Un écran lcd sur l’Orange Pi

sur le serveur « master » :

root@master:~# apt-get install nmap python-smbus

1	root@master:~# apt-get install nmap python-smbus

activer la prise en charge du port i2c0 avec le kernel mainline 4.10 :

root@master:~# cat /boot/armbianEnv.txt
verbosity=1
logo=disabled
console=both
disp_mode=1920x1080p60
overlay_prefix=sun8i-h3
overlays=i2c0
rootdev=UUID=ad705968-27e2-4b95-b597-bb5cfa710dbe
rootfstype=ext4

root@master:~# cat /boot/armbianEnv.txt

verbosity=1

logo=disabled

console=both

disp_mode=1920x1080p60

overlay_prefix=sun8i-h3

overlays=i2c0

rootdev=UUID=ad705968-27e2-4b95-b597-bb5cfa710dbe

rootfstype=ext4

lancer automatiquement les scripts d’affichage sur l’ecran lcd

root@master:~# nano /etc/rc.local
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.

#kernel 3
#echo none >/sys/class/leds/red_led/trigger
#echo mmc0 >/sys/class/leds/red_led/trigger
#echo 1 >/sys/class/leds/green_led/brightness

#kernel 4
echo mmc0 >/sys/class/leds/orangepi\:red\:status/trigger
echo default-on >/sys/class/leds/orangepi\:green\:pwr/trigger

/root/lcd_i2c/lcd_clusterpi.py &
ncat -4 -lk --send-only -p 4444 -c '/bin/lcdoutput.sh'

exit 0

root@master:~# nano /etc/rc.local

#!/bin/sh -e

# rc.local

# This script is executed at the end of each multiuser runlevel.

# Make sure that the script will "exit 0" on success or any other

# value on error.

# In order to enable or disable this script just change the execution

# bits.

# By default this script does nothing.

#kernel 3

#echo none >/sys/class/leds/red_led/trigger

#echo mmc0 >/sys/class/leds/red_led/trigger

#echo 1 >/sys/class/leds/green_led/brightness

#kernel 4

echo mmc0 >/sys/class/leds/orangepi\:red\:status/trigger

echo default-on >/sys/class/leds/orangepi\:green\:pwr/trigger

/root/lcd_i2c/lcd_clusterpi.py &

ncat -4 -lk --send-only -p 4444 -c '/bin/lcdoutput.sh'

exit 0

root@master:~# nano /bin/lcdoutput.sh
#!/bin/sh
CMD="unknown"
LINE="unknown"

while read line;
do

#temp=`cat /sys/class/thermal/thermal_zone1/temp`
read raw_temp </etc/armbianmonitor/datasources/soctemp

# kernel 4
#board_temp=$(awk "BEGIN {printf \"%d\", $raw_temp/1000}")
board_temp=$raw_temp

sd_usage=$(df -h / | awk '/\// {print $(NF-1)}' | sed 's/%//g')

# kernel 4
#mem_info=$(LANG=en_US.UTF-8 free -w 2>/dev/null | grep "^Mem" || LANG=en_US.UTF-8 free | grep "^Mem")
#mem_usg_pct=$(echo $mem_info | awk '{printf("%.0f",(($2-($4+$6+$7))/$2) * 100)}')

mem_usg_pct=$(free | awk '/Mem/ {printf("%.0f",(($2-($4+$6+$7))/$2) * 100)}')

#seti_load=`top -n1 -b | grep setiathome | cut -c49-50 | paste -sd+ | bc`
#sd_total=$(df -h / | awk '/\// {print $(NF-3)}')

load=$(cat /proc/loadavg | awk '{print $1}')

  CMD=`echo ${line}`


  case $CMD in
  sys)
        LINE="sd:$sd_usage% mem:$mem_usg_pct%"
  ;;
  temp)
        LINE="$board_temp.C $load"
  ;;
  *)
     	LINE="unknown"
  ;;
  esac
  echo $LINE
  break
done

root@master:~# nano /bin/lcdoutput.sh

#!/bin/sh

CMD="unknown"

