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Forum Index : Microcontroller and PC projects : RP2350 firmware
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| matherp Guru  Joined: 11/12/2012 Location: United KingdomPosts: 8855 |
Here is a couple of hack binaries for those of you with RP2350 to play with PicoMiteVGA.zip PicoMite.zip mm.device$ will tell you if you have a rp2350a or rp2350b Next job is to replace the VGA logic with HDMI and see if I can get that working |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 8855 |
Here is my HDMI test program. You can use this to test your HDMI setups. Will run on RP2350A or B TestHDMI.zip 10 seconds of each mode Mode 1: 640x480x2 colours with foreground and background tiles (down to 8x8) Mode 2: 320x480x16 colours with rectangle displayed on top layer Mode 3: 640x480x16 colours Mode 4: 320x240x256 colours with rectangle displayed on top layer Mode 5: 640x480x4 colours with additional 4 colours available for layer showing rectangle Mode 6: 320x240x16777216 colours. NB: this might disappear in real code Mode 7: 320x240x65536 colours. NB: probably good enough to remove mode 6 Note in the case of tiles, and 4,16,and 256 colour modes. The user will be able to specify their own colour mappings with RGB888 (16777216) colour choices. |
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Martin H. Guru Joined: 04/06/2022 Location: GermanyPosts: 1037 |
wow, thats fast ...  cant wait for my RP2350 to be shipped 'no comment |
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| gadgetjack Senior Member  Joined: 15/07/2016 Location: United StatesPosts: 134 |
I received the Seeed RP2350 mini module. Can the HDMI pins be changed or are they set in stone? The pico2 boards are not ready to ship yet. If not , I can wait. |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6375 |
I'm just gazing happily at one of my two Pico 2s flashing its heartbeat LED. :) The DVI/HDMI pins are fixed as GPIO 12 to 19. The Datasheet makes no mention of there being any alternative mapping. They are a part of the HSTX module. . Edited 2024-08-20 07:01 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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TassyJim Guru Joined: 07/08/2011 Location: AustraliaPosts: 6008 |
Peter, Can you give me the exact output of mm.device$ for each variant so I can add them to MMEdit. It might be a while before I have any modules to play with. Jim VK7JH MMedit MMBasic Help |
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| gadgetjack Senior Member Joined: 15/07/2016 Location: United StatesPosts: 134 |
The nearest I can get them is in 3 weeks for the full pico 2. |
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| PhenixRising Guru Joined: 07/11/2023 Location: United KingdomPosts: 658 |
Got the "Tiny 2350" running @378MHz and with the quadrature PIO code  Many, many thanks, Pete. No encoder attached, yet so not sure if actually reading but it didn't complain. |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 468 |
Have connected one up to a ILI9481 display and a SD card, running at 378MHz without a hitch. Havent got a HDMI break out yet, to try your HDMI demo, maybe later. Thanks for getting this all going. :-) |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 8855 |
Progress   NB: as discussed elsewhere GP12 to GP19 are not available as these are dedicated to the HSTX peripheral and can't be changed. CPU speed is fixed at 252MHz. The HSTX peripheral can only run at power-of-2 multiples of the CPU speed. To get this to work I've disabled tiles and other small bits and still haven't enabled the extra pins on the 80-pin chip or implemented the other graphics modes yet so still a fair bit to do. The underlying graphics will be 640x480x15bits running RGB555. This keeps the bus bandwidth to half of RGB888 and still allows 32 true grey scale levels if that is the sort of thing you want  Running on my little HDMI adapter board GBP20 for 5 fully built from JLC Gerber_PCB1_2024-08-20.zip BOM_Board1_PCB1_2024-08-20.zip  Image quality is excellent, here editing in mode 2 Edited 2024-08-21 01:03 by matherp |
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lew247 Guru Joined: 23/12/2015 Location: United KingdomPosts: 1689 |
Peter You probably know this already but have you seen this about the HSTX interface? |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 468 |
Have now got the HDMI demo working using an Adafruit break out board. Tried it first on a large screen TV and got nothing, then tried a monitor and it worked fine, so some TV's may not be happy. |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 468 |
That's a real shame that the HDMI version will be limited to 252MHz :-( So we will need to use the LCD version to get the full use of any performance gains, from frequency above 252, on top of the processor speed improvements. Oh well there are always compromises. |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6375 |
I/m confused. The crystal frequency is 12MHz. 252MHz / 12MHz is 21. That isn't a power of 2. 384MHz / 12MHz is 32. That *is* a power of 2. This is probably something to do with PLLs or something confusing like that. Mind you, I'm easily confused. :) 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: 8855 |
The system clock can be tuned to a wide range of frequencies. However, the HSTX clock can only be a power of 2 division of the system clock. As the chip won't run at 504MHz then 252 is the best we can do |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6375 |
Good job I got used to using VGA at 252MH then. :) This is looking really nice! I loaded the ordinary Pico 2 firmware last night. It's running beautifully but I've not had time to do much yet. Too busy playing with SL6. Your little board is neat. It looks like the same HDMI socket that I'm going to attempt to solder. Eek! 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: 8855 |
Try this on the TV. Change to 640x480 @ 73Hz. Also means the CPU runs at 315MHz rather than 252MHz TestHDMI.zip |
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| robert.rozee Guru Joined: 31/12/2012 Location: New ZealandPosts: 2335 |
hi Peter, moving to DVI could be a good opportunity to also upgrade the font used in the editor. have a look here: http://www.fial.com/~scott/tamsyn-font/ there is an 8x15 version of this font, where (most) characters are 6-pixels wide (ie, 2 pixel spacing between letters). this makes text far more readable than the current 7-pixel width (with just a single pixel between letters). there are also proper descenders!  cheers, rob :-) Edited 2024-08-21 03:43 by robert.rozee Footnote added 2024-08-21 18:23 by robert.rozee see also: https://github.com/sunaku/tamzen-font/tree/master for another version derived from Scott Fial's work. there are also 7-pixel wide versions that could be widened (by the addition of an extra column of blank pixels) that look extremely good. |
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stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 1867 |
I got to wait until December for rp2 boards. It's frustrating can't participate. mmbasic must have popularised rpi. ie more sales, do the mmbasic developers have any special communication with the rpi guys? |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6375 |
I don't think there's any arrangement whatsoever, Stan! In fact, RPi don't seen to even acknowledge that MMBasic even exists. :( I was lucky and got a pre-order in for a couple of Pico 2s as soon as I saw the announcement. I think it's the first time in my life that I've been one of the first to get something that didn't turn out to be horrible. I'm making the most of it. :) The PGA2650 is available AFAIK, a is the other little board. It's the Pico 2 that's slow arriving at the moment. The PGA2650 isn't stripboard friendly in the least. :( ============= Well, VGA seems to be working. I ended up having to make a new breakout board for it though - couldn't find my "wire ends" lead. :( . Edited 2024-08-21 07:17 by Mixtel90 Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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