Due with st7781 2.4" TFT touch module.

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hi.

i have $5 tft touch module, this film .
most important is, used chips 5v tolerant, module 3.3 volt, can safe connect due.
5v used backlight, , no connect data pins.
this cheapest module works fine uno , mega, not due.
it no wonder, because due different hardware.
i changed uno/mega library , looks i'm close success, ran out of ideas.

what works ?
tft works.
example graphictest runs fine , fast.

what not works ?
sd card, think there many working libraries, search.
touch not works.
example  touchscreendemoshield works , returns values serial, mean hardware connected well.
but example tftpaint not works.
i think problem is, touch pins shared tft data.
avr ports different of arm ports.
it 4-wire resistive touch, read adc.
something goes wrong, , program can't read true values.

the files in attachment.

is wants play it?

regards.

arduino uno + tft7781 made in china, not work


Arduino Forum > Using Arduino > Displays > Due with st7781 2.4" TFT touch module.


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