LINE="unknown"

while read line;

#temp=`cat /sys/class/thermal/thermal_zone1/temp`

read raw_temp </etc/armbianmonitor/datasources/soctemp

# kernel 4

#board_temp=$(awk "BEGIN {printf \"%d\", $raw_temp/1000}")

board_temp=$raw_temp

sd_usage=$(df -h / | awk '/\// {print $(NF-1)}' | sed 's/%//g')

# kernel 4

#mem_info=$(LANG=en_US.UTF-8 free -w 2>/dev/null | grep "^Mem" || LANG=en_US.UTF-8 free | grep "^Mem")

#mem_usg_pct=$(echo $mem_info | awk '{printf("%.0f",(($2-($4+$6+$7))/$2) * 100)}')

mem_usg_pct=$(free | awk '/Mem/ {printf("%.0f",(($2-($4+$6+$7))/$2) * 100)}')

#seti_load=`top -n1 -b | grep setiathome | cut -c49-50 | paste -sd+ | bc`

#sd_total=$(df -h / | awk '/\// {print $(NF-3)}')

load=$(cat /proc/loadavg | awk '{print $1}')

CMD=`echo ${line}`

case $CMD in

sys)

LINE="sd:$sd_usage% mem:$mem_usg_pct%"

;;

temp)

LINE="$board_temp.C $load"

;;

LINE="unknown"

;;

esac

echo $LINE

break

done

root@master:~# nano /sbin/lcd_clusterpi.py
#!/usr/bin/python
#--------------------------------------
#    ___  ___  _ ____
#   / _ \/ _ \(_) __/__  __ __
#  / , _/ ___/ /\ \/ _ \/ // /
# /_/|_/_/  /_/___/ .__/\_, /
#                /_/   /___/
#
#  lcd_i2c.py
#  LCD test script using I2C backpack.
#  Supports 16x2 and 20x4 screens.
#
# Author : Matt Hawkins
# Date   : 20/09/2015
#
# http://www.raspberrypi-spy.co.uk/
#
# Copyright 2015 Matt Hawkins
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#
#--------------------------------------
import smbus
import time
import os 

# Define some device parameters
I2C_ADDR  = 0x27 # I2C device address
LCD_WIDTH = 16   # Maximum characters per line

# Define some device constants
LCD_CHR = 1 # Mode - Sending data
LCD_CMD = 0 # Mode - Sending command

LCD_LINE_1 = 0x80 # LCD RAM address for the 1st line
LCD_LINE_2 = 0xC0 # LCD RAM address for the 2nd line
LCD_LINE_3 = 0x94 # LCD RAM address for the 3rd line
LCD_LINE_4 = 0xD4 # LCD RAM address for the 4th line

LCD_BACKLIGHT  = 0x08  # On
#LCD_BACKLIGHT = 0x00  # Off

ENABLE = 0b00000100 # Enable bit

# Timing constants
E_PULSE = 0.0005
E_DELAY = 0.0005

#Open I2C interface
bus = smbus.SMBus(0)  # Rev 1 Pi uses 0
#bus = smbus.SMBus(1) # Rev 2 Pi uses 1

def lcd_init():
  # Initialise display
  lcd_byte(0x33,LCD_CMD) # 110011 Initialise
  lcd_byte(0x32,LCD_CMD) # 110010 Initialise
  lcd_byte(0x06,LCD_CMD) # 000110 Cursor move direction
  lcd_byte(0x0C,LCD_CMD) # 001100 Display On,Cursor Off, Blink Off 
  lcd_byte(0x28,LCD_CMD) # 101000 Data length, number of lines, font size
  lcd_byte(0x01,LCD_CMD) # 000001 Clear display
  time.sleep(E_DELAY)

def lcd_byte(bits, mode):
  # Send byte to data pins
  # bits = the data
  # mode = 1 for data
  #        0 for command

  bits_high = mode | (bits & 0xF0) | LCD_BACKLIGHT
  bits_low = mode | ((bits<<4) & 0xF0) | LCD_BACKLIGHT

