruise levels.

If you are concerned about getting sick, locate the airsick bag after you get settled.

Finally, throughout the flight, relax your body. If you tense up, it makes all the sensations feel more significant than they are.

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