connecting a LCD ELT240320ATP color display to AVR?

19 posts / 0 new
Last post
Author
Message
#1
  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

hello
any one ever tried interfacing a touch screen color lcd display on AVR ICs like mega32?

it has a driver ILI9325.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

I have used the code from www.circuitidea.com

You will need to change the init a possibly a few other bits for your driver chip.

Depending on what you want to do with your LCD you may find that you don't have enough memory to, say, have some icons in flash. Also the displays run at 3.3V max so you either run the M32 at 3.3V and limit your clock to 8MHz (pretty slow if the display is largish) or run the M32 at 5V, use level shifters and run at full speed of 16MHz.

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Quote:

either run the M32 at 3.3V and limit your clock to 8MHz (pretty slow if the display is largish) or run the M32 at 5V, use level shifters and run at full speed of 16MHz...

...or get into the new millennium and use e.g. Mega644PA (to gain more flash space) and run at ~12MHz @3.3V.

You can put lipstick on a pig, but it is still a pig.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

...or even better use a Xmega @32MHz... Or a..... :-)

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

thanks people, i found a function liberary for it, currently i am running tests with a mega32L working with 24MHz and 3.3 volts! will report back after achieving better more useful results.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

"mega32L working with 24MHz and 3.3 volts" sounds promising for an IgNobel prize :lol:

Warning: Grumpy Old Chuff. Reading this post may severely damage your mental health.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Now control yourself Mbedder. I know it's hard. :-)

whiteman7777 have you looked at the datasheet of the M32L running at 3.3V? What is the maximum clock frequency which can be used at that voltage? Are you just going to make a one off for experimentation?

hint: bottom of first page-Speed grades

John Samperi

Ampertronics Pty. Ltd.

www.ampertronics.com.au

* Electronic Design * Custom Products * Contract Assembly

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Designers usually introduce attitudes of their architectural works with a “reduce for insurance” quantities so people would not come and say "hey your atmega32L at 24MHz failed me you ****"

it was working at 24MHz but i reduced it to 20MHz because it had failures often, currently it is working at 20MHz crystal resonated clock frequency and 3.3 supply voltage very nicely! :)

will report back if any thing interesting achieved.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

i wonder if there are any member of AVR family with CK frequency more than 30MHz confirmed??

is it too different working with Xmegas? are registers and workings changed a lot?

what examples can you represent?

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

i wonder if any one is moderating these forums, i would certainly like to report some Russian trolls around.

  • 1
  • 2
  • 3
  • 4
  • 5
Total votes: 0

Quote:

i wonder if any one is moderating these forums

The moderators for each forum is mentioned at the top right of every forum thread listing. One of them has participated in this thread already. :wink:

"Some questions have no answers."[C Baird] "There comes a point where the spoon-feeding has to stop and the independent thinking has to start." [C Lawson] "There are always ways to disagree, without being disagreeable."[E Weddington]

Pages