It is possible to connect this LCD TFT screen to the raspberry 3 model B please ? I don’t understand the schematic for SPI connection. Any help is welcome thank you.
I have follow this answer but it does not help me.
Probably this library can help me for the driver, but I do not know how to connect that.
SPI 2.8″ TFT LCD ILI9341
Well, 60% chance OK.
First thing first – check out spec and schematic.
The OP’s question is clear, and his reference web links are very good. So I followed his links and jot down a picture of the wiring.
The drive/library referred by the OP is a couple of years old, and no longer supported. So I need to google to catch up.
so I googled and found everybody is using the ILI19341 de facto standard. That means all ILI19341 are more or less the same and can be used with any such driver. I searched AliExpress and found the following typical goody.
I google to catch up and the the found the following tutorial looking good.
It gives a clear wiring (see Reference below), and the detailed instructions and commands to switch between HDMI mon and TFT screen.
One thing I am not that happy is the following:
You cannot use HDMI monitor and TFT touch screen at the same time!
Fig 7 – Con 1 – 9 pin x 2 = 18 pin Connector
Fig 8 – vm412 Touch LCD signals
Fig 9 – stm32 Touch LCD signals
Fig 10 Arduino Mega 2650 Pinout
Now I have my US$300, 4 channel, 50MHz, 1GSa/s Digital Storage Oscilloscope Rigol Ds1504Z ready to check out the SPI waveforms.
Fig 11 – SPI waveform
Fig 12 – SPI Signal Routing Cable
/ to continue, …
AliExpress ILI9341 240 x 320 2.8″ SPI TFT LCD Touch Screen
2.8 ” SPI, 36.72mm W X 48.96 mm H, 8.5 x 4.8 cm/ Conductive element: active matrix a-si TFT IC Driver: ILI9341, Backlight: White LED
Visualization direction: 6 hours, Depth of color: 262 K / 65 K
Resolution): 240 RGB * 320 5V, use with 3.3 V or 5 V logic
Moduole Power = 3V3
Wiring (BCM Mode)
SCK – Rpi SPI Clok (GPIO 11)
MISO – Rpi SPI MISO (GPIO 9)
MOSI – Rpi SPI MOSI (GPIO 10)
CS – Rpi SPI CE0N (GPIO 8)
RST – Rpi GPIO GEN 6 (GPIO 25)
BL – Rpi GPIO GEN 1 (GPIO 18）
DC – Rpi GPIO GEN 5 (GPIO 24)
AdaFruit PiTFT Plus Assembled 320×240 2.8″ TFT + Resistive Touchscreen $35https://www.adafruit.com/product/2298