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Forum Index : Microcontroller and PC projects : Blit on LCDPANEL ST7789_135?

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Calli
Regular Member

Joined: 20/10/2021
Location: Germany
Posts: 74
Posted: 04:54pm 04 Nov 2021
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I hoped that it will have the same things as the others ST7789 (which BLIT).

But no? Is it a driver thing or hardware?

Best,
Carsten
 
matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 10613
Posted: 04:59pm 04 Nov 2021
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H/W - Waveshare don't bring out the MISO pin so I can't read the framebuffer on the ST7789
 
Mixtel90

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Joined: 05/10/2019
Location: United Kingdom
Posts: 8297
Posted: 05:00pm 04 Nov 2021
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It looks like BLIT is only supported on the ST7789_320. It could be that the display can't be read back on the others, that would be a hardware limitation.
Mick

Zilog Inside! nascom.info for Nascom & Gemini
Preliminary MMBasic docs & my PCB designs
 
Calli
Regular Member

Joined: 20/10/2021
Location: Germany
Posts: 74
Posted: 06:58am 05 Nov 2021
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  matherp said  H/W - Waveshare don't bring out the MISO pin so I can't read the framebuffer on the ST7789


Ahhh! Same for the Pimorini Picodisplay. So they don't just leave MISO out for saving a GPIO :)

Thanks for clarifying!
Carsten
 
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