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  • Author Author: verrverr
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Pas Home / PiTFT

verrverr

Pas Home - Index

 

This week a play with the PiTFT from Adafruit https://www.adafruit.com/products/1601, also available on newark Product LinkProduct Link

image

 

I want use the PiTFT with Pi for made a control panel to install in my kitchen and easily open/close my curtain, view and change heating temperature and control my home ventilation.

 

Setup

 

This is the procedure a use to setup my device https://github.com/pascalmartin/ForgetMeNot/tree/master/bundles/pitft

 

Usefull tips

  • To startx to HDMI Display

FRAMEBUFFER=/dev/fb0 startx

  • To open a console after start with browser in full screen Press CTRL+ALT+F1 and hit return and enter your login

Pi Installation

More complete documentation on Adafruit

Summary :

Step 1

Prepare Micro SD card:

Step 2

Pi configuration

  • Boot Pi with PiTFT on it, extend file system and configure password, timezone and keyboard reboot
  • Configure wifi using WiFi Config utility

Use this command to startx using the hdmi display (Very more usefull for configure WIFI)

FRAMEBUFFER=/dev/fb0 startx

The normal startx command use PiTFT display

  • Logout and Reboot

sudo reboot

  • Update raspberrypi

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

Step 3

Change Pi hostname for easily identification on your wifi router Details

sudo sed -i 's/raspberrypi/RPi-PiTFT/g' /etc/hosts 
sudo sed -i 's/raspberrypi/RPi-PiTFT/g' /etc/hostname 
sudo /etc/init.d/hostname.sh 
sudo reboot

Step 4

Auto run browser on startup

Some resource :

Summary:

  • Install dependency package

sudo apt-get install matchbox chromium x11-xserver-utils ttf-mscorefonts-installer xwit sqlite3 libnss3 sudo reboot

  • Adding the following to /etc/rc.local:

if [ -f /boot/xinitrc ]; then
  ln -fs /boot/xinitrc /home/pi/.xinitrc;
  su - pi -c 'startx' &
fi

 

  • Create xinitrc file /boot/xinitrc

#!/bin/sh
while true; do

  # Clean up previously running apps, gracefully at first then harshly
  killall -TERM chromium 2>/dev/null;
  killall -TERM matchbox-window-manager 2>/dev/null;
  sleep 2;
  killall -9 chromium 2>/dev/null;
  killall -9 matchbox-window-manager 2>/dev/null;

  # Clean out existing profile information
  #rm -rf /home/pi/.cache;
  #rm -rf /home/pi/.config;
  #rm -rf /home/pi/.pki;

  # Generate the bare minimum to keep Chromium happy!
  #mkdir -p /home/pi/.config/chromium/Default
  #sqlite3 /home/pi/.config/chromium/Default/Web\ Data "CREATE TABLE meta(key LONGVARCHAR NOT NULL UNIQUE PRIMARY KEY, value LONGVARCHAR); INSERT INTO meta VALUES('version','46'); CREATE TABLE keywords (foo INTEGER);";

  # Disable DPMS / Screen blanking
  #xset -dpms # disable DPMS (Energy Star) features.
  #xset s off # don't activate screensaver

  # Reset the framebuffer's colour-depth
  #fbset -depth $( cat /sys/module/*fb*/parameters/fbdepth );

  # Hide the cursor (move it to the bottom-right, comment out if you want mouse interaction)
  #xwit -root -warp $( cat /sys/module/*fb*/parameters/fbwidth ) $( cat /sys/module/*fb*/parameters/fbheight )

  # Start the window manager (remove "-use_cursor no" if you actually want mouse interaction)
  #matchbox-window-manager -use_titlebar no -use_cursor no &
  matchbox-window-manager -use_titlebar no &

  # Start the browser (See http://peter.sh/experiments/chromium-command-line-switches/)
  chromium --app=http://192.168.0.150:8080/openhab.app?sitemap=demo

done;

  • Reboot

sudo reboot

 

Step 5

Configure tactile switch as power button From Adafruit
gpio pin from left to right : 23, 22, 21, 18 (I'm not use 23 because is on top of usb connector and the metal short the switch, i need a case)

Summary:

  • Add rpi_power_switch to /etc/modules

sudo sed -i '$ a\rpi_power_switch' /etc/modules

  • Append options rpi_power_switch gpio_pin=18 mode=0 to /etc/modprobe.d/adafruit.conf

sudo sed -i '$ a\options rpi_power_switch gpio_pin=18 mode=0'  /etc/modprobe.d/adafruit.conf

  • To make it active immediately run sudo modprobe rpi_power_switch or reboot

sudo modprobe rpi_power_switch