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fruit-bat / pico-zxspectrum

ZX Spectrum for Raspberry Pico Pi RP2040
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LCD Display not working #185

Open cosmicfrog3000 opened 2 days ago

cosmicfrog3000 commented 2 days ago

Hi. I cannot get the LCD display working (ST7789 and ILI9341) All I get is a white screen. I think the problem may be with the RESET line. Should this be connected? If so where? Many thanks. Dave.

cosmicfrog3000 commented 1 day ago

Got it working! The reset pin goes to the RUN pin of the pico. Dave.

fruit-bat commented 1 day ago

Glad you got it working!

cosmicfrog3000 commented 1 day ago

I'm wanting to use this on a RP2040 ZERO Waveshare board but they don't have a RUN Pin. It looks like you can just connect the RESET to the 3.3v line and it will work. Would it be ok and safe to do this? Many thanks. Dave.

fruit-bat commented 1 day ago

I would try a pull up resistor rather than just wiring to the power rail. Not sure if it will work; its probably ok. Kind of depends if the ST7789 manages to start as the power comes up. Just give it a try.

cosmicfrog3000 commented 1 day ago

Thanks for the reply. I've tried it on a standed RP Pico and it works ok, but I'll try it with a resistor to be safe. Great emulator by the way! Dave.