RPI Display

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(Redirected from RPI 7'' Display)

- new wiki page: https://w2.electrodragon.com/board-series-dat/RPI-LCD/RPI-LCD-dat.md

SPI GPIO LCD

1.8 SPI LCD

Alternative Method GPIO LCD

  • Use latest system
  • sudo nano /boot/config.txt -> add ->
dtparam=i2c_arm=on,spi=on
dtoverlay=pitft28-resistive, rotate=270 speed=48000000 fps=30


  • Make debug monitor on screen -> sudo nano /boot/cmdline.txt before“rootwait” -> add -> fbcon=map:10 fbcon=font:VGA8x8

Enter into graphic system

  • sudo nano ~/.profile -> add -> export FRAMEBUFFER=/dev/fb1
  • raspi-config -> Enable Boot to Desktop/Scratch” -> ”Desktop log in as user ‘pi’ at the graphical desktop


Schematic

HDMI

Vendor GoodDisplay

for 5 -> sudo ./LCD5-show
  • important, if display blink, make sure USB power is enough, otherwise attach usb power to display too
  • make sure no other pins used touch screen GPIOs
2018-06-21 182643.png

Note

  • change back to traditional LCD -> sudo ./LCD-hdmi

DPI - LCD

VGA

enable_dpi_lcd=1 
display_default_lcd=1
dpi_group=2 
dpi_mode=82
  • or 1366×768@60
dpi_group=2 
dpi_mode=86
  • If use 3B, please use latest raspbian system, and add following two times to turn off uart and bluetooth.
#disable the bluetooth only for pi3
dtparam=uart1=off
dtoverlay=pi3-disable-bt-overlay

Debug

  • Also turn off SPI, IIC, Serial, 1-wire, remote IO in raspi-config in case
  • Plug VGA before power up.

E-Paper

  • Side pins for arduino, not soldered
  • Freeze screen when lose power
  • Very simple demo from arduino, not continue show..