I'm developing a board to connect an arduino to an ILI9341 touch screen. To make things simple, I'm using the same 18 pin screens Helder uses. I've encountered one problem, though. As I'm testing on a breadboard, I don't know what to do with the SDA/SDO lines. I know I'm supposed to connect those to MOSI/MISO on the arduino. However, nothing appears on the screen.
Any advice on how I should properly wire this up? I'm getting a level shifter tomorrow to replace the resistors I'm using for the arduino's 5V logic, so that may help, but I still don't understand whether SDO is to MISO or MOSI.
Any advice on how I should properly wire this up? I'm getting a level shifter tomorrow to replace the resistors I'm using for the arduino's 5V logic, so that may help, but I still don't understand whether SDO is to MISO or MOSI.
(just replicate the pinouts on your bare ili9341 LCD)
NB: this may also be useful for those who want to take part in the Community Competition/Challenge (ESP32)....
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Re: Wiring an ILI9341 SPI TFT to an arduino
Posted: Sun Jun 03, 2018 8:43 am
by Sushi
I should mention that I'm not using a driver board on the LCD. I have the pure LCD panel and I've soldered some wires directly to the pins on the ribbon connector. Because I can't find datasheets for these displays, I've just been going off of the pinouts provided by the sellers' pages. However, I can't figure out what to do with SDA/SDO.
I should mention that I'm not using a driver board on the LCD. I have the pure LCD panel and I've soldered some wires directly to the pins on the ribbon connector. Because I can't find datasheets for these displays, I've just been going off of the pinouts provided by the sellers' pages. However, I can't figure out what to do with SDA/SDO.
i figured from the link you provided you were using a bare LCD
(i did also mention it in my previous post, which has the wiring diagrams for the two different arduino boards )
the pin outs for these screens are pretty much the same across the different sizes
it might have not been a bad idea to use moosepr board for testing purposes (just to be on the safe side)
Awesome, thanks! I just ordered some of those boards (should make testing much easier).
Re: Wiring an ILI9341 SPI TFT to an arduino
Posted: Sun Dec 08, 2019 3:49 pm
by treyjazz
I bought 3 of these screens (https://www.aliexpress.com/item/3291507 ... 4c4dt1M8aH) and I'm trying to get some signs of life out of them. They are bare modules so I soldered wires to the flex cable. Everything is fine with continuity and I have checked the wiring on the Arduino side of things as well as trying different boards. I have shined a flashlight through the back in case it was just the backlight not working but nothing shows. Is that 18 pin pin out right?
Edit: I finally got it working right, but only on an RPi. They just seem to refuse to work on Arduino (tried UNO, Mega, NANO, Pro Micro, ESP8266).
