Compute Module • Re: Flashing EMMC on CM4 taking this much memory?
A CM4 with onboard eMMC can boot from eMMC/PCIe - means an NVMe device connected to PCIe/USB. You will have to change the boot order to make that happen (not needed if the emac is empty/has no...
View ArticleTroubleshooting • Re: watchdog process restart
A systemd-aware service daemon sends a periodic sd_notify(3) "WATCHDOG=1" message to systemd, allowing systemd to detect a service which has hung but not crashed (theoretically, at least, it depends...
View ArticleGeneral discussion • Re: Official Foundation Pi 4 case has no holes for airflow?
Any suggestions on how we get it across that the Foundation is the educational side, and the Ltd is the bit that makes everything would be most welcome!!! It is frustrating that this is not yet well...
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General • Re: RP2350 Errata E9 - Pull-down lock-up
Mmm. But he has a point in my case - the only probes I have areRP3500A - it claims 10M input impedance and 500MHz bandwidth, but somehow I doubt both of those at the same time. I don't see any curves...
View ArticleBare metal, Assembly language • spurious inter-core mailbox interrupt on pi4
Hi all,I am experimenting with mailbox interrupts on the pi4.I have code that works but I get a spurious mailbox interrupt. I write to the set register, and in the interrupt handler I first read the...
View ArticleRaspberry Pi OS • Re: Qemu / Virtual Box on ARM?
An .iso file is a CD-ROM installer. A PiOS .img file is a pre-installed modified Debian installation with a kernel that is tailored for the RaspberryPi and does not boot and run a the QEMU/libvirt/KVM...
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Other programming languages • Re: JavaScript graph library, for embedding and...
It seems I need new "edge3()" that is able to draw edge along the 6 grey vertices positions as stereographic projection:Interesting how easy that seems to be.The center tangent through the geodesic...
View ArticleHATs and other add-ons • Re: Raspberry Pi 5 with Active Cooler and HAT
If in doubt use long stacking headers - i.e. https://thepihut.com/products/gpio-stac ... -pi-2-pi-3Statistics: Posted by aBUGSworstnightmare — Thu Sep 05, 2024 6:09 am
View ArticleCompute Module • Re: CM4 does not support serial port rates less than 1200 Baud
what about using a software UART (bit banged) for this?Statistics: Posted by aBUGSworstnightmare — Thu Sep 05, 2024 6:13 am
View ArticleRaspberry Pi OS • Re: Latest OS Lite bricks 20% of my SD cards
That sounds a lot like a counterfeit SD card, although you'd need to do a bit of testing to be sure of it. One style of counterfeit is to put a fake size on a smaller card, programming the card with...
View ArticleGeneral • Re: Non blocking data logging on dual core system
Thanks. I need to get out of the IDE straight-jacket. It's fine for blinking LEDs but becomes a handicap in more serious work. I've followed the excellent guide to setting up cmake to the point of...
View ArticleBare metal, Assembly language • Re: Boot process, add vendor data and vendor...
You could abuse the embedded bootloader config and add a small amount of data as (for example) a commented out base64 blob. I use that to store some per-device info for my http booting OS and have...
View ArticleGeneral • Re: RP2350 E9 bug - also for other GPIOs, e.g. SPI?
BTW: is just E9 bug related to Bank 0 pins only (all the user GPIOs), not Bank 1 (the USB DP/DM and QSPI signals for external flash memory)?Have you read the datasheet?"This issue presents under the...
View ArticleTroubleshooting • Re: Flickering Monitor
Are you sure your miniHDMI connectors are fully connected?Which resolutions/frame rate do you run your monitors at? Can you post a video which shows the effect?Statistics: Posted by...
View ArticleHATs and other add-ons • Re: Problem mounting NVMe drive on M.2 HAT+
that 'screw' is defective. Maybe try to use a file to remove the burrStatistics: Posted by aBUGSworstnightmare — Fri Sep 06, 2024 6:28 am
View ArticleMicroPython • Re: from UART in to array ?
the data can also contain a 0 "0h00" and want to save that too.Statistics: Posted by trixo — Fri Sep 06, 2024 6:32 am
View ArticleHATs and other add-ons • Re: pi5 pimoroni samsung pro 990 4t
pimoroni has of list of drives which they have tested with their HAT https://shop.pimoroni.com/products/nvme ... 3839448147Statistics: Posted by aBUGSworstnightmare — Fri Sep 06, 2024 6:33 am
View ArticleTroubleshooting • Re: Connecting a waveshare MAX m8Q GNSS to Rasp Pi 5
Using the UART is quite different to plugging in to USB though and with a HAT it will be UART so you did everything a serial (UART) user would do.(Hence why we asked originally) You can set gpsd up to...
View ArticleMicroPython • Re: pico w can't delete file or save any file
Bootsel mode isn't a real, general purpose mass storage device. It's for writing precompiled .uf2 files only. And for reading the couple of static files it provides. While it appears to the USB host...
View ArticleBeginners • Re: Connectting 220V to Raspberry PI GIO pins
The title of this post is misleading, as with the use of an isolated wall adapter 220V -> 3.3V the RPI will have no mains connection.Although the proposed solution is a complicated way to achieve...
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