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by jimmyken
Thu Nov 21, 2019 12:51 am
Forum: Bare metal, Assembly language
Topic: S.O.S signal using ARM assembly
Replies: 2
Views: 300

Re: S.O.S signal using ARM assembly

How about an active piezo buzzer module which can drive with 3.3 volts? GPIO can be performed as a switch for the module.
by jimmyken
Tue Sep 10, 2019 4:46 am
Forum: Troubleshooting
Topic: RPI4 stuck in booting
Replies: 2
Views: 151

Re: RPI4 stuck in booting

I'm afraid that the image you attached seems to be broken. Can you re-upload the image?
by jimmyken
Mon Sep 09, 2019 5:10 am
Forum: Troubleshooting
Topic: Random freeze on pi 4
Replies: 1
Views: 142

Re: Random freeze on pi 4

Hi!

Are you trying with Raspbian, a customized form of Debian for RasPi?
by jimmyken
Thu Sep 05, 2019 5:51 am
Forum: Troubleshooting
Topic: EXT4-fs error during rpi 3b+ boot
Replies: 1
Views: 138

Re: EXT4-fs error during rpi 3b+ boot

I have the same issue on my RasPi3B and checking this forum for the issue. Here is my post about this issue. https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=243696&p=1517592#p1517592 To solve this issue, several suggestions are watched in this forum. 1. Change the power source: Moderators su...
by jimmyken
Mon Aug 12, 2019 7:23 am
Forum: Troubleshooting
Topic: Noobs or Direct?
Replies: 11
Views: 557

Re: Noobs or Direct?

When it comes down to it there are several things that can lead to SD card corruption. power supply that is not suitable , you would see constant low volt warning on screen ( yellow lightening flash ) not shutting the pi down correctly , I.e. just pulling the power a mains supply that has repeated ...
by jimmyken
Tue Jul 02, 2019 1:27 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 564
Views: 201275

Re: Raspberry Pi 4 temperature

Ok searching around I found some other sources: Raspi.tv Power measurements Core Electronics Pi3 vs Pi4 benchmarks Raspberrypi.org Benchmarks All these sites, including raspberrypi.org, show the significant power usage increase between Pi 3 and Pi 4. Indicating this is normal and expected. So reall...
by jimmyken
Mon Jul 01, 2019 11:41 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 564
Views: 201275

Re: Raspberry Pi 4 temperature

jahboater wrote:
Mon Jul 01, 2019 11:14 am
If you are running Raspbian Lite headless, is it worth reducing gpu_freq or core_freq?

I read somewhere that on the Pi4, the core_freq doesnt affect the L2 cache speed.
I'd like to ask the all about these frequencies to Broadcom having right answers.
by jimmyken
Mon Jul 01, 2019 11:21 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 564
Views: 201275

Re: Raspberry Pi 4 temperature

Might be some mileage in dropping the ARM idle frequency, in config.txt arm_freq_min=300 or arm_freq_min=150. If anyone want to see if that makes much of a difference might be worth a go. Tiny performance hit as the CPU ramps up when started to load, but in my testing in the open air, seemed to get...
by jimmyken
Mon Jul 01, 2019 11:07 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 564
Views: 201275

Re: Raspberry Pi 4 temperature

When idle and using onDemand cpu governor the Pi 4 was running at just 600MHz already. Pi 4 implements the CPU governor for its variable clock speed. The CPU governor can refrain from using higher clock speed. It seems VC4's work. https://www.raspberrypi.org/documentation/configuration/config-txt/o...
by jimmyken
Mon Jul 01, 2019 10:08 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 564
Views: 201275

Re: Raspberry Pi 4 temperature

Things like around Pi 2: https://www.raspberrypi.org/forums/viewtopic.php?t=100239 Pi 2 runs 900Mhz in default and is changeable to 1000 Mhz through `sudo raspi-config`. Pi 4 may need a stage of the low speed clock for heat-treating to fit with cases which have no cooling system. And the history of ...
by jimmyken
Fri Jun 28, 2019 10:17 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 564
Views: 201275

Re: Raspberry Pi 4 temperature

Tokyo is reaching 31 degrees Celsius because of its renowned Summer today. Much cooler than most of mainland Europe then, where temperatures are expected to peak around 45°C today. The worst us poor Brits can expect is around 31°C tomorrow. Heard coming heat wave to Europe. Tokyo will get around 35...
by jimmyken
Fri Jun 28, 2019 7:05 am
Forum: Raspbian
Topic: 64bit Raspbian?
Replies: 13
Views: 2680

Re: 64bit Raspbian?

The RPF / RPT are not stupid or blissfully unaware, question of priorities: https://www.raspberrypi.org/forums/viewtopic.php?t=232684 Obviously. The Buster boot partition isn't 4x or so larger because the Buster kernel grew that much. Assumedly, a dual kernel Raspbian image with 32 bit userland is ...
by jimmyken
Fri Jun 28, 2019 6:45 am
Forum: Troubleshooting
Topic: Raspberry Pi 4 temperature
Replies: 564
Views: 201275

Re: Raspberry Pi 4 temperature

Tokyo is reaching 31 degrees Celsius because of its renowned Summer today.
I think of any heat sink and forced air cooler for powerful Raspberry Pi 4 8-)
by jimmyken
Thu Jun 27, 2019 5:06 am
Forum: Raspbian
Topic: 64bit Raspbian?
Replies: 13
Views: 2680

Re: 64bit Raspbian?

