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Going in circles without a real-time clock

rachelbythebay.com

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Re: Going in circles without a real-time clock

#151

Post by gorkish »

eternityforest wrote: post #143
gorkish wrote: post #128

The Pi ecosystem is coming apart at the seams. Talk about falling off a pedestal. By the time you buy everything you need to make a Pi 5 even remotely usable and reliable today, you'll have spent as much as a small form factor PC. What do you need? 1. Special power supply - Yes, it's USB-C but it requires a high amperage 5V supply instead of accepting a higher voltage like most USB-C stuff 2. Active cooler - Pi 5 thr…

They seem to be obsessed with desktops, and ultra high performance homelab NASes. They could have just use any old less powerful chip, like, whatever has at least 3B performance is fine, and used the money saved for stuff we actually need. Maybe ditch those awful micro HDMIs, it's kind of a nasty connector and USB C exists. Onboard lithium charging is a few cents. Better yet, onboard LTO charging, but it seems nobody…

> They seem to be obsessed with desktops, and ultra high performance homelab NASes.

I don't know how you reach that conclusion; the network connectivity of pi's suck (especially pi5) and out of the box they do not support any traditional storage except for a couple of external usb drives.

The use as a low cost desktop is a primary mission statement of theirs, so I don't really read that part as a criticism though. I think it's probably the only thing it really does well.

Agree on your other points though. Other vendors have made lots of headway in the SBC markets in the years that Pi hasn't been able to ship product. I'm sorry in a way that they have not achieved their lofty goals, but in another way I'm not sorry because they really have been fucking it up bad for the last few years.

Re: Going in circles without a real-time clock

#152

Post by Dylan16807 »

gorkish wrote: post #150
Dylan16807 wrote: post #149

Earlier quoted context omitted.

I thought the boot config was just an override. The things I've been searching in the last few minutes suggest that the Pi can negotiate 5A but only if the power supply explicitly offers it as a PDO, which almost nothing does. But even if that's right, it's almost as bad as not doing PD at all. Edit: The documentation states "If the Raspberry Pi 5 firmware detects a supported 5A-capable supply, it increases the USB c…

That may indeed be correct at least in some circumstances; maybe it at least works with some capability of the offical supply. In my experience I have had to use usb_max_current_enable=1 and PSU_MAX_CURRENT=5000 to get it to shut up and work. Here's the thing though; the simple fact that we have to even have this discussion because the Rpi5 continues to be super damn weird is enough evidence for me that the platform…

Agreed, I'm very annoyed it doesn't support PPS. A whole host of issues made me buy a small pc instead recently and the price difference was negligible.

Re: Going in circles without a real-time clock

#153

Post by BlueTemplar »

gorkish wrote: post #128

The Pi ecosystem is coming apart at the seams. Talk about falling off a pedestal. By the time you buy everything you need to make a Pi 5 even remotely usable and reliable today, you'll have spent as much as a small form factor PC. What do you need? 1. Special power supply - Yes, it's USB-C but it requires a high amperage 5V supply instead of accepting a higher voltage like most USB-C stuff 2. Active cooler - Pi 5 thr…

What is "high" amperage here ?

I find it hard to believe that it can be worse than RPi 3, which could try to draw up to 15W => 3A under the highest loads, while USB 2 could officially only go up to 2.5 W = 0.5A at 5V, resulting in countless corrupted SD cards. (15 W being the minimum maximum for USB C.)

Re: Going in circles without a real-time clock

#154

Post by BlueTemplar »

bityard wrote: post #127
shawabawa3 wrote: post #45

I've personally had so many issues with SD card corruption on raspberry pi's that I've decided it was a mistake to even allow SD card disks I only ever use USB storage on my pi's now and not had a single issue since

Most SD cards for sale are not suitable for write-intensive random-access workloads. However, they do make SD cards that are intended for this, I've had very good luck with cards marked "high-endurance." They cost more, but they work. I've always been amazed that the Foundation never mandated the use of validated brands or types of SD cards. Not that it matters much to me, I've had to retire all of my Pis earlier tha…

My money is on the use of a single USB 2 port for power for both of these issues :

https://news.ycombinator.com/item?id=40024355

Re: Going in circles without a real-time clock

#155

Post by M95D »

michaelt wrote: post #71
M95D wrote: post #55

Earlier quoted context omitted.

If the user has issues with all of that, then RPi is not the rigth tool for them.

Ah yes the Raspberry Pi, a charitable project intended to get young kids into coding, which comes with kid-friendly projects, brightly coloured beginners' guide books, and pre-installed with Scratch, is truly only a tool for experienced professionals. /s

Yes, if he/she was using it for that (kid projects, Scratch, etc.) it would have been the right tool. Maybe it's because she skipped all those steps in his/her IT education is the reason he/she is having troubles now.

I learned about the devicetree on a RPi too, but I didn't complain about it in a blog. When I bought my first RPi I expected to encounter problems and learn a lot from solving them. In fact, I expected it to be much much worse - so much worse that I even bought the RTC module even before the RPi arrived in the mail. Why didn't he/she think of that? It's because he/she is lacking the basics, the kid project with gpio leds and i2c sensors.

Re: Going in circles without a real-time clock

#156

Post by gorkish »

tdeck wrote: post #141
gorkish wrote: post #128

The Pi ecosystem is coming apart at the seams. Talk about falling off a pedestal. By the time you buy everything you need to make a Pi 5 even remotely usable and reliable today, you'll have spent as much as a small form factor PC. What do you need? 1. Special power supply - Yes, it's USB-C but it requires a high amperage 5V supply instead of accepting a higher voltage like most USB-C stuff 2. Active cooler - Pi 5 thr…

The raspberry pi is still a great and easy way to control GPIO lines. IMO that's it's strength, it was never a particularly capable desktop computer or server for any kind of load. The raspberry pi was underpowered compared to a "real computer" when it came out and that's still fine for many applications.

A hundred and fifty bucks to control some non 5v tolerant gpio pins; no it’s not actually great at that. The RP2040 is great at that.

Re: Going in circles without a real-time clock

#157

Post by gorkish »

BlueTemplar wrote: post #153
gorkish wrote: post #128

The Pi ecosystem is coming apart at the seams. Talk about falling off a pedestal. By the time you buy everything you need to make a Pi 5 even remotely usable and reliable today, you'll have spent as much as a small form factor PC. What do you need? 1. Special power supply - Yes, it's USB-C but it requires a high amperage 5V supply instead of accepting a higher voltage like most USB-C stuff 2. Active cooler - Pi 5 thr…

What is "high" amperage here ? I find it hard to believe that it can be worse than RPi 3, which could try to draw up to 15W => 3A under the highest loads, while USB 2 could officially only go up to 2.5 W = 0.5A at 5V, resulting in countless corrupted SD cards. (15 W being the minimum maximum for USB C.)

5V 5A. Buck converter? Never heard of it apparently
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