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Forum Index : Microcontroller and PC projects : PicoMiteHDMI firmware - first cut
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| matherp Guru  Joined: 11/12/2012 Location: United KingdomPosts: 9110 |
PicoMiteHDMI.zip Should run on any RP2350 with pins GP12 to GP19 broken out. Wiring: GP12 : D0+ GP13 D0- GP14 : CK+ GP15 CK- GP16 : D2+ GP17 D2- GP18 : D1+ GP19 D1- This should behave pretty much like the VGA firmware. CPU speed is fixed at 315MHz and your screen will see 640x480@75Hz The maximum number of variables is increased to 768 and the maximum number of function/subroutines/labels to 512. Maximum program size is now 180Kbytes and there is 42Kbytes used for simple variables and variable headers and another 180Kbytes for arrays and strings. I expect with the M33 core that it should be possible to enable MP3 playback with just the standard audio connections. This is the next job. There are many conditional compilation directives to support the HDMI/RP2350 version with exactly the same codebase as all other Picomite variants so there may well be bugs and/or functionality I have patched out and not yet converted - please report anything you find At the moment graphics modes 1 and 2 are implemented and things like frame-buffers and layer-buffers should work like the VGA version EXCEPT that when creating them you don't use any of the user memory. Set OPTION COLOURCODE ON to have colour highlighting in mode 1 editing as before. The map command is now more powerful and will work in mode 2. MAP(n)=RGB888colour 'n=0 to 15 'this sets up an internal mapping for colour n in RGB555 MAP SET 'this actions any previous map(n) commands and the screen will then change colour. So you can now use any 16 of 32768 colours in mode 2 MAP RESET 'sets the mapping back to the default RGB332 mapping MAP GREYSCALE/GRAYSCALE 'instantly changes all 16 colours to greyscale levels. Try this then do GUI TEST LCDPANEL to see the effect. You can then still use the MAP(n)/MAP SET to change some of the greys to another colour MAP MAXIMITE 'instantly changes all colours so that colours 0 to 7 are the same as the colour Maximite REMEMBER to access a mapped colour use the MAP function MAP(1)=RGB(50,50,50):MAP SET TEXT 0,0,"Hello world",,,,MAP(1) 'output text in the grey colour just defined PSRAM can be enabled with OPTION PSRAM PIN n ' n=0, 8, 19, or 47. If this is done on a RP2350 without PSRAM then the option will be automatically disabled. To access PSRAM use the address &H11000000 e.g. poke word &H11000000,&H12345678 ? peek(word &H11000000) More to come on this later  Edited 2024-08-22 04:11 by matherp |
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Martin H. Guru Joined: 04/06/2022 Location: GermanyPosts: 1113 |
Thank you Peter with the Map command we are able to redefine the Color pallet at runtime, right? So it should be possible to make those deluxe paint color mapping animation like on the AMIGA back then  I'll test it out as soon as I get the Pico 2 Edited 2024-08-22 04:28 by Martin H. 'no comment |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6780 |
@Peter When using the USB version, are GP8 and GP9 bitbanged as a serial oprt or is COM2 used for the console? Just trying to sort out whether to put a ESP on COM2. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| al18 Senior Member  Joined: 06/07/2019 Location: United StatesPosts: 205 |
Peter, What Pico2 hardware are you using? Based on the info you’ve mentioned, I’ll guess Pimoroni Pico Plus 2 with the Adafruit DVI breakout board 4984 |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9110 |
My own little adapter board (gerbers on the other thread ) and a breadboarded Pimoroni PGA2350  Edited 2024-08-22 18:47 by matherp |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 509 |
For completeness, I have run the BubbleUniverse on this HDMI version, as well as the others and get the following results:- 2040 VGA @ 378MHz bubble runs at 286mS per frame 2350A VGA @ 378MHz bubble runs at 163mS per frame 2350A HDMI @ 315MHz bubble runs at 191mS per frame For VGA approx. a 1.75 times speed up, over 2040 VGA. :-) For HDMI approx. a 1.5 times speed up, over 2040 VGA, only limited by the fact that the core frequency is 315Mhz (HDMI clock requirement) as opposed to 378Mhz for VGA. Not too shabby. I'll have to increase the number of points it plots to slow it down again ;-) Otherwise everything I have so far tested is working fine on the PicoMiteHDMI, display quality looks good stable & sharp & full screen. :-) Regards Kevin. Edited 2024-08-23 02:47 by Bleep |
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