francisr6 wrote:With the Mega or the Uno displaying a bitmap is so slow that in fact it can not be used to build serious user interfaces i went to the due to solve this, unfortunately despite my efforts it does not work. As the libraries do not seem to be comming soon i will change my mind and go another way.
I don't know if it helps, I am NOT using a Mega, an Uno, or an arduino at all for that matter.
On my Teensy 3.0 I realized that slow display of bitmaps was (in my case) due to slow SD reading (12KB/s).
Since I have upgraded to SdFat beta libraries
, and now achieved read/write speeds at least(!) 10x faster, which makes loading a bitmap much more 'realtime'.
The SdFat beta should support Mega, not so sure about Uno.guide with speed-benchmarks on a Teensy 3.0
Anyway, don't want to butt in, simply hoping I can help out :)(edit: added 2 links)