#Pi pico

[spamhamandeggs]

> writing optimized ARM > unrolled loop body is three instructions > still trying to figure out how to make it even faster

[rollingrockstar]

ok

[ui-alcoholic]

clockwork PicoCalc

clockwork PicoCalc Back to Basics, rediscover the Golden Age of Computing

Code in BASIC, explore the magic of Lisp, taste the elegance of Unix, play retro games and digital music all in just 260KB memory. Infinite possibilities, inspired by the genius in you!

ClockworkPi v2.0 mainboard

Raspberry Pi Pico 1 H Core module (ARM32-bit Dual-core Cortex M0+, 264KB RAM, 2MB flash)

320x320 4-inch IPS screen (SPI interface)

Ultra-portable QWERTY Backlit keyboard on board (I2C interface)

Dual speaker

ABS plastic shell & 2.5mm Hex key

Tempered glass cover

32GB high-speed SD-card with optimized BASIC firmware

source: clockworkpi.com

[avaquava250]

Hi, I just got into tech (actually 1 year in but I still feel like I don't know anything).

I learnt python, R, SQL, Tableau and concepts in Data Structures, Algorithms.

[Just the Basic level of the listed.]

But I can't write my own programs on python or create anything.

I was hella impressed by your microprocessor project, and when I took up tech (ai and data science) I assumed I would do something like that or at least code.

Now, I am just venting but where do I start, how do I make projects what are some interesting projects, what should I learn? A lot of my seniors tell me to have a wide range of knowledge like focus on one thing by depth but add other things. For example: you can study data analytics in depth but have some knowledge in ethical hacking and web development etc. Like an all rounder.

Wow ok a lot to unpack here, I'll get started

Lots of places recommend that you start with Arduino, as there are a lot of good tutorials out there. I somewhat disagree

I think that raspberry pi is better because it's usually a lot cheaper to buy the stuff you want to play around with

But an even cooler way to do it, go to wokwi.com and start a project on a Raspberry Pi Pico (make sure it's the micropython version) and then you can get started there

Google something like "Blink led with Pi Pico micropython" and there will be a tutorial or two

Then, once you've played around for a while you can buy a Pi Pico for very little money and see your stuff work irl!

If you need any more help or have any questions, feel free to DM me and I'll see what I can do

[rx75-2]

LED control system in progress!!!

[arachnid-party]

think i fucked up my pico

[vaporwave-galactica-sys]

Oh baby.. I'm sorry, you're safe now..

[trainsinanime]

PSA

If you want to use a Raspberry Pi Pico as a debug probe to program another Raspberry Pi Pico without the annoying BOOTSEL dance, make sure that when you run CMake on the debugprobe firmware (in the picoprobe repository), you pass DEBUG_ON_PICO=ON as option. As in,

cmake -DDEBUG_ON_PICO=ON ..

This flag is described in the Readme of that repository (also note that the repository and tool have been renamed debugprobe from picoprobe), but it's notably missing from Appendix A of the Getting started with Raspberry Pi Pico guide. That guide is probably older, before the firmware was split and renamed like that, and nobody has bothered to update it yet.

If you don't do that, the firmware will expect the SWDIO and SWCLK data on different pins than what the instructions say, and you will find yourself spending hours checking the cable connections because you keep getting "Error: Failed to connect multidrop rp2040.dap0" errors in openocd. Ask me how I know.

(Also, fuck Raspberry Pi for making so much of their otherwise really good documentation PDFs. There are several places where you need to cross-reference things, and if it were HTML, the navigation between the sections would be so much easier.)

Other tip, while we're here: Install ninja (with brew install or apt install), then when doing the cmake generating step, pass "-G Ninja" in addition. Then build by just typing "ninja" instead of "make -j4" or whatever. It's a little extra typing but it is faster and better at utilising many cores on your host computer.

[the-uh-embre]

so excited to wire my diy boxx 2morrow <3

kind of anxious about measuring the red wires and whether or not i should tape the microcontroller to the box or let it just hang there so that vibrations and jostling don't mess w the chip as much. wires should be fine though since i bought stranded ones.

this is what it looks like outside. ive made myself a little guide to make it easier soldering each button to the default pinhole set in the firmware, but again anxious about that part. i'll defo (probably) have it in the center to save on wire. the ground though, that part i found pretty fun on my stream deck.

thing im most anxious abt is the usb wire. im hoping i can find one lying around that i can leave inside to have a dedicated wire since i dont have a breakout. but if it comes to it, i can share the one i use for my drawing tablet. unplugging its gonna be a bitch though.

hope in the future i can also wire a gamecube usb, so i can play on my wii or at locals that use gamecubes.

[spamhamandeggs]

Project isn't working

Connect oscilloscope to check if it's generating the signal you expect

See a signal that makes absolutely no sense

Now you're even more confused than before

[sb-components]

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[drdnar]

A Color LCD (part 1)

Many years ago, I pulled an LCD out of a GPS unit from the days before cars and smartphones having navigation features. This LCD is a color LCD with a backlight. It’s a very different technology, and much more challenging to interface to. I can’t even find a proper datasheet for the module.

There are datasheets available for modules with similar part numbers. Based on the circuitry in the above picture, this looks like the closest pinout:

B&W LCD modules usually have a built-in charge pump to generate their needed voltages. Unfortunately, the datasheet also says this module needs those voltages supplied externally, and they’re a bit weird.

VDH: +8.3–+8.7 V @ 3.3 mA

VGH: +16.2–+17.0 V @ 0.23 mA

VGL: −8.35–−8.0 V @ 0.17 mA

VCC: +2.5–+3.3 V @ 0.22 mA (this is actually a normal voltage)

Fortunately, I don’t have to design and build a boost circuit myself; you can Just Buy voltage boost modules easily from many places. Getting a module to generate that negative voltage, however, is a lot harder. But it turns out that charge pump chips are A Thing you can Just Buy on Digikey. Sadly, charge pump chips tend to have fairly low output current capability, so while charge pumps could produce the high voltage for the backlight, it would require several and be kind of awkward.

So last week and this week, I finally sat down and learned enough about PIO on the Pi Pico to produce suitable timing signals for the module.

Great! I have a power circuit, I have logic signals, I have a suitable connector, now to see if I can display a picture. Well, one problem: I haven’t built something to hold the LCD. I don’t have a 3D printer, nor any CAD skills, so tonight’s project is to design in Adobe Illustrator a case for the module made of cardstock.

[someone-took-meep]

Wow, I can't believe a game in the 2020s doesn't have proper SODC cleaning, hitbox is cheatbox once again!

If you hold both the left and right movement buttons at the same time during the driving segment, the car you control will become incapable of hitting the other cars.

[bitstream24]

Combining CAN Bus and Microcontroller Power: The CANPico V2 by Copperhill Technologies

Discover the CANPico V2 from Copperhill Technologies – a powerful Raspberry Pi Pico WH board with built-in CAN Bus support for automotive, industrial, and IoT applications. Compact, reliable, and easy to use.

[rx75-2]

The programming and wiring is finished!!

Now I just have to make a box