Interfacing (DSI, CSI, I2C, etc.) • Re: custom I2C behaves strangely...
I'd not noticed that you had set the delay on the i2c-gpio to 1usec, ie 1MHz.Yes the hardware block defaults to running at 100kHz, so any deficiency in the pullups on your bitbashed interface will be...
View ArticleCamera board • Re: Cannot Load Different Tuning Files on Multiple Cameras
Unfortunately it isn't possible to have different tuning files for the same model of camera (if they're running in the same process). This is a libcamera limitation which we have long wanted to...
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Camera board • Extracting Chroma Data From Luminance Mat Object
Long story short, I'm using Libcamera and a IMX219 from ArduCam and I'm trying to get the chroma data from the YUV420 frame.I've done the following so far:1) Set the pixel format to YUV420Code:...
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General discussion • Re: uninstalled Firefox for Chromium
Used to run FF on a 1GB RPi3B, just added 2GB swap, worked OK - I run it on my RPi4b/4GB & RPi400 OK too - I'm guessing you like to have lots of tabs open, I don't, & it works fine. Now using...
View ArticleMicroPython • Re: multithreading with Raspberry Pi Pico for model railroad
More information seems called for, so here it is.On one side of the layout we have Cogload Junction, which is where the lines to/from Taunton divide to Bristol or Westbury. There is a single track...
View ArticleTroubleshooting • Re: button stops listening further input after single press
Yes, we probably don't want any long-running code or long sleeps in the functions called by when_pressed / when_released.Statistics: Posted by neilgl — Wed Aug 07, 2024 6:24 pm
View ArticleRaspberry Pi 400 • No output on HDMI on Pi400
I have purchased a raspbery pi 400 in order to use a PI2SCART on a CRT monitor to watch old school anime.Since connecting that gadget to a scart CRT produced a flickering screen, I decided to first...
View ArticleGeneral discussion • Re: STICKY: PINN - An enhanced version of NOOBS.
Unfortunately, that would break many other ways of booting OSes, like using autoboot.txt, or conditional sections in config.txt, or booting directly from one OS to another, etc.I'm sorry if my initial...
View ArticleTroubleshooting • Re: Can I choose the wifi frequency?
Approaching things from "the other side" if you have "admin access" to your WiFi router and can assign different SSID's to the 2.4GHz a 5GHz bands that may be useful - I rarely run headless so I don't...
View ArticleRaspberry Pi 400 • Re: No output on HDMI on Pi400
Starting point is to connect to display and power, with no other peripherals and no sdcard.You should see a diagnostic display. If you do, what does the "display:" line show?Statistics: Posted by dom...
View ArticleGeneral • Re: Interrupt constantly fires weirdly
May i suggest trying an external pull-up resistor of 10kΩ? The internal pull-ups in the RP2040 are very weak. I can imagine that the electromagnetic pulse of the relay can trigger the interrupt...
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HATs and other add-ons • Could PyBricks be up and running on BuildHAT..
.. in 2024, as someone hoped 3 years ago? Has The Foundation ruled out this possibility, or is it still open?Or maybe make a simplified schematic public, and see what the community can do next? I'm...
View ArticleGeneral • Re: RP2040: multiple (6) GPIO interrupts
Well, there's actually a register (GPIO_OE) with one bit per pin, '1' for output, '0' for input,So we are agreed, the text I cited is incorrect, clearing output enable does not set it for input. It is...
View ArticleTroubleshooting • Re: Problems with Pi Pico SPI using the Arduino IDE
Have you add the library https://github.com/earlephilhower/ardui ... index.jsonAs described here - https://learn.adafruit.com/rp2040-ardui ... hower-core.I believe the function what was not found is...
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Beginners • Re: Raspberry pi 4+ HDMI enable
Hello,You were absolutely right . I booted without the sd and it gave me the ok to both HDMI video outputs . Regarding the boot update issue I have solved it by updating the EEPROM option in the...
View ArticleTroubleshooting • Re: USB Camera Detects but video won't work?
It would appear to me none of those are identifying as a webcam with v4l2 controlWhat /dev/videos show with ls /dev ?image_2024-08-08_145617575.pngIf you unplug the camera and try ls /dev what do you...
View ArticlePython • Re: Installing PyQt5-QtSql
First hit in google search shows how to use it https://www.geeksforgeeks.org/pyqt5-qtsql-python/Second hit is about how to install it https://stackoverflow.com/questions/496 ... yqt5-qtsqlStatistics:...
View ArticleTroubleshooting • Re: Adafruit_DHT wont show up in python
Almost all of the code that used to work in a Pi 4 will not work on a Pi 5 without a lot of modifications.Unless Adafruit has updated their stuff, their libraries will not work on the Pi 5.As for the...
View ArticleGeneral discussion • Re: RaspberryPi in ITX format // ExplainingComputers and...
Christopher Barnatt at the ExplainingComputers YouTube channel has a new video on the Radxa ROCK 5 in ITX form factor, here : https://www.youtube.com/watch?v=6C8QTf7GLfs&t=2sThe board looks really...
View ArticleTroubleshooting • Re: Raspberry Pi 5 USB 3.0 read performance is worse than...
I made a sample program that detects loss in real time and stops the trace. I still see a single discontinuity initially at 20M, but I had to increase the sample rate to 36 Msps to see subsequent...
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