  # High bits
  bus.write_byte(I2C_ADDR, bits_high)
  lcd_toggle_enable(bits_high)

  # Low bits
  bus.write_byte(I2C_ADDR, bits_low)
  lcd_toggle_enable(bits_low)

def lcd_toggle_enable(bits):
  # Toggle enable
  time.sleep(E_DELAY)
  bus.write_byte(I2C_ADDR, (bits | ENABLE))
  time.sleep(E_PULSE)
  bus.write_byte(I2C_ADDR,(bits & ~ENABLE))
  time.sleep(E_DELAY)

def lcd_string(message,line):
  # Send string to display

  message = message.ljust(LCD_WIDTH," ")

  lcd_byte(line, LCD_CMD)

  for i in range(LCD_WIDTH):
    lcd_byte(ord(message[i]),LCD_CHR)

def main():
  # Main program block

  # Initialise display
  lcd_init()

  while True:

    #Get CPU and temperature
    #temp = os.popen('cat /sys/class/thermal/thermal_zone1/temp').readline()

    ip = os.popen(' '+"ip addr show wlan0 | grep 'inet ' | cut -d'/' -f1 | cut -d 't' -f 2").readline()[:-1]
    #ip = os.popen('ip addr show wlan0').read().split("inet ")[1].split("/")[0]

    # Send some test
    lcd_string("OPI'One Cluster ",LCD_LINE_1)
    lcd_string(ip,LCD_LINE_2)

    time.sleep(2)

    s0l1 = os.popen("echo temp | nc -q -1 localhost 4444").readline() 
    s0l2 = os.popen("echo sys | nc -q -1 localhost 4444").readline()

    lcd_string("Pi0: "+s0l1[:-1],LCD_LINE_1)
    lcd_string(""+s0l2[:-1],LCD_LINE_2)

    time.sleep(2)
  
    s1l1 = os.popen("echo temp | nc -q -1 slave1 4444").readline() 
    s1l2 = os.popen("echo sys | nc -q -1 slave1 4444").readline()

    lcd_string("Pi1: "+s1l1[:-1],LCD_LINE_1)
    lcd_string(""+s1l2[:-1],LCD_LINE_2)

    time.sleep(2)

    s2l1 = os.popen("echo temp | nc -q -1 slave2 4444").readline() 
    s2l2 = os.popen("echo sys | nc -q -1 slave2 4444").readline()

    lcd_string("Pi2: "+s2l1[:-1],LCD_LINE_1)
    lcd_string(""+s2l2[:-1],LCD_LINE_2)

    time.sleep(2)

if __name__ == '__main__':

  try:
    main()
  except KeyboardInterrupt:
    pass
  finally:
    lcd_byte(0x01, LCD_CMD)

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root@master:~# nano /sbin/lcd_clusterpi.py

#!/usr/bin/python

#--------------------------------------

# ___ ___ _ ____

# / _ \/ _ \(_) __/__ __ __

# / , _/ ___/ /\ \/ _ \/ // /

# /_/|_/_/ /_/___/ .__/\_, /

# /_/ /___/

# lcd_i2c.py

# LCD test script using I2C backpack.

# Supports 16x2 and 20x4 screens.

# Author : Matt Hawkins

# Date : 20/09/2015

# http://www.raspberrypi-spy.co.uk/

# This program is free software: you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License

# along with this program. If not, see <http://www.gnu.org/licenses/>.

#--------------------------------------

import smbus

import time

import os

# Define some device parameters

I2C_ADDR = 0x27 # I2C device address

LCD_WIDTH = 16 # Maximum characters per line

# Define some device constants

LCD_CHR = 1 # Mode - Sending data

LCD_CMD = 0 # Mode - Sending command

LCD_LINE_1 = 0x80 # LCD RAM address for the 1st line

LCD_LINE_2 = 0xC0 # LCD RAM address for the 2nd line

LCD_LINE_3 = 0x94 # LCD RAM address for the 3rd line

LCD_LINE_4 = 0xD4 # LCD RAM address for the 4th line

LCD_BACKLIGHT = 0x08 # On

#LCD_BACKLIGHT = 0x00 # Off

ENABLE = 0b00000100 # Enable bit

# Timing constants

E_PULSE = 0.0005

E_DELAY = 0.0005

#Open I2C interface

bus = smbus.SMBus(0) # Rev 1 Pi uses 0

#bus = smbus.SMBus(1) # Rev 2 Pi uses 1

def lcd_init():

