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[TM4C129x] Question for LCD controller module

Kaka
Guru 24520 points
Other Parts Discussed in Thread: AM3359

Hi community member,

Please let me confirm the following question.

[Question]

  Would you please show us the supported maximum LCD size by TM4C129x with LIDD and Raster mode?

If you have any questions, please let me know.

Best regards.

Kaka

  • 0
    Guru 117855 points

    Kato Motoki said:
    show us the supported maximum LCD size

    At the recent CES - we saw LCDs & OLEDs - beyond 80" diagonal.  Yet the sweet spot for most was 40-60" diagonal.

    Might you have meant to ask, "what is the maximum number of pixels - both X & Y - supported?"

    That (proper) wording reveals another issue - many "pixel intensive" LCDs now contain on-board, LCD Controllers.  (greatly reduces the demand placed upon the MCU by eliminating the requirement for constant display "refresh.")  Imho - this considerably speeds & eases your display management.

    Others may guide in the max pixel support should you choose an LCD w/out controller...

  • 0
    TI__Guru**** 244380 points
    Hello Kato,

    In LIDD Mode we have used 640x480 and for Raster Mode we have used 800x480 panels. However for the Raster Panel the bandwidth requirement is higher due to continuous fetch and both have been tested for grlib Graphics framework

    Regards
    Amit
  • 0 in reply to Amit Ashara
    Guru 24520 points
    Hi CB1, Amit,

    Thank you for your responses. I am beginner for LDC controller.
    Could you please show us the maximum resolution?

    Regarding to competitor device, it shows this specification as below.
    LCD-TFT controller up to XGA resolution with dedicated Chrom-ART Accelerator™ for enhanced graphic content creation (DMA2D)
    www.st-japan.co.jp/.../PF255421

    If you have any question, please let me know.
    Best regards.
    Kaka
  • 0 in reply to Kaka
    Guru 117855 points

    One hopes this will be, "pinch-free" response...

    While it's reasonable for you to be concerned re: X/Y pixel resolution - "figures of merit" for such displays usually include:

    a) Contrast

    b) Viewing Angle

    c) Brightness

    Choosing a display via only a single criteria (usually) does not yield best/brightest selection...

  • 0 in reply to Kaka
    TI__Guru**** 244380 points
    Hello Kato,

    An important question that remain unanswered "What is the requirement of the end application?'.

    Regards
    Amit
  • 0 in reply to cb1_mobile
    Guru 24520 points

    I apologize that I could not understand what you said...

    In case of Sitara Processor, this LCD driver support up to 2048* 2048.
    processors.wiki.ti.com/.../AM335x_LCD_Controller_Driver's_Guide

    http://www.tij.co.jp/jp/lit/ds/symlink/am3359.pdf

    I would like to know this performance in case of using Tiva LCD controller.

    Best regards.
    Kaka

  • 0 in reply to Amit Ashara
    Guru 24520 points
    Hi Amit,

    Now, my customer does not decide to use for end application.
    They have made some instruments such as electrical Piano effector. And they have used the Segment LCDs for their application.
    So, they would like to make a study to use color LCDs for their application in next model.

    Best regards,
    Kaka
  • 0 in reply to Kaka
    TI__Guru**** 244380 points
    Hello Kato,

    So as I well understand your customer requirement, resolution is not important for the end application. It is the ability to do graphics that is a driving criteria. Though it is much debatable, TM4C will be able to do the same with the existing grlib example on TM4C129

    Regards
    Amit
  • 0 in reply to Amit Ashara
    Guru 24520 points
    Hi Amit,

    Thus, my customer does not have requirement for LCD controller at this time, because of my previous post.
    Why TM4C129x does not explain about resolution even though other processor which is supported LCD controller defined this specification in datasheet?

    Best regards.
    Kaka
  • 0 in reply to Kaka
    TI__Guru**** 244380 points
    Hello Kato,

    I really cannot explain why ST would do that other than getting "mileage". TM4C12x data sheets are structured to not bias but for a customer to evaluate the solution based on the requirements.

    A data sheet can be structured to the extremities (TM4C12x can do that) but it would be unfair for us to come back and say that all of the high performance cannot be done together, so a customer may end up doing trade off's in your system. My apologies in advance, but I don't think I have anything more to add to this post.

    Regards
    Amit
  • 0 in reply to Kaka
    Guru 27285 points

    Kato Motoki said:
    Thus, my customer does not have requirement for LCD controller at this time, because of my previous post.
    Why TM4C129x does not explain about resolution even though other processor which is supported LCD controller defined this specification in datasheet?

    Dear KAKA, you are spanning many of forum I am following for professional reason, so your question are forever of a kid with a new game is not able to solve.... Your game is VERY DANGEROUS in term of Intellectual Property Violation!!!

    OMAP processor you mention and where your still pose silly question I got, are dedicated to OS level as Linux to do special complex application on HIGH computational power in term of processor and DSP too, so external interface to commercial LCD through an HDMI connection set up max resolution due to standardized interface of that market!!!

    TIVA has max bandwidth and register max value I don't know where saturate resolutionX resolutionY or bandwidth too...

    So your is a non sense question!!!

    If you are not able to make project don't try ask us do for you to sell to a customer.. This is profession abuse.

    WE DON'T SUPPORT NOR WE ARE RESPONSIBLE TOO!!! If you insist whenever I see a request like the last two I report for abuse to protect our professional arena here and to professional care org.

  • 0 in reply to Amit Ashara
    Guru 117855 points

    May I support Amit in his comment & review?   Datasheets & manuals are not - always - produced entirely by the tech/engineering department.  Marketing (here & elsewhere) has been known to (intrude) with the result that facts/truths may suffer some "jitter."  (to be kind)

    Some of what you seek may rest in the hands of your client-user - their skill, experience & diligence.  Your focus (here) may harvest better results if extended to the using party...

    Very often - an "Eval Kit" - best representing (matching) your client-user's projected application/use - provides the best means to arrive at an optimal solution...

  • 0 in reply to cb1_mobile
    Guru 24520 points
    Hi Amit, Roberto, CB1,

    Thanks for your responses and kindly supports.
    I am sorry that I hurt your feelings.
    I have answered this question to my customer.

    I will be careful from now on.
    Again, I am very sorry.

    Best regards.
    Kaka
  • 0 in reply to Kaka
    TI__Guru**** 244380 points
    Hello Kaka,

    I do understand when customers potentially get biased by data sheet and product notes. In fact I support cb1 on the customer actually acquiring the EVM's and develop/apply some examples to see how much the device claims v/s performs as per their requirement. At the end a lot is based on expansion window and price.

    No hurt of feelings on this side of the forum, so all's well from my side.

    Regards
    Amit
  • 0 in reply to Kaka
    Guru 27285 points
    Hi KAto, is not question of OUR feelings but is question of Ethics and Rule imposed by our professional level.
    We can help grow but not support sell our knowledge and professional work for nothing.
    So this is not breaking our feelings but our professional association rules and respect of all members of. If some things break possible income of another professional figure then this is contrary to our rule, I am so sorry but I felt this on your style.