Random Raspberry Pi TFT Notes

notes.txt

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2014-07-27 - Texy / Adafruit - 1.8" SPI TFT display, 160x128 18-bit color - ST7735R driver (LCD/TFT)
# http://www.adafruit.com/products/618
# http://www.adafruit.com/products/358
# http://www.raspberrypi.org/forums/viewtopic.php?f=64&t=40677 - 1.8 TFT LCD add-on shield board
# http://www.raspberrypi.org/forums/viewtopic.php?f=59&t=43286 - 1.8" TFT LCD Shield board v2
# http://www.raspberrypi.org/forums/viewtopic.php?f=93&t=43286&p=396430#p396430 - "switching the backlight on and off works!"
"I removed the connectors of pins 15 and 16 between the TFT board and the shield board, rewired pin 15 to the 3.3V rail, and pin 16 to collector in a standard NPN transistor. Base of this transistor is connected to a free GPIO out and emitter goes to GND."
# http://minhdanh2002.blogspot.pt/2013/11/experimenting-with-st7735-18-128x160.html - LCD board pinout
# http://www.raspberrypi.org/forums/viewtopic.php?t=40677 - Este tem os botões !!
# http://www.raspberrypi.org/forums/viewtopic.php?f=59&t=40674#p340540 V2 pictures
# http://www.whence.com/rpi/
# https://learn.adafruit.com/adafruit-pitft-28-inch-resistive-touchscreen-display-raspberry-pi/software-installation

Original:
LCD Pin 6 (LCD RESET) => GPIO Pin 22 - GPIO 7 - SPI0_CE1_N
LCD Pin 7 (LCD A0 (R/S)) => GPIO Pin 18 - GPIO 24
LCD Pin 8 (LCD SDA) => GPIO Pin 19 - GPIO 10 - SPI0_MOSI
LCD Pin 9 (LCD SCK) => GPIO Pin 23 - GPIO 11 - SPI0_CLK
LCD Pin 10 (LCD CS) => GPIO Pin 24 - GPIO 8 - SPI0_CE0_N
LCD Pin 15 (LED +) => GPIO Pin 2 (5V)
LCD Pin 16 (LED -) => GPIO Pin 6 (GND)

gpio pin 21 = UP
gpio pin 13 = DOWN
gpio pin 26 = SELECT


Modified
LCD Pin 15 => 1 (3.3V)
LCD Pin 16 => BC547 C
GPIO Pin 6 => BC547 E
GPIO Pin ? => BC547 B



mkdir -p ~/work/share/lcd/adafruit-pitft-2.8
cd ~/work/share/lcd/adafruit-pitft-2.8

wget http://adafruit-download.s3.amazonaws.com/libraspberrypi-bin-adafruit.deb
wget http://adafruit-download.s3.amazonaws.com/libraspberrypi-dev-adafruit.deb
wget http://adafruit-download.s3.amazonaws.com/libraspberrypi-doc-adafruit.deb
wget http://adafruit-download.s3.amazonaws.com/libraspberrypi0-adafruit.deb
wget http://adafruit-download.s3.amazonaws.com/raspberrypi-bootloader-adafruit-20140724-1.deb

sudo dpkg -i -B *.deb

sudo reboot

sudo modprobe spi-bcm2708
sudo modprobe fbtft_device name=sainsmart18 speed=32000000 fps=50 rotate=270

sudo apt-get install fbi

cd ~/work/share/lcd/adafruit-pitft-2.8
wget http://adafruit-download.s3.amazonaws.com/adapiluv320x240.jpg
sudo fbi -T 2 -d /dev/fb1 -noverbose -a adapiluv320x240.jpg

sudo sh -c 'echo spi-bcm2708 >> /etc/modules'
sudo sh -c 'echo fbtft_device >> /etc/modules'
sudo sh -c 'echo options fbtft_device name=sainsmart18 speed=32000000 fps=50 rotate=270 gpios=reset:25,dc:24,led:23>> /etc/modprobe.d/sainsmart18.conf'

sudo dpkg-reconfigure console-setup
# ... and go thru to select Terminus 6x12

sudo vi /boot/cmdline.txt

# Add fbcon=map:10 fbcon=font:VGA8x8

# tests

mkdir -p ~/work/share/lcd/texy

cd ~/work/share/lcd/texy
sudo apt-get update
sudo apt-get install -y python-dev python-pip
sudo pip install wiringpi2

unset DISPLAY
sudo test.py

# Turning the display on/off

sudo sh -c "echo 23 > /sys/class/gpio/export"
ls -l /sys/class/gpio
sudo sh -c "echo 'out' > /sys/class/gpio/gpio23/direction"
sudo sh -c "echo '1' > /sys/class/gpio/gpio23/value"
sudo sh -c "echo '0' > /sys/class/gpio/gpio23/value"

sudo -E sh -c 'cat <<EOF >/etc/init.d/backlight
#! /bin/sh

### BEGIN INIT INFO
# Provides:             backlight
# Required-Start:       
# Required-Stop:        
# Default-Start:        S 2 3 4 5
# Default-Stop:         0 1 6
# Short-Description:    Backlight control
# Description:          Backlight via GPIO for Sainsmart 1.8" display
### END INIT INFO

set -e

GPIO=23

case "\$1" in
  start)
        [[ -f /sys/class/gpio/gpio\$GPIO ]] || echo \$GPIO > /sys/class/gpio/export
        echo 'out' > /sys/class/gpio/gpio\$GPIO/direction
        echo '1' > /sys/class/gpio/gpio\$GPIO/value
        ;;
  stop)
        echo '0' > /sys/class/gpio/gpio\$GPIO/value
        echo \$GPIO > /sys/class/gpio/unexport
        ;;
  *)
        log_action_msg "Usage: /etc/init.d/backlight {start|stop}" || true
        exit 1
esac

exit 0
EOF'

sudo chmod 755 /etc/init.d/backlight




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2014-07-27 - Adafruit PiTFT - 2.8" Touchscreen Display for Raspberry Pi (LCD/TFT)
# https://learn.adafruit.com/adafruit-pitft-28-inch-resistive-touchscreen-display-raspberry-pi/software-installation


mkdir -p ~/work/share/adafruit-pitft-2.8
cd ~/work/share/adafruit-pitft-2.8

wget http://adafruit-download.s3.amazonaws.com/libraspberrypi-bin-adafruit.deb
wget http://adafruit-download.s3.amazonaws.com/libraspberrypi-dev-adafruit.deb
wget http://adafruit-download.s3.amazonaws.com/libraspberrypi-doc-adafruit.deb
wget http://adafruit-download.s3.amazonaws.com/libraspberrypi0-adafruit.deb
wget http://adafruit-download.s3.amazonaws.com/raspberrypi-bootloader-adafruit-20140724-1.deb

sudo dpkg -i -B *.deb

## The rest of the module was already installed :(

sudo sh -c 'echo "options fbtft_device name=adafruitts rotate=90 frequency=32000000" >> /etc/modprobe.d/adafruit.conf'

sudo vi /etc/modprobe.d/adafruit.conf