I'm having problems getting a cheap 2.8 SPI TFT display to work. I assume it's a common cheap display as I find it quite a lot in searches. Here's a link to it:
Here's what I have done so far:
I hooked the display up to a cheap zero clone and using the adafruit libraries for a display with an ILI9341 driver and got no response from the display. I edited the code to use the ICSP connectors for MOSI, CLK, MISO, and made changes to get the code to run on a arduino zero.
Next, since this is a 3.3v logic unit, I hooked up it to an arduino UNO using a resistor voltage divider, as documented on several web searches on the subject, to give me the correct logic levels. Still, no response from the display. On the UNO, I was using the ICSP for those connections.
I then tried an adafruit 2.8 LCD display shield on my UNO. The shield was modded to use the ICSP for the SPI communication. It worked, as always.
Tried the shield LCD display on the cheap zero clone, and it worked.
At this point, I bought another display, assuming I had a defective unit. New display doesn't work either.
I'm working on a breadboard using jumpers, and I've just checked all the jumpers/connections with an ohm meter and seeing almost no resistance.
I'm a bit lost as to what to look at next to figure this out.....
Thanks for any suggestions!