Blinkmaxxing

Hii, I received a package a few days ago and tried the onboard RP2350 with some NeoPixel code,
firePI neopixel demo
I then tried sending some bits back and forth with the FPGA after not being able to figure out how to make it work for a while.
I also made my own iCE40 flasher, utilizing an external Raspberry Pi Pico (thanks to ChatGPT for the SPI instructions for the flash chip).
I made my own Verilog shell and Makefiles, and made a small blinky program.
(This is my first time writing Verilog for an FPGA!)

Final touches

Added mounting holes, I also added a user-button and a few LEDs, switched the old oscillator for a new one (a bit bigger, is a bit better, and also lowers my pcb price).

smol update

Fellow readers, we have reached the end, wanted to show you a final pcb screenshot of the wiring, I routed cdone and reset pins out to the headers to be able to program it.
Here follow the rest of the pcb stackup

The end?

Hi fellow readers, today I added 4 small neopixels on the top-right of my board, fixed some of my extremely janky routing for the headers, added some debug headers for the rp2350 and a button to reset the ice40.

I am most likely finished with this board, just needs some polishing and some silkscreen art :)

Routing session #2

Re-did the wiring of some of my components, added routing to the headers
I have yet to find the use for 10 pins
also to add is a nice reset button for the fpga and maybe a programming port

Routed?

Today I changed switched of my capacitors to be 0402, I also placed the components on the pcb and routed them, for the most part.

I also decided I will use a 4 layer board with Signal-GND-3v3?-Signal layout.
I have a few doubts if I have positioned the inductors for the rp2350 regulator correctly
Did some of the work in class because I was bored =D

Habemus schematic!

INSANE rp2350 && ice40 schematic speedrunning session
Just mostly need to get the 40-pin connector in-place
I still have to find the perfect ferrite bead


I also need to add an SPI and UART connection between the rp2350 and the ice40.

By the way, you might be wondering what are those strangely-routed USB and USBc female ports are for, and I will be using those to see if I can make my own TCP/IP stack on the fpga, as a nice side-quest.

Started making the Schematic

Hello, World!
I settled down to a ICE40UP5K-SG48I since it has a QFN package and an OK number of LUTs
Found a crystal suitable for the fpga, and started building the power rails.
I also tried making a power supply filter, but I can't seem to add ferrite beads to the schematic (I'm using Easyeda Pro).

Note that the voltage regulators are still to be chosen, since I want to power an rp2350 on the same board too.