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Forum Index : Microcontroller and PC projects : Display for Picomite
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Plasmamac Guru  Joined: 31/01/2019 Location: GermanyPosts: 554 |
What is the best Display for the Picomite, with support for all features and speed? Thx Plasma |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6812 |
SSD1963 + Fast, supports Touch. Available up to medium sizes. All LCD commands supported. - If you can afford the eye-watering prices. Uses most of the pins on the PicoMite. VGA + Fast. Available up to large sizes (very large if you feed a telly). - Doesn't support Touch. Can be bulky. ILI9341 + Supports Touch. All LCD commands supported. Availability isn't bad. - Not available in large sizes. Not particularly fast, especially when scrolling text. It depends on what you need. You have to compromise as there is nothing that excels at everything. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9139 |
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| lizby Guru Joined: 17/05/2016 Location: United StatesPosts: 3152 |
My favorite: ILI9488. It's SPI, but I find the speed for using the editor workable, and the screen size is OK if you can read the letters without difficulty.   Just make sure you get proper ones with touch and not the shift-register maladaptation. But of course it depends on what you want. ~ Edited 2023-04-04 23:15 by lizby PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed |
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stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2134 |
@lizby Hi, I got an ili9488, it's a plug in replacement for ili9341 except the sd card pins are 2 cm further apart. I got a tron game working with touch and play tone and when setting up the display files showed something so thought sd card ok but when I tried play wav "b:/t1" it says sd card not found. I had to use a 580R resistor in the miso from the display to touch and sd card miso "GP16" to make the display work but maybe a problem with sd card. my board takes ili9341 and ili9488 so reverted to ili9341, which seems faster and sd card works. ili9488 is nice display but there's problems with it from forum posts. |
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phil99 Guru Joined: 11/02/2018 Location: AustraliaPosts: 2140 |
If you search the other threads on ILI9488 you will see that the 680R can cause problems with the SD card. The alternative is shown there - a diode and 10k resistor. The diode replaces the 680R, cathode to SDO on the display and anode to MISO on the Pico. The 10k goes from LCD_CS to MISO on the Pico. |
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| phil99 Guru Joined: 11/02/2018 Location: AustraliaPosts: 2140 |
Correction to above, diode wrong way round. The diode replaces the 680R, anode to SDO on the display and cathode to MISO on the Pico. The 10k goes from LCD_CS to MISO on the Pico. See Here. https://www.thebackshed.com/forum/ViewTopic.php?TID=15523&PID=197310#197310#197310 The ILI9488 is a little slower as there is double the number of pixels to send for a full refresh. ILI9488 - 480 x 320 = 153,600 pixels x 18 bits/pixel ILI9341 - 320 x 240 = 76,800 pixels x 16 bits/pixel Edited 2023-04-05 17:08 by phil99 |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2134 |
Thanks phil99 for the link, I posted a breadboard version in that thread. with a diode and resistor does it All work ie sd card graphics and touch? Bouncing 16 16x16 sprites seems slower visually with ili9488 than ili9341. I'll retry ili9488, joys of stripboard over pcb.. easily adapted. Will a blob of solder short the 1K resistors or will they come off the board and is it reversible with a solder sucker? Edited 2023-04-06 00:05 by stanleyella |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9139 |
ILI9488 - 480 x 320 = 153,600 pixels x 24 bits/pixel (18 used) |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2134 |
I tried the resistor/diode solution and it seems to work. touch and graphics and play wav from sd card.. happy days. thanks. I didn't short the resistors to sd card on the ili9488 but absent minded did on the ili9341 that was on the board and the resistors melted/disappeared and I got to resolder the links cos sd card don't work now. It was easy to solder the diode in place of the 680r and add the 10k. My display was cheap "at the time" and nice for my experimenter board.  |
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