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Forum Index : Microcontroller and PC projects : PicoMite: ILI9341 TFT with parallel interface
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| Volhout Guru  Joined: 05/03/2018 Location: NetherlandsPosts: 4246 |
Indeed, let's not get ahead... Let's first prototype and see how much gain there is in speed... because that is why this is interesting, right ? Volhout Edited 2023-09-14 19:40 by Volhout PicomiteVGA PETSCII ROBOTS |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9124 |
For reference since easy to do on the MMX (200MHz) Time for CLS ILI9341 SPI 49mSec ILI9341 16-bit parallel 6mSec ILI9341 8-bit (calculated from the scaled time of 8-bit 480*272 SSD1963) 14mSec NB: the SPI on the MMX is more efficient than the RP2040 but parallel port operations are slower (2 cycles per write) On Pico @ 252MHz ILI9341 SPI 69mSec (66mSec at 133MHz) ILI9341 8-bit (calculated from the scaled time of 8-bit 480*272 SSD1963) 8mSec (14 at 133MHz) Edited 2023-09-14 20:01 by matherp |
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thwill Guru Joined: 16/09/2019 Location: United KingdomPosts: 4043 |
That sounds promising Peter, it certainly looks like it would be fast enough that blitting to the display would no longer be the bottleneck for arcade games. Tom Game*Mite, CMM2 Welcome Tape, Creaky old text adventures |
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