Elecrow 5inch 800x480 LCD configuration for Raspberry Pi (Add to the bottom of /boot/config.txt)

elecrow_config.txt

### Elecrow HDMI 5inch 800x480 LCD display
# https://www.amazon.com/Elecrow-Display-Monitor-800x480-Raspberry/dp/B013JECYF2/
# Adopted from the following URL. Modified for clarity and corrections.
# https://www.amazon.com/gp/aw/review/B013JECYF2/R3ZXW0VTV8AEB/ref=cm_cr_dp_mb_rvw_1?ie=UTF8&cursor=1
# DOCUMENTATION > CONFIGURATION > CONFIG-TXT
# https://www.raspberrypi.org/documentation/configuration/config-txt.md

###  Display configuration
# hdmi_group: 0 auto-detect from EDID; 1 CEA; 2 DMT
hdmi_group=2
# hdmi_mode: 87 custom configuration
hdmi_mode=87
# hdmi_cvt: <width> <height> <framerate in Hz> <aspect 6 is 15:9> <margins> <interlace> <rb>
hdmi_cvt 800 480 60 6 0 0 0


###  Touch panel activation
# Serial Peripheral Interface (SPI) Bus
# https://www.raspberrypi.org/documentation/hardware/raspberrypi/spi/README.md
# Gibhub: raspberrypi/firmware/boot/overlays/README
# https://github.com/raspberrypi/firmware/blob/master/boot/overlays/README

###   Enable interfaces
# enable the spi interfaces
dtparam=spi=on
# enable the ARM's i2c interface
dtparam=i2c_arm=on

###   Configure touch panel
# penirq is required and usually xohms (60-100) has to be set as well.
# Apart from that, pmax (255) and swapxy are also common.
# The rest of the calibration can be done with xinput-calibrator.
# See: github.com/notro/fbtft/wiki/FBTFT-on-Raspian
# Device Tree binding document:
# www.kernel.org/doc/Documentation/devicetree/bindings/input/ads7846.txt
# Device tree bindings for TI's ADS7843, ADS7845, ADS7846, ADS7873, TSC2046
# SPI driven touch screen controllers.
# https://www.kernel.org/doc/Documentation/devicetree/bindings/input/ads7846.txt

# Activate ADS7846 Touch controller
dtoverlay=ads7846
# cs: SPI bus Chip Select (default 1)
dtparam=cs=1
# penirq: GPIO used for PENIRQ. REQUIRED
dtparam=penirq=25
# penirq_pull: Set GPIO pull (default 0=none, 2=pullup)
dtparam=penirq_pull=2
# speed: SPI bus speed (default 2MHz, max 3.25MHz)
dtparam=speed=50000
# set to keep vref on for differential measurements as well
dtparam=keep_vref_on=0
# swapxy: Swap x and y axis
dtparam=swapxy=0
# pmin: Minimum reported pressure value (default 0)
# pmax: Maximum reported pressure value (default 65535)
dtparam=pmax=255
# xohms: Touchpanel sensitivity (X-plate resistance) (default 400)
dtparam=xohms=150
# Use xinput-calibrator to obtain these values
#  $ sudo aptitute install xinput-calibrator
#  Pi menu - Preferences - Calibrate Touch Screen
# xmin: Minimum value on the X axis (default 0)
dtparam=xmin=148
# xmax: Maximum value on the X axis (default 4095)
dtparam=xmax=3948
# ymin: Minimum value on the Y axis (default 0)
dtparam=ymin=283
# ymax: Maximum value on the Y axis (default 4095)
dtparam=ymax=4015


# Configures the w1-gpio Onewire interface module.
# Use this overlay if you *do* need a GPIO to drive an external pullup.
dtoverlay=w1-gpio-pullup
# gpiopin: GPIO for I/O (default "4")
dtparam=gpiopin=4
# pullup: Non-zero, "on", or "y" to enable the parasitic
#         power (2-wire, power-on-data) feature
# extpullup: GPIO for external pullup (default "5")
dtparam=extpullup=1