# Initialise display

lcd_byte(0x33,LCD_CMD) # 110011 Initialise

lcd_byte(0x32,LCD_CMD) # 110010 Initialise

lcd_byte(0x06,LCD_CMD) # 000110 Cursor move direction

lcd_byte(0x0C,LCD_CMD) # 001100 Display On,Cursor Off, Blink Off

lcd_byte(0x28,LCD_CMD) # 101000 Data length, number of lines, font size

lcd_byte(0x01,LCD_CMD) # 000001 Clear display

time.sleep(E_DELAY)

def lcd_byte(bits, mode):

# Send byte to data pins

# bits = the data

# mode = 1 for data

# 0 for command

bits_high = mode | (bits & 0xF0) | LCD_BACKLIGHT

bits_low = mode | ((bits<<4) & 0xF0) | LCD_BACKLIGHT

# High bits

bus.write_byte(I2C_ADDR, bits_high)

lcd_toggle_enable(bits_high)

# Low bits

bus.write_byte(I2C_ADDR, bits_low)

lcd_toggle_enable(bits_low)

def lcd_toggle_enable(bits):

# Toggle enable

time.sleep(E_DELAY)

bus.write_byte(I2C_ADDR, (bits | ENABLE))

time.sleep(E_PULSE)

bus.write_byte(I2C_ADDR,(bits & ~ENABLE))

time.sleep(E_DELAY)

def lcd_string(message,line):

# Send string to display

message = message.ljust(LCD_WIDTH," ")

lcd_byte(line, LCD_CMD)

for i in range(LCD_WIDTH):

lcd_byte(ord(message[i]),LCD_CHR)

def main():

# Main program block

# Initialise display

lcd_init()

while True:

#Get CPU and temperature

#temp = os.popen('cat /sys/class/thermal/thermal_zone1/temp').readline()

ip = os.popen(' '+"ip addr show wlan0 | grep 'inet ' | cut -d'/' -f1 | cut -d 't' -f 2").readline()[:-1]

#ip = os.popen('ip addr show wlan0').read().split("inet ")[1].split("/")[0]

# Send some test

lcd_string("OPI'One Cluster ",LCD_LINE_1)

lcd_string(ip,LCD_LINE_2)

time.sleep(2)

s0l1 = os.popen("echo temp | nc -q -1 localhost 4444").readline()

s0l2 = os.popen("echo sys | nc -q -1 localhost 4444").readline()

lcd_string("Pi0: "+s0l1[:-1],LCD_LINE_1)

lcd_string(""+s0l2[:-1],LCD_LINE_2)

time.sleep(2)

s1l1 = os.popen("echo temp | nc -q -1 slave1 4444").readline()

s1l2 = os.popen("echo sys | nc -q -1 slave1 4444").readline()

lcd_string("Pi1: "+s1l1[:-1],LCD_LINE_1)

lcd_string(""+s1l2[:-1],LCD_LINE_2)

time.sleep(2)

s2l1 = os.popen("echo temp | nc -q -1 slave2 4444").readline()

s2l2 = os.popen("echo sys | nc -q -1 slave2 4444").readline()

lcd_string("Pi2: "+s2l1[:-1],LCD_LINE_1)

lcd_string(""+s2l2[:-1],LCD_LINE_2)

time.sleep(2)

if __name__ == '__main__':

try:

main()

except KeyboardInterrupt:

pass

finally:

lcd_byte(0x01, LCD_CMD)

Un écran lcd sur l’Orange Pi

Pierrick's lab

Un écran lcd sur l’Orange Pi

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