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Forum Index : Microcontroller and PC projects : PicoMite for Waveshare RP2350-PIZero
| Author | Message | ||||
| BOGIN Newbie  Joined: 24/03/2026 Location: UkrainePosts: 2 |
I have two Waveshare RP23450B modules. Can I use the HDMI connector on this module with the PicoMite? |
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| BOGIN Newbie Joined: 24/03/2026 Location: UkrainePosts: 2 |
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| matherp Guru  Joined: 11/12/2012 Location: United KingdomPosts: 11110 |
No, the PicoMite firmware uses the HSTX peripheral for DVI/HDMI and that is only available on gp12-gp19  |
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| JohnS Guru Joined: 18/11/2011 Location: United KingdomPosts: 4285 |
Looking at the schematic of the Waveshare RP2350-PIZero they just seem to bring the HSTX pins out to a (non-DVI/HDMI) connector... why not use them for their designed function and bring other GPIOs out? I suppose I'm missing something but it seems daft. John Edited 2026-03-26 23:37 by JohnS |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 8697 |
It's a silly design. This sort of module is ideal for embedded computing, which the HSTX would be useful for - it doesn't have to be for generating HDMI, it's a very fast 8-bit parallel transmission port. Unless the pinouts are Raspberry Pi compatible and that's how they worked out? I haven't looked. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| ve2yag Newbie Joined: 07/02/2026 Location: CanadaPosts: 3 |
Hi, Some project are compatible with these board, I load this project succesfully and HDMI work perfectly, and a bonus, sound is enabled within hdmi. (WOW!) https://github.com/fhoedemakers/pico-infonesPlus PicoDVI also can use these board configuration for HDMI out. I am a C programmer, I try to merge PicoMite with PicoDVI to use these board but I hit a insoluble bug between two core inside my RP2350 and picomite crash before he start. (One core run PicoMite, other one is used for PicoDVI engine. but both core crash when Picomite try to write internal flash for his filesystem. When Picomite try to update bootcount on filesystem on init code(Write internal flash), PicoDVI crash both core. HDMI is fine when internal FS is disabled, but Picomite become less usefull. Finaly I buy genuine Pico 2 and wire HDMI myself. Rémi |
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| lizby Guru Joined: 17/05/2016 Location: United StatesPosts: 3707 |
Hard to beat this Pico2 DVI sock if you account your time as worth anything. PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on FOTS |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 8697 |
You have to remember that programs that synthesize HDMI using standard GPIO pins and include audio etc. aren't running a BASIC interpreter at the same time so they can use whatever clock cycles they need. There are none needed for the user and no RAM or flash either. They also usually run HDMI with a very limited number of colours in a low resolution with a lot of clever dithering if anything better is needed in static scenes. You can get HDMI out of a RP2040, but it's very limited. . Edited 2026-03-27 08:37 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 11110 |
Remi All code on the second processor must run from ram. Otherwise you will get the crash you see. |
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