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ralphjy

Happy St. Patrick's Day

Posted by ralphjy Top Member Mar 17, 2021
Happy St. Patrick's Day to the Element14 Community!   I was wondering if there was anything that I could do quickly with something that was green. The Pi Pico came to mind immediately, but serendipity won the day.   When I arrived home after my morning walk with the granddog, I found a Fedex package on my doorstep.  It was an Omron Sensor Evaluation Board 2CIE-EV that I had won in an Omron giveaway contest.  And it was also green .   There are 3 different versions of ...
ralphjy

Happy Pico Pi Day

Posted by ralphjy Top Member Mar 14, 2021
I thought I shouldn't let Pi Day go by without doing something on an RPi, so I decided that since I've been using the C/C++ SDK with the RP2040 that it would be appropriate to try something on the Pi Pico with MicroPython and the Python SDK.  I'm using the RPi400 as the development host, so I'm actually using 2 Pis - bonus points...   Loading MicroPython was easy since there is a UF2 file provided (https://www.raspberrypi.org/documentation/rp2040/getting-started/static/f70cc2e37832cd ...
Normally, I travel away from home 6-8 times a year.  Almost exactly a year ago, I returned home from Hawaii on the same day that my mother's assisted living facility on Oahu went into lockdown due to the pandemic.  I haven't traveled to Hawaii or anywhere else since then.  I'm hoping to be able to get back to Hawaii to visit her again after I get vaccinated.  Care facilities in Hawaii have just started to allow limited visitation.   A side effect of not traveling is tha ...
I recently accidentally discovered a part of SparkFun that I hadn't encountered before - SparkX, their line of experimental products.   I purchased a MicroMod Big Display Carrier Board https://www.sparkfun.com/products/17718  to try out bitbanged DVI using the RP2040 RP2040 HDMI Display and didn't notice that I was buying a SparkX product.  The big giveaway is that the PCB color is black rather than the red of their standard products.  And it is clearly labeled.   I've ...
I'm not sure why it never occurred to me that you could do incremental flash loading using UF2 files.  Seems relatively obvious since the file includes the load address, but I guess I've never had occasion to do it before.   In my previous blog RP2040 HDMI Display , I was trying out a bitbanged DVI interface.  One of the examples "vista" is a full-res image viewer (project vista).  When I tried the example, all I got was a white screen.  I mentioned this to Luke Wren an ...
ralphjy

RP2040 HDMI Display

Posted by ralphjy Top Member Mar 11, 2021
This falls in the category of buying and trying something just to see it work.   I first got interested in microcontroller generated video displays back in the late 70s when I had a KIM-1 "single-board computer" which used a 6502 microprocessor (like the Apple 2) and only had a numeric keypad for input and 6 seven segment LEDs for display.  Don Lancaster had developed a TV Typewriter project that allowed outputting characters to a video monitor using processor code and some external c ...