This 3.5 inch TFT LCD touchscreen module connects directly to the Raspberry PI. The resolution is 320x480. This display has been tested with the latest version of Raspbian. The installation instructions are below.

Specifications

Interface

3.5inch TFT Touchscreen install instructions

Overview

The reference instructions were on the right track, however not complete.
Reference instructions: [https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=178443]

The following instructions worked for a Raspberry PI 3 with Raspbian installed.
Assumptions: basic cli navigation knowledge, ssh enabled, have networking enabled, are connected to the internet and have latest version of Raspbian as of May 2017.

Steps

Enable SPI

sudo raspi-config
Navigate to 5 Interfacing options and enable SPI (P4 SPI)
sudo reboot

Update Raspberry PI

sudo apt-get update
sudo apt-get upgrade
sudo reboot

Setup config.txt file for piscreen

sudo nano /boot/config.txt
Add this line to the bottom of the file:
dtoverlay=piscreen,speed=16000000,rotate=270
Save and exit

Install fbi - framebuffer imagerviewer

sudo apt-get install fbi
sudo nano /usr/share/X11/xorg.conf.d/99-fbturbo.conf
Change
Option "fbdev" "/dev/fb0"
to
Option "fbdev" "/dev/fb1"
Save and exit

Setup touchscreen script

sudo nano .config/lxsession/LXDE-pi/touchscreen.sh
Add the following lines to the touchscreen.sh file

DISPLAY=:0 xinput --set-prop 'ADS7846 Touchscreen' 'Evdev Axes Swap' 0
DISPLAY=:0 xinput --set-prop 'ADS7846 Touchscreen' 'Evdev Axis Inversion' 0 1

Save and exit
Change the file permissions
sudo chmod a+x .config/lxsession/LXDE-pi/touchscreen.sh
Run the script at startup
sudo nano .config/lxsession/LXDE-pi/autostart
Insert the following after @pcmanfm --desktop --profile LXDE-pi but before @xscreensaver -no-splash:
@lxterminal -e .config/lxsession/LXDE-pi/touchscreen.sh
Save and exit

Install xinput

sudo apt-get install xinput

Reboot and test

sudo reboot

The following instructions worked for a Raspberry PI 4 with Raspbian installed.
Assumptions: basic cli navigation knowledge, ssh enabled, have networking enabled, are connected to the internet and have latest version of Raspbian. Tested on November 202.

Steps

Enable SPI

sudo raspi-config
Navigate to 5 Interfacing options and enable SPI (P4 SPI)
sudo reboot

Update Raspberry PI

sudo apt-get update
sudo apt-get upgrade
sudo reboot

Get the Configuration Script

sudo rm -rf LCD-show
git clone https://github.com/goodtft/LCD-show.git
chmod -R 755 LCD-show
cd LCD-show/
sudo ./LCD35-show

Reboot and test

sudo reboot