The latest release of uLisp now supports Pimoroni’s Pico Plus 2 board:
Based on the Raspberry Pi RP2350 it has 16MB of flash, 520KB on-chip SRAM, and 8MB of PSRAM, allowing you to have 1000000 objects of Lisp workspace.
For more details see Pimoroni RP2350 boards.
Thanks so much for this work, it is very greatly appreciated!
I’m actually quite fond of the boards Pimoroni is producing lately, they tend to be quite feature-rich for their size and price. Even here in the US, the shipping is quite fast too, and not unreasonably expensive (IMO). I’ve purchased a LOT of stuff from them, and never yet run into a “stinker”, and their designs have all been very solid in use. They even focus on the little details, like making sure to add PSRAM to new RP2350 design, for example, where most of Adafruit’s have the pad but lack the part (MakerPaste ho!).
That said, while this board is an amazing little SBC, I’m still anxiously awaiting the Metro RP2350, as that Ard shield compatibility of the Metro design always turns out to be useful. I just wish they’d include psram with it (and am lobbying for same).
Anyway, thanks again! Hope to begin contributing once I get a bit more comfortable in the source.
Thanks for the comments! I’m hoping to get my hands on an RP2350 Metro and Feather, so I can support both of them.
I probably have a spare RP2350 feather around. If that’ll help, msg me where to send it.
I’m hoping my lobbying for Adafruit to add the psram to the Metro RP2350 works, I really don’t want to have to try and use a soldering iron to melt solder paste, even if I did get PSRAMs specifically to address that for both that board and the Feather.
Alas, if I send an RP2350 Feather you’ll need to add the PSRAM yourself, I have some grave doubts about my meager soldering skills being up to that level of task. On the Metro where it’s kind of open around the pad, I’m pretty sure I can do it with MakerPaste and my Hakko’s fine flat tip, but on a board as crowded as the Feather I’m a lot less certain of my abilities. If you have any tips, I’d certainly love to hear them!
Thanks as always!
You don’t need to use anything fancy to solder surface mount, it’s easier than you think. Here’s a video on how to do it with regular solder https://youtu.be/EW9Y8rDm4kE?t=374&si=FOZlo302V617WPmj
Appreciate the pointers, thanks. I believe one of those was where i first learned how to work with SMT parts. However, as I mentioned, there’s still a level of extremely-fine motor control involved that 30+ years of typing for a living (coding), etc. now make difficult for me. As I mentioned, for more-open pads like the PSRAM pads of the Metro RP2350, I’d be fine, it’s the crowded ones (such as on the RP2350 Feather) where I often find myself needing to move (or not move) at an angle where that’s difficult for me.
Regardless, though, thanks, I’ll take any potential tips or new techniques in that regard!