A roadmap would be nice. Roadmaps change. As do deadlines. Which are some of the reasons the RPF and RPT don't announce new products in advance. From the discussion of fellows, I'm sure that the new 64bit OS will comes officially. It possible that RPF and RPT can create the arm64 OS and Raspbian ca...
by jimmyken
Wed Jun 26, 2019 12:33 pm
Forum: Troubleshooting
Topic: Noobs or Direct?
Replies: 11
Views: 557

Re: Noobs or Direct?

When it comes down to it there are several things that can lead to SD card corruption. power supply that is not suitable , you would see constant low volt warning on screen ( yellow lightening flash ) not shutting the pi down correctly , I.e. just pulling the power a mains supply that has repeated ...
by jimmyken
Wed Jun 26, 2019 12:22 pm
Forum: Troubleshooting
Topic: Noobs or Direct?
Replies: 11
Views: 557

Re: Noobs or Direct?

SD cards may need more time to read if the address of data is far away from 0x00000000, depending on each SD card's architecture. That used to apply to hard disks with their head seek times, but not solid state devices like an SD card where that doesn't apply. Thanks, new SD cards has been optimize...
by jimmyken
Wed Jun 26, 2019 12:13 pm
Forum: Troubleshooting
Topic: Noobs or Direct?
Replies: 11
Views: 557

Re: Noobs or Direct?

Can't comment on noobs I prefer to just flash raspbian image directly to the SD card. only ever used a pi with noobs on it once and that was while I was helping a relative, it seemed to boot and run ok, once she became old enough to have an interest in fishing and boys the pi got forgotten. :lol: :...
by jimmyken
Wed Jun 26, 2019 12:07 pm
Forum: Troubleshooting
Topic: Noobs or Direct?
Replies: 11
Views: 557

Re: Noobs or Direct?

Gavinmc42 wrote:
Wed Jun 26, 2019 11:41 am
Only noobs use Noobs :D
You could try PINN.
Or just use the normal Raspbian, it is quicker to get running.
Thanks. In my experience, NOOBS is just fine to quickly install the OS.
I directly downloaded Raspbian (Buster), installed it to my formatted SD card through balenaEtcher in Windows.
by jimmyken
Wed Jun 26, 2019 11:59 am
Forum: Troubleshooting
Topic: Noobs or Direct?
Replies: 11
Views: 557

Re: Noobs or Direct?

No cant say I had any problems with stretch , unless the SD card became corrupted due to sudden power failure , and any OS will suffer that. Only other time I had a problem was due to an SD card reaching the end of life and would randomly fail, but would accept a re-flash ok. When I tested the SD c...
by jimmyken
Wed Jun 26, 2019 11:15 am
Forum: Troubleshooting
Topic: Noobs or Direct?
Replies: 11
Views: 557

Noobs or Direct?

I was using Raspbian (Stretch) that is installed through Noobs in my 32GB SD Card for RasPi3. This had frequently corrupted its file system in boot process. Raspbian (Buster) directly installed in the same 32GB SD Card has not yet corrupted its file system. These are in my experience. Did you guys h...
by jimmyken
Wed Jun 26, 2019 9:13 am
Forum: Raspbian
Topic: 64bit Raspbian?
Replies: 13
Views: 2680

Re: 64bit Raspbian?

Hi, all! Blessed Raspberry Pi 4 lunches. Its SoC, BCM2711 (I guess, de facto BCM2838?) has a powerful 64bit CPU, ranging to the application for automotive. Raspbian Buster also releases. I downloaded Buster and installed it to my SD Card using balenaEtcher on Windows. It works fine on my Raspberry ...
by jimmyken
Wed Jun 26, 2019 8:38 am
Forum: Raspbian
Topic: 64bit Raspbian?
Replies: 13
Views: 2680

64bit Raspbian?

Hi, all! Blessed Raspberry Pi 4 lunches. Its SoC, BCM2711 (I guess, de facto BCM2838?) has a powerful 64bit CPU, ranging to the application for automotive. Raspbian Buster also releases. I downloaded Buster and installed it to my SD Card using balenaEtcher on Windows. It works fine on my Raspberry P...
by jimmyken
Sat Apr 21, 2018 10:07 am
Forum: Off topic discussion
Topic: Let's Talk About a Future Simple RasPi!
Replies: 16
Views: 3408

Re: Let's Talk About a Future Simple RasPi!

Wow, the good idea from Element14! It has possible removal of RF Module if a nation don't approve this. Pi0W without WiFi and Bluetooth is Pi0. Pi3B without ditto is Pi2B. No radio-less Pi3B+ yet, but since you said BCM2835 was adequate I'm sure a Pi2B wiould do. So where's the gap in the market? A...
by jimmyken
Sat Apr 21, 2018 10:00 am
Forum: Off topic discussion
Topic: Let's Talk About a Future Simple RasPi!
Replies: 16
Views: 3408

Re: Let's Talk About a Future Simple RasPi!

You can not buy the BCM2835 / 36 / 37... Though you can ask Element14 to create a redesigned Raspberry Pi in major quantities: https://www.element14.com/community/docs/DOC-76955/l/raspberry-pi-customization-service Regards Industrial use that was initially by request, hence the CM family, and still...
by jimmyken
Sat Apr 21, 2018 9:57 am
Forum: Off topic discussion
Topic: Let's Talk About a Future Simple RasPi!
Replies: 16
Views: 3408

Re: Let's Talk About a Future Simple RasPi!

After using the camera on some A+'s and B+ style boards again, with SenseHAT sat on them I would like the damn camera connector to be moved to the DSI position so it's at the edge of the board and not in the middle going through HATs and needing to take them off if it pops out of it slot or you nee...

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