[TriEmbed] fast TFT library for ATMEGA

vikram sai balaji ulaganathan tayirvadai.vikram at gmail.com
Fri Jun 5 09:11:57 CDT 2015


I agree launchpad was easy to use along with the software associated with
it.
On Jun 5, 2015 9:49 AM, "Robert Gasiorowski via TriEmbed" <
triembed at triembed.org> wrote:

> You should try LaunchPad :) No level shifting required.
> I have written glib that supports several different LCDs and LPs, and is
> one of the fastest (if not the fastest) graphics library for LPs.
>
> Rob.
>
> On Fri, Jun 5, 2015 at 8:50 AM, Alex Davis via TriEmbed <
> triembed at triembed.org> wrote:
>
>> In case you didn't see this, someone updated the Adafruit TFT libraries
>> to get a significant increase in performance out of the cheap, small TFT
>> color displays:
>> https://hackaday.io/project/6038-pdqgfx-optimzed-avr-lcd-graphics
>>
>> I tried it myself on an ST7735-based SPI display running on a 16 Mhz
>> ATMEGA1284p. It's fast enough that full-screen updates are possible,
>> whereas before you had to be clever and use windowing or try to limit
>> the pixels changed.
>>
>> The downside is that under the library, SPI is now pushing enough data
>> to reveal limitations in things like level shifters. My Adafruit 1.8"
>> TFT has an HC4050 for 5v - 3.3v conversion which can't handle the speed.
>>
>> --
>> "The theater of noise is proof of our potential."
>> |\ |  (¯  \/ |¯\  |V| |\ ¯|¯ |¯) | \/ | | | |¯\ (¯   /¯  /\ |V|
>> |-||_ (_  /\ |_/ @| | |-| |  | \ | /\ |^| | |_/ (_ . \_  \/ | |
>>
>> You won't find me on Facebook.
>>
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>
>
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