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Forum Index : Microcontroller and PC projects : PicoMite SC Backpack question.
| Author | Message | ||||
KeepIS Guru  Joined: 13/10/2014 Location: AustraliaPosts: 1681 |
I've finally found time to assemble the Silicon Chip Kit with the ILI9488 3.5 LCD. I'm just checking that the behavior is normal. (Latest Firmware) When outputting text to the LCD, as soon as the screen text scrolls, the display slows to a crawl as the screen is updated for each line, even a single char on each line. Now I know that SPI is slow for driving a Screen, but it means that using a keyboard and SPI display to do any standalone programming would be almost unusable. Is this correct? Using a GUI screen seems fine, so I assume that low cost SPI screens running a GUI or single screen text display program is the objective when using SPI? It's all too hard. Mike. |
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phil99 Guru Joined: 11/02/2018 Location: AustraliaPosts: 2140 |
Yes, when using a serial display as the console scrolling is slow as the entire screen must be updated for any motion. Peter resisted allowing serial screens as console for this reason but was asked repeatedly to do it. Parallel screens work well but use most of the pins. The ARMMite F4 has tons of pins so a parallel screen is standard on that. |
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| KeepIS Guru Joined: 13/10/2014 Location: AustraliaPosts: 1681 |
Thanks, yes I mainly use the ARM H7 and have 5" to 9" parallel screens for that. Just wanted to confirm all was good as I'm using one of the RetroScaler PICO-BOOT boards Peter posted a link to a while back, bough 6 of them and this is the first one I have tried, they also have a reset switch on board. It's all too hard. Mike. |
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| lizby Guru Joined: 17/05/2016 Location: United StatesPosts: 3152 |
I'm not sure what you're describing as "slow". One-line-at-a-time scrolling from the bottom or top of the screen is slowish, but PgUp and PgDn are speedy. Normal typing seems fine to me (I touch type, but am not fast). This is with an ILI9488 on a PCB of my own design. PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed |
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