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Recomendation for graphic LCD/TFT

 
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Hypno

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Joined: 27 Dec 2005
Posts: 7
Location: Lublin

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PostPosted: Sat Nov 23, 2019 1:29 pm    Post subject: Recomendation for graphic LCD/TFT Reply with quote

Hi, I would like to ask you for suggestions.
I need a 3.2 "- 4" graphic display in my design. Resolution sure 320x200 or 480x320. Other parameters are not important. Actually, the most important thing is size in the given range. If possible, it would be good for the LCD to have an SPI controller, but this is not necessary. I use a Mega2560 processor in the project.
I want the display to support the touch panel and it is best to have the panel included in the set. Now it is not a problem but I have requirements for the touch panel itself. Namely, because the system is to be energy efficient, then for 99% of the time the peripherals will be in sleep mode, including the processor and wake up with interruptions from the RTC clock. I would like it to be the same with the touch controller, which can generate an interruption when touched, and for the remaining time of inactivity save maximum current. I know there are circuits used in other languages ​​for controllers. The LCD price is also important because I plan a series of such devices and I want to have low costs if possible.

And here is the question, what display would you recommend, of course, it is about models that have BASCOM libraries to support.

(BASCOM-AVR version : 2.0.8.2 )
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Paulvk

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Joined: 28 Jul 2006
Posts: 1133
Location: SYDNEY

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PostPosted: Sat Nov 23, 2019 1:40 pm    Post subject: Reply with quote

I am working with a Nextion display at present.
It has a RTC built in , it is controlled by rs232
it handles all the graphics the avr just needs to send and receive commands
you upload bit maps to it so very professional display can be had

Regards Paul
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Duval JP

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Joined: 22 Jun 2004
Posts: 875
Location: France

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PostPosted: Sat Nov 23, 2019 5:55 pm    Post subject: Reply with quote

hi,
Quote:
because the system is to be energy efficient, then for 99% of the time the peripherals will be in sleep mode,

It is difficult to answer to your question because we don't know what 's the request about current.

I'm using Nextion too, so I look at the help about sleep mode https://nextion.tech/forums/search/sleep+mode/

nextion support sleep mode but I never tested it

but it seems to be easy
you have instruction sleep, Wup (wake up) , usup (wakeup on a serial code)


Did you look for e-paper screen ?
https://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&t=14057&highlight=epaper

in another hand you have an interresting discution about display in the Varius forum : https://www.mcselec.com/index2.php?option=com_forum&Itemid=59&page=viewtopic&t=14480

Bon courage
[/quote]

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Pikczu

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Joined: 22 Jan 2006
Posts: 63
Location: Dublin, Ireland

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PostPosted: Sun Nov 24, 2019 12:46 am    Post subject: Reply with quote

I Personally would recommend 4D systems.
Models with Diablo 16 processor.
Unfortunately, they are not cheap at all( and you need the licence to get all fancy stuff).
But that is only my personal point of view, I had (still have )the cheap display and I have learned the lesson.
4D systems have greate tool for graphic design:
https://www.youtube.com/watch?v=81cez-Ws4dQ
Library is also avaiable.
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Hypno

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Joined: 27 Dec 2005
Posts: 7
Location: Lublin

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PostPosted: Mon Nov 25, 2019 7:54 am    Post subject: Reply with quote

NEXTION is probably my discovery Wink
Thank you for the information.

Epaper are at comparable costs and the functionality is incomparable ....

As for the sleep mode, my device consumes 8uA of current, so the mA values are gigantic for me ...
But this is not a problem, I use low-flow converters for power supply, which after cutting off practically do not consume electricity, so I will control the power supply, and because the whole is only woken up properly to the configuration so it is not a problem.

I applaud that I was able to design (mega640pa-au, RTC, EEPROM, 1 Wire, LCD, + sensors) and program that on a 6V / 1.2Ah battery it has been running for over 2 months and has sent over 4,000 SMSes with measurements (Fibocom G510-Q50). Test system set up to send 160SMS messages a day (I want to see how much will be successful). Normally it is sent max 4-8 a day.
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Hypno

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Joined: 27 Dec 2005
Posts: 7
Location: Lublin

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PostPosted: Tue Nov 26, 2019 3:32 pm    Post subject: Reply with quote

Paulvk - Poul,

I would like to contact you. Can you write to me at hypno(at)poczta(dot)onet(dot)pl ?

Piotr
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