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#pico2

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Tod Kurt (todbot)

The Pico2 RP2350 input bug I mention in the latest episode of @thebootloader is not theoretical, but impacting commercial products like the Bus Pirate (see mastodon.social/@buspirate/113) and all my captouch-based MIDI controllers & synths in my Tindie store. I don’t recommend Pico2 for newbies either: even their official tutorial code will not work on a Pico2 projects.raspberrypi.org/en/pr
#raspberrypipico #pico2 #rp2350 hachyderm.io/@prcutler/1130698

MastodonIan at Dangerousprototypes (@buspirate@mastodon.social)Attached: 3 images RP2350 based Bus Pirate (6 & 5XL) production is paused. E9 errata appears more expansive than reported in datasheet, first batch of RP2350 Bus Pirates are probably DOA. RP2350 inputs seem to stick at ~2.1volts without pull-down/load of ~9K ohms/0.33mA
Bread80

The second of my articles documenting creating a replacement Amstrad CPC gate array using a Raspberry Pi RP2350 microcontroller. This time I use a PIO, a DMA and an array of data to drive the six signals with fixed timings.

Lots of nerdy detail for anyone wants to learn what a Pico is capable of, or for those who want a better understanding of the DMAs.

bread80.com/2024/08/25/pico-ga

bread80.comPico Garry 2350 Part 2: FSIGS (Fixed signals) – Bread80.com
#PicoGarry#PicoGarry2350#Amstrad
_L4NyrlfL1I0

One thing I'm wondering about: The #rp2040 was rated for 133MHz, but in practice got up to 430MHz while still running stably and being able to drive the PIO, PWM, DMA, and CPU at that speed.

Will the #rp2350 in the #pico2 be able to do the same or even higher speeds, or will the CPU give up earlier since it's more complex? The PLL looks like it is mostly the same as in the RP2040 at least.

Anyone that already has an RP2350, can you test what clock speeds you can reach?

Brian Swetland

Oh this is a very nice feature of the RP2350's (Q)SPI memory interface:

"The QMI can map addresses with its built-in address translation hardware: each chip select is partitioned into 4 × 4 MB windows, whose physical base address and aperture size are configured in units of 4 kB (one flash sector). This enables the runtime addresses of flash programs to be independent of where they are stored."

Massively simplifies a lot of things, including A/B firmware images.

#Pico2#RP2350
Brian Swetland

Lots of fun new goodies in the RP2350.

New QMI memory controller supports two SPI/QSPI memory devices, and RAM as well as ROM/flash.

OTP area allows for USB VID/PID/string customization from bootloader onward, and user-provided second stage bootloader if desired.

Various PIO improvements and a 3rd PIO unit.

All USB errata from RP2040 fixed.

A new high-speed serial output block (HSTX) that can drive 8 outputs at 150MHz (optionally DDR). Interesting!

#Pico2#RP2350
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