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Forum Index : Microcontroller and PC projects : New 4 inch LCD
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| matherp Guru  Joined: 11/12/2012 Location: United KingdomPosts: 9115 |
Please set them to default and try again |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 509 |
Hi Peter, Ok by going default I don't get the double pages, so I experimented to see what I could get away with and 300 & 100 seems about the fastest, but then I noticed, if I reduced the CPU to 126Mhz it came back, so it is also dependent on how fast the CPU is running. So then I found the fastest keyboard repeat I could get away with at 378Mhz, which was 250,100 but as soon as I reduced the CPU to 252Mhz it was back to double paging every time. Hope this helps. Regards Kevin Edited 2024-03-24 04:57 by Bleep |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9115 |
Kevin Please try the attached PicoMiteUSB.zip |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 509 |
Hi Peter, Yes that seem to have fixed the double page listing, thank you, I have tried various different repeat rates and all seem good; but I am still getting the "ERROR : Screen not configured" when I do a "FLASH LIST x" as soon as the listing gets to the bottom of the screen, if it is possible to resolve that? Thanks. Regards, Kevin. |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9115 |
For info, I bought this display Works nicely, very bright and clear (and cheap), but the colours are inverted. I'll put a switch in the setup command to cater for it. Also I can confirm that like all ILI9488 it needs the resistor/diode mod to be compatible with an sdcard even without a touch chip  Edited 2024-03-25 22:47 by matherp |
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palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1873 |
My 4" display arrived and I tested. first with a PicoMite V.5.07.00b19 I have done the resistor/diode mod. GUI Test LCD panel works OK. The panel is set for landscape and works as expected. The panel calibrated ok, no errors. However GUI test touch does not work as expected, if I draw a line accross the screen all I get is random pixels but not where I'm touching. Then I tested on a MM2 V.5.0505 with the ILI9488 driver and set to landscape. GUI test LCD panel works OK. GUI calibrate works but is Portrait not Landscape. It does not matter whether I set L or P they are both portrait Gui test touch works as expected. I have 2 x 3.5" panels and one 4" and they all show the same fault. So I have concluded the LCD Panel is OK. but something funny is happening with the drivers. I have use many, many ILI9431 panels and SSD panels and never had any problems, until this ILI9488. Edited 2024-03-26 13:00 by palcal "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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phil99 Guru Joined: 11/02/2018 Location: AustraliaPosts: 2135 |
Have been using a ILI9488 with a PicoMite V.5.07.00, 08, 09 and have not seen this problem. Instead of GUI test touch see if this does anything different. do :x=touch(x) :y=touch(y) :pixel x, y :loop |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1873 |
It does but more than one pixel lights and not where I touch. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1873 |
Why when I use OPTION LCDPANEL ILI9488 when I list OPTIONS it comes up as ILI9341. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1873 |
I'll flash with the latest firmware and see what happens. "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| palcal Guru Joined: 12/10/2011 Location: AustraliaPosts: 1873 |
@ phil99 thanks for all your help, Ok flashed with V.5.08 and all works correctly. Should have updated the firmware before and save myself a lot of bother. I'll look into the problems with the MM2 another day. . . Edited 2024-03-26 17:32 by palcal "It is better to be ignorant and ask a stupid question than to be plain Stupid and not ask at all" |
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| Frank N. Furter Guru Joined: 28/05/2012 Location: GermanyPosts: 828 |
I have just tried the new version V5.09.00 RC1 and noticed a strange behavior. I had set font 8 for the test (the device was connected to the PC via USB) and opened the editor. After I closed the editor and reset the font with OPTION LCDPANEL CONSOLE 7, all pages ran through at once with LIST. When LIST was entered again, all pages ran through again without interruption. After I disconnected the device from the PC, everything was back to normal. Unfortunately, I have not yet succeeded in producing this error again! I can live with it, but I just wanted to draw attention to it... My options are unchanged: > option list PicoMite MMBasic USB Edition 5.09.00RC1 OPTION SERIAL CONSOLE COM2,GP8,GP9 OPTION SYSTEM SPI GP18,GP19,GP16 OPTION SYSTEM I2C GP6,GP7 OPTION COLOURCODE ON OPTION KEYBOARD GR, 0, 0, 600, 150 OPTION CPUSPEED 252000 'KHz OPTION LCDPANEL CONSOLE 7 OPTION DISPLAY 40, 80 OPTION LCDPANEL ILI9488, LANDSCAPE,GP15,GP14,GP13,GP2 OPTION TOUCH GP12,GP11,GP10 GUI CALIBRATE 0, 3969, 3900, -1228, -848 OPTION SDCARD GP22 OPTION AUDIO GP0,GP1', ON PWM CHANNEL 0 OPTION RTC AUTO ENABLE OPTION DEFAULT FONT 7, 1 Frank |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9115 |
Frank You don't appear to be setting the "noscroll" option. The ILI9488 supports reading so without the option the firmware assumes is will uses normal (slow) scrolling. The option is set automatically for displays that don't support reading |
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| Frank N. Furter Guru Joined: 28/05/2012 Location: GermanyPosts: 828 |
Ok, I have now set NOSCROLL - so far I can't see any difference... > option list PicoMite MMBasic USB Edition 5.09.00RC1 OPTION SERIAL CONSOLE COM2,GP8,GP9 OPTION SYSTEM SPI GP18,GP19,GP16 OPTION SYSTEM I2C GP6,GP7 OPTION COLOURCODE ON OPTION KEYBOARD GR, 0, 0, 600, 150 OPTION CPUSPEED 252000 'KHz OPTION LCDPANEL CONSOLE 7,,,,NOSCROLL OPTION DISPLAY 40, 80 OPTION LCDPANEL ILI9488, LANDSCAPE,GP15,GP14,GP13,GP2 OPTION TOUCH GP12,GP11,GP10 GUI CALIBRATE 0, 3969, 3900, -1228, -848 OPTION SDCARD GP22 OPTION AUDIO GP0,GP1', ON PWM CHANNEL 0 OPTION RTC AUTO ENABLE OPTION DEFAULT FONT 7, 1 Frank |
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| matherp Guru Joined: 11/12/2012 Location: United KingdomPosts: 9115 |
More info on the 4" IPS panel Just received a "standard" 4" ILI9488 and the image quality on the IPS version is MASSIVELY better. If you want a display as a console I can strongly recommend this over the standard |
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| Bleep Guru Joined: 09/01/2022 Location: United KingdomPosts: 509 |
Hi Peter, On your recommendation ;-) I've just ordered a touch 4" IPS, are you powering it from 5V or 3.3V? I've now got my non IPS working from a back pack, display only so far, I'm waiting for other bits, but it will become a USB console Picomite, so I might as well have the best screen for it. :-) Regards Kevin. Edited 2024-03-27 01:32 by Bleep |
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stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2128 |
what's the difference between the ips 4" and "standard" 4" ili9488 please? |
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Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6786 |
It's the type of LCD used. "In-Plane Switching". You get richer colours and better viewing angles. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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| stanleyella Guru Joined: 25/06/2022 Location: United KingdomPosts: 2128 |
is it a drop in replacement for standard ili9488, which has narrow viewing angle? there's a 3.5" version with capacitive touch it says for £6 odd |
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| Mixtel90 Guru Joined: 05/10/2019 Location: United KingdomPosts: 6786 |
The LCD is almost certainly a direct replacement, but MMBasic doesn't support any capacitive touch chips AFAIK. Mick Zilog Inside! nascom.info for Nascom & Gemini Preliminary MMBasic docs & my PCB designs |
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