Article: NuttX RTOS for PinePhone: Feature Phone UI in LVGL, Zig and WebAssembly

[WhiteHexagon]

Hi @lupyuen , congratulations on the milestone! You raced through that one   In the meantime I only just finished testing my 'tcon' and 'de' implementations in Zig.  Last 'gotcha' was SRAM_CTRL_REG1 having a default value, meaning undocumented, that needed to be zeroed.  I find all these undocumented hacks really unsettling.  For example on the tcon side I removed the delay after PLL_VIDEO0 and instead looped waiting for the LOCK bit, no idea if that is valid, but seems to work and removes one mystery delay() call (which anyway I could not work out how to implement in Zig), but it would be nice to have confirmation on all these small tweaks that seem to be needed.  I guess all the developers moved onto new shinny PineTab toys   Although it seems to have gone very quiet regarding blog news etc, 4 months? did I miss some other news regarding the community?  Anyway I think I continue a while longer, since this is good for exercising my Zig skills.

So what is next for you? the educational plans? or LVGL on star64?

Code:

    //step 1 - configure PLL
    var pll = ccu.PLL_VIDEO0_CTRL_REG.peek();
    pll.PLL_ENABLE = true;
    ccu.PLL_VIDEO0_CTRL_REG.poke(pll);
    //wait PLL stable
    while (ccu.PLL_VIDEO0_CTRL_REG.peek().LOCK == false) {
        lockWaitCntr += 1;
        if (lockWaitCntr > 10000) {
            debug.red(true);
            return;
        }
    }